From fe5f5787f0866e9f883bdd90018a354f2f3defd1 Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Tue, 1 Sep 2009 13:09:39 +0000 Subject: [PATCH] tg3: Add TSS support This patch exposes the additional transmit rings to the kernel and makes the necessary modifications to transmit, open, and close paths. Signed-off-by: Matt Carlson Reviewed-by: Benjamin Li Signed-off-by: David S. Miller --- drivers/net/tg3.c | 54 +++++++++++++++++++++++++++++++---------------- drivers/net/tg3.h | 1 + 2 files changed, 37 insertions(+), 18 deletions(-) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 53896541f7d2..2e0f4a50633f 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -704,11 +704,13 @@ static inline void tg3_netif_stop(struct tg3 *tp) static inline void tg3_netif_start(struct tg3 *tp) { struct tg3_napi *tnapi = &tp->napi[0]; - netif_wake_queue(tp->dev); - /* NOTE: unconditional netif_wake_queue is only appropriate - * so long as all callers are assured to have free tx slots - * (such as after tg3_init_hw) + + /* NOTE: unconditional netif_tx_wake_all_queues is only + * appropriate so long as all callers are assured to + * have free tx slots (such as after tg3_init_hw) */ + netif_tx_wake_all_queues(tp->dev); + napi_enable(&tnapi->napi); tnapi->hw_status->status |= SD_STATUS_UPDATED; tg3_enable_ints(tp); @@ -4294,6 +4296,13 @@ static void tg3_tx(struct tg3_napi *tnapi) struct tg3 *tp = tnapi->tp; u32 hw_idx = tnapi->hw_status->idx[0].tx_consumer; u32 sw_idx = tnapi->tx_cons; + struct netdev_queue *txq; + int index = tnapi - tp->napi; + + if (tp->tg3_flags2 & TG3_FLG2_USING_MSIX) + index--; + + txq = netdev_get_tx_queue(tp->dev, index); while (sw_idx != hw_idx) { struct tx_ring_info *ri = &tnapi->tx_buffers[sw_idx]; @@ -4335,13 +4344,13 @@ static void tg3_tx(struct tg3_napi *tnapi) */ smp_mb(); - if (unlikely(netif_queue_stopped(tp->dev) && + if (unlikely(netif_tx_queue_stopped(txq) && (tg3_tx_avail(tnapi) > TG3_TX_WAKEUP_THRESH(tnapi)))) { - netif_tx_lock(tp->dev); - if (netif_queue_stopped(tp->dev) && + __netif_tx_lock(txq, smp_processor_id()); + if (netif_tx_queue_stopped(txq) && (tg3_tx_avail(tnapi) > TG3_TX_WAKEUP_THRESH(tnapi))) - netif_wake_queue(tp->dev); - netif_tx_unlock(tp->dev); + netif_tx_wake_queue(txq); + __netif_tx_unlock(txq); } } @@ -5156,9 +5165,13 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, u32 len, entry, base_flags, mss; struct skb_shared_info *sp; dma_addr_t mapping; - struct tg3_napi *tnapi = &tp->napi[0]; + struct tg3_napi *tnapi; + struct netdev_queue *txq; - len = skb_headlen(skb); + txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); + tnapi = &tp->napi[skb_get_queue_mapping(skb)]; + if (tp->tg3_flags2 & TG3_FLG2_USING_MSIX) + tnapi++; /* We are running in BH disabled context with netif_tx_lock * and TX reclaim runs via tp->napi.poll inside of a software @@ -5166,8 +5179,8 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, * no IRQ context deadlocks to worry about either. Rejoice! */ if (unlikely(tg3_tx_avail(tnapi) <= (skb_shinfo(skb)->nr_frags + 1))) { - if (!netif_queue_stopped(dev)) { - netif_stop_queue(dev); + if (!netif_tx_queue_stopped(txq)) { + netif_tx_stop_queue(txq); /* This is a hard error, log it. */ printk(KERN_ERR PFX "%s: BUG! Tx Ring full when " @@ -5226,6 +5239,8 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, tnapi->tx_buffers[entry].skb = skb; + len = skb_headlen(skb); + tg3_set_txd(tnapi, entry, mapping, len, base_flags, (skb_shinfo(skb)->nr_frags == 0) | (mss << 1)); @@ -5255,9 +5270,9 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, tnapi->tx_prod = entry; if (unlikely(tg3_tx_avail(tnapi) <= (MAX_SKB_FRAGS + 1))) { - netif_stop_queue(dev); + netif_tx_stop_queue(txq); if (tg3_tx_avail(tnapi) > TG3_TX_WAKEUP_THRESH(tnapi)) - netif_wake_queue(tp->dev); + netif_tx_wake_queue(txq); } out_unlock: @@ -8047,6 +8062,8 @@ static bool tg3_enable_msix(struct tg3 *tp) for (i = 0; i < tp->irq_max; i++) tp->napi[i].irq_vec = msix_ent[i].vector; + tp->dev->real_num_tx_queues = tp->irq_cnt - 1; + return true; } @@ -8076,6 +8093,7 @@ static void tg3_ints_init(struct tg3 *tp) if (!(tp->tg3_flags2 & TG3_FLG2_USING_MSIX)) { tp->irq_cnt = 1; tp->napi[0].irq_vec = tp->pdev->irq; + tp->dev->real_num_tx_queues = 1; } } @@ -8211,7 +8229,7 @@ static int tg3_open(struct net_device *dev) tg3_full_unlock(tp); - netif_start_queue(dev); + netif_tx_start_all_queues(dev); return 0; @@ -8471,7 +8489,7 @@ static int tg3_close(struct net_device *dev) napi_disable(&tp->napi[0].napi); cancel_work_sync(&tp->reset_task); - netif_stop_queue(dev); + netif_tx_stop_all_queues(dev); del_timer_sync(&tp->timer); @@ -13560,7 +13578,7 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, goto err_out_free_res; } - dev = alloc_etherdev(sizeof(*tp)); + dev = alloc_etherdev_mq(sizeof(*tp), TG3_IRQ_MAX_VECS); if (!dev) { printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n"); err = -ENOMEM; diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h index 6452d48201e4..d1c7addd1d2d 100644 --- a/drivers/net/tg3.h +++ b/drivers/net/tg3.h @@ -822,6 +822,7 @@ #define SNDBDI_MODE_RESET 0x00000001 #define SNDBDI_MODE_ENABLE 0x00000002 #define SNDBDI_MODE_ATTN_ENABLE 0x00000004 +#define SNDBDI_MODE_MULTI_TXQ_EN 0x00000020 #define SNDBDI_STATUS 0x00001804 #define SNDBDI_STATUS_ERROR_ATTN 0x00000004 #define SNDBDI_IN_PROD_IDX_0 0x00001808 -- GitLab