diff options
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_main.c')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_main.c | 3871 |
1 files changed, 0 insertions, 3871 deletions
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c deleted file mode 100644 index a417be7f8be..00000000000 --- a/drivers/net/ixgbe/ixgbe_main.c +++ /dev/null @@ -1,3871 +0,0 @@ -/******************************************************************************* - - Intel 10 Gigabit PCI Express Linux driver - Copyright(c) 1999 - 2007 Intel Corporation. - - This program is free software; you can redistribute it and/or modify it - under the terms and conditions of the GNU General Public License, - version 2, as published by the Free Software Foundation. - - This program is distributed in the hope it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - more details. - - You should have received a copy of the GNU General Public License along with - this program; if not, write to the Free Software Foundation, Inc., - 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - - The full GNU General Public License is included in this distribution in - the file called "COPYING". - - Contact Information: - Linux NICS <linux.nics@intel.com> - e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> - Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - -*******************************************************************************/ - -#include <linux/types.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/netdevice.h> -#include <linux/vmalloc.h> -#include <linux/string.h> -#include <linux/in.h> -#include <linux/ip.h> -#include <linux/tcp.h> -#include <linux/ipv6.h> -#include <net/checksum.h> -#include <net/ip6_checksum.h> -#include <linux/ethtool.h> -#include <linux/if_vlan.h> - -#include "ixgbe.h" -#include "ixgbe_common.h" - -char ixgbe_driver_name[] = "ixgbe"; -static const char ixgbe_driver_string[] = - "Intel(R) 10 Gigabit PCI Express Network Driver"; - -#define DRV_VERSION "1.3.18-k4" -const char ixgbe_driver_version[] = DRV_VERSION; -static const char ixgbe_copyright[] = - "Copyright (c) 1999-2007 Intel Corporation."; - -static const struct ixgbe_info *ixgbe_info_tbl[] = { - [board_82598] = &ixgbe_82598_info, -}; - -/* ixgbe_pci_tbl - PCI Device ID Table - * - * Wildcard entries (PCI_ANY_ID) should come last - * Last entry must be all 0s - * - * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, - * Class, Class Mask, private data (not used) } - */ -static struct pci_device_id ixgbe_pci_tbl[] = { - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), - board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), - board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), - board_82598 }, - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), - board_82598 }, - - /* required last entry */ - {0, } -}; -MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl); - -#ifdef CONFIG_DCA -static int ixgbe_notify_dca(struct notifier_block *, unsigned long event, - void *p); -static struct notifier_block dca_notifier = { - .notifier_call = ixgbe_notify_dca, - .next = NULL, - .priority = 0 -}; -#endif - -MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); -MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_VERSION); - -#define DEFAULT_DEBUG_LEVEL_SHIFT 3 - -static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter) -{ - u32 ctrl_ext; - - /* Let firmware take over control of h/w */ - ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, - ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD); -} - -static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter) -{ - u32 ctrl_ext; - - /* Let firmware know the driver has taken over */ - ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, - ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD); -} - -#ifdef DEBUG -/** - * ixgbe_get_hw_dev_name - return device name string - * used by hardware layer to print debugging information - **/ -char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw) -{ - struct ixgbe_adapter *adapter = hw->back; - struct net_device *netdev = adapter->netdev; - return netdev->name; -} -#endif - -static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry, - u8 msix_vector) -{ - u32 ivar, index; - - msix_vector |= IXGBE_IVAR_ALLOC_VAL; - index = (int_alloc_entry >> 2) & 0x1F; - ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index)); - ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3))); - ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3))); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar); -} - -static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter, - struct ixgbe_tx_buffer - *tx_buffer_info) -{ - if (tx_buffer_info->dma) { - pci_unmap_page(adapter->pdev, - tx_buffer_info->dma, - tx_buffer_info->length, PCI_DMA_TODEVICE); - tx_buffer_info->dma = 0; - } - if (tx_buffer_info->skb) { - dev_kfree_skb_any(tx_buffer_info->skb); - tx_buffer_info->skb = NULL; - } - /* tx_buffer_info must be completely set up in the transmit path */ -} - -static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring, - unsigned int eop, - union ixgbe_adv_tx_desc *eop_desc) -{ - /* 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; - if (tx_ring->tx_buffer_info[eop].dma && - time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) && - !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) { - /* detected Tx unit hang */ - DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n" - " TDH <%x>\n" - " TDT <%x>\n" - " next_to_use <%x>\n" - " next_to_clean <%x>\n" - "tx_buffer_info[next_to_clean]\n" - " time_stamp <%lx>\n" - " next_to_watch <%x>\n" - " jiffies <%lx>\n" - " next_to_watch.status <%x>\n", - readl(adapter->hw.hw_addr + tx_ring->head), - readl(adapter->hw.hw_addr + tx_ring->tail), - tx_ring->next_to_use, - tx_ring->next_to_clean, - tx_ring->tx_buffer_info[eop].time_stamp, - eop, jiffies, eop_desc->wb.status); - return true; - } - - return false; -} - -#define IXGBE_MAX_TXD_PWR 14 -#define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR) - -/* Tx Descriptors needed, worst case */ -#define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \ - (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) -#define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \ - MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */ - -/** - * ixgbe_clean_tx_irq - Reclaim resources after transmit completes - * @adapter: board private structure - **/ -static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring) -{ - struct net_device *netdev = adapter->netdev; - union ixgbe_adv_tx_desc *tx_desc, *eop_desc; - struct ixgbe_tx_buffer *tx_buffer_info; - unsigned int i, eop; - bool cleaned = false; - unsigned int total_tx_bytes = 0, total_tx_packets = 0; - - i = tx_ring->next_to_clean; - eop = tx_ring->tx_buffer_info[i].next_to_watch; - eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); - while (eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) { - cleaned = false; - while (!cleaned) { - tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i); - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - cleaned = (i == eop); - - tx_ring->stats.bytes += tx_buffer_info->length; - if (cleaned) { - struct sk_buff *skb = tx_buffer_info->skb; - unsigned int segs, bytecount; - segs = skb_shinfo(skb)->gso_segs ?: 1; - /* multiply data chunks by size of headers */ - bytecount = ((segs - 1) * skb_headlen(skb)) + - skb->len; - total_tx_packets += segs; - total_tx_bytes += bytecount; - } - ixgbe_unmap_and_free_tx_resource(adapter, - tx_buffer_info); - tx_desc->wb.status = 0; - - i++; - if (i == tx_ring->count) - i = 0; - } - - tx_ring->stats.packets++; - - eop = tx_ring->tx_buffer_info[i].next_to_watch; - eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); - - /* weight of a sort for tx, avoid endless transmit cleanup */ - if (total_tx_packets >= tx_ring->work_limit) - break; - } - - tx_ring->next_to_clean = i; - -#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) - if (total_tx_packets && netif_carrier_ok(netdev) && - (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) { - /* Make sure that anybody stopping the queue after this - * sees the new next_to_clean. - */ - smp_mb(); - if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) && - !test_bit(__IXGBE_DOWN, &adapter->state)) { - netif_wake_subqueue(netdev, tx_ring->queue_index); - adapter->restart_queue++; - } - } - - if (adapter->detect_tx_hung) - if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc)) - netif_stop_subqueue(netdev, tx_ring->queue_index); - - if (total_tx_packets >= tx_ring->work_limit) - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value); - - tx_ring->total_bytes += total_tx_bytes; - tx_ring->total_packets += total_tx_packets; - adapter->net_stats.tx_bytes += total_tx_bytes; - adapter->net_stats.tx_packets += total_tx_packets; - cleaned = total_tx_packets ? true : false; - return cleaned; -} - -#ifdef CONFIG_DCA -static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rxr) -{ - u32 rxctrl; - int cpu = get_cpu(); - int q = rxr - adapter->rx_ring; - - if (rxr->cpu != cpu) { - rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q)); - rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK; - rxctrl |= dca_get_tag(cpu); - rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN; - rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl); - rxr->cpu = cpu; - } - put_cpu(); -} - -static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter, - struct ixgbe_ring *txr) -{ - u32 txctrl; - int cpu = get_cpu(); - int q = txr - adapter->tx_ring; - - if (txr->cpu != cpu) { - txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q)); - txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK; - txctrl |= dca_get_tag(cpu); - txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl); - txr->cpu = cpu; - } - put_cpu(); -} - -static void ixgbe_setup_dca(struct ixgbe_adapter *adapter) -{ - int i; - - if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED)) - return; - - for (i = 0; i < adapter->num_tx_queues; i++) { - adapter->tx_ring[i].cpu = -1; - ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]); - } - for (i = 0; i < adapter->num_rx_queues; i++) { - adapter->rx_ring[i].cpu = -1; - ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]); - } -} - -static int __ixgbe_notify_dca(struct device *dev, void *data) -{ - struct net_device *netdev = dev_get_drvdata(dev); - struct ixgbe_adapter *adapter = netdev_priv(netdev); - unsigned long event = *(unsigned long *)data; - - switch (event) { - case DCA_PROVIDER_ADD: - adapter->flags |= IXGBE_FLAG_DCA_ENABLED; - /* Always use CB2 mode, difference is masked - * in the CB driver. */ - IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2); - if (dca_add_requester(dev) == 0) { - ixgbe_setup_dca(adapter); - break; - } - /* Fall Through since DCA is disabled. */ - case DCA_PROVIDER_REMOVE: - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { - dca_remove_requester(dev); - adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1); - } - break; - } - - return 0; -} - -#endif /* CONFIG_DCA */ -/** - * ixgbe_receive_skb - Send a completed packet up the stack - * @adapter: board private structure - * @skb: packet to send up - * @status: hardware indication of status of receive - * @rx_ring: rx descriptor ring (for a specific queue) to setup - * @rx_desc: rx descriptor - **/ -static void ixgbe_receive_skb(struct ixgbe_adapter *adapter, - struct sk_buff *skb, u8 status, - struct ixgbe_ring *ring, - union ixgbe_adv_rx_desc *rx_desc) -{ - bool is_vlan = (status & IXGBE_RXD_STAT_VP); - u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan); - - if (adapter->netdev->features & NETIF_F_LRO && - skb->ip_summed == CHECKSUM_UNNECESSARY) { - if (adapter->vlgrp && is_vlan) - lro_vlan_hwaccel_receive_skb(&ring->lro_mgr, skb, - adapter->vlgrp, tag, - rx_desc); - else - lro_receive_skb(&ring->lro_mgr, skb, rx_desc); - ring->lro_used = true; - } else { - if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) { - if (adapter->vlgrp && is_vlan) - vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag); - else - netif_receive_skb(skb); - } else { - if (adapter->vlgrp && is_vlan) - vlan_hwaccel_rx(skb, adapter->vlgrp, tag); - else - netif_rx(skb); - } - } -} - -/** - * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum - * @adapter: address of board private structure - * @status_err: hardware indication of status of receive - * @skb: skb currently being received and modified - **/ -static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter, - u32 status_err, - struct sk_buff *skb) -{ - skb->ip_summed = CHECKSUM_NONE; - - /* Ignore Checksum bit is set, or rx csum disabled */ - if ((status_err & IXGBE_RXD_STAT_IXSM) || - !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED)) - return; - - /* if IP and error */ - if ((status_err & IXGBE_RXD_STAT_IPCS) && - (status_err & IXGBE_RXDADV_ERR_IPE)) { - adapter->hw_csum_rx_error++; - return; - } - - if (!(status_err & IXGBE_RXD_STAT_L4CS)) - return; - - if (status_err & IXGBE_RXDADV_ERR_TCPE) { - adapter->hw_csum_rx_error++; - return; - } - - /* It must be a TCP or UDP packet with a valid checksum */ - skb->ip_summed = CHECKSUM_UNNECESSARY; - adapter->hw_csum_rx_good++; -} - -/** - * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split - * @adapter: address of board private structure - **/ -static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rx_ring, - int cleaned_count) -{ - struct net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - union ixgbe_adv_rx_desc *rx_desc; - struct ixgbe_rx_buffer *rx_buffer_info; - struct sk_buff *skb; - unsigned int i; - unsigned int bufsz = adapter->rx_buf_len + NET_IP_ALIGN; - - i = rx_ring->next_to_use; - rx_buffer_info = &rx_ring->rx_buffer_info[i]; - - while (cleaned_count--) { - rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i); - - if (!rx_buffer_info->page && - (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) { - rx_buffer_info->page = alloc_page(GFP_ATOMIC); - if (!rx_buffer_info->page) { - adapter->alloc_rx_page_failed++; - goto no_buffers; - } - rx_buffer_info->page_dma = - pci_map_page(pdev, rx_buffer_info->page, - 0, PAGE_SIZE, PCI_DMA_FROMDEVICE); - } - - if (!rx_buffer_info->skb) { - skb = netdev_alloc_skb(netdev, bufsz); - - if (!skb) { - adapter->alloc_rx_buff_failed++; - goto no_buffers; - } - - /* - * 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); - - rx_buffer_info->skb = skb; - rx_buffer_info->dma = pci_map_single(pdev, skb->data, - bufsz, - PCI_DMA_FROMDEVICE); - } - /* Refresh the desc even if buffer_addrs didn't change because - * each write-back erases this info. */ - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - rx_desc->read.pkt_addr = - cpu_to_le64(rx_buffer_info->page_dma); - rx_desc->read.hdr_addr = - cpu_to_le64(rx_buffer_info->dma); - } else { - rx_desc->read.pkt_addr = - cpu_to_le64(rx_buffer_info->dma); - } - - i++; - if (i == rx_ring->count) - i = 0; - rx_buffer_info = &rx_ring->rx_buffer_info[i]; - } -no_buffers: - if (rx_ring->next_to_use != i) { - rx_ring->next_to_use = i; - if (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->tail); - } -} - -static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rx_ring, - int *work_done, int work_to_do) -{ - struct net_device *netdev = adapter->netdev; - struct