From 13d6428538feaefa6c796f76b9918de165ae69f8 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Sun, 1 Jun 2008 20:51:22 +0200 Subject: [PATCH] mv643xx_eth: split out tx queue state Split all TX queue related state into 'struct tx_queue', in preparation for multiple TX queue support. Signed-off-by: Lennert Buytenhek Acked-by: Dale Farnsworth --- drivers/net/mv643xx_eth.c | 510 +++++++++++++++++++------------------- 1 file changed, 254 insertions(+), 256 deletions(-) diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index 5bd4b38e953d..2ef71c48ef47 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -297,38 +297,30 @@ struct rx_queue { struct timer_list rx_oom; }; -struct mv643xx_eth_private { - struct mv643xx_eth_shared_private *shared; - int port_num; /* User Ethernet port number */ - - struct mv643xx_eth_shared_private *shared_smi; - - u32 tx_sram_addr; /* Base address of tx sram area */ - u32 tx_sram_size; /* Size of tx sram area */ - - /* Tx/Rx rings managment indexes fields. For driver use */ - - /* Next available and first returning Tx resource */ - int tx_curr_desc, tx_used_desc; +struct tx_queue { + int tx_ring_size; -#ifdef MV643XX_ETH_TX_FAST_REFILL - u32 tx_clean_threshold; -#endif + int tx_desc_count; + int tx_curr_desc; + int tx_used_desc; struct tx_desc *tx_desc_area; dma_addr_t tx_desc_dma; int tx_desc_area_size; struct sk_buff **tx_skb; +}; + +struct mv643xx_eth_private { + struct mv643xx_eth_shared_private *shared; + int port_num; /* User Ethernet port number */ + + struct mv643xx_eth_shared_private *shared_smi; struct work_struct tx_timeout_task; struct net_device *dev; struct mib_counters mib_counters; spinlock_t lock; - /* Size of Tx Ring per queue */ - int tx_ring_size; - /* Number of tx descriptors in use */ - int tx_desc_count; u32 rx_int_coal; u32 tx_int_coal; @@ -342,6 +334,17 @@ struct mv643xx_eth_private { int rx_desc_sram_size; struct napi_struct napi; struct rx_queue rxq[1]; + + /* + * TX state. + */ + int default_tx_ring_size; + unsigned long tx_desc_sram_addr; + int tx_desc_sram_size; + struct tx_queue txq[1]; +#ifdef MV643XX_ETH_TX_FAST_REFILL + int tx_clean_threshold; +#endif }; @@ -363,6 +366,11 @@ static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq) return container_of(rxq, struct mv643xx_eth_private, rxq[0]); } +static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq) +{ + return container_of(txq, struct mv643xx_eth_private, txq[0]); +} + static void rxq_enable(struct rx_queue *rxq) { struct mv643xx_eth_private *mp = rxq_to_mp(rxq); @@ -379,39 +387,33 @@ static void rxq_disable(struct rx_queue *rxq) udelay(10); } -static void mv643xx_eth_port_enable_tx(struct mv643xx_eth_private *mp, - unsigned int queues) +static void txq_enable(struct tx_queue *txq) { - wrl(mp, TXQ_COMMAND(mp->port_num), queues); + struct mv643xx_eth_private *mp = txq_to_mp(txq); + wrl(mp, TXQ_COMMAND(mp->port_num), 1); } -static unsigned int mv643xx_eth_port_disable_tx(struct mv643xx_eth_private *mp) +static void txq_disable(struct tx_queue *txq) { - unsigned int port_num = mp->port_num; - u32 queues; - - /* Stop Tx port activity. Check port Tx activity. */ - queues = rdl(mp, TXQ_COMMAND(port_num)) & 0xFF; - if (queues) { - /* Issue stop command for active queues only */ - wrl(mp, TXQ_COMMAND(port_num), (queues << 8)); - - /* Wait for all Tx activity to terminate. */ - /* Check port