#include "t4fw_api.h"
#include "cxgb4_ptp.h"
#include "cxgb4_uld.h"
+#include "cxgb4_tc_mqprio.h"
/*
* Rx buffer size. We use largish buffers if possible but settle for single
tnl_lso->EthLenOffset_Size = htonl(CPL_TX_TNL_LSO_SIZE_V(skb->len));
}
+static inline void *write_tso_wr(struct adapter *adap, struct sk_buff *skb,
+ struct cpl_tx_pkt_lso_core *lso)
+{
+ int eth_xtra_len = skb_network_offset(skb) - ETH_HLEN;
+ int l3hdr_len = skb_network_header_len(skb);
+ const struct skb_shared_info *ssi;
+ bool ipv6 = false;
+
+ ssi = skb_shinfo(skb);
+ if (ssi->gso_type & SKB_GSO_TCPV6)
+ ipv6 = true;
+
+ lso->lso_ctrl = htonl(LSO_OPCODE_V(CPL_TX_PKT_LSO) |
+ LSO_FIRST_SLICE_F | LSO_LAST_SLICE_F |
+ LSO_IPV6_V(ipv6) |
+ LSO_ETHHDR_LEN_V(eth_xtra_len / 4) |
+ LSO_IPHDR_LEN_V(l3hdr_len / 4) |
+ LSO_TCPHDR_LEN_V(tcp_hdr(skb)->doff));
+ lso->ipid_ofst = htons(0);
+ lso->mss = htons(ssi->gso_size);
+ lso->seqno_offset = htonl(0);
+ if (is_t4(adap->params.chip))
+ lso->len = htonl(skb->len);
+ else
+ lso->len = htonl(LSO_T5_XFER_SIZE_V(skb->len));
+
+ return (void *)(lso + 1);
+}
+
/**
* t4_sge_eth_txq_egress_update - handle Ethernet TX Queue update
* @adap: the adapter
len += sizeof(*cpl);
if (ssi->gso_size) {
struct cpl_tx_pkt_lso_core *lso = (void *)(wr + 1);
- bool v6 = (ssi->gso_type & SKB_GSO_TCPV6) != 0;
- int l3hdr_len = skb_network_header_len(skb);
- int eth_xtra_len = skb_network_offset(skb) - ETH_HLEN;
struct cpl_tx_tnl_lso *tnl_lso = (void *)(wr + 1);
if (tnl_type)
if (skb->ip_summed == CHECKSUM_PARTIAL)
cntrl = hwcsum(adap->params.chip, skb);
} else {
- lso->lso_ctrl = htonl(LSO_OPCODE_V(CPL_TX_PKT_LSO) |
- LSO_FIRST_SLICE_F | LSO_LAST_SLICE_F |
- LSO_IPV6_V(v6) |
- LSO_ETHHDR_LEN_V(eth_xtra_len / 4) |
- LSO_IPHDR_LEN_V(l3hdr_len / 4) |
- LSO_TCPHDR_LEN_V(tcp_hdr(skb)->doff));
- lso->ipid_ofst = htons(0);
- lso->mss = htons(ssi->gso_size);
- lso->seqno_offset = htonl(0);
- if (is_t4(adap->params.chip))
- lso->len = htonl(skb->len);
- else
- lso->len = htonl(LSO_T5_XFER_SIZE_V(skb->len));
- cpl = (void *)(lso + 1);
-
- if (CHELSIO_CHIP_VERSION(adap->params.chip)
- <= CHELSIO_T5)
- cntrl = TXPKT_ETHHDR_LEN_V(eth_xtra_len);
- else
- cntrl = T6_TXPKT_ETHHDR_LEN_V(eth_xtra_len);
-
- cntrl |= TXPKT_CSUM_TYPE_V(v6 ?
