diff options
| -rw-r--r-- | arch/arm/boot/dts/sama5d3_gmac.dtsi | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.c | 419 | ||||
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.h | 53 |
3 files changed, 399 insertions, 75 deletions
diff --git a/arch/arm/boot/dts/sama5d3_gmac.dtsi b/arch/arm/boot/dts/sama5d3_gmac.dtsi index a6cb0508762f..de5ed59fb446 100644 --- a/arch/arm/boot/dts/sama5d3_gmac.dtsi +++ b/arch/arm/boot/dts/sama5d3_gmac.dtsi @@ -74,7 +74,7 @@ }; macb0: ethernet@f0028000 { - compatible = "cdns,pc302-gem", "cdns,gem"; + compatible = "atmel,sama5d3-gem"; reg = <0xf0028000 0x100>; interrupts = <34 IRQ_TYPE_LEVEL_HIGH 3>; pinctrl-names = "default"; diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index e9daa072ebb4..ca5d7798b265 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -52,6 +52,9 @@ | MACB_BIT(TXERR)) #define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP)) +#define MACB_MAX_TX_LEN ((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1)) +#define GEM_MAX_TX_LEN ((unsigned int)((1 << GEM_TX_FRMLEN_SIZE) - 1)) + /* * Graceful stop timeouts in us. We should allow up to * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions) @@ -264,7 +267,8 @@ static void macb_handle_link_change(struct net_device *dev) reg |= MACB_BIT(FD); if (phydev->speed == SPEED_100) reg |= MACB_BIT(SPD); - if (phydev->speed == SPEED_1000) + if (phydev->speed == SPEED_1000 && + bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE) reg |= GEM_BIT(GBE); macb_or_gem_writel(bp, NCFGR, reg); @@ -337,7 +341,7 @@ static int macb_mii_probe(struct net_device *dev) } /* mask with MAC supported features */ - if (macb_is_gem(bp)) + if (macb_is_gem(bp) && bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE) phydev->supported &= PHY_GBIT_FEATURES; else phydev->supported &= PHY_BASIC_FEATURES; @@ -467,6 +471,24 @@ static int macb_halt_tx(struct macb *bp) return -ETIMEDOUT; } +static void macb_tx_unmap(struct macb *bp, struct macb_tx_skb *tx_skb) +{ + if (tx_skb->mapping) { + if (tx_skb->mapped_as_page) + dma_unmap_page(&bp->pdev->dev, tx_skb->mapping, + tx_skb->size, DMA_TO_DEVICE); + else + dma_unmap_single(&bp->pdev->dev, tx_skb->mapping, + tx_skb->size, DMA_TO_DEVICE); + tx_skb->mapping = 0; + } + + if (tx_skb->skb) { + dev_kfree_skb_any(tx_skb->skb); + tx_skb->skb = NULL; + } +} + static void macb_tx_error_task(struct work_struct *work) { struct macb *bp = container_of(work, struct macb, tx_error_task); @@ -504,10 +526,23 @@ static void macb_tx_error_task(struct work_struct *work) skb = tx_skb->skb; if (ctrl & MACB_BIT(TX_USED)) { - netdev_vdbg(bp->dev, "txerr skb %u (data %p) TX complete\n", - macb_tx_ring_wrap(tail), skb->data); - bp->stats.tx_packets++; - bp->stats.tx_bytes += skb->len; + /* skb is set for the last buffer of the frame */ + while (!skb) { + macb_tx_unmap(bp, tx_skb); + tail++; + tx_skb = macb_tx_skb(bp, tail); + skb = tx_skb->skb; + } + + /* ctrl still refers to the first buffer descriptor + * since it's the only one written back by the hardware + */ + if (!