pci_dev *pdev = adapter->pdev; - union ixgbe_adv_rx_desc *rx_desc, *next_rxd; - struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer; - struct sk_buff *skb; - unsigned int i; - u32 upper_len, len, staterr; - u16 hdr_info; - bool cleaned = false; - int cleaned_count = 0; - unsigned int total_rx_bytes = 0, total_rx_packets = 0; - - i = rx_ring->next_to_clean; - upper_len = 0; - rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i); - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - rx_buffer_info = &rx_ring->rx_buffer_info[i]; - - while (staterr & IXGBE_RXD_STAT_DD) { - if (*work_done >= work_to_do) - break; - (*work_done)++; - - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - hdr_info = - le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info); - len = - ((hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >> - IXGBE_RXDADV_HDRBUFLEN_SHIFT); - if (hdr_info & IXGBE_RXDADV_SPH) - adapter->rx_hdr_split++; - if (len > IXGBE_RX_HDR_SIZE) - len = IXGBE_RX_HDR_SIZE; - upper_len = le16_to_cpu(rx_desc->wb.upper.length); - } else - len = le16_to_cpu(rx_desc->wb.upper.length); - - cleaned = true; - skb = rx_buffer_info->skb; - prefetch(skb->data - NET_IP_ALIGN); - rx_buffer_info->skb = NULL; - - if (len && !skb_shinfo(skb)->nr_frags) { - pci_unmap_single(pdev, rx_buffer_info->dma, - adapter->rx_buf_len + NET_IP_ALIGN, - PCI_DMA_FROMDEVICE); - skb_put(skb, len); - } - - if (upper_len) { - pci_unmap_page(pdev, rx_buffer_info->page_dma, - PAGE_SIZE, PCI_DMA_FROMDEVICE); - rx_buffer_info->page_dma = 0; - skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, - rx_buffer_info->page, 0, upper_len); - rx_buffer_info->page = NULL; - - skb->len += upper_len; - skb->data_len += upper_len; - skb->truesize += upper_len; - } - - i++; - if (i == rx_ring->count) - i = 0; - next_buffer = &rx_ring->rx_buffer_info[i]; - - next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i); - prefetch(next_rxd); - - cleaned_count++; - if (staterr & IXGBE_RXD_STAT_EOP) { - rx_ring->stats.packets++; - rx_ring->stats.bytes += skb->len; - } else { - rx_buffer_info->skb = next_buffer->skb; - rx_buffer_info->dma = next_buffer->dma; - next_buffer->skb = skb; - adapter->non_eop_descs++; - goto next_desc; - } - - if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) { - dev_kfree_skb_irq(skb); - goto next_desc; - } - - ixgbe_rx_checksum(adapter, staterr, skb); - - /* probably a little skewed due to removing CRC */ - total_rx_bytes += skb->len; - total_rx_packets++; - - skb->protocol = eth_type_trans(skb, netdev); - ixgbe_receive_skb(adapter, skb, staterr, rx_ring, rx_desc); - netdev->last_rx = jiffies; - -next_desc: - rx_desc->wb.upper.status_error = 0; - - /* return some buffers to hardware, one at a time is too slow */ - if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) { - ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count); - cleaned_count = 0; - } - - /* use prefetched values */ - rx_desc = next_rxd; - rx_buffer_info = next_buffer; - - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - } - - if (rx_ring->lro_used) { - lro_flush_all(&rx_ring->lro_mgr); - rx_ring->lro_used = false; - } - - rx_ring->next_to_clean = i; - cleaned_count = IXGBE_DESC_UNUSED(rx_ring); - - if (cleaned_count) - ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count); - - adapter->net_stats.rx_bytes += total_rx_bytes; - adapter->net_stats.rx_packets += total_rx_packets; - - rx_ring->total_packets += total_rx_packets; - rx_ring->total_bytes += total_rx_bytes; - adapter->net_stats.rx_bytes += total_rx_bytes; - adapter->net_stats.rx_packets += total_rx_packets; - - return cleaned; -} - -static int ixgbe_clean_rxonly(struct napi_struct *, int); -/** - * ixgbe_configure_msix - Configure MSI-X hardware - * @adapter: board private structure - * - * ixgbe_configure_msix sets up the hardware to properly generate MSI-X - * interrupts. - **/ -static void ixgbe_configure_msix(struct ixgbe_adapter *adapter) -{ - struct ixgbe_q_vector *q_vector; - int i, j, q_vectors, v_idx, r_idx; - u32 mask; - - q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* Populate the IVAR table and set the ITR values to the - * corresponding register. - */ - for (v_idx = 0; v_idx < q_vectors; v_idx++) { - q_vector = &adapter->q_vector[v_idx]; - /* XXX for_each_bit(...) */ - r_idx = find_first_bit(q_vector->rxr_idx, - adapter->num_rx_queues); - - for (i = 0; i < q_vector->rxr_count; i++) { - j = adapter->rx_ring[r_idx].reg_idx; - ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(j), v_idx); - r_idx = find_next_bit(q_vector->rxr_idx, - adapter->num_rx_queues, - r_idx + 1); - } - r_idx = find_first_bit(q_vector->txr_idx, - adapter->num_tx_queues); - - for (i = 0; i < q_vector->txr_count; i++) { - j = adapter->tx_ring[r_idx].reg_idx; - ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(j), v_idx); - r_idx = find_next_bit(q_vector->txr_idx, - adapter->num_tx_queues, - r_idx + 1); - } - - /* if this is a tx only vector use half the irq (tx) rate */ - if (q_vector->txr_count && !q_vector->rxr_count) - q_vector->eitr = adapter->tx_eitr; - else - /* rx only or mixed */ - q_vector->eitr = adapter->rx_eitr; - - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), - EITR_INTS_PER_SEC_TO_REG(q_vector->eitr)); - } - - ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX, v_idx); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950); - - /* set up to autoclear timer, lsc, and the vectors */ - mask = IXGBE_EIMS_ENABLE_MASK; - mask &= ~IXGBE_EIMS_OTHER; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask); -} - -enum latency_range { - lowest_latency = 0, - low_latency = 1, - bulk_latency = 2, - latency_invalid = 255 -}; - -/** - * ixgbe_update_itr - update the dynamic ITR value based on statistics - * @adapter: pointer to adapter - * @eitr: eitr setting (ints per sec) to give last timeslice - * @itr_setting: current throttle rate in ints/second - * @packets: the number of packets during this measurement interval - * @bytes: the number of bytes during this measurement interval - * - * Stores a new ITR value based on packets and byte - * counts during the last interrupt. The advantage of per interrupt - * computation is faster updates and more accurate ITR for the current - * traffic pattern. Constants in this function were computed - * based on theoretical maximum wire speed and thresholds were set based - * on testing data as well as attempting to minimize response time - * while increasing bulk throughput. - * this functionality is controlled by the InterruptThrottleRate module - * parameter (see ixgbe_param.c) - **/ -static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter, - u32 eitr, u8 itr_setting, - int packets, int bytes) -{ - unsigned int retval = itr_setting; - u32 timepassed_us; - u64 bytes_perint; - - if (packets == 0) - goto update_itr_done; - - - /* simple throttlerate management - * 0-20MB/s lowest (100000 ints/s) - * 20-100MB/s low (20000 ints/s) - * 100-1249MB/s bulk (8000 ints/s) - */ - /* what was last interrupt timeslice? */ - timepassed_us = 1000000/eitr; - bytes_perint = bytes / timepassed_us; /* bytes/usec */ - - switch (itr_setting) { - case lowest_latency: - if (bytes_perint > adapter->eitr_low) - retval = low_latency; - break; - case low_latency: - if (bytes_perint > adapter->eitr_high) - retval = bulk_latency; - else if (bytes_perint <= adapter->eitr_low) - retval = lowest_latency; - break; - case bulk_latency: - if (bytes_perint <= adapter->eitr_high) - retval = low_latency; - break; - } - -update_itr_done: - return retval; -} - -static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector) -{ - struct ixgbe_adapter *adapter = q_vector->adapter; - struct