- TX_CSUM_TCPIP6 : TX_CSUM_TCPIP) |
- TXPKT_IPHDR_LEN_V(l3hdr_len);
+ cpl = write_tso_wr(adap, skb, lso);
+ cntrl = hwcsum(adap->params.chip, skb);
}
sgl = (u64 *)(cpl + 1); /* sgl start here */
if (unlikely((u8 *)sgl >= (u8 *)q->q.stat)) {
return NETDEV_TX_OK;
}
+/**
+ * reclaim_completed_tx_imm - reclaim completed control-queue Tx descs
+ * @q: the SGE control Tx queue
+ *
+ * This is a variant of cxgb4_reclaim_completed_tx() that is used
+ * for Tx queues that send only immediate data (presently just
+ * the control queues) and thus do not have any sk_buffs to release.
+ */
+static inline void reclaim_completed_tx_imm(struct sge_txq *q)
+{
+ int hw_cidx = ntohs(READ_ONCE(q->stat->cidx));
+ int reclaim = hw_cidx - q->cidx;
+
+ if (reclaim < 0)
+ reclaim += q->size;
+
+ q->in_use -= reclaim;
+ q->cidx = hw_cidx;
+}
+
static inline void eosw_txq_advance_index(u32 *idx, u32 n, u32 max)
{
u32 val = *idx + n;
}
}
+static inline void eosw_txq_advance(struct sge_eosw_txq *eosw_txq, u32 n)
+{
+ eosw_txq_advance_index(&eosw_txq->pidx, n, eosw_txq->ndesc);
+ eosw_txq->inuse += n;
+}
+
+static inline int eosw_txq_enqueue(struct sge_eosw_txq *eosw_txq,
+ struct sk_buff *skb)
+{
+ if (eosw_txq->inuse == eosw_txq->ndesc)
+ return -ENOMEM;
+
+ eosw_txq->desc[eosw_txq->pidx].skb = skb;
+ return 0;
+}
+
+static inline struct sk_buff *eosw_txq_peek(struct sge_eosw_txq *eosw_txq)
+{
+ return eosw_txq->desc[eosw_txq->last_pidx].skb;
+}
+
+static inline u8 ethofld_calc_tx_flits(struct adapter *adap,
+ struct sk_buff *skb, u32 hdr_len)
+{
+ u8 flits, nsgl = 0;
+ u32 wrlen;
+
+ wrlen = sizeof(struct fw_eth_tx_eo_wr) + sizeof(struct cpl_tx_pkt_core);
+ if (skb_shinfo(skb)->gso_size)
+ wrlen += sizeof(struct cpl_tx_pkt_lso_core);
+
+ wrlen += roundup(hdr_len, 16);
+
+ /* Packet headers + WR + CPLs */
+ flits = DIV_ROUND_UP(wrlen, 8);
+
+ if (skb_shinfo(skb)->nr_frags > 0)
+ nsgl = sgl_len(skb_shinfo(skb)->nr_frags);
+ else if (skb->len - hdr_len)
+ nsgl = sgl_len(1);
+
+ return flits + nsgl;
+}
+
+static inline void *write_eo_wr(struct adapter *adap,
+ struct sge_eosw_txq *eosw_txq,
+ struct sk_buff *skb, struct fw_eth_tx_eo_wr *wr,
+ u32 hdr_len, u32 wrlen)
+{
+ const struct skb_shared_info *ssi = skb_shinfo(skb);
+ struct cpl_tx_pkt_core *cpl;
+ u32 immd_len, wrlen16;
+ bool compl = false;
+
+ wrlen16 = DIV_ROUND_UP(wrlen, 16);
+ immd_len = sizeof(struct cpl_tx_pkt_core);
+ if (skb_shinfo(skb)->gso_size) {
+ if (skb->encapsulation &&
+ CHELSIO_CHIP_VERSION(adap->params.chip) > CHELSIO_T5)
+ immd_len += sizeof(struct cpl_tx_tnl_lso);
+ else
+ immd_len += sizeof(struct cpl_tx_pkt_lso_core);
+ }
+ immd_len += hdr_len;
+
+ if (!eosw_txq->ncompl ||
+ eosw_txq->last_compl >= adap->params.ofldq_wr_cred / 2) {
+ compl = true;
+ eosw_txq->ncompl++;
+ eosw_txq->last_compl = 0;
+ }
+
+ wr->op_immdlen = cpu_to_be32(FW_WR_OP_V(FW_ETH_TX_EO_WR) |
+ FW_ETH_TX_EO_WR_IMMDLEN_V(immd_len) |
+ FW_WR_COMPL_V(compl));
