diff options
author | Tobias Regnery <tobias.regnery@gmail.com> | 2016-11-15 12:43:11 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-11-15 22:46:30 -0500 |
commit | 702e84185f472457912c641d8c0cc0cc786310eb (patch) | |
tree | 9498776c1f0a58206a0e3b808e33d0c16b577006 /drivers | |
parent | b0999223f224187318c67f1de653e34fb1f04f6b (diff) | |
download | linux-702e84185f472457912c641d8c0cc0cc786310eb.tar.bz2 |
alx: switch to per queue data structures
Remove the tx and rx queue structures from the alx_priv structure and switch
everything over to the queue pointers in the alx_napi structure.
Based on the downstream driver at github.com/qca/alx
Signed-off-by: Tobias Regnery <tobias.regnery@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ethernet/atheros/alx/alx.h | 5 | ||||
-rw-r--r-- | drivers/net/ethernet/atheros/alx/main.c | 183 |
2 files changed, 93 insertions, 95 deletions
diff --git a/drivers/net/ethernet/atheros/alx/alx.h b/drivers/net/ethernet/atheros/alx/alx.h index 0859053525de..d4a409139ea2 100644 --- a/drivers/net/ethernet/atheros/alx/alx.h +++ b/drivers/net/ethernet/atheros/alx/alx.h @@ -113,7 +113,6 @@ struct alx_priv { /* msi-x vectors */ int num_vec; struct msix_entry *msix_entries; - char irq_lbl[IFNAMSIZ + 8]; /* all descriptor memory */ struct { @@ -135,10 +134,6 @@ struct alx_priv { unsigned int rx_ringsz; unsigned int rxbuf_size; - struct napi_struct napi; - struct alx_tx_queue txq; - struct alx_rx_queue rxq; - struct work_struct link_check_wk; struct work_struct reset_wk; diff --git a/drivers/net/ethernet/atheros/alx/main.c b/drivers/net/ethernet/atheros/alx/main.c index 193da6799979..a9fc44611b8a 100644 --- a/drivers/net/ethernet/atheros/alx/main.c +++ b/drivers/net/ethernet/atheros/alx/main.c @@ -55,12 +55,12 @@ static bool msix = false; module_param(msix, bool, 0); MODULE_PARM_DESC(msix, "Enable msi-x interrupt support"); -static void alx_free_txbuf(struct alx_priv *alx, int entry) +static void alx_free_txbuf(struct alx_tx_queue *txq, int entry) { - struct alx_buffer *txb = &alx->txq.bufs[entry]; + struct alx_buffer *txb = &txq->bufs[entry]; if (dma_unmap_len(txb, size)) { - dma_unmap_single(&alx->hw.pdev->dev, + dma_unmap_single(txq->dev, dma_unmap_addr(txb, dma), dma_unmap_len(txb, size), DMA_TO_DEVICE); @@ -75,7 +75,7 @@ static void alx_free_txbuf(struct alx_priv *alx, int entry) static int alx_refill_rx_ring(struct alx_priv *alx, gfp_t gfp) { - struct alx_rx_queue *rxq = &alx->rxq; + struct alx_rx_queue *rxq = alx->qnapi[0]->rxq; struct sk_buff *skb; struct alx_buffer *cur_buf; dma_addr_t dma; @@ -143,22 +143,22 @@ static int alx_refill_rx_ring(struct alx_priv *alx, gfp_t gfp) return count; } -static inline int alx_tpd_avail(struct alx_priv *alx) +static inline int alx_tpd_avail(struct alx_tx_queue *txq) { - struct alx_tx_queue *txq = &alx->txq; - if (txq->write_idx >= txq->read_idx) - return alx->tx_ringsz + txq->read_idx - txq->write_idx - 1; + return txq->count + txq->read_idx - txq->write_idx - 1; return txq->read_idx - txq->write_idx - 