cause register that all Tx queues are stopped */ - while (rdl(mp, TXQ_COMMAND(port_num)) & 0xFF) - udelay(10); - - /* Wait for Tx FIFO to empty */ - while (rdl(mp, PORT_STATUS(port_num)) & TX_FIFO_EMPTY) - udelay(10); - } + struct mv643xx_eth_private *mp = txq_to_mp(txq); + u8 mask = 1; - return queues; + wrl(mp, TXQ_COMMAND(mp->port_num), mask << 8); + while (rdl(mp, TXQ_COMMAND(mp->port_num)) & mask) + udelay(10); +} + +static void __txq_maybe_wake(struct tx_queue *txq) +{ + struct mv643xx_eth_private *mp = txq_to_mp(txq); + + if (txq->tx_ring_size - txq->tx_desc_count >= MAX_DESCS_PER_SKB) + netif_wake_queue(mp->dev); } /* rx ***********************************************************************/ -static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev); +static void txq_reclaim(struct tx_queue *txq, int force); static void rxq_refill(struct rx_queue *rxq) { @@ -571,7 +573,7 @@ static int mv643xx_eth_poll(struct napi_struct *napi, int budget) #ifdef MV643XX_ETH_TX_FAST_REFILL if (++mp->tx_clean_threshold > 5) { - mv643xx_eth_free_completed_tx_descs(mp->dev); + txq_reclaim(mp->txq, 0); mp->tx_clean_threshold = 0; } #endif @@ -593,55 +595,59 @@ static int mv643xx_eth_poll(struct napi_struct *napi, int budget) /* tx ***********************************************************************/ static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) { - unsigned int frag; - skb_frag_t *fragp; + int frag; for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { - fragp = &skb_shinfo(skb)->frags[frag]; - if (fragp->size <= 8 && fragp->page_offset & 0x7) + skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag]; + if (fragp->size <= 8 && fragp->page_offset & 7) return 1; } + return 0; } -static int alloc_tx_desc_index(struct mv643xx_eth_private *mp) +static int txq_alloc_desc_index(struct tx_queue *txq) { int tx_desc_curr; - BUG_ON(mp->tx_desc_count >= mp->tx_ring_size); + BUG_ON(txq->tx_desc_count >= txq->tx_ring_size); - tx_desc_curr = mp->tx_curr_desc; - mp->tx_curr_desc = (tx_desc_curr + 1) % mp->tx_ring_size; + tx_desc_curr = txq->tx_curr_desc; + txq->tx_curr_desc = (tx_desc_curr + 1) % txq->tx_ring_size; - BUG_ON(mp->tx_curr_desc == mp->tx_used_desc); + BUG_ON(txq->tx_curr_desc == txq->tx_used_desc); return tx_desc_curr; } -static void tx_fill_frag_descs(struct mv643xx_eth_private *mp, - struct sk_buff *skb) +static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb) { + int nr_frags = skb_shinfo(skb)->nr_frags; int frag; - int tx_index; - struct tx_desc *desc; - for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { - skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag]; - - tx_index = alloc_tx_desc_index(mp); - desc = &mp->tx_desc_area[tx_index]; - - desc->cmd_sts = BUFFER_OWNED_BY_DMA; - /* Last Frag enables interrupt and frees the skb */ - if (frag == (skb_shinfo(skb)->nr_frags - 1)) { - desc->cmd_sts |= ZERO_PADDING | - TX_LAST_DESC | - TX_ENABLE_INTERRUPT; - mp->tx_skb[tx_index] = skb; - } else - mp->tx_skb[tx_index] = NULL; - - desc = &mp->tx_desc_area[tx_index]; + for (frag = 0; frag < nr_frags; frag++) { + skb_frag_t *this_frag; + int tx_index; + struct tx_desc *desc; + + this_frag = &skb_shinfo(skb)->frags[frag]; + tx_index = txq_alloc_desc_index(txq); + desc = &txq->tx_desc_area[tx_index]; + + /* + * The last fragment will generate an interrupt + * which will free the skb on TX