ixgbe_hw *hw = &adapter->hw; - u32 new_itr; - u8 current_itr, ret_itr; - int i, r_idx, v_idx = ((void *)q_vector - (void *)(adapter->q_vector)) / - sizeof(struct ixgbe_q_vector); - struct ixgbe_ring *rx_ring, *tx_ring; - - r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues); - for (i = 0; i < q_vector->txr_count; i++) { - tx_ring = &(adapter->tx_ring[r_idx]); - ret_itr = ixgbe_update_itr(adapter, q_vector->eitr, - q_vector->tx_eitr, - tx_ring->total_packets, - tx_ring->total_bytes); - /* if the result for this queue would decrease interrupt - * rate for this vector then use that result */ - q_vector->tx_eitr = ((q_vector->tx_eitr > ret_itr) ? - q_vector->tx_eitr - 1 : ret_itr); - r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues, - r_idx + 1); - } - - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - for (i = 0; i < q_vector->rxr_count; i++) { - rx_ring = &(adapter->rx_ring[r_idx]); - ret_itr = ixgbe_update_itr(adapter, q_vector->eitr, - q_vector->rx_eitr, - rx_ring->total_packets, - rx_ring->total_bytes); - /* if the result for this queue would decrease interrupt - * rate for this vector then use that result */ - q_vector->rx_eitr = ((q_vector->rx_eitr > ret_itr) ? - q_vector->rx_eitr - 1 : ret_itr); - r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues, - r_idx + 1); - } - - current_itr = max(q_vector->rx_eitr, q_vector->tx_eitr); - - switch (current_itr) { - /* counts and packets in update_itr are dependent on these numbers */ - case lowest_latency: - new_itr = 100000; - break; - case low_latency: - new_itr = 20000; /* aka hwitr = ~200 */ - break; - case bulk_latency: - default: - new_itr = 8000; - break; - } - - if (new_itr != q_vector->eitr) { - u32 itr_reg; - /* do an exponential smoothing */ - new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100); - q_vector->eitr = new_itr; - itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr); - /* must write high and low 16 bits to reset counter */ - DPRINTK(TX_ERR, DEBUG, "writing eitr(%d): %08X\n", v_idx, - itr_reg); - IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg | (itr_reg)<<16); - } - - return; -} - -static irqreturn_t ixgbe_msix_lsc(int irq, void *data) -{ - struct net_device *netdev = data; - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR); - - if (eicr & IXGBE_EICR_LSC) { - adapter->lsc_int++; - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - mod_timer(&adapter->watchdog_timer, jiffies); - } - - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER); - - return IRQ_HANDLED; -} - -static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data) -{ - struct ixgbe_q_vector *q_vector = data; - struct ixgbe_adapter *adapter = q_vector->adapter; - struct ixgbe_ring *txr; - int i, r_idx; - - if (!q_vector->txr_count) - return IRQ_HANDLED; - - r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues); - for (i = 0; i < q_vector->txr_count; i++) { - txr = &(adapter->tx_ring[r_idx]); -#ifdef CONFIG_DCA - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) - ixgbe_update_tx_dca(adapter, txr); -#endif - txr->total_bytes = 0; - txr->total_packets = 0; - ixgbe_clean_tx_irq(adapter, txr); - r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues, - r_idx + 1); - } - - return IRQ_HANDLED; -} - -/** - * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues) - * @irq: unused - * @data: pointer to our q_vector struct for this interrupt vector - **/ -static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data) -{ - struct ixgbe_q_vector *q_vector = data; - struct ixgbe_adapter *adapter = q_vector->adapter; - struct ixgbe_ring *rxr; - int r_idx; - - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - if (!q_vector->rxr_count) - return IRQ_HANDLED; - - rxr = &(adapter->rx_ring[r_idx]); - /* disable interrupts on this vector only */ - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rxr->v_idx); - rxr->total_bytes = 0; - rxr->total_packets = 0; - netif_rx_schedule(adapter->netdev, &q_vector->napi); - - return IRQ_HANDLED; -} - -static irqreturn_t ixgbe_msix_clean_many(int irq, void *data) -{ - ixgbe_msix_clean_rx(irq, data); - ixgbe_msix_clean_tx(irq, data); - - return IRQ_HANDLED; -} - -/** - * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine - * @napi: napi struct with our devices info in it - * @budget: amount of work driver is allowed to do this pass, in packets - * - **/ -static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget) -{ - struct ixgbe_q_vector *q_vector = - container_of(napi, struct ixgbe_q_vector, napi); - struct ixgbe_adapter *adapter = q_vector->adapter; - struct ixgbe_ring *rxr; - int work_done = 0; - long r_idx; - - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - rxr = &(adapter->rx_ring[r_idx]); -#ifdef CONFIG_DCA - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) - ixgbe_update_rx_dca(adapter, rxr); -#endif - - ixgbe_clean_rx_irq(adapter, rxr, &work_done, budget); - - /* If all Rx work done, exit the polling mode */ - if (work_done < budget) { - netif_rx_complete(adapter->netdev, napi); - if (adapter->rx_eitr < IXGBE_MIN_ITR_USECS) - ixgbe_set_itr_msix(q_vector); - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, rxr->v_idx); - } - - return work_done; -} - -static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx, - int r_idx) -{ - a->q_vector[v_idx].adapter = a; - set_bit(r_idx, a->q_vector[v_idx].rxr_idx); - a->q_vector[v_idx].rxr_count++; - a->rx_ring[r_idx].v_idx = 1 << v_idx; -} - -static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx, - int r_idx) -{ - a->q_vector[v_idx].adapter = a; - set_bit(r_idx, a->q_vector[v_idx].txr_idx); - a->q_vector[v_idx].txr_count++; - a->tx_ring[r_idx].v_idx = 1 << v_idx; -} - -/** - * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors - * @adapter: board private structure to initialize - * @vectors: allotted vector count for descriptor rings - * - * This function maps descriptor rings to the queue-specific vectors - * we were allotted through the MSI-X enabling code. Ideally, we'd have - * one vector per ring/queue, but on a constrained vector budget, we - * group the rings as "efficiently" as possible. You would add new - * mapping configurations in here. - **/ -static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter, - int vectors) -{ - int v_start = 0; - int rxr_idx = 0, txr_idx = 0; - int rxr_remaining = adapter->num_rx_queues; - int txr_remaining = adapter->num_tx_queues; - int i, j; - int rqpv, tqpv; - int err = 0; - - /* No mapping required if MSI-X is disabled. */ - if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) - goto out; - - /* - * The ideal configuration... - * We have enough vectors to map one per queue. - */ - if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) { - for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++) - map_vector_to_rxq(adapter, v_start, rxr_idx); - - for (; txr_idx < txr_remaining; v_start++, txr_idx++) - map_vector_to_txq(adapter, v_start, txr_idx); - - goto out; - } - - /* - * If we don't have enough vectors for a 1-to-1 - * mapping, we'll have to group them so there are - * multiple queues per vector. - */ - /* Re-adjusting *qpv takes care of the remainder. */ - for (i = v_start; i < vectors; i++) { - rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i); - for (j = 0; j < rqpv; j++) { - map_vector_to_rxq(adapter, i, rxr_idx); - rxr_idx++; - rxr_remaining--; - } - } - for (i = v_start; i < vectors; i++) { - tqpv = DIV_ROUND_UP(txr_remaining, vectors - i); - for (j = 0; j < tqpv; j++) { - map_vector_to_txq(adapter, i, txr_idx); - txr_idx++; - txr_remaining--; - } - } - -out: - return err; -} - -/** - * ixgbe_request_msix_irqs - Initialize MSI-X interrupts - * @adapter: board private structure - * - * ixgbe_request_msix_irqs allocates MSI-X vectors and requests - * interrupts from the kernel. - **/ -static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - irqreturn_t (*handler)(int, void *); - int i, vector, q_vectors, err; - - /* Decrement for Other and TCP Timer vectors */ - q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* Map the Tx/Rx rings to the vectors we were allotted. */ - err = ixgbe_map_rings_to_vectors(adapter, q_vectors); - if (err) - goto out; - -#define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \ - (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \ - &ixgbe_msix_clean_many) - for (vector = 0; vector < q_vectors; vector++) { - handler = SET_HANDLER(&adapter->q_vector[vector]); - sprintf(adapter->name[vector], "%s:v%d-%s", - netdev->name, vector, - (handler == &ixgbe_msix_clean_rx) ? "Rx" : - ((handler == &ixgbe_msix_clean_tx) ? "Tx" : "TxRx")); - err = request_irq(adapter->msix_entries[vector].vector, - handler, 0, adapter->name[vector], - &(adapter->q_vector[vector])); - if (err) { - DPRINTK(PROBE, ERR, - "request_irq failed for MSIX interrupt " - "Error: %d\n", err); - goto free_queue_irqs; - } - } - - sprintf(adapter->name[vector], "%s:lsc", netdev->name); - err = request_irq(adapter->msix_entries[vector].vector, - &ixgbe_msix_lsc, 0, adapter->name[vector], netdev); - if (err) { - DPRINTK(PROBE, ERR, - "request_irq for msix_lsc failed: %d\n", err); - goto free_queue_irqs; - } - - return 0; - -free_queue_irqs: - for (i = vector - 1; i >= 0; i--) - free_irq(adapter->msix_entries[--vector].vector, - &(adapter->q_vector[i])); - adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; - pci_disable_msix(adapter->pdev); - kfree(adapter->msix_entries); - adapter->msix_entries = NULL; -out: - return err; -} - -static void ixgbe_set_itr(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct ixgbe_q_vector *q_vector = adapter->q_vector; - u8 current_itr; - u32 new_itr = q_vector->eitr; - struct ixgbe_ring *rx_ring = &adapter->rx_ring[0]; - struct ixgbe_ring *tx_ring = &adapter->tx_ring[0]; - - q_vector->tx_eitr = ixgbe_update_itr(adapter, new_itr, - q_vector->tx_eitr, - tx_ring->total_packets, - tx_ring->total_bytes); - q_vector->rx_eitr = ixgbe_update_itr(adapter, new_itr, - q_vector->rx_eitr, - rx_ring->total_packets, - rx_ring->total_bytes); - - current_itr = max(q_vector->rx_eitr, q_vector->tx_eitr); - - switch (current_itr) { - /* counts and packets in update_itr are dependent on these numbers */ - case lowest_latency: - new_itr = 100000; - break; - case low_latency: - new_itr = 20000; /* aka hwitr = ~200 */ - break; - case bulk_latency: - new_itr = 8000; - break; - default: - break; - } - - if (new_itr != q_vector->eitr) { - u32 itr_reg; - /* do an exponential smoothing */ - new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100); - q_vector->eitr = new_itr; - itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr); - /* must write high and low 16 bits to reset counter */ - IXGBE_WRITE_REG(hw, IXGBE_EITR(0), itr_reg | (itr_reg)<<16); - } - - return; -} - -static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter); - -/** - * ixgbe_intr - legacy mode Interrupt Handler - * @irq: interrupt number - * @data: pointer to a network interface device structure - * @pt_regs: CPU registers structure - **/ -static irqreturn_t ixgbe_intr(int irq, void *data) -{ - struct net_device *netdev = data; - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - u32 eicr; - - - /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read - * therefore no explict interrupt disable is necessary */ - eicr = IXGBE_READ_REG(hw, IXGBE_EICR); - if (!eicr) - return IRQ_NONE; /* Not our interrupt */ - - if (eicr & IXGBE_EICR_LSC) { - adapter->lsc_int++; - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - mod_timer(&adapter->watchdog_timer, jiffies); - } - - - if (netif_rx_schedule_prep(netdev, &adapter->q_vector[0].napi)) { - adapter->tx_ring[0].total_packets = 0; - adapter->tx_ring[0].total_bytes = 0; - adapter->rx_ring[0].total_packets = 0; - adapter->rx_ring[0].total_bytes = 0; - /* would disable interrupts here but EIAM disabled it */ - __netif_rx_schedule(netdev, &adapter->q_vector[0].napi); - } - - return IRQ_HANDLED; -} - -static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter) -{ - int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - for (i = 0; i < q_vectors; i++) { - struct ixgbe_q_vector *q_vector = &adapter->q_vector[i]; - bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES); - bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES); - q_vector->rxr_count = 0; - q_vector->txr_count = 0; - } -} - -/** - * ixgbe_request_irq - initialize interrupts - * @adapter: board private structure - * - * Attempts to configure interrupts using the best available - * capabilities of the hardware and kernel. - **/ -static int ixgbe_request_irq(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - int err; - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - err = ixgbe_request_msix_irqs(adapter); - } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) { - err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0, - netdev->name, netdev); - } else { - err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED, - netdev->name, netdev); - } - - if (err) - DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err); - - return err; -} - -static void ixgbe_free_irq(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - int i, q_vectors; - - q_vectors = adapter->num_msix_vectors; - - i = q_vectors - 1; - free_irq(adapter->msix_entries[i].vector, netdev); - - i--; - for (; i >= 0; i--) { - free_irq(adapter->msix_entries[i].vector, - &(adapter->q_vector[i])); - } - - ixgbe_reset_q_vectors(adapter); - } else { - free_irq(adapter->pdev->irq, netdev); - } -} - -/** - * ixgbe_irq_disable - Mask off interrupt generation on the NIC - * @adapter: board private structure - **/ -static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter) -{ - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0); - IXGBE_WRITE_FLUSH(&adapter->hw); - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - int i; - for (i = 0; i < adapter->num_msix_vectors; i++) - synchronize_irq(adapter->msix_entries[i].vector); - } else { - synchronize_irq(adapter->pdev->irq); - } -} - -/** - * ixgbe_irq_enable - Enable default interrupt generation settings - * @adapter: board private structure - **/ -static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter) -{ - u32 mask; - mask = IXGBE_EIMS_ENABLE_MASK; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask); - IXGBE_WRITE_FLUSH(&adapter->hw); -} - -/** - * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts - * - **/ -static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - - IXGBE_WRITE_REG(hw, IXGBE_EITR(0), - EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr)); - - ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0); - ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(0), 0); - - map_vector_to_rxq(adapter, 0, 0); - map_vector_to_txq(adapter, 0, 0); - - DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n"); -} - -/** - * ixgbe_configure_tx - Configure 8254x Transmit Unit after Reset - * @adapter: board private structure - * - * Configure the Tx unit of the MAC after a reset. - **/ -static void ixgbe_configure_tx(struct ixgbe_adapter *adapter) -{ - u64 tdba; - struct ixgbe_hw *hw = &adapter->hw; - u32 i, j, tdlen, txctrl; - - /* Setup the HW Tx Head and Tail descriptor pointers */ - for (i = 0; i < adapter->num_tx_queues; i++) { - j = adapter->tx_ring[i].reg_idx; - tdba = adapter->tx_ring[i].dma; - tdlen = adapter->tx_ring[i].count * - sizeof(union ixgbe_adv_tx_desc); - IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j), - (tdba & DMA_32BIT_MASK)); - IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32)); - IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen); - IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0); - IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0); - adapter->tx_ring[i].head = IXGBE_TDH(j); - adapter->tx_ring[i].tail = IXGBE_TDT(j); - /* Disable Tx Head Writeback RO bit, since this hoses - * bookkeeping if things aren't delivered in order. - */ - txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(i)); - txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN; - IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(i), txctrl); - } -} - -#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \ - (((S) & (PAGE_SIZE - 1)) ? 