(ctrl & MACB_BIT(TX_BUF_EXHAUSTED))) { + netdev_vdbg(bp->dev, "txerr skb %u (data %p) TX complete\n", + macb_tx_ring_wrap(tail), skb->data); + bp->stats.tx_packets++; + bp->stats.tx_bytes += skb->len; + } } else { /* * "Buffers exhausted mid-frame" errors may only happen @@ -521,10 +556,7 @@ static void macb_tx_error_task(struct work_struct *work) desc->ctrl = ctrl | MACB_BIT(TX_USED); } - dma_unmap_single(&bp->pdev->dev, tx_skb->mapping, skb->len, - DMA_TO_DEVICE); - tx_skb->skb = NULL; - dev_kfree_skb(skb); + macb_tx_unmap(bp, tx_skb); } /* Make descriptor updates visible to hardware */ @@ -572,20 +604,35 @@ static void macb_tx_interrupt(struct macb *bp) ctrl = desc->ctrl; + /* TX_USED bit is only set by hardware on the very first buffer + * descriptor of the transmitted frame. + */ if (!(ctrl & MACB_BIT(TX_USED))) break; - tx_skb = macb_tx_skb(bp, tail); - skb = tx_skb->skb; + /* Process all buffers of the current transmitted frame */ + for (;; tail++) { + tx_skb = macb_tx_skb(bp, tail); + skb = tx_skb->skb; + + /* First, update TX stats if needed */ + if (skb) { + netdev_vdbg(bp->dev, "skb %u (data %p) TX complete\n", + macb_tx_ring_wrap(tail), skb->data); + bp->stats.tx_packets++; + bp->stats.tx_bytes += skb->len; + } - netdev_vdbg(bp->dev, "skb %u (data %p) TX complete\n", - macb_tx_ring_wrap(tail), skb->data); - dma_unmap_single(&bp->pdev->dev, tx_skb->mapping, skb->len, - DMA_TO_DEVICE); - bp->stats.tx_packets++; - bp->stats.tx_bytes += skb->len; - tx_skb->skb = NULL; - dev_kfree_skb_irq(skb); + /* Now we can safely release resources */ + macb_tx_unmap(bp, tx_skb); + + /* skb is set only for the last buffer of the frame. + * WARNING: at this point skb has been freed by + * macb_tx_unmap(). + */ + if (skb) + break; + } } bp->tx_tail = tail; @@ -718,6 +765,10 @@ static int gem_rx(struct macb *bp, int budget) skb->protocol = eth_type_trans(skb, bp->dev); skb_checksum_none_assert(skb); + if (bp->dev->features & NETIF_F_RXCSUM && + !(bp->dev->flags & IFF_PROMISC) && + GEM_BFEXT(RX_CSUM, ctrl) & GEM_RX_CSUM_CHECKED_MASK) + skb->ip_summed = CHECKSUM_UNNECESSARY; bp->stats.rx_packets++; bp->stats.rx_bytes += skb->len; @@ -1001,15 +1052,145 @@ static void macb_poll_controller(struct net_device *dev) } #endif -static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) +static inline unsigned int macb_count_tx_descriptors(struct macb *bp, + unsigned int len) +{ + return (len + bp->max_tx_length - 1) / bp->max_tx_length; +} + +static unsigned int macb_tx_map(struct macb *bp, + struct sk_buff *skb) { - struct macb *bp = netdev_priv(dev); dma_addr_t mapping; - unsigned int len, entry; + unsigned int len, entry, i, tx_head = bp->tx_head; + struct macb_tx_skb *tx_skb = NULL; struct macb_dma_desc *desc; - struct macb_tx_skb *tx_skb; + unsigned int offset, size, count = 0; + unsigned int f, nr_frags = skb_shinfo(skb)->nr_frags; + unsigned int eof = 1; u32 ctrl; + + /* First, map non-paged data */ + len = skb_headlen(skb); + offset = 0; + while (len) { + size = min(len, bp->max_tx_length); + entry = macb_tx_ring_wrap(tx_head); + tx_skb = &bp->tx_skb[entry]; + + mapping = dma_map_single(&bp->pdev->dev, + skb->data + offset, + size, DMA_TO_DEVICE); + if (dma_mapping_error(&bp->pdev->dev, mapping)) + goto dma_error; + + /* Save info to properly release resources */ + tx_skb->skb = NULL; + tx_skb->mapping = mapping; + tx_skb->size = size; + tx_skb->mapped_as_page = false; + + len -= size; + offset += size; + count++; + tx_head++; + } + + /* Then, map paged data from fragments */ + for (f = 0; f < nr_frags; f++) { + const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; + + len = skb_frag_size(frag); + offset = 0; + while (len) { + size = min(len, bp->max_tx_length); + entry = macb_tx_ring_wrap(tx_head); + tx_skb = &bp->tx_skb[entry]; + + mapping = skb_frag_dma_map(&bp->pdev->dev, frag, + offset, size, DMA_TO_DEVICE); + if (dma_mapping_error(&bp->pdev->dev, mapping)) + goto dma_error; + + /* Save info to properly release resources */ + tx_skb->skb = NULL; + tx_skb->mapping = mapping; + tx_skb->size = size; + tx_skb->mapped_as_page = true; + + len -= size; + offset += size; + count++; + tx_head++; + } + } + + /* Should never happen */ + if (unlikely(tx_skb == NULL)) { + netdev_err(bp->dev, "BUG! empty skb!\n"); + return 0; + } + + /* This is the last buffer of the frame: save socket buffer */ + tx_skb->skb = skb; + + /* Update TX ring: update buffer descriptors in reverse order + * to avoid race condition + */ + + /* Set 'TX_USED' bit in buffer descriptor at tx_head position + * to set the end of TX queue + */ + i = tx_head; + entry = macb_tx_ring_wrap(i); + ctrl = MACB_BIT(TX_USED); + desc = &bp->tx_ring[entry]; + desc->ctrl = ctrl; + + do { + i--; + entry = macb_tx_ring_wrap(i); + tx_skb = &bp->tx_skb[entry]; + desc = &bp->tx_ring[entry]; + + ctrl = (u32)tx_skb->size; + if (eof) { + ctrl |= MACB_BIT(TX_LAST); + eof = 0; + } + if (unlikely(entry == (TX_RING_SIZE - 1))) + ctrl |= MACB_BIT(TX_WRAP); + + /* Set TX buffer descriptor */ + desc->addr = tx_skb->mapping; + /* desc->addr must be visible to hardware before clearing + * 'TX_USED' bit in desc->ctrl. + */ + wmb(); + desc->ctrl = ctrl; + } while (i != bp->tx_head); + + bp->tx_head = tx_head; + + return count; + +dma_error: + netdev_err(bp->dev, "TX DMA map failed\n"); + + for (i = bp->tx_head; i != tx_head; i++) { + tx_skb = macb_tx_skb(bp, i); + + macb_tx_unmap(bp, tx_skb); + } + + return 0; +} + +static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct macb *bp = netdev_priv(dev); unsigned long flags; + unsigned int count, nr_frags, frag_size, f; #if defined(DEBUG) && defined(VERBOSE_DEBUG) netdev_vdbg(bp->dev, @@ -1020,44 +1201,34 @@ static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) skb->data, 16, true); #endif - len = skb->len; + /* Count how many TX buffer descriptors are needed to send this + * socket buffer: skb fragments of jumbo frames may need to be + * splitted into many buffer descriptors. + */ + count = macb_count_tx_descriptors(bp, skb_headlen(skb)); + nr_frags = skb_shinfo(skb)->nr_frags; + for (f = 0; f < nr_frags; f++) { + frag_size = skb_frag_size(&skb_shinfo(skb)->frags[f]); + count += macb_count_tx_descriptors(bp, frag_size); + } + spin_lock_irqsave(&bp->lock, flags); /* This is a hard error, log it. */ - if (CIRC_SPACE(bp->tx_head, bp->tx_tail, TX_RING_SIZE) < 1) { + if (CIRC_SPACE(bp->tx_head, bp->tx_tail, TX_RING_SIZE) < count) { netif_stop_queue(dev); spin_unlock_irqrestore(&bp->lock, flags); - netdev_err(bp->dev, "BUG! Tx Ring full when queue awake!\n"); netdev_dbg(bp->dev, "tx_head = %u, tx_tail = %u\n", bp->tx_head, bp->tx_tail); return NETDEV_TX_BUSY; } - entry = macb_tx_ring_wrap(bp->tx_head); - netdev_vdbg(bp->dev, "Allocated ring entry %u\n", entry); - mapping = dma_map_single(&bp->pdev->dev, skb->data, - len, DMA_TO_DEVICE); - if (dma_mapping_error(&bp->pdev->dev, mapping)) { + /* Map socket buffer for DMA transfer */ + if (!macb_tx_map(bp, skb)) { dev_kfree_skb_any(skb); goto unlock; } - bp->tx_head++; - tx_skb = &bp->tx_skb[entry]; - tx_skb->skb = skb; - tx_skb->mapping = mapping; - netdev_vdbg(bp->dev, "Mapped skb data %p to DMA addr %08lx\n", - skb->data, (unsigned long)mapping); - - ctrl = MACB_BF(TX_FRMLEN, len); - ctrl |= MACB_BIT(TX_LAST); - if (entry == (TX_RING_SIZE - 1)) - ctrl |= MACB_BIT(TX_WRAP); - - desc = &bp->tx_ring[entry]; - desc->addr = mapping; - desc->ctrl = ctrl; - /* Make newly initialized descriptor visible to hardware */ wmb(); @@ -1342,7 +1513,7 @@ static u32 macb_dbw(struct macb *bp) /* * Configure the receive DMA engine * - use the correct receive buffer size - * - set the possibility to use INCR16 bursts + * - set best burst length for DMA operations * (if not supported by FIFO, it will fallback to default) * - set both rx/tx packet buffers to full memory size * These are configurable parameters for GEM. @@ -1354,24 +1525,20 @@ static void macb_configure_dma(struct macb *bp) if (macb_is_gem(bp)) { dmacfg = gem_readl(bp, DMACFG) & ~GEM_BF(RXBS, -1L); dmacfg |= GEM_BF(RXBS, bp->rx_buffer_size / RX_BUFFER_MULTIPLE); - dmacfg |= GEM_BF(FBLDO, 16); + if (bp->dma_burst_length) + dmacfg = GEM_BFINS(FBLDO, bp->dma_burst_length, dmacfg); dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L); dmacfg &= ~GEM_BIT(ENDIA); + if (bp->dev->features & NETIF_F_HW_CSUM) + dmacfg |= GEM_BIT(TXCOEN); + else + dmacfg &= ~GEM_BIT(TXCOEN); + netdev_dbg(bp->dev, "Cadence configure DMA with 0x%08x\n", + dmacfg); gem_writel(bp, DMACFG, dmacfg); } } -/* - * Configure peripheral capacities according to integration options used - */ -static void macb_configure_caps(struct macb *bp) -{ - if (macb_is_gem(bp)) { - if (GEM_BFEXT(IRQCOR, gem_readl(bp, DCFG1)) == 0) - bp->caps |= MACB_CAPS_ISR_CLEAR_ON_WRITE; - } -} - static void macb_init_hw(struct macb *bp) { u32 config; @@ -1386,6 +1553,8 @@ static void macb_init_hw(struct macb *bp) config |= MACB_BIT(BIG); /* Receive oversized frames */ if (bp->dev->flags & IFF_PROMISC) config |= MACB_BIT(CAF); /* Copy All Frames */ + else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM) + config |= GEM_BIT(RXCOEN); if (!