diff options
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/netdev.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 331 |
1 files changed, 132 insertions, 199 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index f444eb0..fbf75fd 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -146,9 +146,11 @@ static const struct e1000_reg_info e1000_reg_info_tbl[] = { {0, NULL} }; -/* +/** * e1000_regdump - register printout routine - */ + * @hw: pointer to the HW structure + * @reginfo: pointer to the register info table + **/ static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo) { int n = 0; @@ -196,9 +198,10 @@ static void e1000e_dump_ps_pages(struct e1000_adapter *adapter, } } -/* +/** * e1000e_dump - Print registers, Tx-ring and Rx-ring - */ + * @adapter: board private structure + **/ static void e1000e_dump(struct e1000_adapter *adapter) { struct net_device *netdev = adapter->netdev; @@ -623,8 +626,7 @@ map_skb: rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { - /* - * Force memory writes to complete before letting h/w + /* 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). @@ -692,8 +694,7 @@ static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring, goto no_buffers; } } - /* - * Refresh the desc even if buffer_addrs + /* Refresh the desc even if buffer_addrs * didn't change because each write-back * erases this info. */ @@ -726,8 +727,7 @@ static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring, rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma); if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) { - /* - * Force memory writes to complete before letting h/w + /* 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). @@ -817,7 +817,8 @@ check_page: /* 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). */ + * such as IA-64). + */ wmb(); if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA) e1000e_update_rdt_wa(rx_ring, i); @@ -891,8 +892,7 @@ static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done, length = le16_to_cpu(rx_desc->wb.upper.length); - /* - * !EOP means multiple descriptors were used to store a single + /* !EOP means multiple descriptors were used to store a single * packet, if that's the case we need to toss it. In fact, we * need to toss every packet with the EOP bit clear and the * next frame that _does_ have the EOP bit set, as it is by @@ -933,8 +933,7 @@ static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done, total_rx_bytes += length; total_rx_packets++; - /* - * code added for copybreak, this should improve + /* code added for copybreak, this should improve * performance for small packets with large amounts * of reassembly being done in the stack */ @@ -1032,15 +1031,13 @@ static void e1000_print_hw_hang(struct work_struct *work) if (!adapter->tx_hang_recheck && (adapter->flags2 & FLAG2_DMA_BURST)) { - /* - * May be block on write-back, flush and detect again + /* May be block on write-back, flush and detect again * flush pending descriptor writebacks to memory */ ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); /* execute the writes immediately */ e1e_flush(); - /* - * Due to rare timing issues, write to TIDV again to ensure + /* Due to rare timing issues, write to TIDV again to ensure * the write is successful */ ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); @@ -1169,8 +1166,7 @@ static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring) } if (adapter->detect_tx_hung) { - /* - * Detect a transmit hang in hardware, this serializes the + /* Detect a transmit hang in hardware, this serializes the * check with the clearing of time_stamp and movement of i */ adapter->detect_tx_hung = false; @@ -1270,14 +1266,12 @@ static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done, skb_put(skb, length); { - /* - * this looks ugly, but it seems compiler issues make + /* this looks ugly, but it seems compiler issues make * it more efficient than reusing j */ int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]); - /* - * page alloc/put takes too long and effects small + /* page alloc/put takes too long and effects small * packet throughput, so unsplit small packets and * save the alloc/put only valid in softirq (napi) * context to call kmap_* @@ -1288,8 +1282,7 @@ static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done, ps_page = &buffer_info->ps_pages[0]; - /* - * there is no documentation