1; } -static bool alx_clean_tx_irq(struct alx_priv *alx) +static bool alx_clean_tx_irq(struct alx_tx_queue *txq) { - struct alx_tx_queue *txq = &alx->txq; + struct alx_priv *alx; u16 hw_read_idx, sw_read_idx; unsigned int total_bytes = 0, total_packets = 0; int budget = ALX_DEFAULT_TX_WORK; + alx = netdev_priv(txq->netdev); + sw_read_idx = txq->read_idx; hw_read_idx = alx_read_mem16(&alx->hw, ALX_TPD_PRI0_CIDX); @@ -173,19 +173,19 @@ static bool alx_clean_tx_irq(struct alx_priv *alx) budget--; } - alx_free_txbuf(alx, sw_read_idx); + alx_free_txbuf(txq, sw_read_idx); - if (++sw_read_idx == alx->tx_ringsz) + if (++sw_read_idx == txq->count) sw_read_idx = 0; } txq->read_idx = sw_read_idx; - netdev_completed_queue(alx->dev, total_packets, total_bytes); + netdev_completed_queue(txq->netdev, total_packets, total_bytes); } - if (netif_queue_stopped(alx->dev) && netif_carrier_ok(alx->dev) && - alx_tpd_avail(alx) > alx->tx_ringsz/4) - netif_wake_queue(alx->dev); + if (netif_queue_stopped(txq->netdev) && netif_carrier_ok(txq->netdev) && + alx_tpd_avail(txq) > txq->count / 4) + netif_wake_queue(txq->netdev); return sw_read_idx == hw_read_idx; } @@ -200,15 +200,17 @@ static void alx_schedule_reset(struct alx_priv *alx) schedule_work(&alx->reset_wk); } -static int alx_clean_rx_irq(struct alx_priv *alx, int budget) +static int alx_clean_rx_irq(struct alx_rx_queue *rxq, int budget) { - struct alx_rx_queue *rxq = &alx->rxq; + struct alx_priv *alx; struct alx_rrd *rrd; struct alx_buffer *rxb; struct sk_buff *skb; u16 length, rfd_cleaned = 0; int work = 0; + alx = netdev_priv(rxq->netdev); + while (work < budget) { rrd = &rxq->rrd[rxq->rrd_read_idx]; if (!(rrd->word3 & cpu_to_le32(1 << RRD_UPDATED_SHIFT))) @@ -224,7 +226,7 @@ static int alx_clean_rx_irq(struct alx_priv *alx, int budget) } rxb = &rxq->bufs[rxq->read_idx]; - dma_unmap_single(&alx->hw.pdev->dev, + dma_unmap_single(rxq->dev, dma_unmap_addr(rxb, dma), dma_unmap_len(rxb, size), DMA_FROM_DEVICE); @@ -242,7 +244,7 @@ static int alx_clean_rx_irq(struct alx_priv *alx, int budget) length = ALX_GET_FIELD(le32_to_cpu(rrd->word3), RRD_PKTLEN) - ETH_FCS_LEN; skb_put(skb, length); - skb->protocol = eth_type_trans(skb, alx->dev); + skb->protocol = eth_type_trans(skb, rxq->netdev); skb_checksum_none_assert(skb); if (alx->dev->features & NETIF_F_RXCSUM && @@ -259,13 +261,13 @@ static int alx_clean_rx_irq(struct alx_priv *alx, int budget) } } - napi_gro_receive(&alx->napi, skb); + napi_gro_receive(&rxq->np->napi, skb); work++; next_pkt: - if (++rxq->read_idx == alx->rx_ringsz) + if (++rxq->read_idx == rxq->count) rxq->read_idx = 0; - if (++rxq->rrd_read_idx == alx->rx_ringsz) + if (++rxq->rrd_read_idx == rxq->count) rxq->rrd_read_idx = 0; if (++rfd_cleaned > ALX_RX_ALLOC_THRESH) @@ -280,19 +282,20 @@ next_pkt: static int alx_poll(struct napi_struct *napi, int budget) { - struct alx_priv *alx = container_of(napi, struct alx_priv, napi); + struct alx_napi *np = container_of(napi, struct alx_napi, napi); + struct alx_priv *alx = np->alx; struct alx_hw *hw = &alx->hw; unsigned long flags; bool tx_complete; int work; - tx_complete = alx_clean_tx_irq(alx); - work = alx_clean_rx_irq(alx, budget); + tx_complete = alx_clean_tx_irq(np->txq); + work = alx_clean_rx_irq(np->rxq, budget); if (!tx_complete || work == budget) return budget; - napi_complete(&alx->napi); + napi_complete(&np->napi); /* enable interrupt */ if (alx->flags & ALX_FLAG_USING_MSIX) { @@ -350,7 +353,7 @@ static irqreturn_t alx_intr_handle(struct alx_priv *alx, u32 intr) goto out; if (intr & (ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0)) { - napi_schedule(&alx->napi); + napi_schedule(&alx->qnapi[0]->napi); /* mask rx/tx interrupt, enable them when napi complete */ alx->int_mask &= ~ALX_ISR_ALL_QUEUES; alx_write_mem32(hw, ALX_IMR, alx->int_mask); @@ -365,15 +368,15 @@ static irqreturn_t alx_intr_handle(struct alx_priv *alx, u32 intr) static irqreturn_t alx_intr_msix_ring(int irq, void *data) { - struct alx_priv *alx = data; - struct alx_hw *hw = &alx->hw; + struct alx_napi *np = data; + struct alx_hw *hw = &np->alx->hw; /* mask interrupt to ACK chip */ alx_mask_msix(hw, 1, true); /* clear interrupt status */ alx_write_mem32(hw, ALX_ISR, (ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0)); - napi_schedule(&alx->napi); + napi_schedule(&np->napi); return IRQ_HANDLED; } @@ -428,59 +431,58 @@ static void alx_init_ring_ptrs(struct alx_priv *alx) { struct alx_hw *hw = &alx->hw; u32 addr_hi = ((u64)alx->descmem.dma) >> 32; + struct alx_napi *np = alx->qnapi[0]; - alx->rxq.read_idx = 0; - alx->rxq.write_idx = 0; - alx->rxq.rrd_read_idx = 0; + np->rxq->read_idx = 0; + np->rxq->write_idx = 0; + np->rxq->rrd_read_idx = 0; alx_write_mem32(hw, ALX_RX_BASE_ADDR_HI, addr_hi); - alx_write_mem32(hw, ALX_RRD_ADDR_LO, alx->rxq.rrd_dma); + alx_write_mem32(hw, ALX_RRD_ADDR_LO, np->rxq->rrd_dma); alx_write_mem32(hw, ALX_RRD_RING_SZ, alx->rx_ringsz); - alx_write_mem32(hw, ALX_RFD_ADDR_LO, alx->rxq.rfd_dma); + alx_write_mem32(hw, ALX_RFD_ADDR_LO, np->rxq->rfd_dma); alx_write_mem32(hw, ALX_RFD_RING_SZ, alx->rx_ringsz); alx_write_mem32(hw, ALX_RFD_BUF_SZ, alx->rxbuf_size); - alx->txq.read_idx = 0; - alx->txq.write_idx = 0; + np->txq->read_idx = 0; + np->txq->write_idx = 0; alx_write_mem32(hw, ALX_TX_BASE_ADDR_HI, addr_hi); - alx_write_mem32(hw, ALX_TPD_PRI0_ADDR_LO, alx->txq.tpd_dma); + alx_write_mem32(hw, ALX_TPD_PRI0_ADDR_LO, np->txq->tpd_dma); alx_write_mem32(hw, ALX_TPD_RING_SZ, alx->tx_ringsz); /* load these pointers into the chip */ alx_write_mem32(hw, ALX_SRAM9, ALX_SRAM_LOAD_PTR); } -static void alx_free_txring_buf(struct alx_priv *alx) +static void alx_free_txring_buf(struct alx_tx_queue *txq) { - struct alx_tx_queue *txq = &alx->txq; int i; if (!txq->bufs) return; - for (i = 0; i < alx->tx_ringsz; i++) - alx_free_txbuf(alx, i); + for (i = 0; i < txq->count; i++) + alx_free_txbuf(txq, i); - memset(txq->bufs, 0, alx->tx_ringsz * sizeof(struct alx_buffer)); - memset(txq->tpd, 0, alx->tx_ringsz * sizeof(struct alx_txd)); + memset(txq->bufs, 0, txq->count * sizeof(struct