+ wr->equiq_to_len16 = cpu_to_be32(FW_WR_LEN16_V(wrlen16) |
+ FW_WR_FLOWID_V(eosw_txq->hwtid));
+ wr->r3 = 0;
+ wr->u.tcpseg.type = FW_ETH_TX_EO_TYPE_TCPSEG;
+ wr->u.tcpseg.ethlen = skb_network_offset(skb);
+ wr->u.tcpseg.iplen = cpu_to_be16(skb_network_header_len(skb));
+ wr->u.tcpseg.tcplen = tcp_hdrlen(skb);
+ wr->u.tcpseg.tsclk_tsoff = 0;
+ wr->u.tcpseg.r4 = 0;
+ wr->u.tcpseg.r5 = 0;
+ wr->u.tcpseg.plen = cpu_to_be32(skb->len - hdr_len);
+
+ if (ssi->gso_size) {
+ struct cpl_tx_pkt_lso_core *lso = (void *)(wr + 1);
+
+ wr->u.tcpseg.mss = cpu_to_be16(ssi->gso_size);
+ cpl = write_tso_wr(adap, skb, lso);
+ } else {
+ wr->u.tcpseg.mss = cpu_to_be16(0xffff);
+ cpl = (void *)(wr + 1);
+ }
+
+ eosw_txq->cred -= wrlen16;
+ eosw_txq->last_compl += wrlen16;
+ return cpl;
+}
+
+static void ethofld_hard_xmit(struct net_device *dev,
+ struct sge_eosw_txq *eosw_txq)
+{
+ struct port_info *pi = netdev2pinfo(dev);
+ struct adapter *adap = netdev2adap(dev);
+ u32 wrlen, wrlen16, hdr_len, data_len;
+ u64 cntrl, *start, *end, *sgl;
+ struct sge_eohw_txq *eohw_txq;
+ struct cpl_tx_pkt_core *cpl;
+ struct fw_eth_tx_eo_wr *wr;
+ struct sge_eosw_desc *d;
+ struct sk_buff *skb;
+ u8 flits, ndesc;
+ int left;
+
+ eohw_txq = &adap->sge.eohw_txq[eosw_txq->hwqid];
+ spin_lock(&eohw_txq->lock);
+ reclaim_completed_tx_imm(&eohw_txq->q);
+
+ d = &eosw_txq->desc[eosw_txq->last_pidx];
+ skb = d->skb;
+ skb_tx_timestamp(skb);
+
+ wr = (struct fw_eth_tx_eo_wr *)&eohw_txq->q.desc[eohw_txq->q.pidx];
+ hdr_len = eth_get_headlen(dev, skb->data, skb_headlen(skb));
+ data_len = skb->len - hdr_len;
+ flits = ethofld_calc_tx_flits(adap, skb, hdr_len);
+ ndesc = flits_to_desc(flits);
+ wrlen = flits * 8;
+ wrlen16 = DIV_ROUND_UP(wrlen, 16);
+
+ /* If there are no CPL credits, then wait for credits
+ * to come back and retry again
+ */
+ if (unlikely(wrlen16 > eosw_txq->cred))
+ goto out_unlock;
+
+ cpl = write_eo_wr(adap, eosw_txq, skb, wr, hdr_len, wrlen);
+ cntrl = hwcsum(adap->params.chip, skb);
+ if (skb_vlan_tag_present(skb))
+ cntrl |= TXPKT_VLAN_VLD_F | TXPKT_VLAN_V(skb_vlan_tag_get(skb));
+
+ cpl->ctrl0 = cpu_to_be32(TXPKT_OPCODE_V(CPL_TX_PKT_XT) |
+ TXPKT_INTF_V(pi->tx_chan) |
+ TXPKT_PF_V(adap->pf));
+ cpl->pack = 0;
+ cpl->len = cpu_to_be16(skb->len);
+ cpl->ctrl1 = cpu_to_be64(cntrl);
+
+ start = (u64 *)(cpl + 1);
+
+ sgl = (u64 *)inline_tx_skb_header(skb, &eohw_txq->q, (void *)start,
+ hdr_len);
+ if (data_len) {
+ if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, d->addr))) {
+ memset(d->addr, 0, sizeof(d->addr));
+ eohw_txq->mapping_err++;
+ goto out_unlock;
+ }
+
+ end = (u64 *)wr + flits;
+ if (unlikely(start > sgl)) {
+ left = (u8 *)end - (u8 *)eohw_txq->q.stat;
+ end = (void *)eohw_txq->q.desc + left;
+ }
+
+ if (unlikely((u8 *)sgl >= (u8 *)eohw_txq->q.stat)) {
+ /* If current position is already at the end of the
+ * txq, reset the current to point to start of the queue
+ * and update the end ptr as well.