1 : 0)) - -#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 -/** - * ixgbe_get_skb_hdr - helper function for LRO header processing - * @skb: pointer to sk_buff to be added to LRO packet - * @iphdr: pointer to tcp header structure - * @tcph: pointer to tcp header structure - * @hdr_flags: pointer to header flags - * @priv: private data - **/ -static int ixgbe_get_skb_hdr(struct sk_buff *skb, void **iphdr, void **tcph, - u64 *hdr_flags, void *priv) -{ - union ixgbe_adv_rx_desc *rx_desc = priv; - - /* Verify that this is a valid IPv4 TCP packet */ - if (!(rx_desc->wb.lower.lo_dword.pkt_info & - (IXGBE_RXDADV_PKTTYPE_IPV4 | IXGBE_RXDADV_PKTTYPE_TCP))) - return -1; - - /* Set network headers */ - skb_reset_network_header(skb); - skb_set_transport_header(skb, ip_hdrlen(skb)); - *iphdr = ip_hdr(skb); - *tcph = tcp_hdr(skb); - *hdr_flags = LRO_IPV4 | LRO_TCP; - return 0; -} - -/** - * ixgbe_configure_rx - Configure 8254x Receive Unit after Reset - * @adapter: board private structure - * - * Configure the Rx unit of the MAC after a reset. - **/ -static void ixgbe_configure_rx(struct ixgbe_adapter *adapter) -{ - u64 rdba; - struct ixgbe_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; - int i, j; - u32 rdlen, rxctrl, rxcsum; - u32 random[10]; - u32 fctrl, hlreg0; - u32 pages; - u32 reta = 0, mrqc, srrctl; - - /* Decide whether to use packet split mode or not */ - if (netdev->mtu > ETH_DATA_LEN) - adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED; - else - adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED; - - /* Set the RX buffer length according to the mode */ - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - adapter->rx_buf_len = IXGBE_RX_HDR_SIZE; - } else { - if (netdev->mtu <= ETH_DATA_LEN) - adapter->rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE; - else - adapter->rx_buf_len = ALIGN(max_frame, 1024); - } - - fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL); - fctrl |= IXGBE_FCTRL_BAM; - fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */ - IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl); - - hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0); - if (adapter->netdev->mtu <= ETH_DATA_LEN) - hlreg0 &= ~IXGBE_HLREG0_JUMBOEN; - else - hlreg0 |= IXGBE_HLREG0_JUMBOEN; - IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0); - - pages = PAGE_USE_COUNT(adapter->netdev->mtu); - - srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(0)); - srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK; - srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK; - - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; - srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; - srrctl |= ((IXGBE_RX_HDR_SIZE << - IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) & - IXGBE_SRRCTL_BSIZEHDR_MASK); - } else { - srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; - - if (adapter->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE) - srrctl |= - IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; - else - srrctl |= - adapter->rx_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; - } - IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(0), srrctl); - - rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc); - /* disable receives while setting up the descriptors */ - rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); - IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN); - - /* Setup the HW Rx Head and Tail Descriptor Pointers and - * the Base and Length of the Rx Descriptor Ring */ - for (i = 0; i < adapter->num_rx_queues; i++) { - rdba = adapter->rx_ring[i].dma; - IXGBE_WRITE_REG(hw, IXGBE_RDBAL(i), (rdba & DMA_32BIT_MASK)); - IXGBE_WRITE_REG(hw, IXGBE_RDBAH(i), (rdba >> 32)); - IXGBE_WRITE_REG(hw, IXGBE_RDLEN(i), rdlen); - IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0); - IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0); - adapter->rx_ring[i].head = IXGBE_RDH(i); - adapter->rx_ring[i].tail = IXGBE_RDT(i); - } - - /* Intitial LRO Settings */ - adapter->rx_ring[i].lro_mgr.max_aggr = IXGBE_MAX_LRO_AGGREGATE; - adapter->rx_ring[i].lro_mgr.max_desc = IXGBE_MAX_LRO_DESCRIPTORS; - adapter->rx_ring[i].lro_mgr.get_skb_header = ixgbe_get_skb_hdr; - adapter->rx_ring[i].lro_mgr.features = LRO_F_EXTRACT_VLAN_ID; - if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) - adapter->rx_ring[i].lro_mgr.features |= LRO_F_NAPI; - adapter->rx_ring[i].lro_mgr.dev = adapter->netdev; - adapter->rx_ring[i].lro_mgr.ip_summed = CHECKSUM_UNNECESSARY; - adapter->rx_ring[i].lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; - - if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) { - /* Fill out redirection table */ - for (i = 0, j = 0; i < 128; i++, j++) { - if (j == adapter->ring_feature[RING_F_RSS].indices) - j = 0; - /* reta = 4-byte sliding window of - * 0x00..(indices-1)(indices-1)00..etc. */ - reta = (reta << 8) | (j * 0x11); - if ((i & 3) == 3) - IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta); - } - - /* Fill out hash function seeds */ - /* XXX use a random constant here to glue certain flows */ - get_random_bytes(&random[0], 40); - for (i = 0; i < 10; i++) - IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), random[i]); - - mrqc = IXGBE_MRQC_RSSEN - /* Perform hash on these packet types */ - | IXGBE_MRQC_RSS_FIELD_IPV4 - | IXGBE_MRQC_RSS_FIELD_IPV4_TCP - | IXGBE_MRQC_RSS_FIELD_IPV4_UDP - | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP - | IXGBE_MRQC_RSS_FIELD_IPV6_EX - | IXGBE_MRQC_RSS_FIELD_IPV6 - | IXGBE_MRQC_RSS_FIELD_IPV6_TCP - | IXGBE_MRQC_RSS_FIELD_IPV6_UDP - | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP; - IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc); - } - - rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM); - - if (adapter->flags & IXGBE_FLAG_RSS_ENABLED || - adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) { - /* Disable indicating checksum in descriptor, enables - * RSS hash */ - rxcsum |= IXGBE_RXCSUM_PCSD; - } - if (!