diff options
Diffstat (limited to 'drivers/net/e1000/e1000_main.c')
| -rw-r--r-- | drivers/net/e1000/e1000_main.c | 425 |
1 files changed, 388 insertions, 37 deletions
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index 5b8cbdb4b520..f2db9e2069e7 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -137,9 +137,15 @@ static int e1000_clean(struct napi_struct *napi, int budget); static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, struct e1000_rx_ring *rx_ring, int *work_done, int work_to_do); +static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int *work_done, int work_to_do); static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, - struct e1000_rx_ring *rx_ring, + struct e1000_rx_ring *rx_ring, int cleaned_count); +static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int cleaned_count); static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); @@ -761,10 +767,7 @@ void e1000_reset(struct e1000_adapter *adapter) hw->fc_high_water = fc_high_water_mark; hw->fc_low_water = fc_high_water_mark - 8; - if (hw->mac_type == e1000_80003es2lan) - hw->fc_pause_time = 0xFFFF; - else - hw->fc_pause_time = E1000_FC_PAUSE_TIME; + hw->fc_pause_time = E1000_FC_PAUSE_TIME; hw->fc_send_xon = 1; hw->fc = hw->original_fc; @@ -1862,6 +1865,7 @@ setup_rx_desc_die: rxdr->next_to_clean = 0; rxdr->next_to_use = 0; + rxdr->rx_skb_top = NULL; return 0; } @@ -1968,10 +1972,17 @@ static void e1000_configure_rx(struct e1000_adapter *adapter) struct e1000_hw *hw = &adapter->hw; u32 rdlen, rctl, rxcsum, ctrl_ext; - rdlen = adapter->rx_ring[0].count * - sizeof(struct e1000_rx_desc); - adapter->clean_rx = e1000_clean_rx_irq; - adapter->alloc_rx_buf = e1000_alloc_rx_buffers; + if (adapter->netdev->mtu > ETH_DATA_LEN) { + rdlen = adapter->rx_ring[0].count * + sizeof(struct e1000_rx_desc); + adapter->clean_rx = e1000_clean_jumbo_rx_irq; + adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; + } else { + rdlen = adapter->rx_ring[0].count * + sizeof(struct e1000_rx_desc); + adapter->clean_rx = e1000_clean_rx_irq; + adapter->alloc_rx_buf = e1000_alloc_rx_buffers; + } /* disable receives while setting up the descriptors */ rctl = er32(RCTL); @@ -2185,26 +2196,39 @@ static void e1000_clean_rx_ring(struct e1000_adapter *adapter, /* Free all the Rx ring sk_buffs */ for (i = 0; i < rx_ring->count; i++) { buffer_info = &rx_ring->buffer_info[i]; - if (buffer_info->dma) { - pci_unmap_single(pdev, - buffer_info->dma, - buffer_info->length, - PCI_DMA_FROMDEVICE); + if (buffer_info->dma && + adapter->clean_rx == e1000_clean_rx_irq) { + pci_unmap_single(pdev, buffer_info->dma, + buffer_info->length, + PCI_DMA_FROMDEVICE); + } else if (buffer_info->dma && + adapter->clean_rx == e1000_clean_jumbo_rx_irq) { + pci_unmap_page(pdev, buffer_info->dma, + buffer_info->length, + PCI_DMA_FROMDEVICE); } buffer_info->dma = 0; - + if (buffer_info->page) { + put_page(buffer_info->page); + buffer_info->page = NULL; + } if (buffer_info->skb) { dev_kfree_skb(buffer_info->skb); buffer_info->skb = NULL; } } + /* there also may be some cached data from a chained receive */ + if (rx_ring->rx_skb_top) { + dev_kfree_skb(rx_ring->rx_skb_top); + rx_ring->rx_skb_top = NULL; + } + size = sizeof(struct e1000_buffer) * rx_ring->count; memset(rx_ring->buffer_info, 0, size); /* Zero out the descriptor ring */ - memset(rx_ring->desc, 0, rx_ring->size); rx_ring->next_to_clean = 0; @@ -3489,8 +3513,10 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu) /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN * means we reserve 2 more, this pushes us to allocate from the next - * larger slab size - * i.e. RXBUFFER_2048 --> size-4096 slab */ + * larger slab size. + * i.e. RXBUFFER_2048 --> size-4096 slab + * however with the new *_jumbo_rx* routines, jumbo receives will use + * fragmented skbs */ if (max_frame <= E1000_RXBUFFER_256) adapter->rx_buffer_len = E1000_RXBUFFER_256; @@ -3500,12 +3526,12 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu) adapter->rx_buffer_len = E1000_RXBUFFER_1024; else if (max_frame <= E1000_RXBUFFER_2048) adapter->rx_buffer_len = E1000_RXBUFFER_2048; - else if (max_frame <= E1000_RXBUFFER_4096) - adapter->rx_buffer_len = E1000_RXBUFFER_4096; - else if (max_frame <= E1000_RXBUFFER_8192) - adapter->rx_buffer_len = E1000_RXBUFFER_8192; - else if (max_frame <= E1000_RXBUFFER_16384) + else +#if (PAGE_SIZE >= E1000_RXBUFFER_16384) adapter->rx_buffer_len = E1000_RXBUFFER_16384; +#elif (PAGE_SIZE >= E1000_RXBUFFER_4096) + adapter->rx_buffer_len = PAGE_SIZE; +#endif /* adjust allocation if LPE protects us, and we aren't using SBP */ if (!hw->tbi_compatibility_on && @@ -3987,9 +4013,227 @@ static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, } /** + * e1000_consume_page - helper function + **/ +static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, + u16 length) +{ + bi->page = NULL; + skb->len += length; + skb->data_len += length; + skb->truesize += length; +} + +/** + * e1000_receive_skb - helper function to handle rx indications + * @adapter: board private structure + * @status: descriptor status field as written by hardware + * @vlan: descriptor vlan field as written by hardware (no le/be conversion) + * @skb: pointer to sk_buff to be indicated to stack + */ +static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status, + __le16 vlan, struct sk_buff *skb) +{ + if (unlikely(adapter->vlgrp && (status & E1000_RXD_STAT_VP))) { + vlan_hwaccel_receive_skb(skb, adapter->vlgrp, + le16_to_cpu(vlan) & + E1000_RXD_SPC_VLAN_MASK); + } else { + netif_receive_skb(skb); + } +} + +/** + * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy + * @adapter: board private structure + * @rx_ring: ring to clean + * @work_done: amount of napi work completed this call + * @work_to_do: max amount of work allowed for this call to do + * + * the return value indicates whether actual cleaning was done, there + * is no guarantee that everything was cleaned + */ +static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, + int *work_done, int work_to_do) +{ + struct e1000_hw *hw = &adapter->hw; + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + struct e1000_rx_desc *rx_desc, *next_rxd; + struct e1000_buffer *buffer_info, *next_buffer; + unsigned long irq_flags; + u32 length; + unsigned int i; + int cleaned_count = 0; + bool cleaned = false; + unsigned int total_rx_bytes=0, total_rx_packets=0; + + i = rx_ring->next_to_clean; + rx_desc = E1000_RX_DESC(*rx_ring, i); + buffer_info = &rx_ring->buffer_info[i]; + + while (rx_desc->status & E1000_RXD_STAT_DD) { + struct sk_buff *skb; + u8 status; + + if (*work_done >= work_to_do) + break; + (*work_done)++; + + status = rx_desc->status; + skb = buffer_info->skb; + buffer_info->skb = NULL; + + if (++i == rx_ring->count) i = 0; + next_rxd = E1000_RX_DESC(*rx_ring, i); + prefetch(next_rxd); + + next_buffer = &rx_ring->buffer_info[i]; + + cleaned = true; + cleaned_count++; + pci_unmap_page(pdev, buffer_info->dma, buffer_info->length, + PCI_DMA_FROMDEVICE); + buffer_info->dma = 0; + + length = le16_to_cpu(rx_desc->length); + + /* errors is only valid for DD + EOP descriptors */ + if (unlikely((status & E1000_RXD_STAT_EOP) && + (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) { + u8 last_byte = *(skb->data + length - 1); + if (TBI_ACCEPT(hw, status, rx_desc->errors, length, + last_byte)) { + spin_lock_irqsave(&adapter->stats_lock, + irq_flags); + e1000_tbi_adjust_stats(hw, &adapter->stats, + length, skb->data); + spin_unlock_irqrestore(&adapter->stats_lock, + irq_flags); + length--; + } else { + /* recycle both page and skb */ + buffer_info->skb = skb; + /* an error means any chain goes out the window + * too */ + if (rx_ring->rx_skb_top) + dev_kfree_skb(rx_ring->rx_skb_top); + rx_ring->rx_skb_top = NULL; + goto next_desc; + } + } + +#define rxtop rx_ring->rx_skb_top + if (!