+ */
+ left = (u8 *)end - (u8 *)eohw_txq->q.stat;
+
+ end = (void *)eohw_txq->q.desc + left;
+ sgl = (void *)eohw_txq->q.desc;
+ }
+
+ cxgb4_write_sgl(skb, &eohw_txq->q, (void *)sgl, end, hdr_len,
+ d->addr);
+ }
+
+ txq_advance(&eohw_txq->q, ndesc);
+ cxgb4_ring_tx_db(adap, &eohw_txq->q, ndesc);
+ eosw_txq_advance_index(&eosw_txq->last_pidx, 1, eosw_txq->ndesc);
+
+out_unlock:
+ spin_unlock(&eohw_txq->lock);
+}
+
+static void ethofld_xmit(struct net_device *dev, struct sge_eosw_txq *eosw_txq)
+{
+ struct sk_buff *skb;
+ int pktcount;
+
+ switch (eosw_txq->state) {
+ case CXGB4_EO_STATE_ACTIVE:
+ pktcount = eosw_txq->pidx - eosw_txq->last_pidx;
+ if (pktcount < 0)
+ pktcount += eosw_txq->ndesc;
+ break;
+ case CXGB4_EO_STATE_CLOSED:
+ default:
+ return;
+ };
+
+ while (pktcount--) {
+ skb = eosw_txq_peek(eosw_txq);
+ if (!skb) {
+ eosw_txq_advance_index(&eosw_txq->last_pidx, 1,
+ eosw_txq->ndesc);
+ continue;
+ }
+
+ ethofld_hard_xmit(dev, eosw_txq);
+ }
+}
+
static netdev_tx_t cxgb4_ethofld_xmit(struct sk_buff *skb,
struct net_device *dev)
{
+ struct cxgb4_tc_port_mqprio *tc_port_mqprio;
+ struct port_info *pi = netdev2pinfo(dev);
+ struct adapter *adap = netdev2adap(dev);
+ struct sge_eosw_txq *eosw_txq;
+ u32 qid;
int ret;
ret = cxgb4_validate_skb(skb, dev, ETH_HLEN);
if (ret)
goto out_free;
+ tc_port_mqprio = &adap->tc_mqprio->port_mqprio[pi->port_id];
+ qid = skb_get_queue_mapping(skb) - pi->nqsets;
+ eosw_txq = &tc_port_mqprio->eosw_txq[qid];
+ spin_lock_bh(&eosw_txq->lock);
+ if (eosw_txq->state != CXGB4_EO_STATE_ACTIVE)
+ goto out_unlock;
+
+ ret = eosw_txq_enqueue(eosw_txq, skb);
+ if (ret)
+ goto out_unlock;
+
+ /* SKB is queued for processing until credits are available.
+ * So, call the destructor now and we'll free the skb later
+ * after it has been successfully transmitted.
+ */
+ skb_orphan(skb);
+
+ eosw_txq_advance(eosw_txq, 1);
+ ethofld_xmit(dev, eosw_txq);
+ spin_unlock_bh(&eosw_txq->lock);
+ return NETDEV_TX_OK;
+
+out_unlock:
+ spin_unlock_bh(&eosw_txq->lock);
out_free:
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
return cxgb4_eth_xmit(skb, dev);
}
-/**
- * reclaim_completed_tx_imm - reclaim completed control-queue Tx descs
- * @q: the SGE control Tx queue
- *
- * This is a variant of cxgb4_reclaim_completed_tx() that is used
- * for Tx queues that send only immediate data (presently just
- * the control queues) and thus do not have any sk_buffs to release.