alx_buffer)); + memset(txq->tpd, 0, txq->count * sizeof(struct alx_txd)); txq->write_idx = 0; txq->read_idx = 0; - netdev_reset_queue(alx->dev); + netdev_reset_queue(txq->netdev); } -static void alx_free_rxring_buf(struct alx_priv *alx) +static void alx_free_rxring_buf(struct alx_rx_queue *rxq) { - struct alx_rx_queue *rxq = &alx->rxq; struct alx_buffer *cur_buf; u16 i; if (rxq == NULL) return; - for (i = 0; i < alx->rx_ringsz; i++) { + for (i = 0; i < rxq->count; i++) { cur_buf = rxq->bufs + i; if (cur_buf->skb) { - dma_unmap_single(&alx->hw.pdev->dev, + dma_unmap_single(rxq->dev, dma_unmap_addr(cur_buf, dma), dma_unmap_len(cur_buf, size), DMA_FROM_DEVICE); @@ -498,8 +500,8 @@ static void alx_free_rxring_buf(struct alx_priv *alx) static void alx_free_buffers(struct alx_priv *alx) { - alx_free_txring_buf(alx); - alx_free_rxring_buf(alx); + alx_free_txring_buf(alx->qnapi[0]->txq); + alx_free_rxring_buf(alx->qnapi[0]->rxq); } static int alx_reinit_rings(struct alx_priv *alx) @@ -576,13 +578,13 @@ static int alx_set_mac_address(struct net_device *netdev, void *data) static int alx_alloc_tx_ring(struct alx_priv *alx, struct alx_tx_queue *txq, int offset) { - txq->bufs = kcalloc(alx->tx_ringsz, sizeof(struct alx_buffer), GFP_KERNEL); + txq->bufs = kcalloc(txq->count, sizeof(struct alx_buffer), GFP_KERNEL); if (!txq->bufs) return -ENOMEM; txq->tpd = alx->descmem.virt + offset; txq->tpd_dma = alx->descmem.dma + offset; - offset += sizeof(struct alx_txd) * alx->tx_ringsz; + offset += sizeof(struct alx_txd) * txq->count; return offset; } @@ -590,17 +592,17 @@ static int alx_alloc_tx_ring(struct alx_priv *alx, struct alx_tx_queue *txq, static int alx_alloc_rx_ring(struct alx_priv *alx, struct alx_rx_queue *rxq, int offset) { - rxq->bufs = kcalloc(alx->rx_ringsz, sizeof(struct alx_buffer), GFP_KERNEL); + rxq->bufs = kcalloc(rxq->count, sizeof(struct alx_buffer), GFP_KERNEL); if (!rxq->bufs) return -ENOMEM; rxq->rrd = alx->descmem.virt + offset; rxq->rrd_dma = alx->descmem.dma + offset; - offset += sizeof(struct alx_rrd) * alx->rx_ringsz; + offset += sizeof(struct alx_rrd) * rxq->count; rxq->rfd = alx->descmem.virt + offset; rxq->rfd_dma = alx->descmem.dma + offset; - offset += sizeof(struct alx_rfd) * alx->rx_ringsz; + offset += sizeof(struct alx_rfd) * rxq->count; return offset; } @@ -629,13 +631,13 @@ static int alx_alloc_rings(struct alx_priv *alx) BUILD_BUG_ON(sizeof(struct alx_txd) % 8); BUILD_BUG_ON(sizeof(struct alx_rrd) % 8); - offset = alx_alloc_tx_ring(alx, &alx->txq, offset); + offset = alx_alloc_tx_ring(alx, alx->qnapi[0]->txq, offset); if (offset < 0) { netdev_err(alx->dev, "Allocation of tx buffer failed!\n"); return -ENOMEM; } - offset = alx_alloc_rx_ring(alx, &alx->rxq, offset); + offset = alx_alloc_rx_ring(alx, alx->qnapi[0]->rxq, offset); if (offset < 0) { netdev_err(alx->dev, "Allocation of rx buffer failed!