(bp->dev->flags & IFF_BROADCAST)) config |= MACB_BIT(NBC); /* No BroadCast */ config |= macb_dbw(bp); @@ -1394,7 +1563,6 @@ static void macb_init_hw(struct macb *bp) bp->duplex = DUPLEX_HALF; macb_configure_dma(bp); - macb_configure_caps(bp); /* Initialize TX and RX buffers */ macb_writel(bp, RBQP, bp->rx_ring_dma); @@ -1500,13 +1668,22 @@ void macb_set_rx_mode(struct net_device *dev) cfg = macb_readl(bp, NCFGR); - if (dev->flags & IFF_PROMISC) + if (dev->flags & IFF_PROMISC) { /* Enable promiscuous mode */ cfg |= MACB_BIT(CAF); - else if (dev->flags & (~IFF_PROMISC)) - /* Disable promiscuous mode */ + + /* Disable RX checksum offload */ + if (macb_is_gem(bp)) + cfg &= ~GEM_BIT(RXCOEN); + } else { + /* Disable promiscuous mode */ cfg &= ~MACB_BIT(CAF); + /* Enable RX checksum offload only if requested */ + if (macb_is_gem(bp) && dev->features & NETIF_F_RXCSUM) + cfg |= GEM_BIT(RXCOEN); + } + if (dev->flags & IFF_ALLMULTI) { /* Enable all multicast mode */ macb_or_gem_writel(bp, HRB, -1); @@ -1767,6 +1944,40 @@ int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) } EXPORT_SYMBOL_GPL(macb_ioctl); +static int macb_set_features(struct net_device *netdev, + netdev_features_t features) +{ + struct macb *bp = netdev_priv(netdev); + netdev_features_t changed = features ^ netdev->features; + + /* TX checksum offload */ + if ((changed & NETIF_F_HW_CSUM) && macb_is_gem(bp)) { + u32 dmacfg; + + dmacfg = gem_readl(bp, DMACFG); + if (features & NETIF_F_HW_CSUM) + dmacfg |= GEM_BIT(TXCOEN); + else + dmacfg &= ~GEM_BIT(TXCOEN); + gem_writel(bp, DMACFG, dmacfg); + } + + /* RX checksum offload */ + if ((changed & NETIF_F_RXCSUM) && macb_is_gem(bp)) { + u32 netcfg; + + netcfg = gem_readl(bp, NCFGR); + if (features & NETIF_F_RXCSUM && + !(netdev->flags & IFF_PROMISC)) + netcfg |= GEM_BIT(RXCOEN); + else + netcfg &= ~GEM_BIT(RXCOEN); + gem_writel(bp, NCFGR, netcfg); + } + + return 0; +} + static const struct net_device_ops macb_netdev_ops = { .ndo_open = macb_open, .ndo_stop = macb_close, @@ -1780,20 +1991,77 @@ static const struct net_device_ops macb_netdev_ops = { #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = macb_poll_controller, #endif + .ndo_set_features = macb_set_features, }; #if defined(CONFIG_OF) +static struct macb_config pc302gem_config = { + .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE, + .dma_burst_length = 16, +}; + +static struct macb_config sama5d3_config = { + .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE, + .dma_burst_length = 16, +}; + +static struct macb_config sama5d4_config = { + .caps = 0, + .dma_burst_length = 4, +}; + static const struct of_device_id macb_dt_ids[] = { { .compatible = "cdns,at32ap7000-macb" }, { .compatible = "cdns,at91sam9260-macb" }, { .compatible = "cdns,macb" }, - { .compatible = "cdns,pc302-gem" }, - { .compatible = "cdns,gem" }, + { .compatible = "cdns,pc302-gem", .data = &pc302gem_config }, + { .compatible = "cdns,gem", .data = &pc302gem_config }, + { .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config }, + { .