about how to call + /* there is no documentation about how to call * kmap_atomic, so we can't hold the mapping * very long */ @@ -1486,14 +1479,16 @@ static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done, skb_shinfo(rxtop)->nr_frags, buffer_info->page, 0, length); /* re-use the current skb, we only consumed the - * page */ + * 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 */ + * copybreak to save the put_page/alloc_page + */ if (length <= copybreak && skb_tailroom(skb) >= length) { u8 *vaddr; @@ -1502,7 +1497,8 @@ static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done, length); kunmap_atomic(vaddr); /* re-use the page, so don't erase - * buffer_info->page */ + * buffer_info->page + */ skb_put(skb, length); } else { skb_fill_page_desc(skb, 0, @@ -1656,22 +1652,17 @@ static irqreturn_t e1000_intr_msi(int irq, void *data) struct e1000_hw *hw = &adapter->hw; u32 icr = er32(ICR); - /* - * read ICR disables interrupts using IAM - */ - + /* read ICR disables interrupts using IAM */ if (icr & E1000_ICR_LSC) { hw->mac.get_link_status = true; - /* - * ICH8 workaround-- Call gig speed drop workaround on cable + /* ICH8 workaround-- Call gig speed drop workaround on cable * disconnect (LSC) before accessing any PHY registers */ if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && (!(er32(STATUS) & E1000_STATUS_LU))) schedule_work(&adapter->downshift_task); - /* - * 80003ES2LAN workaround-- For packet buffer work-around on + /* 80003ES2LAN workaround-- For packet buffer work-around on * link down event; disable receives here in the ISR and reset * adapter in watchdog */ @@ -1713,31 +1704,27 @@ static irqreturn_t e1000_intr(int irq, void *data) if (!icr || test_bit(__E1000_DOWN, &adapter->state)) return IRQ_NONE; /* Not our interrupt */ - /* - * IMS will not auto-mask if INT_ASSERTED is not set, and if it is + /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is * not set, then the adapter didn't send an interrupt */ if (!(icr & E1000_ICR_INT_ASSERTED)) return IRQ_NONE; - /* - * Interrupt Auto-Mask...upon reading ICR, + /* Interrupt Auto-Mask...upon reading ICR, * interrupts are masked. No need for the * IMC write */ if (icr & E1000_ICR_LSC) { hw->mac.get_link_status = true; - /* - * ICH8 workaround-- Call gig speed drop workaround on cable + /* ICH8 workaround-- Call gig speed drop workaround on cable * disconnect (LSC) before accessing any PHY registers */ if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) && (!(er32(STATUS) & E1000_STATUS_LU))) schedule_work(&adapter->downshift_task); - /* - * 80003ES2LAN workaround-- + /* 80003ES2LAN workaround-- * For packet buffer work-around on link down event; * disable receives here in the ISR and * reset adapter in watchdog @@ -2469,8 +2456,7 @@ static void e1000_set_itr(struct e1000_adapter *adapter) set_itr_now: if (new_itr != adapter->itr) { - /* - * this attempts to bias the interrupt rate towards Bulk + /* this attempts to bias the interrupt rate towards Bulk * by adding intermediate steps when interrupt rate is * increasing */ @@ -2517,7 +2503,7 @@ void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr) * e1000_alloc_queues - Allocate memory for all rings * @adapter: board private structure to initialize **/ -static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter) +static int e1000_alloc_queues(struct e1000_adapter *adapter) { int size = sizeof(struct e1000_ring); @@ -2740,8 +2726,7 @@ static void e1000_init_manageability_pt(struct e1000_adapter *adapter) manc = er32(MANC); - /* - * enable receiving management packets to the host. this will probably + /* enable receiving management packets to the host. this will probably * generate destination unreachable messages from the host OS, but * the packets will be handled on SMBUS */ @@ -2754,8 +2739,7 @@ static void e1000_init_manageability_pt(struct e1000_adapter *adapter) break; case e1000_82574: case e1000_82583: - /* - * Check if IPMI pass-through decision filter already exists; + /* Check if IPMI pass-through decision filter already exists; * if so, enable it. */ for (i = 0, j = 0; i < 8; i++) { @@ -2827,8 +2811,7 @@ static void e1000_configure_tx(struct e1000_adapter *adapter) u32 txdctl = er32(TXDCTL(0)); txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH | E1000_TXDCTL_WTHRESH); - /* - * set up some performance related parameters to encourage the + /* set up some