(status & E1000_RXD_STAT_EOP)) { + /* this descriptor is only the beginning (or middle) */ + if (!rxtop) { + /* this is the beginning of a chain */ + rxtop = skb; + skb_fill_page_desc(rxtop, 0, buffer_info->page, + 0, length); + } else { + /* this is the middle of a chain */ + skb_fill_page_desc(rxtop, + skb_shinfo(rxtop)->nr_frags, + buffer_info->page, 0, length); + /* re-use the skb, only consumed the page */ + buffer_info->skb = skb; + } + e1000_consume_page(buffer_info, rxtop, length); + goto next_desc; + } else { + if (rxtop) { + /* end of the chain */ + skb_fill_page_desc(rxtop, + skb_shinfo(rxtop)->nr_frags, + buffer_info->page, 0, length); + /* re-use the current skb, we only consumed the + * page */ + buffer_info->skb = skb; + skb = rxtop; + rxtop = NULL; + e1000_consume_page(buffer_info, skb, length); + } else { + /* no chain, got EOP, this buf is the packet + * copybreak to save the put_page/alloc_page */ + if (length <= copybreak && + skb_tailroom(skb) >= length) { + u8 *vaddr; + vaddr = kmap_atomic(buffer_info->page, + KM_SKB_DATA_SOFTIRQ); + memcpy(skb_tail_pointer(skb), vaddr, length); + kunmap_atomic(vaddr, + KM_SKB_DATA_SOFTIRQ); + /* re-use the page, so don't erase + * buffer_info->page */ + skb_put(skb, length); + } else { + skb_fill_page_desc(skb, 0, + buffer_info->page, 0, + length); + e1000_consume_page(buffer_info, skb, + length); + } + } + } + + /* Receive Checksum Offload XXX recompute due to CRC strip? */ + e1000_rx_checksum(adapter, + (u32)(status) | + ((u32)(rx_desc->errors) << 24), + le16_to_cpu(rx_desc->csum), skb); + + pskb_trim(skb, skb->len - 4); + + /* probably a little skewed due to removing CRC */ + total_rx_bytes += skb->len; + total_rx_packets++; + + /* eth type trans needs skb->data to point to something */ + if (!pskb_may_pull(skb, ETH_HLEN)) { + DPRINTK(DRV, ERR, "pskb_may_pull failed.\n"); + dev_kfree_skb(skb); + goto next_desc; + } + + skb->protocol = eth_type_trans(skb, netdev); + + e1000_receive_skb(adapter, status, rx_desc->special, skb); + +next_desc: + rx_desc->status = 0; + + /* return some buffers to hardware, one at a time is too slow */ + if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); + cleaned_count = 0; + } + + /* use prefetched values */ + rx_desc = next_rxd; + buffer_info = next_buffer; + } + rx_ring->next_to_clean = i; + + cleaned_count = E1000_DESC_UNUSED(rx_ring); + if (cleaned_count) + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); + + adapter->total_rx_packets += total_rx_packets; + adapter->total_rx_bytes += total_rx_bytes; + adapter->net_stats.rx_bytes += total_rx_bytes; + adapter->net_stats.rx_packets += total_rx_packets; + return cleaned; +} + +/** * e1000_clean_rx_irq - Send received data up the network stack; legacy * @adapter: board private structure - **/ + * @rx_ring: ring to clean + * @work_done: amount of napi work completed this call + * @work_to_do: max amount of work allowed for this call to do + */ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, struct e1000_rx_ring *rx_ring, int *work_done, int work_to_do) @@ -4001,7 +4245,6 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, struct e1000_buffer *buffer_info, *next_buffer; unsigned long flags; u32 length; - u8 last_byte; unsigned int i; int cleaned_count = 0; bool cleaned = false; @@ -4033,9 +4276,7 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, cleaned = true; cleaned_count++; - pci_unmap_single(pdev, - buffer_info->dma, - buffer_info->length, + pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_FROMDEVICE); buffer_info->dma = 0; @@ -4052,7 +4293,7 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, } if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) { - last_byte = *(skb->data + length - 1); + u8 last_byte = *(skb->data + length - 1); if (TBI_ACCEPT(hw, status, rx_desc->errors, length, last_byte)) { spin_lock_irqsave(&adapter->stats_lock, flags); @@ -4107,13 +4348,7 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, skb->protocol = eth_type_trans(skb, netdev); - if (unlikely(adapter->vlgrp && - (status & E1000_RXD_STAT_VP))) { - vlan_hwaccel_receive_skb(skb, adapter->vlgrp, - le16_to_cpu(rx_desc->special)); - } else { - netif_receive_skb(skb); - } + e1000_receive_skb(adapter, status, rx_desc->special, skb); next_desc: rx_desc->status = 0; @@ -4142,6 +4377,114 @@ next_desc: } /** + * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers + * @adapter: address of board private structure + * @rx_ring: pointer to receive ring structure + * @cleaned_count: number of buffers to allocate this pass + **/ + +static void +e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, + struct e1000_rx_ring *rx_ring, int cleaned_count) +{ + struct net_device *netdev = adapter->netdev; + struct pci_dev *pdev = adapter->pdev; + struct e1000_rx_desc *rx_desc; + struct e1000_buffer *buffer_info; + struct sk_buff *skb; + unsigned int i; + unsigned int bufsz = 256 - + 16 /*for skb_reserve */ - + NET_IP_ALIGN; + + i = rx_ring->next_to_use; + buffer_info = &rx_ring->buffer_info[i]; + + while (cleaned_count--) { + skb = buffer_info->skb; + if (skb) { + skb_trim(skb, 0); + goto check_page; + } + + skb = netdev_alloc_skb(netdev, bufsz); + if (unlikely(!skb)) { + /* Better luck next round */ + adapter->alloc_rx_buff_failed++; + break; + } + + /* Fix for errata 23, can't cross 64kB boundary */ + if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { + struct sk_buff *oldskb = skb; + DPRINTK(PROBE, ERR, "skb align check failed: %u bytes " + "at %p\n", bufsz, skb->data); + /* Try again, without freeing the previous */ + skb = netdev_alloc_skb(netdev, bufsz); + /* Failed allocation, critical failure */ + if (!skb) { + dev_kfree_skb(oldskb); + adapter->alloc_rx_buff_failed++; + break; + } + + if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { + /* give up */ + dev_kfree_skb(skb); + dev_kfree_skb(oldskb); + break; /* while (cleaned_count--) */ + } + + /* Use new allocation */ + dev_kfree_skb(oldskb); + } + /* Make buffer alignment 2 beyond a 16 byte boundary + * this will result in a 16 byte aligned IP header after + * the 14 byte MAC header is removed + */ + skb_reserve(skb, NET_IP_ALIGN); + + buffer_info->skb = skb; + buffer_info->length = adapter->rx_buffer_len; +check_page: + /* allocate a new page if necessary */ + if (!buffer_info->page) { + buffer_info->page = alloc_page(GFP_ATOMIC); + if (unlikely(!buffer_info->page)) { + adapter->alloc_rx_buff_failed++; + break; + } + } + + if (!buffer_info->dma) + buffer_info->dma = pci_map_page(pdev, + buffer_info->page, 0, + buffer_info->length, + PCI_DMA_FROMDEVICE); + + rx_desc = E1000_RX_DESC(*rx_ring, i); + rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); + + if (unlikely(++i == rx_ring->count)) + i = 0; + buffer_info = &rx_ring->buffer_info[i]; + } + + if (likely(rx_ring->next_to_use != i)) { + rx_ring->next_to_use = i; + if (unlikely(i-- == 0)) + i = (rx_ring->count - 1); + + /* Force memory writes to complete before letting h/w + * know there are new descriptors to fetch. (Only + * applicable for weak-ordered memory model archs, + * such as IA-64). */ + wmb(); + writel(i, adapter->hw.hw_addr + rx_ring->rdt); + } +} + +/** * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended * @adapter: address of board private structure **/ @@ -4186,6 +4529,7 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, /* Failed allocation, critical failure */ if (!skb) { dev_kfree_skb(oldskb); + adapter->alloc_rx_buff_failed++; break; } @@ -4193,6 +4537,7 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, /* give up */ dev_kfree_skb(skb); dev_kfree_skb(oldskb); + adapter->alloc_rx_buff_failed++; break; /* while !buffer_info->skb */ } @@ -4210,9 +4555,14 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, map_skb: buffer_info->dma = pci_map_single(pdev, skb->data, - adapter->rx_buffer_len, + buffer_info->length, PCI_DMA_FROMDEVICE); + /* + * XXX if it was allocated cleanly it will never map to a + * boundary crossing + */ + /* Fix for errata 23, can't cross 64kB boundary */ if (!e1000_check_64k_bound(adapter, (void *)(unsigned long)buffer_info->dma, @@ -4229,6 +4579,7 @@ map_skb: PCI_DMA_FROMDEVICE); buffer_info->dma = 0; + adapter->alloc_rx_buff_failed++; break; /* while !buffer_info->skb */ } rx_desc = E1000_RX_DESC(*rx_ring, i); |