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, macb_dt_ids); #endif +/* + * Configure peripheral capacities according to device tree + * and integration options used + */ +static void macb_configure_caps(struct macb *bp) +{ + u32 dcfg; + const struct of_device_id *match; + const struct macb_config *config; + + if (bp->pdev->dev.of_node) { + match = of_match_node(macb_dt_ids, bp->pdev->dev.of_node); + if (match && match->data) { + config = (const struct macb_config *)match->data; + + bp->caps = config->caps; + /* + * As we have access to the matching node, configure + * DMA burst length as well + */ + bp->dma_burst_length = config->dma_burst_length; + } + } + + if (MACB_BFEXT(IDNUM, macb_readl(bp, MID)) == 0x2) + bp->caps |= MACB_CAPS_MACB_IS_GEM; + + if (macb_is_gem(bp)) { + dcfg = gem_readl(bp, DCFG1); + if (GEM_BFEXT(IRQCOR, dcfg) == 0) + bp->caps |= MACB_CAPS_ISR_CLEAR_ON_WRITE; + dcfg = gem_readl(bp, DCFG2); + if ((dcfg & (GEM_BIT(RX_PKT_BUFF) | GEM_BIT(TX_PKT_BUFF))) == 0) + bp->caps |= MACB_CAPS_FIFO_MODE; + } + + netdev_dbg(bp->dev, "Cadence caps 0x%08x\n", bp->caps); +} + static int __init macb_probe(struct platform_device *pdev) { struct macb_platform_data *pdata; @@ -1828,9 +2096,6 @@ static int __init macb_probe(struct platform_device *pdev) SET_NETDEV_DEV(dev, &pdev->dev); - /* TODO: Actually, we have some interesting features... */ - dev->features |= 0; - bp = netdev_priv(dev); bp->pdev = pdev; bp->dev = dev; @@ -1897,19 +2162,33 @@ static int __init macb_probe(struct platform_device *pdev) dev->base_addr = regs->start; + /* setup capacities */ + macb_configure_caps(bp); + /* setup appropriated routines according to adapter type */ if (macb_is_gem(bp)) { + bp->max_tx_length = GEM_MAX_TX_LEN; bp->macbgem_ops.mog_alloc_rx_buffers = gem_alloc_rx_buffers; bp->macbgem_ops.mog_free_rx_buffers = gem_free_rx_buffers; bp->macbgem_ops.mog_init_rings = gem_init_rings; bp->macbgem_ops.mog_rx = gem_rx; } else { + bp->max_tx_length = MACB_MAX_TX_LEN; bp->macbgem_ops.mog_alloc_rx_buffers = macb_alloc_rx_buffers; bp->macbgem_ops.mog_free_rx_buffers = macb_free_rx_buffers; bp->macbgem_ops.mog_init_rings = macb_init_rings; bp->macbgem_ops.mog_rx = macb_rx; } + /* Set features */ + dev->hw_features = NETIF_F_SG; + /* Checksum offload is only available on gem with packet buffer */ + if (macb_is_gem(bp) && !(bp->caps & MACB_CAPS_FIFO_MODE)) + dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM; + if (bp->caps & MACB_CAPS_SG_DISABLED) + dev->hw_features &= ~NETIF_F_SG; + dev->features = dev->hw_features; + /* Set MII management clock divider */ config = macb_mdc_clk_div(bp); config |= macb_dbw(bp); diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h index 51c02442160a..517c09d72c4a 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -164,6 +164,8 @@ #define GEM_CLK_SIZE 3 #define GEM_DBW_OFFSET 21 #define GEM_DBW_SIZE 2 +#define GEM_RXCOEN_OFFSET 24 +#define GEM_RXCOEN_SIZE 1 /* Constants for data bus width. */ #define GEM_DBW32 0 @@ -305,6 +307,12 @@ #define GEM_DBWDEF_OFFSET 25 #define GEM_DBWDEF_SIZE 3 +/* Bitfields in DCFG2. */ +#define GEM_RX_PKT_BUFF_OFFSET 20 +#define GEM_RX_PKT_BUFF_SIZE 1 +#define GEM_TX_PKT_BUFF_OFFSET 21 +#define GEM_TX_PKT_BUFF_SIZE 1 + /* Constants for CLK */ #define MACB_CLK_DIV8 0 #define MACB_CLK_DIV16 1 @@ -326,7 +334,11 @@ #define MACB_MAN_CODE 2 /* Capability mask bits */ -#define MACB_CAPS_ISR_CLEAR_ON_WRITE 0x1 +#define MACB_CAPS_ISR_CLEAR_ON_WRITE 0x00000001 +#define MACB_CAPS_FIFO_MODE 0x10000000 +#define MACB_CAPS_GIGABIT_MODE_AVAILABLE 0x20000000 +#define MACB_CAPS_SG_DISABLED 0x40000000 +#define MACB_CAPS_MACB_IS_GEM 0x80000000 /* Bit manipulation macros */ #define MACB_BIT(name) \ @@ -442,6 +454,14 @@ struct macb_dma_desc { #define MACB_RX_BROADCAST_OFFSET 31 #define MACB_RX_BROADCAST_SIZE 1 +/* RX checksum offload disabled: bit 24 clear in NCFGR */ +#define GEM_RX_TYPEID_MATCH_OFFSET 22 +#define GEM_RX_TYPEID_MATCH_SIZE 2 + +/* RX checksum offload enabled: bit 24 set in NCFGR */ +#define GEM_RX_CSUM_OFFSET 22 +#define GEM_RX_CSUM_SIZE 2 + #define MACB_TX_FRMLEN_OFFSET 0 #define MACB_TX_FRMLEN_SIZE 11 #define MACB_TX_LAST_OFFSET 15 @@ -459,14 +479,32 @@ struct macb_dma_desc { #define MACB_TX_USED_OFFSET 31 #define MACB_TX_USED_SIZE 1 +#define GEM_TX_FRMLEN_OFFSET 0 +#define GEM_TX_FRMLEN_SIZE 14 + +/* Buffer descriptor constants */ +#define GEM_RX_CSUM_NONE 0 +#define GEM_RX_CSUM_IP_ONLY 1 +#define GEM_RX_CSUM_IP_TCP 2 +#define GEM_RX_CSUM_IP_UDP 3 + +/* limit RX checksum offload to TCP and UDP packets */ +#define GEM_RX_CSUM_CHECKED_MASK 2 + /** * struct macb_tx_skb - data about an skb which is being transmitted - * @skb: skb currently being transmitted - * @mapping: DMA address of the skb's data buffer + * @skb: skb currently being transmitted, only set for the last buffer + * of the frame + * @mapping: DMA address of the skb's fragment buffer + * @size: size of the DMA mapped buffer + * @mapped_as_page: true when buffer was mapped with skb_frag_dma_map(), + * false when buffer was mapped with dma_map_single() */ struct macb_tx_skb { struct sk_buff *skb; dma_addr_t mapping; + size_t size; + bool mapped_as_page; }; /* @@ -554,6 +592,11 @@ struct macb_or_gem_ops { int (*mog_rx)(struct macb *bp, int budget); }; +struct macb_config { + u32 caps; + unsigned int dma_burst_length; +}; + struct macb { void __iomem *regs; @@ -595,6 +638,7 @@ struct macb { unsigned int duplex; u32 caps; + unsigned int dma_burst_length; phy_interface_t phy_interface; @@ -602,6 +646,7 @@ struct macb { struct sk_buff *skb; /* holds skb until xmit interrupt completes */ dma_addr_t skb_physaddr; /* phys addr from pci_map_single */ int skb_length; /* saved skb length for pci_unmap_single */ + unsigned int max_tx_length; }; extern const struct ethtool_ops macb_ethtool_ops; @@ -615,7 +660,7 @@ void macb_get_hwaddr(struct macb *bp); static inline bool macb_is_gem(struct macb *bp) { - return MACB_BFEXT(IDNUM, macb_readl(bp, MID)) == 0x2; + return !!(bp->caps & MACB_CAPS_MACB_IS_GEM); } #endif /* _MACB_H */ |