performance related parameters to encourage the * hardware to use the bus more efficiently in bursts, depends * on the tx_int_delay to be enabled, * wthresh = 1 ==> burst write is disabled to avoid Tx stalls @@ -2845,8 +2828,7 @@ static void e1000_configure_tx(struct e1000_adapter *adapter) if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) { tarc = er32(TARC(0)); - /* - * set the speed mode bit, we'll clear it if we're not at + /* set the speed mode bit, we'll clear it if we're not at * gigabit link later */ #define SPEED_MODE_BIT (1 << 21) @@ -2967,8 +2949,7 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter) rfctl |= E1000_RFCTL_EXTEN; ew32(RFCTL, rfctl); - /* - * 82571 and greater support packet-split where the protocol + /* 82571 and greater support packet-split where the protocol * header is placed in skb->data and the packet data is * placed in pages hanging off of skb_shinfo(skb)->nr_frags. * In the case of a non-split, skb->data is linearly filled, @@ -3016,7 +2997,8 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter) /* This is useful for sniffing bad packets. */ if (adapter->netdev->features & NETIF_F_RXALL) { /* UPE and MPE will be handled by normal PROMISC logic - * in e1000e_set_rx_mode */ + * in e1000e_set_rx_mode + */ rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ E1000_RCTL_BAM | /* RX All Bcast Pkts */ E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ @@ -3071,8 +3053,7 @@ static void e1000_configure_rx(struct e1000_adapter *adapter) usleep_range(10000, 20000); if (adapter->flags2 & FLAG2_DMA_BURST) { - /* - * set the writeback threshold (only takes effect if the RDTR + /* set the writeback threshold (only takes effect if the RDTR * is set). set GRAN=1 and write back up to 0x4 worth, and * enable prefetching of 0x20 Rx descriptors * granularity = 01 @@ -3083,8 +3064,7 @@ static void e1000_configure_rx(struct e1000_adapter *adapter) ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE); ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE); - /* - * override the delay timers for enabling bursting, only if + /* override the delay timers for enabling bursting, only if * the value was not set by the user via module options */ if (adapter->rx_int_delay == DEFAULT_RDTR) @@ -3108,8 +3088,7 @@ static void e1000_configure_rx(struct e1000_adapter *adapter) ew32(CTRL_EXT, ctrl_ext); e1e_flush(); - /* - * Setup the HW Rx Head and Tail Descriptor Pointers and + /* Setup the HW Rx Head and Tail Descriptor Pointers and * the Base and Length of the Rx Descriptor Ring */ rdba = rx_ring->dma; @@ -3130,8 +3109,7 @@ static void e1000_configure_rx(struct e1000_adapter *adapter) ew32(RXCSUM, rxcsum); if (adapter->hw.mac.type == e1000_pch2lan) { - /* - * With jumbo frames, excessive C-state transition + /* With jumbo frames, excessive C-state transition * latencies result in dropped transactions. */ if (adapter->netdev->mtu > ETH_DATA_LEN) { @@ -3216,8 +3194,7 @@ static int e1000e_write_uc_addr_list(struct net_device *netdev) if (!netdev_uc_empty(netdev) && rar_entries) { struct netdev_hw_addr *ha; - /* - * write the addresses in reverse order to avoid write + /* write the addresses in reverse order to avoid write * combining */ netdev_for_each_uc_addr(ha, netdev) { @@ -3269,8 +3246,7 @@ static void e1000e_set_rx_mode(struct net_device *netdev) if (netdev->flags & IFF_ALLMULTI) { rctl |= E1000_RCTL_MPE; } else { - /* - * Write addresses to the MTA, if the attempt fails + /* Write addresses to the MTA, if the attempt fails * then we should just turn on promiscuous mode so * that we can at least receive multicast traffic */ @@ -3279,8 +3255,7 @@ static void e1000e_set_rx_mode(struct net_device *netdev) rctl |= E1000_RCTL_MPE; } e1000e_vlan_filter_enable(adapter); - /* - * Write addresses to available RAR registers, if there is not + /* Write addresses to available RAR registers, if there is not * sufficient space to store all the addresses then enable * unicast promiscuous mode */ @@ -3315,8 +3290,7 @@ static void e1000e_setup_rss_hash(struct e1000_adapter *adapter) for (i = 0; i < 32; i++) ew32(RETA(i), 0); - /* - * Disable raw packet checksumming so that RSS hash is placed in + /* Disable raw packet checksumming so that RSS hash is placed in * descriptor on writeback. */ rxcsum = er32(RXCSUM); @@ -3408,8 +3382,7 @@ void e1000e_reset(struct e1000_adapter *adapter) ew32(PBA, pba); if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { - /* - * To maintain wire speed transmits, the Tx FIFO should be + /* To maintain wire speed transmits, the Tx FIFO should be * large enough to accommodate two full transmit packets, * rounded up to the next 1KB and expressed in KB. Likewise, * the Rx FIFO should be large enough to accommodate at least @@ -3421,8 +3394,7 @@ void e1000e_reset(struct e1000_adapter *adapter) tx_space = pba >> 16; /* lower 16 bits has Rx packet buffer allocation size in KB */ pba &= 0xffff; - /* - * the Tx fifo also stores 16 bytes of information about the Tx + /* the Tx fifo also stores 16 bytes of information about the Tx * but don't include ethernet FCS because hardware appends it */ min_tx_space = (adapter->max_frame_size + @@ -3435,8 +3407,7 @@ void e1000e_reset(struct e1000_adapter *adapter) min_rx_space = ALIGN(min_rx_space, 1024); min_rx_space >>= 10; - /* - * If current Tx allocation is less than the min Tx FIFO size, + /* If current Tx allocation is less than the min Tx FIFO size, * and the min Tx FIFO size is less than the current Rx FIFO * allocation, take space away from current Rx allocation */ @@ -3444,8 +3415,7 @@ void e1000e_reset(struct e1000_adapter *adapter) ((min_tx_space - tx_space) < pba)) { pba -= min_tx_space - tx_space; - /* - * if short on Rx space, Rx wins and must trump Tx + /* if short on Rx space, Rx wins and must trump Tx * adjustment */ if (pba < min_rx_space) @@ -3455,8 +3425,7 @@ void e1000e_reset(struct e1000_adapter *adapter) ew32(PBA, pba); } - /* - * flow control settings + /* flow control settings * * The high water mark must be low enough to fit one full frame * (or the size used for early receive) above it in the Rx FIFO. @@ -3490,8 +3459,7 @@ void e1000e_reset(struct e1000_adapter *adapter) fc->low_water = fc->high_water - 8; break; case e1000_pchlan: - /* - * Workaround PCH LOM adapter hangs with certain network + /* Workaround PCH LOM adapter hangs with certain network * loads. If hangs persist, try disabling Tx flow control. */ if (adapter->netdev->mtu > ETH_DATA_LEN) { @@ -3516,8 +3484,7 @@ void e1000e_reset(struct e1000_adapter *adapter) break; } - /* - * Alignment of Tx data is on an arbitrary byte boundary with the + /* Alignment of Tx data is on an arbitrary byte boundary with the * maximum size per Tx descriptor limited only to the transmit * allocation of the packet buffer minus 96 bytes with an upper * limit of 24KB due to receive synchronization limitations. @@ -3525,8 +3492,7 @@ void e1000e_reset(struct e1000_adapter *adapter) adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96, 24 << 10); - /* - * Disable Adaptive Interrupt Moderation if 2 full packets cannot + /* Disable Adaptive Interrupt Moderation if 2 full packets cannot * fit in receive buffer. */ if (adapter->itr_setting & 0x3) { @@ -3549,8 +3515,7 @@ void e1000e_reset(struct e1000_adapter *adapter) /* Allow time for pending master requests to run */ mac->ops.reset_hw(hw); - /* - * For parts with AMT enabled, let the firmware know + /* For parts with AMT enabled, let the firmware know * that the network interface is in control */ if (adapter->flags & FLAG_HAS_AMT) @@ -3579,8 +3544,7 @@ void e1000e_reset(struct e1000_adapter *adapter) if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && !(adapter->flags & FLAG_SMART_POWER_DOWN)) { u16 phy_data = 0; - /* - * speed up time to link by disabling smart power down, ignore + /* speed up time to link by disabling smart power down, ignore * the return value of this function because there is nothing * different we would do if it failed */ @@ -3628,8 +3592,7 @@ static void e1000e_flush_descriptors(struct e1000_adapter *adapter) /* execute the writes immediately */ e1e_flush(); - /* - * due to rare timing issues, write to TIDV/RDTR again to ensure the + /* due to rare timing issues, write to TIDV/RDTR again to ensure the * write is successful */ ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD); @@ -3647,8 +3610,7 @@ void e1000e_down(struct e1000_adapter *adapter) struct e1000_hw *hw = &adapter->hw; u32 tctl, rctl; - /* - * signal that we're down so the interrupt handler does not + /* signal that we're down so the interrupt handler does not * reschedule our watchdog timer */ set_bit(__E1000_DOWN, &adapter->state); @@ -3691,8 +3653,7 @@ void e1000e_down(struct e1000_adapter *adapter) if (!pci_channel_offline(adapter->pdev)) e1000e_reset(adapter); - /* - * TODO: for power management, we could drop the link and + /* TODO: for power management, we could drop the link and * pci_disable_device here. */ } @@ -3715,7 +3676,7 @@ void e1000e_reinit_locked(struct e1000_adapter *adapter) * Fields are initialized based on PCI device information and * OS network device settings (MTU size). **/ -static int __devinit e1000_sw_init(struct e1000_adapter *adapter) +static int e1000_sw_init(struct e1000_adapter *adapter) { struct net_device *netdev = adapter->netdev; @@ -3755,8 +3716,7 @@ static irqreturn_t e1000_intr_msi_test(int irq, void *data) e_dbg("icr is %08X\n", icr); if (icr & E1000_ICR_RXSEQ) { adapter->flags &= ~FLAG_MSI_TEST_FAILED; - /* - * Force memory writes to complete before acknowledging the + /* Force memory writes to complete before acknowledging the * interrupt is handled. */ wmb(); @@ -3786,7 +3746,8 @@ static int e1000_test_msi_interrupt(struct e1000_adapter *adapter) e1000e_reset_interrupt_capability(adapter); /* Assume that the test fails, if it succeeds then the test - * MSI irq handler will unset this flag */ + * MSI irq handler will unset this flag + */ adapter->flags |= FLAG_MSI_TEST_FAILED; err = pci_enable_msi(adapter->pdev); @@ -3800,8 +3761,7 @@ static int e1000_test_msi_interrupt(struct e1000_adapter *adapter) goto msi_test_failed; } - /* - * Force memory writes to complete before enabling and firing an + /* Force memory writes to complete before enabling and firing an * interrupt. */ wmb(); @@ -3901,8 +3861,7 @@ static int e1000_open(struct net_device *netdev) if (err) goto err_setup_rx; - /* - * If AMT is enabled, let the firmware know that the network + /* If AMT is enabled, let the firmware know that the network * interface is now open and reset the part to a known state. */ if (adapter->flags & FLAG_HAS_AMT) { @@ -3923,8 +3882,7 @@ static int e1000_open(struct net_device *netdev) PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE); - /* - * before we allocate an interrupt, we must be ready to handle it. + /* before we allocate an interrupt, we must be ready to handle it. * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt * as soon as we call pci_request_irq, so we have to setup our * clean_rx handler before we do so. @@ -3935,8 +3893,7 @@ static int e1000_open(struct net_device *netdev) if (err) goto err_req_irq; - /* - * Work around PCIe errata with MSI interrupts causing some chipsets to + /* Work around PCIe errata with MSI interrupts causing some chipsets to * ignore e1000e MSI messages, which means we need to test our MSI * interrupt now */ @@ -4017,16 +3974,14 @@ static int e1000_close(struct net_device *netdev) e1000e_free_tx_resources(adapter->tx_ring); e1000e_free_rx_resources(adapter->rx_ring); - /* - * kill manageability vlan ID if supported, but not if a vlan with + /* kill manageability vlan ID if supported, but not if a vlan with * the same ID is registered on the host OS (let 8021q kill it) */ if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); - /* - * If AMT is enabled, let the firmware know that the network + /* If AMT is enabled, let the firmware know that the network * interface is now closed */ if ((adapter->flags & FLAG_HAS_AMT) && @@ -4065,8 +4020,7 @@ static int e1000_set_mac(struct net_device *netdev, void *p) /* activate the work around */ e1000e_set_laa_state_82571(&adapter->hw, 1); - /* - * Hold a copy of the LAA in RAR[14] This is done so that + /* Hold a copy of the LAA in RAR[14] This is done so that * between the time RAR[0] gets clobbered and the time it * gets fixed (in e1000_watchdog), the actual LAA is in one * of the RARs and no incoming packets directed to this port @@ -4099,10 +4053,13 @@ static void e1000e_update_phy_task(struct work_struct *work) e1000_get_phy_info(&adapter->hw); } -/* +/** + * e1000_update_phy_info - timre call-back to update PHY info + * @data: pointer to adapter cast into an unsigned long + * * Need to wait a few seconds after link up to get diagnostic information from * the phy - */ + **/ static void e1000_update_phy_info(unsigned long data) { struct e1000_adapter *adapter = (struct e1000_adapter *) data; @@ -4129,8 +4086,7 @@ static void e1000e_update_phy_stats(struct e1000_adapter *adapter) if (ret_val) return; - /* - * A page set is expensive so check if already on desired page. + /* A page set is expensive so check if already on desired