completion. + */ + if (frag == nr_frags - 1) { + desc->cmd_sts = BUFFER_OWNED_BY_DMA | + ZERO_PADDING | TX_LAST_DESC | + TX_ENABLE_INTERRUPT; + txq->tx_skb[tx_index] = skb; + } else { + desc->cmd_sts = BUFFER_OWNED_BY_DMA; + txq->tx_skb[tx_index] = NULL; + } + desc->l4i_chk = 0; desc->byte_cnt = this_frag->size; desc->buf_ptr = dma_map_page(NULL, this_frag->page, @@ -656,29 +662,28 @@ static inline __be16 sum16_as_be(__sum16 sum) return (__force __be16)sum; } -static void tx_submit_descs_for_skb(struct mv643xx_eth_private *mp, - struct sk_buff *skb) +static void txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb) { + int nr_frags = skb_shinfo(skb)->nr_frags; int tx_index; struct tx_desc *desc; u32 cmd_sts; int length; - int nr_frags = skb_shinfo(skb)->nr_frags; cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA; - tx_index = alloc_tx_desc_index(mp); - desc = &mp->tx_desc_area[tx_index]; + tx_index = txq_alloc_desc_index(txq); + desc = &txq->tx_desc_area[tx_index]; if (nr_frags) { - tx_fill_frag_descs(mp, skb); + txq_submit_frag_skb(txq, skb); length = skb_headlen(skb); - mp->tx_skb[tx_index] = NULL; + txq->tx_skb[tx_index] = NULL; } else { cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT; length = skb->len; - mp->tx_skb[tx_index] = skb; + txq->tx_skb[tx_index] = skb; } desc->byte_cnt = length; @@ -714,15 +719,16 @@ static void tx_submit_descs_for_skb(struct mv643xx_eth_private *mp, /* ensure all descriptors are written before poking hardware */ wmb(); - mv643xx_eth_port_enable_tx(mp, 1); + txq_enable(txq); - mp->tx_desc_count += nr_frags + 1; + txq->tx_desc_count += nr_frags + 1; } static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct mv643xx_eth_private *mp = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; + struct tx_queue *txq; unsigned long flags; BUG_ON(netif_queue_stopped(dev)); @@ -736,19 +742,21 @@ static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) spin_lock_irqsave(&mp->lock, flags); - if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) { + txq = mp->txq; + + if (txq->tx_ring_size - txq->tx_desc_count < MAX_DESCS_PER_SKB) { printk(KERN_ERR "%s: transmit with queue full\n", dev->name); netif_stop_queue(dev); spin_unlock_irqrestore(&mp->lock, flags); return NETDEV_TX_BUSY; } - tx_submit_descs_for_skb(mp, skb); + txq_submit_skb(txq, skb); stats->tx_bytes += skb->len; stats->tx_packets++; dev->trans_start = jiffies; - if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) + if (txq->tx_ring_size - txq->tx_desc_count < MAX_DESCS_PER_SKB) netif_stop_queue(dev); spin_unlock_irqrestore(&mp->lock, flags); @@ -1348,69 +1356,106 @@ static void rxq_deinit(struct rx_queue *rxq) kfree(rxq->rx_skb); } -static void ether_init_tx_desc_ring(struct mv643xx_eth_private *mp) +static int txq_init(struct mv643xx_eth_private *mp) { - int tx_desc_num = mp->tx_ring_size; - struct tx_desc *p_tx_desc; + struct tx_queue *txq = mp->txq; + struct tx_desc *tx_desc; + int size; int i; - /* Initialize the next_desc_ptr links in the Tx descriptors ring */ - p_tx_desc = (struct tx_desc *)mp->tx_desc_area; - for (i = 0; i < tx_desc_num; i++) { - p_tx_desc[i].next_desc_ptr = mp->tx_desc_dma + - ((i + 1) % tx_desc_num) * sizeof(struct tx_desc); + txq->tx_ring_size = mp->default_tx_ring_size; + + txq->tx_desc_count = 0; + txq->tx_curr_desc = 0; + txq->tx_used_desc = 0; + + size = txq->tx_ring_size * sizeof(struct tx_desc); + + if (size <= mp->tx_desc_sram_size) { + txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr, + mp->tx_desc_sram_size); + txq->tx_desc_dma = mp->tx_desc_sram_addr; + } else { + txq->tx_desc_area = dma_alloc_coherent(NULL, size, + &txq->tx_desc_dma, + GFP_KERNEL); + } + + if (txq->tx_desc_area == NULL) { + dev_printk(KERN_ERR, &mp->dev->dev, + "can't allocate tx ring (%d bytes)\n", size); + goto out; } + memset(txq->tx_desc_area, 0, size); + + txq->tx_desc_area_size = size; + txq->tx_skb = kmalloc(txq->tx_ring_size * sizeof(*txq->tx_skb), + GFP_KERNEL); + if (txq->tx_skb == NULL) { + dev_printk(KERN_ERR, &mp->dev->dev, + "can't allocate tx skb ring\n"); + goto out_free; + } + + tx_desc = (struct tx_desc *)txq->tx_desc_area; + for (i = 0; i < txq->tx_ring_size; i++) { + int nexti = (i + 1) % txq->tx_ring_size; + tx_desc[i].next_desc_ptr = txq->tx_desc_dma + + nexti * sizeof(struct tx_desc); + } + + return 0; + - mp->tx_curr_desc = 0; - mp->tx_used_desc = 0; +out_free: + if (size <= mp->tx_desc_sram_size) + iounmap(txq->tx_desc_area); + else + dma_free_coherent(NULL, size, + txq->tx_desc_area, + txq->tx_desc_dma); - mp->tx_desc_area_size = tx_desc_num * sizeof(struct tx_desc); +out: + return -ENOMEM; } -static int mv643xx_eth_free_tx_descs(struct net_device *dev, int force) +static void txq_reclaim(struct tx_queue *txq, int force) { - struct mv643xx_eth_private *mp = netdev_priv(dev); - struct tx_desc *desc; - u32 cmd_sts; - struct sk_buff *skb; + struct mv643xx_eth_private *mp = txq_to_mp(txq); unsigned long flags; - int tx_index; - dma_addr_t addr; - int count; - int released = 0; - while (mp->tx_desc_count > 0) { - spin_lock_irqsave(&mp->lock, flags); - - /* tx_desc_count might have changed before acquiring the lock */ - if (mp->tx_desc_count <= 0) { - spin_unlock_irqrestore(&mp->lock, flags); - return released; - } + spin_lock_irqsave(&mp->lock, flags); + while (txq->tx_desc_count > 0) { + int tx_index; + struct tx_desc *desc; + u32 cmd_sts; + struct sk_buff *skb; + dma_addr_t addr; + int count; - tx_index = mp->tx_used_desc; - desc = &mp->tx_desc_area[tx_index]; + tx_index = txq->tx_used_desc; + desc = &txq->tx_desc_area[tx_index]; cmd_sts = desc->cmd_sts; - if (!force && (cmd_sts & BUFFER_OWNED_BY_DMA)) { - spin_unlock_irqrestore(&mp->lock, flags); - return released; - } + if (!force && (cmd_sts & BUFFER_OWNED_BY_DMA)) + break; - mp->tx_used_desc = (tx_index + 1) % mp->tx_ring_size; - mp->tx_desc_count--; + txq->tx_used_desc = (tx_index + 1) % txq->tx_ring_size; + txq->tx_desc_count--; addr = desc->buf_ptr; count = desc->byte_cnt; - skb = mp->tx_skb[tx_index]; - if (skb) - mp->tx_skb[tx_index] = NULL; + skb = txq->tx_skb[tx_index]; + txq->tx_skb[tx_index] = NULL; if (cmd_sts & ERROR_SUMMARY) { - printk("%s: Error in TX\n", dev->name); - dev->stats.tx_errors++; + dev_printk(KERN_INFO, &mp->dev->dev, "tx error\n"); + mp->dev->stats.tx_errors++; } + /* + * Drop mp->lock while we free the skb. + */ spin_unlock_irqrestore(&mp->lock, flags); if (cmd_sts & TX_FIRST_DESC) @@ -1421,91 +1466,68 @@ static int mv643xx_eth_free_tx_descs(struct net_device *dev, int force) if (skb) dev_kfree_skb_irq(skb); - released = 1; + spin_lock_irqsave(&mp->lock, flags); } - - return released; -} - -static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev) -{ - struct mv643xx_eth_private *mp = netdev_priv(dev); - - if (mv643xx_eth_free_tx_descs(dev, 0) && - mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB) - netif_wake_queue(dev); -} - -static void mv643xx_eth_free_all_tx_descs(struct net_device *dev) -{ - mv643xx_eth_free_tx_descs(dev, 1); + spin_unlock_irqrestore(&mp->lock, flags); } -static void mv643xx_eth_free_tx_rings(struct net_device *dev) +static void txq_deinit(struct tx_queue *txq) { - struct mv643xx_eth_private *mp = netdev_priv(dev); - - /* Stop Tx Queues */ - mv643xx_eth_port_disable_tx(mp); + struct mv643xx_eth_private *mp = txq_to_mp(txq); - /* Free outstanding skb's on TX ring */ - mv643xx_eth_free_all_tx_descs(dev); + txq_disable(txq); + txq_reclaim(txq, 1); - BUG_ON(mp->tx_used_desc != mp->tx_curr_desc); + BUG_ON(txq->tx_used_desc != txq->tx_curr_desc); - /* Free TX ring */ - if (mp->tx_sram_size) - iounmap(mp->tx_desc_area); + if (txq->tx_desc_area_size <= mp->tx_desc_sram_size) + iounmap(txq->tx_desc_area); else - dma_free_coherent(NULL, mp->tx_desc_area_size, - mp->tx_desc_area, mp->tx_desc_dma); + dma_free_coherent(NULL, txq->tx_desc_area_size, + txq->tx_desc_area, txq->tx_desc_dma); + + kfree(txq->tx_skb); } /* netdev ops and related ***************************************************/ static void port_reset(struct mv643xx_eth_private *mp); -static void mv643xx_eth_update_pscr(struct net_device *dev, +static void mv643xx_eth_update_pscr(struct mv643xx_eth_private *mp, struct ethtool_cmd *ecmd) { - struct mv643xx_eth_private *mp = netdev_priv(dev); - int port_num = mp->port_num; - u32 o_pscr, n_pscr; - unsigned int queues; + u32 pscr_o; + u32 pscr_n; - o_pscr = rdl(mp, PORT_SERIAL_CONTROL(port_num)); - n_pscr = o_pscr; + pscr_o = rdl(mp, PORT_SERIAL_CONTROL(mp->port_num)); /* clear speed, duplex and rx buffer size fields */ - n_pscr &= ~(SET_MII_SPEED_TO_100 | - SET_GMII_SPEED_TO_1000 | - SET_FULL_DUPLEX_MODE | - MAX_RX_PACKET_MASK); - - if (ecmd->duplex == DUPLEX_FULL) - n_pscr |= SET_FULL_DUPLEX_MODE; + pscr_n = pscr_o & ~(SET_MII_SPEED_TO_100 | + SET_GMII_SPEED_TO_1000 | + SET_FULL_DUPLEX_MODE | + MAX_RX_PACKET_MASK); - if (ecmd->speed == SPEED_1000) - n_pscr |= SET_GMII_SPEED_TO_1000 | - MAX_RX_PACKET_9700BYTE; - else { + if (ecmd->speed == SPEED_1000) { + pscr_n |= SET_GMII_SPEED_TO_1000 | MAX_RX_PACKET_9700BYTE; + } else { if (ecmd->speed == SPEED_100) - n_pscr |= SET_MII_SPEED_TO_100; - n_pscr |= MAX_RX_PACKET_1522BYTE; + pscr_n |= SET_MII_SPEED_TO_100; + pscr_n |= MAX_RX_PACKET_1522BYTE; } - if (n_pscr != o_pscr) { - if ((o_pscr & SERIAL_PORT_ENABLE) == 0) - wrl(mp, PORT_SERIAL_CONTROL(port_num), n_pscr); + if (ecmd->duplex == DUPLEX_FULL) + pscr_n |= SET_FULL_DUPLEX_MODE; + + if (pscr_n != pscr_o) { + if ((pscr_o & SERIAL_PORT_ENABLE) == 0) + wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr_n); else { - queues = mv643xx_eth_port_disable_tx(mp); - - o_pscr &= ~SERIAL_PORT_ENABLE; - wrl(mp, PORT_SERIAL_CONTROL(port_num), o_pscr); - wrl(mp, PORT_SERIAL_CONTROL(port_num), n_pscr); - wrl(mp, PORT_SERIAL_CONTROL(port_num), n_pscr); - if (queues) - mv643xx_eth_port_enable_tx(mp, queues); + txq_disable(mp->txq); + pscr_o &= ~SERIAL_PORT_ENABLE; + wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr_o); + wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr_n); + wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr_n); + txq_enable(mp->txq); } } } @@ -1515,29 +1537,26 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id) struct net_device *dev = (struct net_device *)dev_id; struct mv643xx_eth_private *mp = netdev_priv(dev); u32 int_cause, int_cause_ext = 0; - unsigned int port_num = mp->port_num; /* Read interrupt cause registers */ - int_cause = rdl(mp, INT_CAUSE(port_num)) & (INT_RX | INT_EXT); + int_cause = rdl(mp, INT_CAUSE(mp->port_num)) & (INT_RX | INT_EXT); if (int_cause & INT_EXT) { - int_cause_ext = rdl(mp, INT_CAUSE_EXT(port_num)) + int_cause_ext = rdl(mp, INT_CAUSE_EXT(mp->port_num)) & (INT_EXT_LINK | INT_EXT_PHY | INT_EXT_TX); - wrl(mp, INT_CAUSE_EXT(port_num), ~int_cause_ext); + wrl(mp, INT_CAUSE_EXT(mp->port_num), ~int_cause_ext); } /* PHY status changed */ if (int_cause_ext & (INT_EXT_LINK | INT_EXT_PHY)) { - struct ethtool_cmd cmd; - if (mii_link_ok(&mp->mii)) { + struct ethtool_cmd cmd; + mii_ethtool_gset(&mp->mii, &cmd); - mv643xx_eth_update_pscr(dev, &cmd); - mv643xx_eth_port_enable_tx(mp, 1); + mv643xx_eth_update_pscr(mp, &cmd); + txq_enable(mp->txq); if (!netif_carrier_ok(dev)) { netif_carrier_on(dev); - if (mp->tx_ring_size - mp->tx_desc_count >= - MAX_DESCS_PER_SKB) - netif_wake_queue(dev); + __txq_maybe_wake(mp->txq); } } else if (netif_carrier_ok(dev)) { netif_stop_queue(dev); @@ -1548,10 +1567,10 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id) #ifdef MV643XX_ETH_NAPI if (int_cause & INT_RX) { /* schedule the NAPI poll routine to maintain port */ - wrl(mp, INT_MASK(port_num), 0x00000000); + wrl(mp, INT_MASK(mp->port_num), 0x00000000); /* wait for previous write to complete */ - rdl(mp, INT_MASK(port_num)); + rdl(mp, INT_MASK(mp->port_num)); netif_rx_schedule(dev, &mp->napi); } @@ -1559,8 +1578,10 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id) if (int_cause & INT_RX) rxq_process(mp->rxq, INT_MAX); #endif - if (int_cause_ext & INT_EXT_TX) - mv643xx_eth_free_completed_tx_descs(dev); + if (int_cause_ext & INT_EXT_TX) { + txq_reclaim(mp->txq, 0); + __txq_maybe_wake(mp->txq); + } /* * If no real interrupt occured, exit. @@ -1616,6 +1637,20 @@ static void port_start(struct net_device *dev) phy_reset(mp); mv643xx_eth_set_settings(dev, ðtool_cmd); + /* + * Configure TX path and queues. + */ + wrl(mp, TX_BW_MTU(mp->port_num), 0); + for (i = 0; i < 1; i++) { + struct tx_queue *txq = mp->txq; + int off = TXQ_CURRENT_DESC_PTR(mp->port_num); + u32 addr; + + addr = (u32)txq->tx_desc_dma; + addr += txq->tx_curr_desc * sizeof(struct tx_desc); + wrl(mp, off, addr); + } + /* Add the assigned Ethernet address to the port's address table */ uc_addr_set(mp, dev->dev_addr); @@ -1644,13 +1679,6 @@ static void port_start(struct net_device *dev) rxq_enable(rxq); } - - - wrl(mp, TXQ_CURRENT_DESC_PTR(mp->port_num), - (u32)((struct tx_desc *)mp->tx_desc_dma + mp->tx_curr_desc)); - - /* Disable port bandwidth limits by clearing MTU register */ - wrl(mp, TX_BW_MTU(mp->port_num), 0); } #ifdef MV643XX_ETH_COAL @@ -1692,7 +1720,6 @@ static int mv643xx_eth_open(struct net_device *dev) { struct mv643xx_eth_private *mp = netdev_priv(dev); unsigned int port_num = mp->port_num; - unsigned int size; int err; /* Clear any pending ethernet port interrupts */ @@ -1715,38 +1742,9 @@ static int mv643xx_eth_open(struct net_device *dev) goto out_free_irq; rxq_refill(mp->rxq); - mp->tx_skb = kmalloc(sizeof(*mp->tx_skb) * mp->tx_ring_size, - GFP_KERNEL); - if (!mp->tx_skb) { - printk(KERN_ERR "%s: Cannot allocate Tx skb ring\n", dev->name); - err = -ENOMEM; + err = txq_init(mp); + if (err) goto out_free_rx_skb; - } - - /* Allocate TX ring */ - mp->tx_desc_count = 0; - size = mp->tx_ring_size * sizeof(struct tx_desc); - mp->tx_desc_area_size = size; - - if (mp->tx_sram_size) { - mp->tx_desc_area = ioremap(mp->tx_sram_addr, - mp->tx_sram_size); - mp->tx_desc_dma = mp->tx_sram_addr; - } else - mp->tx_desc_area = dma_alloc_coherent(NULL, size, - &mp->tx_desc_dma, - GFP_KERNEL); - - if (!mp->tx_desc_area) { - printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n", - dev->name, size); - err = -ENOMEM; - goto out_free_tx_skb; - } - BUG_ON((u32) mp->tx_desc_area & 0xf); /* check 16-byte alignment */ - memset((void *)mp->tx_desc_area, 0, mp->tx_desc_area_size); - - ether_init_tx_desc_ring(mp); #ifdef MV643XX_ETH_NAPI napi_enable(&mp->napi); @@ -1770,8 +1768,7 @@ static int mv643xx_eth_open(struct net_device *dev) return 0; -out_free_tx_skb: - kfree(mp->tx_skb); + out_free_rx_skb: rxq_deinit(mp->rxq); out_free_irq: @@ -1785,8 +1782,10 @@ static void port_reset(struct mv643xx_eth_private *mp) unsigned int port_num = mp->port_num; unsigned int reg_data; - mv643xx_eth_port_disable_tx(mp); + txq_disable(mp->txq); rxq_disable(mp->rxq); + while (!(rdl(mp, PORT_STATUS(mp->port_num)) & TX_FIFO_EMPTY)) + udelay(10); /* Clear all MIB counters */ clear_mib_counters(mp); @@ -1817,7 +1816,7 @@ static int mv643xx_eth_stop(struct net_device *dev) port_reset(mp); - mv643xx_eth_free_tx_rings(dev); + txq_deinit(mp->txq); rxq_deinit(mp->rxq); free_irq(dev->irq, dev); @@ -1870,8 +1869,7 @@ static void mv643xx_eth_tx_timeout_task(struct work_struct *ugly) port_reset(mp); port_start(dev); - if (mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB) - netif_wake_queue(dev); + __txq_maybe_wake(mp->txq); } static void mv643xx_eth_tx_timeout(struct net_device *dev) @@ -2171,7 +2169,6 @@ static int mv643xx_eth_probe(struct platform_device *pdev) /* set default config values */ uc_addr_get(mp, dev->dev_addr); - mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE; if (is_valid_ether_addr(pd->mac_addr)) memcpy(dev->dev_addr, pd->mac_addr, 6); @@ -2183,12 +2180,13 @@ static int mv643xx_eth_probe(struct platform_device *pdev) if (pd->rx_queue_size) mp->default_rx_ring_size = pd->rx_queue_size; + mp->default_tx_ring_size = DEFAULT_TX_QUEUE_SIZE; if (pd->tx_queue_size) - mp->tx_ring_size = pd->tx_queue_size; + mp->default_tx_ring_size = pd->tx_queue_size; if (pd->tx_sram_size) { - mp->tx_sram_size = pd->tx_sram_size; - mp->tx_sram_addr = pd->tx_sram_addr; + mp->tx_desc_sram_size = pd->tx_sram_size; + mp->tx_desc_sram_addr = pd->tx_sram_addr; } if (pd->rx_sram_size) { @@ -2217,7 +2215,7 @@ static int mv643xx_eth_probe(struct platform_device *pdev) phy_reset(mp); mp->mii.supports_gmii = mii_check_gmii_support(&mp->mii); mv643xx_init_ethtool_cmd(dev, mp->mii.phy_id, speed, duplex, &cmd); - mv643xx_eth_update_pscr(dev, &cmd); + mv643xx_eth_update_pscr(mp, &cmd); mv643xx_eth_set_settings(dev, &cmd); SET_NETDEV_DEV(dev, &pdev->dev); @@ -2250,7 +2248,7 @@ static int mv643xx_eth_probe(struct platform_device *pdev) printk(KERN_NOTICE "%s: RX NAPI Enabled \n", dev->name); #endif - if (mp->tx_sram_size > 0) + if (mp->tx_desc_sram_size > 0) printk(KERN_NOTICE "%s: Using SRAM\n", dev->name); return 0; -- GitLab