From 35f2d7d0d7c222a580da0ed91c8d70c54267620a Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Fri, 13 Nov 2009 13:03:41 +0000 Subject: [PATCH] tg3: Create tg3_poll_msix() for non-zero MSIX vecs This patch gives all non-zero MSIX vectors their own NAPI handler. This will make NAPI handling for those vectors slightly more efficient. Signed-off-by: Matt Carlson Reviewed-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/tg3.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 60 insertions(+), 8 deletions(-) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 1c1cf68..5e17abb 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -4706,18 +4706,17 @@ next_pkt_nopost: return received; } -static int tg3_poll_work(struct tg3_napi *tnapi, int work_done, int budget) +static void tg3_poll_link(struct tg3 *tp) { - struct tg3 *tp = tnapi->tp; - struct tg3_hw_status *sblk = tnapi->hw_status; - /* handle link change and other phy events */ if (!(tp->tg3_flags & (TG3_FLAG_USE_LINKCHG_REG | TG3_FLAG_POLL_SERDES))) { + struct tg3_hw_status *sblk = tp->napi[0].hw_status; + if (sblk->status & SD_STATUS_LINK_CHG) { sblk->status = SD_STATUS_UPDATED | - (sblk->status & ~SD_STATUS_LINK_CHG); + (sblk->status & ~SD_STATUS_LINK_CHG); spin_lock(&tp->lock); if (tp->tg3_flags3 & TG3_FLG3_USE_PHYLIB) { tw32_f(MAC_STATUS, @@ -4731,6 +4730,11 @@ static int tg3_poll_work(struct tg3_napi *tnapi, int work_done, int budget) spin_unlock(&tp->lock); } } +} + +static int tg3_poll_work(struct tg3_napi *tnapi, int work_done, int budget) +{ + struct tg3 *tp = tnapi->tp; /* run TX completion thread */ if (tnapi->hw_status->idx[0].tx_consumer != tnapi->tx_cons) { @@ -4749,6 +4753,50 @@ static int tg3_poll_work(struct tg3_napi *tnapi, int work_done, int budget) return work_done; } +static int tg3_poll_msix(struct napi_struct *napi, int budget) +{ + struct tg3_napi *tnapi = container_of(napi, struct tg3_napi, napi); + struct tg3 *tp = tnapi->tp; + int work_done = 0; + struct tg3_hw_status *sblk = tnapi->hw_status; + + while (1) { + work_done = tg3_poll_work(tnapi, work_done, budget); + + if (unlikely(tp->tg3_flags & TG3_FLAG_TX_RECOVERY_PENDING)) + goto tx_recovery; + + if (unlikely(work_done >= budget)) + break; + + /* tp->last_tag is used in tg3_restart_ints() below + * to tell the hw how much work has been processed, + * so we must read it before checking for more work. + */ + tnapi->last_tag = sblk->status_tag; + tnapi->last_irq_tag = tnapi->last_tag; + rmb(); + + /* check for RX/TX work to do */ + if (sblk->idx[0].tx_consumer == tnapi->tx_cons && + *(tnapi->rx_rcb_prod_idx) == tnapi->rx_rcb_ptr) { + napi_complete(napi); + /* Reenable interrupts. */ + tw32_mailbox(tnapi->int_mbox, tnapi->last_tag << 24); + mmiowb(); + break; + } + } + + return work_done; + +tx_recovery: + /* work_done is guaranteed to be less than budget. */ + napi_complete(napi); + schedule_work(&tp->reset_task); + return work_done; +} + static int tg3_poll(struct napi_struct *napi, int budget) { struct tg3_napi *tnapi = container_of(napi, struct tg3_napi, napi); @@ -4757,6 +4805,8 @@ static int tg3_poll(struct napi_struct *napi, int budget) struct tg3_hw_status *sblk = tnapi->hw_status; while (1) { + tg3_poll_link(tp); + work_done = tg3_poll_work(tnapi, work_done, budget); if (unlikely(tp->tg3_flags & TG3_FLAG_TX_RECOVERY_PENDING)) @@ -14057,10 +14107,13 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, tnapi->consmbox = rcvmbx; tnapi->prodmbox = sndmbx; - if (i) + if (i) { tnapi->coal_now = HOSTCC_MODE_COAL_VEC1_NOW << (i - 1); - else + netif_napi_add(dev, &tnapi->napi, tg3_poll_msix, 64); + } else { tnapi->coal_now = HOSTCC_MODE_NOW; + netif_napi_add(dev, &tnapi->napi, tg3_poll, 64); + } if (!(tp->tg3_flags & TG3_FLAG_SUPPORT_MSIX)) break; @@ -14083,7 +14136,6 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, sndmbx += 0xc; } - netif_napi_add(dev, &tp->napi[0].napi, tg3_poll, 64); dev->ethtool_ops = &tg3_ethtool_ops; dev->watchdog_timeo = TG3_TX_TIMEOUT; dev->irq = pdev->irq; -- 2.7.4