page. * If not, set to the page with the PHY status registers. */ hw->phy.addr = 1; @@ -4201,8 +4157,7 @@ static void e1000e_update_stats(struct e1000_adapter *adapter) struct e1000_hw *hw = &adapter->hw; struct pci_dev *pdev = adapter->pdev; - /* - * Prevent stats update while adapter is being reset, or if the pci + /* Prevent stats update while adapter is being reset, or if the pci * connection is down. */ if (adapter->link_speed == 0) @@ -4270,8 +4225,7 @@ static void e1000e_update_stats(struct e1000_adapter *adapter) /* Rx Errors */ - /* - * RLEC on some newer hardware can be incorrect so build + /* RLEC on some newer hardware can be incorrect so build * our own version based on RUC and ROC */ netdev->stats.rx_errors = adapter->stats.rxerrc + @@ -4323,8 +4277,7 @@ static void e1000_phy_read_status(struct e1000_adapter *adapter) if (ret_val) e_warn("Error reading PHY register\n"); } else { - /* - * Do not read PHY registers if link is not up + /* Do not read PHY registers if link is not up * Set values to typical power-on defaults */ phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX); @@ -4362,8 +4315,7 @@ static bool e1000e_has_link(struct e1000_adapter *adapter) bool link_active = false; s32 ret_val = 0; - /* - * get_link_status is set on LSC (link status) interrupt or + /* get_link_status is set on LSC (link status) interrupt or * Rx sequence error interrupt. get_link_status will stay * false until the check_for_link establishes link * for copper adapters ONLY @@ -4415,8 +4367,7 @@ static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter) { struct e1000_hw *hw = &adapter->hw; - /* - * With 82574 controllers, PHY needs to be checked periodically + /* With 82574 controllers, PHY needs to be checked periodically * for hung state and reset, if two calls return true */ if (e1000_check_phy_82574(hw)) @@ -4484,8 +4435,7 @@ static void e1000_watchdog_task(struct work_struct *work) &adapter->link_speed, &adapter->link_duplex); e1000_print_link_info(adapter); - /* - * On supported PHYs, check for duplex mismatch only + /* On supported PHYs, check for duplex mismatch only * if link has autonegotiated at 10/100 half */ if ((hw->phy.type == e1000_phy_igp_3 || @@ -4515,8 +4465,7 @@ static void e1000_watchdog_task(struct work_struct *work) break; } - /* - * workaround: re-program speed mode bit after + /* workaround: re-program speed mode bit after * link-up event */ if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) && @@ -4527,8 +4476,7 @@ static void e1000_watchdog_task(struct work_struct *work) ew32(TARC(0), tarc0); } - /* - * disable TSO for pcie and 10/100 speeds, to avoid + /* disable TSO for pcie and 10/100 speeds, to avoid * some hardware issues */ if (!(adapter->flags & FLAG_TSO_FORCE)) { @@ -4549,16 +4497,14 @@ static void e1000_watchdog_task(struct work_struct *work) } } - /* - * enable transmits in the hardware, need to do this + /* enable transmits in the hardware, need to do this * after setting TARC(0) */ tctl = er32(TCTL); tctl |= E1000_TCTL_EN; ew32(TCTL, tctl); - /* - * Perform any post-link-up configuration before + /* Perform any post-link-up configuration before * reporting link up. */ if (phy->ops.cfg_on_link_up) @@ -4609,8 +4555,7 @@ link_up: if (!netif_carrier_ok(netdev) && (e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) { - /* - * We've lost link, so the controller stops DMA, + /* We've lost link, so the controller stops DMA, * but we've got queued Tx work that's never going * to get done, so reset controller to flush Tx. * (Do the reset outside of interrupt context). @@ -4622,8 +4567,7 @@ link_up: /* Simple mode for Interrupt Throttle Rate (ITR) */ if (adapter->itr_setting == 4) { - /* - * Symmetric Tx/Rx gets a reduced ITR=2000; + /* Symmetric Tx/Rx gets a reduced ITR=2000; * Total asymmetrical Tx or Rx gets ITR=8000; * everyone else is between 2000-8000. */ @@ -4648,8 +4592,7 @@ link_up: /* Force detection of hung controller every watchdog period */ adapter->detect_tx_hung = true; - /* - * With 82571 controllers, LAA may be overwritten due to controller + /* With 82571 controllers, LAA may be overwritten due to controller * reset from the other port. Set the appropriate LAA in RAR[0] */ if (e1000e_get_laa_state_82571(hw)) @@ -4948,8 +4891,7 @@ static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count) if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); - /* - * Force