- */
-static inline void reclaim_completed_tx_imm(struct sge_txq *q)
-{
- int hw_cidx = ntohs(READ_ONCE(q->stat->cidx));
- int reclaim = hw_cidx - q->cidx;
-
- if (reclaim < 0)
- reclaim += q->size;
-
- q->in_use -= reclaim;
- q->cidx = hw_cidx;
-}
-
/**
* is_imm - check whether a packet can be sent as immediate data
* @skb: the packet
if (pktcount < 0)
pktcount += eosw_txq->ndesc;
- if (pktcount)
+ if (pktcount) {
cxgb4_eosw_txq_free_desc(netdev2adap(eosw_txq->netdev),
eosw_txq, pktcount);
+ eosw_txq->inuse -= pktcount;
+ }
+
+ /* There may be some packets waiting for completions. So,
+ * attempt to send these packets now.
+ */
+ ethofld_xmit(eosw_txq->netdev, eosw_txq);
spin_unlock(&eosw_txq->lock);
}
+/* cxgb4_ethofld_rx_handler - Process ETHOFLD Tx completions
+ * @q: the response queue that received the packet
+ * @rsp: the response queue descriptor holding the CPL message
+ * @si: the gather list of packet fragments
+ *
+ * Process a ETHOFLD Tx completion. Increment the cidx here, but
+ * free up the descriptors in a tasklet later.
+ */
+int cxgb4_ethofld_rx_handler(struct sge_rspq *q, const __be64 *rsp,
+ const struct pkt_gl *si)
+{
+ u8 opcode = ((const struct rss_header *)rsp)->opcode;
+
+ /* skip RSS header */
+ rsp++;
+
+ if (opcode == CPL_FW4_ACK) {
+ const struct cpl_fw4_ack *cpl;
+ struct sge_eosw_txq *eosw_txq;
+ struct eotid_entry *entry;
+ struct sk_buff *skb;
+ u32 hdr_len, eotid;
+ u8 flits, wrlen16;
+ int credits;
+
+ cpl = (const struct cpl_fw4_ack *)rsp;
+ eotid = CPL_FW4_ACK_FLOWID_G(ntohl(OPCODE_TID(cpl))) -
+ q->adap->tids.eotid_base;
+ entry = cxgb4_lookup_eotid(&q->adap->tids, eotid);
+ if (!entry)
+ goto out_done;
+
+ eosw_txq = (struct sge_eosw_txq *)entry->data;
+ if (!eosw_txq)
+ goto out_done;
+
+ spin_lock(&eosw_txq->lock);
+ credits = cpl->credits;
+ while (credits > 0) {
+ skb = eosw_txq->desc[eosw_txq->cidx].skb;
+ if (!skb)
+ break;
+
+ hdr_len = eth_get_headlen(eosw_txq->netdev, skb->data,
+ skb_headlen(skb));
+ flits = ethofld_calc_tx_flits(q->adap, skb, hdr_len);
+ eosw_txq_advance_index(&eosw_txq->cidx, 1,
+ eosw_txq->ndesc);
+ wrlen16 = DIV_ROUND_UP(flits * 8, 16);
+ credits -= wrlen16;
+ }
+
+ eosw_txq->cred += cpl->credits;
+ eosw_txq->ncompl--;
+
+ spin_unlock(&eosw_txq->lock);
+
+ /* Schedule a tasklet to reclaim SKBs and restart ETHOFLD Tx,
+ * if there were packets waiting for completion.
+ */
+ tasklet_schedule(&eosw_txq->qresume_tsk);
+ }
+
+out_done:
+ return 0;
+}
+
/*
* The MSI-X interrupt handler for an SGE response queue.
*/
projects / linux-2.6-block.git / commitdiff