Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Niranjana Vishwanathapura | 1123 | 88.70% | 4 | 25.00% |
Mike Marciniszyn | 55 | 4.34% | 3 | 18.75% |
Kaike Wan | 54 | 4.27% | 2 | 12.50% |
Dennis Dalessandro | 26 | 2.05% | 1 | 6.25% |
Jonathan Lemon | 3 | 0.24% | 1 | 6.25% |
Matthew Wilcox | 1 | 0.08% | 1 | 6.25% |
Brendan Cunningham | 1 | 0.08% | 1 | 6.25% |
caihuoqing | 1 | 0.08% | 1 | 6.25% |
Krzysztof Kozlowski | 1 | 0.08% | 1 | 6.25% |
Michael J. Ruhl | 1 | 0.08% | 1 | 6.25% |
Total | 1266 | 16 |
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* * Copyright(c) 2017 - 2018 Intel Corporation. */ /* * This file contains HFI1 support for VNIC SDMA functionality */ #include "sdma.h" #include "vnic.h" #define HFI1_VNIC_SDMA_Q_ACTIVE BIT(0) #define HFI1_VNIC_SDMA_Q_DEFERRED BIT(1) #define HFI1_VNIC_TXREQ_NAME_LEN 32 #define HFI1_VNIC_SDMA_DESC_WTRMRK 64 /* * struct vnic_txreq - VNIC transmit descriptor * @txreq: sdma transmit request * @sdma: vnic sdma pointer * @skb: skb to send * @pad: pad buffer * @plen: pad length * @pbc_val: pbc value */ struct vnic_txreq { struct sdma_txreq txreq; struct hfi1_vnic_sdma *sdma; struct sk_buff *skb; unsigned char pad[HFI1_VNIC_MAX_PAD]; u16 plen; __le64 pbc_val; }; static void vnic_sdma_complete(struct sdma_txreq *txreq, int status) { struct vnic_txreq *tx = container_of(txreq, struct vnic_txreq, txreq); struct hfi1_vnic_sdma *vnic_sdma = tx->sdma; sdma_txclean(vnic_sdma->dd, txreq); dev_kfree_skb_any(tx->skb); kmem_cache_free(vnic_sdma->dd->vnic.txreq_cache, tx); } static noinline int build_vnic_ulp_payload(struct sdma_engine *sde, struct vnic_txreq *tx) { int i, ret = 0; ret = sdma_txadd_kvaddr( sde->dd, &tx->txreq, tx->skb->data, skb_headlen(tx->skb)); if (unlikely(ret)) goto bail_txadd; for (i = 0; i < skb_shinfo(tx->skb)->nr_frags; i++) { skb_frag_t *frag = &skb_shinfo(tx->skb)->frags[i]; /* combine physically continuous fragments later? */ ret = sdma_txadd_page(sde->dd, &tx->txreq, skb_frag_page(frag), skb_frag_off(frag), skb_frag_size(frag), NULL, NULL, NULL); if (unlikely(ret)) goto bail_txadd; } if (tx->plen) ret = sdma_txadd_kvaddr(sde->dd, &tx->txreq, tx->pad + HFI1_VNIC_MAX_PAD - tx->plen, tx->plen); bail_txadd: return ret; } static int build_vnic_tx_desc(struct sdma_engine *sde, struct vnic_txreq *tx, u64 pbc) { int ret = 0; u16 hdrbytes = 2 << 2; /* PBC */ ret = sdma_txinit_ahg( &tx->txreq, 0, hdrbytes + tx->skb->len + tx->plen, 0, 0, NULL, 0, vnic_sdma_complete); if (unlikely(ret)) goto bail_txadd; /* add pbc */ tx->pbc_val = cpu_to_le64(pbc); ret = sdma_txadd_kvaddr( sde->dd, &tx->txreq, &tx->pbc_val, hdrbytes); if (unlikely(ret)) goto bail_txadd; /* add the ulp payload */ ret = build_vnic_ulp_payload(sde, tx); bail_txadd: return ret; } /* setup the last plen bypes of pad */ static inline void hfi1_vnic_update_pad(unsigned char *pad, u8 plen) { pad[HFI1_VNIC_MAX_PAD - 1] = plen - OPA_VNIC_ICRC_TAIL_LEN; } int hfi1_vnic_send_dma(struct hfi1_devdata *dd, u8 q_idx, struct hfi1_vnic_vport_info *vinfo, struct sk_buff *skb, u64 pbc, u8 plen) { struct hfi1_vnic_sdma *vnic_sdma = &vinfo->sdma[q_idx]; struct sdma_engine *sde = vnic_sdma->sde; struct vnic_txreq *tx; int ret = -ECOMM; if (unlikely(READ_ONCE(vnic_sdma->state) != HFI1_VNIC_SDMA_Q_ACTIVE)) goto tx_err; if (unlikely(!sde || !sdma_running(sde))) goto tx_err; tx = kmem_cache_alloc(dd->vnic.txreq_cache, GFP_ATOMIC); if (unlikely(!tx)) { ret = -ENOMEM; goto tx_err; } tx->sdma = vnic_sdma; tx->skb = skb; hfi1_vnic_update_pad(tx->pad, plen); tx->plen = plen; ret = build_vnic_tx_desc(sde, tx, pbc); if (unlikely(ret)) goto free_desc; ret = sdma_send_txreq(sde, iowait_get_ib_work(&vnic_sdma->wait), &tx->txreq, vnic_sdma->pkts_sent); /* When -ECOMM, sdma callback will be called with ABORT status */ if (unlikely(ret && unlikely(ret != -ECOMM))) goto free_desc; if (!ret) { vnic_sdma->pkts_sent = true; iowait_starve_clear(vnic_sdma->pkts_sent, &vnic_sdma->wait); } return ret; free_desc: sdma_txclean(dd, &tx->txreq); kmem_cache_free(dd->vnic.txreq_cache, tx); tx_err: if (ret != -EBUSY) dev_kfree_skb_any(skb); else vnic_sdma->pkts_sent = false; return ret; } /* * hfi1_vnic_sdma_sleep - vnic sdma sleep function * * This function gets called from sdma_send_txreq() when there are not enough * sdma descriptors available to send the packet. It adds Tx queue's wait * structure to sdma engine's dmawait list to be woken up when descriptors * become available. */ static int hfi1_vnic_sdma_sleep(struct sdma_engine *sde, struct iowait_work *wait, struct sdma_txreq *txreq, uint seq, bool pkts_sent) { struct hfi1_vnic_sdma *vnic_sdma = container_of(wait->iow, struct hfi1_vnic_sdma, wait); write_seqlock(&sde->waitlock); if (sdma_progress(sde, seq, txreq)) { write_sequnlock(&sde->waitlock); return -EAGAIN; } vnic_sdma->state = HFI1_VNIC_SDMA_Q_DEFERRED; if (list_empty(&vnic_sdma->wait.list)) { iowait_get_priority(wait->iow); iowait_queue(pkts_sent, wait->iow, &sde->dmawait); } write_sequnlock(&sde->waitlock); return -EBUSY; } /* * hfi1_vnic_sdma_wakeup - vnic sdma wakeup function * * This function gets called when SDMA descriptors becomes available and Tx * queue's wait structure was previously added to sdma engine's dmawait list. * It notifies the upper driver about Tx queue wakeup. */ static void hfi1_vnic_sdma_wakeup(struct iowait *wait, int reason) { struct hfi1_vnic_sdma *vnic_sdma = container_of(wait, struct hfi1_vnic_sdma, wait); struct hfi1_vnic_vport_info *vinfo = vnic_sdma->vinfo; vnic_sdma->state = HFI1_VNIC_SDMA_Q_ACTIVE; if (__netif_subqueue_stopped(vinfo->netdev, vnic_sdma->q_idx)) netif_wake_subqueue(vinfo->netdev, vnic_sdma->q_idx); }; inline bool hfi1_vnic_sdma_write_avail(struct hfi1_vnic_vport_info *vinfo, u8 q_idx) { struct hfi1_vnic_sdma *vnic_sdma = &vinfo->sdma[q_idx]; return (READ_ONCE(vnic_sdma->state) == HFI1_VNIC_SDMA_Q_ACTIVE); } void hfi1_vnic_sdma_init(struct hfi1_vnic_vport_info *vinfo) { int i; for (i = 0; i < vinfo->num_tx_q; i++) { struct hfi1_vnic_sdma *vnic_sdma = &vinfo->sdma[i]; iowait_init(&vnic_sdma->wait, 0, NULL, NULL, hfi1_vnic_sdma_sleep, hfi1_vnic_sdma_wakeup, NULL, NULL); vnic_sdma->sde = &vinfo->dd->per_sdma[i]; vnic_sdma->dd = vinfo->dd; vnic_sdma->vinfo = vinfo; vnic_sdma->q_idx = i; vnic_sdma->state = HFI1_VNIC_SDMA_Q_ACTIVE; /* Add a free descriptor watermark for wakeups */ if (vnic_sdma->sde->descq_cnt > HFI1_VNIC_SDMA_DESC_WTRMRK) { struct iowait_work *work; INIT_LIST_HEAD(&vnic_sdma->stx.list); vnic_sdma->stx.num_desc = HFI1_VNIC_SDMA_DESC_WTRMRK; work = iowait_get_ib_work(&vnic_sdma->wait); list_add_tail(&vnic_sdma->stx.list, &work->tx_head); } } } int hfi1_vnic_txreq_init(struct hfi1_devdata *dd) { char buf[HFI1_VNIC_TXREQ_NAME_LEN]; snprintf(buf, sizeof(buf), "hfi1_%u_vnic_txreq_cache", dd->unit); dd->vnic.txreq_cache = kmem_cache_create(buf, sizeof(struct vnic_txreq), 0, SLAB_HWCACHE_ALIGN, NULL); if (!dd->vnic.txreq_cache) return -ENOMEM; return 0; } void hfi1_vnic_txreq_deinit(struct hfi1_devdata *dd) { kmem_cache_destroy(dd->vnic.txreq_cache); dd->vnic.txreq_cache = NULL; }
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