memory writes to complete before letting h/w + /* 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). @@ -4963,8 +4905,7 @@ static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count) else writel(i, tx_ring->tail); - /* - * we need this if more than one processor can write to our tail + /* we need this if more than one processor can write to our tail * at a time, it synchronizes IO on IA64/Altix systems */ mmiowb(); @@ -5014,15 +4955,13 @@ static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size) struct e1000_adapter *adapter = tx_ring->adapter; netif_stop_queue(adapter->netdev); - /* - * Herbert's original patch had: + /* Herbert's original patch had: * smp_mb__after_netif_stop_queue(); * but since that doesn't exist yet, just open code it. */ smp_mb(); - /* - * We need to check again in a case another CPU has just + /* We need to check again in a case another CPU has just * made room available. */ if (e1000_desc_unused(tx_ring) < size) @@ -5067,18 +5006,26 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, return NETDEV_TX_OK; } + /* The minimum packet size with TCTL.PSP set is 17 bytes so + * pad skb in order to meet this minimum size requirement + */ + if (unlikely(skb->len < 17)) { + if (skb_pad(skb, 17 - skb->len)) + return NETDEV_TX_OK; + skb->len = 17; + skb_set_tail_pointer(skb, 17); + } + mss = skb_shinfo(skb)->gso_size; if (mss) { u8 hdr_len; - /* - * TSO Workaround for 82571/2/3 Controllers -- if skb->data + /* TSO Workaround for 82571/2/3 Controllers -- if skb->data * points to just header, pull a few bytes of payload from * frags into skb->data */ hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); - /* - * we do this workaround for ES2LAN, but it is un-necessary, + /* we do this workaround for ES2LAN, but it is un-necessary, * avoiding it could save a lot of cycles */ if (skb->data_len && (hdr_len == len)) { @@ -5109,8 +5056,7 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, if (adapter->hw.mac.tx_pkt_filtering) e1000_transfer_dhcp_info(adapter, skb); - /* - * need: count + 2 desc gap to keep tail from touching + /* need: count + 2 desc gap to keep tail from touching * head, otherwise try next time */ if (e1000_maybe_stop_tx(tx_ring, count + 2)) @@ -5134,8 +5080,7 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, else if (e1000_tx_csum(tx_ring, skb)) tx_flags |= E1000_TX_FLAGS_CSUM; - /* - * Old method was to assume IPv4 packet by default if TSO was enabled. + /* Old method was to assume IPv4 packet by default if TSO was enabled. * 82571 hardware supports TSO capabilities for IPv6 as well... * no longer assume, we must. */ @@ -5222,8 +5167,7 @@ struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev, /* Rx Errors */ - /* - * RLEC on some newer hardware can be incorrect so build + /* RLEC on some newer hardware can be incorrect so build * our own version based on RUC and ROC */ stats->rx_errors = adapter->stats.rxerrc + @@ -5292,8 +5236,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu) if (netif_running(netdev)) e1000e_down(adapter); - /* - * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN + /* 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 @@ -5555,8 +5498,7 @@ static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake, if (adapter->hw.phy.type == e1000_phy_igp_3) e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw); - /* - * Release control of h/w to f/w. If f/w is AMT enabled, this + /* Release control of h/w to f/w. If f/w is AMT enabled, this * would have already happened in close and is redundant. */ e1000e_release_hw_control(adapter); @@ -5583,8 +5525,7 @@ static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep, struct net_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev_priv(netdev); - /* - * The pci-e switch on some quad port adapters will report a + /* The pci-e switch on some quad port adapters will report a * correctable error when the MAC transitions from D0 to D3. To * prevent this we need to mask off the correctable errors on the * downstream port of the pci-e switch. @@ -5613,8 +5554,7 @@ static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state) #else static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state) { - /* - * Both device and parent should have the same ASPM setting. + /* Both device and parent should have the same ASPM setting. * Disable ASPM in downstream component first