\n"); return -ENOMEM; @@ -648,10 +650,11 @@ static int alx_alloc_rings(struct alx_priv *alx) static void alx_free_rings(struct alx_priv *alx) { + alx_free_buffers(alx); - kfree(alx->txq.bufs); - kfree(alx->rxq.bufs); + kfree(alx->qnapi[0]->txq->bufs); + kfree(alx->qnapi[0]->rxq->bufs); if (!alx->descmem.virt) dma_free_coherent(&alx->hw.pdev->dev, @@ -668,7 +671,7 @@ static void alx_free_napis(struct alx_priv *alx) if (!np) return; - netif_napi_del(&alx->napi); + netif_napi_del(&np->napi); kfree(np->txq); kfree(np->rxq); kfree(np); @@ -690,7 +693,7 @@ static int alx_alloc_napis(struct alx_priv *alx) goto err_out; np->alx = alx; - netif_napi_add(alx->dev, &alx->napi, alx_poll, 64); + netif_napi_add(alx->dev, &np->napi, alx_poll, 64); alx->qnapi[0] = np; /* allocate tx queues */ @@ -768,6 +771,7 @@ static int alx_request_msix(struct alx_priv *alx) { struct net_device *netdev = alx->dev; int i, err, vector = 0, free_vector = 0; + struct alx_napi *np = alx->qnapi[0]; err = request_irq(alx->msix_entries[0].vector, alx_intr_msix_misc, 0, netdev->name, alx); @@ -775,10 +779,10 @@ static int alx_request_msix(struct alx_priv *alx) goto out_err; vector++; - sprintf(alx->irq_lbl, "%s-TxRx-0", netdev->name); + sprintf(np->irq_lbl, "%s-TxRx-0", netdev->name); err = request_irq(alx->msix_entries[vector].vector, - alx_intr_msix_ring, 0, alx->irq_lbl, alx); + alx_intr_msix_ring, 0, np->irq_lbl, np); if (err) goto out_free; @@ -789,7 +793,7 @@ out_free: vector--; for (i = 0; i < vector; i++) - free_irq(alx->msix_entries[free_vector++].vector, alx); + free_irq(alx->msix_entries[free_vector++].vector, alx->qnapi[0]); out_err: return err; @@ -905,12 +909,12 @@ out: static void alx_free_irq(struct alx_priv *alx) { struct pci_dev *pdev = alx->hw.pdev; - int i; + int i, vector = 0; if (alx->flags & ALX_FLAG_USING_MSIX) { /* we have only 2 vectors without multi queue support */ - for (i = 0; i < 2; i++) - free_irq(alx->msix_entries[i].vector, alx); + free_irq(alx->msix_entries[vector++].vector, alx); + free_irq(alx->msix_entries[vector++].vector, alx->qnapi[0]); } else { free_irq(pdev->irq, alx); } @@ -999,7 +1003,7 @@ static void alx_netif_stop(struct alx_priv *alx) if (netif_carrier_ok(alx->dev)) { netif_carrier_off(alx->dev); netif_tx_disable(alx->dev); - napi_disable(&alx->napi); + napi_disable(&alx->qnapi[0]->napi); } } @@ -1069,7 +1073,7 @@ static int alx_change_mtu(struct net_device *netdev, int mtu) static void alx_netif_start(struct alx_priv *alx) { netif_tx_wake_all_queues(alx->dev); - napi_enable(&alx->napi); + napi_enable(&alx->qnapi[0]->napi); netif_carrier_on(alx->dev); } @@ -1303,9 +1307,8 @@ static int alx_tso(struct sk_buff *skb, struct alx_txd *first) return 1; } -static int alx_map_tx_skb(struct alx_priv *alx, struct sk_buff *skb) +static int alx_map_tx_skb(struct alx_tx_queue *txq, struct sk_buff *skb) { - struct alx_tx_queue *txq = &alx->txq; struct alx_txd *tpd, *first_tpd; dma_addr_t dma; int maplen, f, first_idx = txq->write_idx; @@ -1314,7 +1317,7 @@ static int alx_map_tx_skb(struct alx_priv *alx, struct sk_buff *skb) tpd = first_tpd; if (tpd->word1 & (1 << TPD_LSO_V2_SHIFT)) { - if (++txq->write_idx == alx->tx_ringsz) + if (++txq->write_idx == txq->count) txq->write_idx = 0; tpd = &txq->tpd[txq->write_idx]; @@ -1324,9 +1327,9 @@ static int alx_map_tx_skb(struct alx_priv *alx, struct sk_buff *skb) } maplen = skb_headlen(skb); - dma = dma_map_single(&alx->hw.pdev->dev, skb->data, maplen, + dma = dma_map_single(txq->dev, skb->data, maplen, DMA_TO_DEVICE); - if (dma_mapping_error(&alx->hw.pdev->dev, dma)) + if (dma_mapping_error(txq->dev, dma)) goto err_dma; dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen); @@ -1340,16 +1343,16 @@ static int alx_map_tx_skb(struct alx_priv *alx, struct sk_buff *skb) frag = &skb_shinfo(skb)->frags[f]; - if (++txq->write_idx == alx->tx_ringsz) + if (++txq->write_idx == txq->count) txq->write_idx = 0; tpd = &txq->tpd[txq->write_idx]; tpd->word1 = first_tpd->word1; maplen = skb_frag_size(frag); - dma = skb_frag_dma_map(&alx->hw.pdev->dev, frag, 0, + dma = skb_frag_dma_map(txq->dev, frag, 0, maplen, DMA_TO_DEVICE); - if (dma_mapping_error(&alx->hw.pdev->dev, dma)) + if (dma_mapping_error(txq->dev, dma)) goto err_dma; dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen); dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma); @@ -1362,7 +1365,7 @@ static int alx_map_tx_skb(struct alx_priv *alx, struct sk_buff *skb) tpd->word1 |= cpu_to_le32(1 << TPD_EOP_SHIFT); txq->bufs[txq->write_idx].skb = skb; - if (++txq->write_idx == alx->tx_ringsz) + if (++txq->write_idx == txq->count) txq->write_idx = 0; return 0; @@ -1370,8 +1373,8 @@ static int alx_map_tx_skb(struct alx_priv *alx, struct sk_buff *skb) err_dma: f = first_idx; while (f != txq->write_idx) { - alx_free_txbuf(alx, f); - if (++f == alx->tx_ringsz) + alx_free_txbuf(txq, f); + if (++f == txq->count) f = 0; } return -ENOMEM; @@ -1381,12 +1384,12 @@ static netdev_tx_t alx_start_xmit(struct sk_buff *skb, struct net_device *netdev) { struct alx_priv *alx = netdev_priv(netdev); - struct alx_tx_queue *txq = &alx->txq; + struct alx_tx_queue *txq = alx->qnapi[0]->txq; struct alx_txd *first; int tso; - if (alx_tpd_avail(alx) < alx_tpd_req(skb)) { - netif_stop_queue(alx->dev); + if (alx_tpd_avail(txq) < alx_tpd_req(skb)) { + netif_stop_queue(txq->netdev); goto drop; } @@ -1399,17 +1402,17 @@ static netdev_tx_t alx_start_xmit(struct sk_buff *skb, else if (!tso && alx_tx_csum(skb, first)) goto drop; - if (alx_map_tx_skb(alx, skb) < 0) + if (alx_map_tx_skb(txq, skb) < 0) goto drop; - netdev_sent_queue(alx->dev, skb->len); + netdev_sent_queue(txq->netdev, skb->len); /* flush updates before updating hardware */ wmb(); alx_write_mem16(&alx->hw, ALX_TPD_PRI0_PIDX, txq->write_idx); - if (alx_tpd_avail(alx) < alx->tx_ringsz/8) - netif_stop_queue(alx->dev); + if (alx_tpd_avail(txq) < txq->count / 8) + netif_stop_queue(txq->netdev); return NETDEV_TX_OK; @@ -1478,7 +1481,7 @@ static void alx_poll_controller(struct net_device *netdev) if (alx->flags & ALX_FLAG_USING_MSIX) { alx_intr_msix_misc(0, alx); - alx_intr_msix_ring(0, alx); + alx_intr_msix_ring(0, alx->qnapi[0]); } else if (alx->flags & ALX_FLAG_USING_MSI) alx_intr_msi(0, alx); else |