and then upstream. */ pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, state); @@ -5708,8 +5648,7 @@ static int __e1000_resume(struct pci_dev *pdev) netif_device_attach(netdev); - /* - * If the controller has AMT, do not set DRV_LOAD until the interface + /* If the controller has AMT, do not set DRV_LOAD until the interface * is up. For all other cases, let the f/w know that the h/w is now * under the control of the driver. */ @@ -5837,7 +5776,10 @@ static irqreturn_t e1000_intr_msix(int irq, void *data) return IRQ_HANDLED; } -/* +/** + * e1000_netpoll + * @netdev: network interface device structure + * * Polling 'interrupt' - used by things like netconsole to send skbs * without having to re-enable interrupts. It's not called while * the interrupt routine is executing. @@ -5962,8 +5904,7 @@ static void e1000_io_resume(struct pci_dev *pdev) netif_device_attach(netdev); - /* - * If the controller has AMT, do not set DRV_LOAD until the interface + /* If the controller has AMT, do not set DRV_LOAD until the interface * is up. For all other cases, let the f/w know that the h/w is now * under the control of the driver. */ @@ -6083,8 +6024,7 @@ static const struct net_device_ops e1000e_netdev_ops = { * The OS initialization, configuring of the adapter private structure, * and a hardware reset occur. **/ -static int __devinit e1000_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) +static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct net_device *netdev; struct e1000_adapter *adapter; @@ -6262,14 +6202,12 @@ static int __devinit e1000_probe(struct pci_dev *pdev, if (e1000e_enable_mng_pass_thru(&adapter->hw)) adapter->flags |= FLAG_MNG_PT_ENABLED; - /* - * before reading the NVM, reset the controller to + /* before reading the NVM, reset the controller to * put the device in a known good starting state */ adapter->hw.mac.ops.reset_hw(&adapter->hw); - /* - * systems with ASPM and others may see the checksum fail on the first + /* systems with ASPM and others may see the checksum fail on the first * attempt. Let's give it a few tries */ for (i = 0;; i++) { @@ -6324,8 +6262,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev, adapter->rx_ring->count = E1000_DEFAULT_RXD; adapter->tx_ring->count = E1000_DEFAULT_TXD; - /* - * Initial Wake on LAN setting - If APM wake is enabled in + /* Initial Wake on LAN setting - If APM wake is enabled in * the EEPROM, enable the ACPI Magic Packet filter */ if (adapter->flags & FLAG_APME_IN_WUC) { @@ -6349,8 +6286,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev, if (eeprom_data & eeprom_apme_mask) adapter->eeprom_wol |= E1000_WUFC_MAG; - /* - * now that we have the eeprom settings, apply the special cases + /* now that we have the eeprom settings, apply the special cases * where the eeprom may be wrong or the board simply won't support * wake on lan on a particular port */ @@ -6367,8 +6303,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev, /* reset the hardware with the new settings */ e1000e_reset(adapter); - /* - * If the controller has AMT, do not set DRV_LOAD until the interface + /* If the controller has AMT, do not set DRV_LOAD until the interface * is up. For all other cases, let the f/w know that the h/w is now * under the control of the driver. */ @@ -6425,14 +6360,13 @@ err_dma: * Hot-Plug event, or because the driver is going to be removed from * memory. **/ -static void __devexit e1000_remove(struct pci_dev *pdev) +static void e1000_remove(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev_priv(netdev); bool down = test_bit(__E1000_DOWN, &adapter->state); - /* - * The timers may be rescheduled, so explicitly disable them + /* The timers may be rescheduled, so explicitly disable them * from being rescheduled. */ if (!down) @@ -6457,8 +6391,7 @@ static void __devexit e1000_remove(struct pci_dev *pdev) if (pci_dev_run_wake(pdev)) pm_runtime_get_noresume(&pdev->dev); - /* - * Release control of h/w to f/w. If f/w is AMT enabled, this + /* Release control of h/w to f/w. If f/w is AMT enabled, this * would have already happened in close and is redundant. */ e1000e_release_hw_control(adapter); @@ -6578,7 +6511,7 @@ static struct pci_driver e1000_driver = { .name = e1000e_driver_name, .id_table = e1000_pci_tbl, .probe = e1000_probe, - .remove = __devexit_p(e1000_remove), + .remove = e1000_remove, #ifdef CONFIG_PM .driver = { .pm = &e1000_pm_ops, |