(rxcsum & IXGBE_RXCSUM_PCSD)) { - /* Enable IPv4 payload checksum for UDP fragments - * if PCSD is not set */ - rxcsum |= IXGBE_RXCSUM_IPPCSE; - } - - IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum); -} - -static void ixgbe_vlan_rx_register(struct net_device *netdev, - struct vlan_group *grp) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - u32 ctrl; - - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_disable(adapter); - adapter->vlgrp = grp; - - if (grp) { - /* enable VLAN tag insert/strip */ - ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL); - ctrl |= IXGBE_VLNCTRL_VME; - ctrl &= ~IXGBE_VLNCTRL_CFIEN; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl); - } - - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_enable(adapter); -} - -static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - /* add VID to filter table */ - ixgbe_set_vfta(&adapter->hw, vid, 0, true); -} - -static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_disable(adapter); - - vlan_group_set_device(adapter->vlgrp, vid, NULL); - - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_enable(adapter); - - /* remove VID from filter table */ - ixgbe_set_vfta(&adapter->hw, vid, 0, false); -} - -static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter) -{ - ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp); - - if (adapter->vlgrp) { - u16 vid; - for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { - if (!vlan_group_get_device(adapter->vlgrp, vid)) - continue; - ixgbe_vlan_rx_add_vid(adapter->netdev, vid); - } - } -} - -/** - * ixgbe_set_multi - Multicast and Promiscuous mode set - * @netdev: network interface device structure - * - * The set_multi entry point is called whenever the multicast address - * list or the network interface flags are updated. This routine is - * responsible for configuring the hardware for proper multicast, - * promiscuous mode, and all-multi behavior. - **/ -static void ixgbe_set_multi(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - struct dev_mc_list *mc_ptr; - u8 *mta_list; - u32 fctrl, vlnctrl; - int i; - - /* Check for Promiscuous and All Multicast modes */ - - fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL); - vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); - - if (netdev->flags & IFF_PROMISC) { - fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE); - vlnctrl &= ~IXGBE_VLNCTRL_VFE; - } else { - if (netdev->flags & IFF_ALLMULTI) { - fctrl |= IXGBE_FCTRL_MPE; - fctrl &= ~IXGBE_FCTRL_UPE; - } else { - fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE); - } - vlnctrl |= IXGBE_VLNCTRL_VFE; - } - - IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl); - IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); - - if (netdev->mc_count) { - mta_list = kcalloc(netdev->mc_count, ETH_ALEN, GFP_ATOMIC); - if (!mta_list) - return; - - /* Shared function expects packed array of only addresses. */ - mc_ptr = netdev->mc_list; - - for (i = 0; i < netdev->mc_count; i++) { - if (!mc_ptr) - break; - memcpy(mta_list + (i * ETH_ALEN), mc_ptr->dmi_addr, - ETH_ALEN); - mc_ptr = mc_ptr->next; - } - - ixgbe_update_mc_addr_list(hw, mta_list, i, 0); - kfree(mta_list); - } else { - ixgbe_update_mc_addr_list(hw, NULL, 0, 0); - } - -} - -static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter) -{ - int q_idx; - struct ixgbe_q_vector *q_vector; - int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* legacy and MSI only use one vector */ - if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) - q_vectors = 1; - - for (q_idx = 0; q_idx < q_vectors; q_idx++) { - q_vector = &adapter->q_vector[q_idx]; - if (!q_vector->rxr_count) - continue; - napi_enable(&q_vector->napi); - } -} - -static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter) -{ - int q_idx; - struct ixgbe_q_vector *q_vector; - int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* legacy and MSI only use one vector */ - if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) - q_vectors = 1; - - for (q_idx = 0; q_idx < q_vectors; q_idx++) { - q_vector = &adapter->q_vector[q_idx]; - if (!q_vector->rxr_count) - continue; - napi_disable(&q_vector->napi); - } -} - -static void ixgbe_configure(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - int i; - - ixgbe_set_multi(netdev); - - ixgbe_restore_vlan(adapter); - - ixgbe_configure_tx(adapter); - ixgbe_configure_rx(adapter); - for (i = 0; i < adapter->num_rx_queues; i++) - ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i], - (adapter->rx_ring[i].count - 1)); -} - -static int ixgbe_up_complete(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - int i, j = 0; - int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; - u32 txdctl, rxdctl, mhadd; - u32 gpie; - - ixgbe_get_hw_control(adapter); - - if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) || - (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) { - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME | - IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD); - } else { - /* MSI only */ - gpie = 0; - } - /* XXX: to interrupt immediately for EICS writes, enable this */ - /* gpie |= IXGBE_GPIE_EIMEN; */ - IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie); - } - - if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) { - /* legacy interrupts, use EIAM to auto-mask when reading EICR, - * specifically only auto mask tx and rx interrupts */ - IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE); - } - - mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD); - if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) { - mhadd &= ~IXGBE_MHADD_MFS_MASK; - mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT; - - IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd); - } - - for (i = 0; i < adapter->num_tx_queues; i++) { - j = adapter->tx_ring[i].reg_idx; - txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j)); - txdctl |= IXGBE_TXDCTL_ENABLE; - IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl); - } - - for (i = 0; i < adapter->num_rx_queues; i++) { - j = adapter->rx_ring[i].reg_idx; - rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j)); - /* enable PTHRESH=32 descriptors (half the internal cache) - * and HTHRESH=0 descriptors (to minimize latency on fetch), - * this also removes a pesky rx_no_buffer_count increment */ - rxdctl |= 0x0020; - rxdctl |= IXGBE_RXDCTL_ENABLE; - IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl); - } - /* enable all receives */ - rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); - rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN); - IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl); - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) - ixgbe_configure_msix(adapter); - else - ixgbe_configure_msi_and_legacy(adapter); - - clear_bit(__IXGBE_DOWN, &adapter->state); - ixgbe_napi_enable_all(adapter); - - /* clear any pending interrupts, may auto mask */ - IXGBE_READ_REG(hw, IXGBE_EICR); - - ixgbe_irq_enable(adapter); - - /* bring the link up in the watchdog, this could race with our first - * link up interrupt but shouldn't be a problem */ - mod_timer(&adapter->watchdog_timer, jiffies); - return 0; -} - -void ixgbe_reinit_locked(struct ixgbe_adapter *adapter) -{ - WARN_ON(in_interrupt()); - while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state)) - msleep(1); - ixgbe_down(adapter); - ixgbe_up(adapter); - clear_bit(__IXGBE_RESETTING, &adapter->state); -} - -int ixgbe_up(struct ixgbe_adapter *adapter) -{ - /* hardware has been reset, we need to reload some things */ - ixgbe_configure(adapter); - - return ixgbe_up_complete(adapter); -} - -void ixgbe_reset(struct ixgbe_adapter *adapter) -{ - if (ixgbe_init_hw(&adapter->hw)) - DPRINTK(PROBE, ERR, "Hardware Error\n"); - - /* reprogram the RAR[0] in case user changed it. */ - ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV); - -} - -#ifdef CONFIG_PM -static int ixgbe_resume(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgbe_adapter *adapter = netdev_priv(netdev); - u32 err; - - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - err = pci_enable_device(pdev); - if (err) { - printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \ - "suspend\n"); - return err; - } - pci_set_master(pdev); - - pci_enable_wake(pdev, PCI_D3hot, 0); - pci_enable_wake(pdev, PCI_D3cold, 0); - - if (netif_running(netdev)) { - err = ixgbe_request_irq(adapter); - if (err) - return err; - } - - ixgbe_reset(adapter); - - if (netif_running(netdev)) - ixgbe_up(adapter); - - netif_device_attach(netdev); - - return 0; -} -#endif - -/** - * ixgbe_clean_rx_ring - Free Rx Buffers per Queue - * @adapter: board private structure - * @rx_ring: ring to free buffers from - **/ -static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - unsigned long size; - unsigned int i; - - /* Free all the Rx ring sk_buffs */ - - for (i = 0; i < rx_ring->count; i++) { - struct ixgbe_rx_buffer *rx_buffer_info; - - rx_buffer_info = &rx_ring->rx_buffer_info[i]; - if (rx_buffer_info->dma) { - pci_unmap_single(pdev, rx_buffer_info->dma, - adapter->rx_buf_len, - PCI_DMA_FROMDEVICE); - rx_buffer_info->dma = 0; - } - if (rx_buffer_info->skb) { - dev_kfree_skb(rx_buffer_info->skb); - rx_buffer_info->skb = NULL; - } - if (!rx_buffer_info->page) - continue; - pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE, - PCI_DMA_FROMDEVICE); - rx_buffer_info->page_dma = 0; - - put_page(rx_buffer_info->page); - rx_buffer_info->page = NULL; - } - - size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count; - memset(rx_ring->rx_buffer_info, 0, size); - - /* Zero out the descriptor ring */ - memset(rx_ring->desc, 0, rx_ring->size); - - rx_ring->next_to_clean = 0; - rx_ring->next_to_use = 0; - - writel(0, adapter->hw.hw_addr + rx_ring->head); - writel(0, adapter->hw.hw_addr + rx_ring->tail); -} - -/** - * ixgbe_clean_tx_ring - Free Tx Buffers - * @adapter: board private structure - * @tx_ring: ring to be cleaned - **/ -static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring) -{ - struct ixgbe_tx_buffer *tx_buffer_info; - unsigned long size; - unsigned int i; - - /* Free all the Tx ring sk_buffs */ - - for (i = 0; i < tx_ring->count; i++) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info); - } - - size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count; - memset(tx_ring->tx_buffer_info, 0, size); - - /* Zero out the descriptor ring */ - memset(tx_ring->desc, 0, tx_ring->size); - - tx_ring->next_to_use = 0; - tx_ring->next_to_clean = 0; - - writel(0, adapter->hw.hw_addr + tx_ring->head); - writel(0, adapter->hw.hw_addr + tx_ring->tail); -} - -/** - * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues - * @adapter: board private structure - **/ -static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_rx_queues; i++) - ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]); -} - -/** - * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues - * @adapter: board private structure - **/ -static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) - ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]); -} - -void ixgbe_down(struct ixgbe_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - u32 rxctrl; - - /* signal that we are down to the interrupt handler */ - set_bit(__IXGBE_DOWN, &adapter->state); - - /* disable receives */ - rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL, - rxctrl & ~IXGBE_RXCTRL_RXEN); - - netif_tx_disable(netdev); - - /* disable transmits in the hardware */ - - /* flush both disables */ - IXGBE_WRITE_FLUSH(&adapter->hw); - msleep(10); - - ixgbe_irq_disable(adapter); - - ixgbe_napi_disable_all(adapter); - del_timer_sync(&adapter->watchdog_timer); - - netif_carrier_off(netdev); - netif_tx_stop_all_queues(netdev); - - if (!pci_channel_offline(adapter->pdev)) - ixgbe_reset(adapter); - ixgbe_clean_all_tx_rings(adapter); - ixgbe_clean_all_rx_rings(adapter); - -} - -static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgbe_adapter *adapter = netdev_priv(netdev); -#ifdef CONFIG_PM - int retval = 0; -#endif - - netif_device_detach(netdev); - - if (netif_running(netdev)) { - ixgbe_down(adapter); - ixgbe_free_irq(adapter); - } - -#ifdef CONFIG_PM - retval = pci_save_state(pdev); - if (retval) - return retval; -#endif - - pci_enable_wake(pdev, PCI_D3hot, 0); - pci_enable_wake(pdev, PCI_D3cold, 0); - - ixgbe_release_hw_control(adapter); - - pci_disable_device(pdev); - - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - - return 0; -} - -static void ixgbe_shutdown(struct pci_dev *pdev) -{ - ixgbe_suspend(pdev, PMSG_SUSPEND); -} - -/** - * ixgbe_poll - NAPI Rx polling callback - * @napi: structure for representing this polling device - * @budget: how many packets driver is allowed to clean - * - * This function is used for legacy and MSI, NAPI mode - **/ -static int ixgbe_poll(struct napi_struct *napi, int budget) -{ - struct ixgbe_q_vector *q_vector = container_of(napi, - struct ixgbe_q_vector, napi); - struct ixgbe_adapter *adapter = q_vector->adapter; - int tx_cleaned = 0, work_done = 0; - -#ifdef CONFIG_DCA - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { - ixgbe_update_tx_dca(adapter, adapter->tx_ring); - ixgbe_update_rx_dca(adapter, adapter->rx_ring); - } -#endif - - tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring); - ixgbe_clean_rx_irq(adapter, adapter->rx_ring, &work_done, budget); - - if (tx_cleaned) - work_done = budget; - - /* If budget not fully consumed, exit the polling mode */ - if (work_done < budget) { - netif_rx_complete(adapter->netdev, napi); - if (adapter->rx_eitr < IXGBE_MIN_ITR_USECS) - ixgbe_set_itr(adapter); - if (!test_bit(__IXGBE_DOWN, &adapter->state)) - ixgbe_irq_enable(adapter); - } - - return work_done; -} - -/** - * ixgbe_tx_timeout - Respond to a Tx Hang - * @netdev: network interface device structure - **/ -static void ixgbe_tx_timeout(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - /* Do the reset outside of interrupt context */ - schedule_work(&adapter->reset_task); -} - -static void ixgbe_reset_task(struct work_struct *work) -{ - struct ixgbe_adapter *adapter; - adapter = container_of(work, struct ixgbe_adapter, reset_task); - - adapter->tx_timeout_count++; - - ixgbe_reinit_locked(adapter); -} - -static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter, - int vectors) -{ - int err, vector_threshold; - - /* We'll want at least 3 (vector_threshold): - * 1) TxQ[0] Cleanup - * 2) RxQ[0] Cleanup - * 3) Other (Link Status Change, etc.) - * 4) TCP Timer (optional) - */ - vector_threshold = MIN_MSIX_COUNT; - - /* The more we get, the more we will assign to Tx/Rx Cleanup - * for the separate queues...where Rx Cleanup >= Tx Cleanup. - * Right now, we simply care about how many we'll get; we'll - * set them up later while requesting irq's. - */ - while (vectors >= vector_threshold) { - err = pci_enable_msix(adapter->pdev, adapter->msix_entries, - vectors); - if (!err) /* Success in acquiring all requested vectors. */ - break; - else if (err < 0) - vectors = 0; /* Nasty failure, quit now */ - else /* err == number of vectors we should try again with */ - vectors = err; - } - - if (vectors < vector_threshold) { - /* Can't allocate enough MSI-X interrupts? Oh well. - * This just means we'll go with either a single MSI - * vector or fall back to legacy interrupts. - */ - DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n"); - adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; - kfree(adapter->msix_entries); - adapter->msix_entries = NULL; - adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED; - adapter->num_tx_queues = 1; - adapter->num_rx_queues = 1; - } else { - adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */ - adapter->num_msix_vectors = vectors; - } -} - -static void __devinit ixgbe_set_num_queues(struct ixgbe_adapter *adapter) -{ - int nrq, ntq; - int feature_mask = 0, rss_i, rss_m; - - /* Number of supported queues */ - switch (adapter->hw.mac.type) { - case ixgbe_mac_82598EB: - rss_i = adapter->ring_feature[RING_F_RSS].indices; - rss_m = 0; - feature_mask |= IXGBE_FLAG_RSS_ENABLED; - - switch (adapter->flags & feature_mask) { - case (IXGBE_FLAG_RSS_ENABLED): - rss_m = 0xF; - nrq = rss_i; - ntq = rss_i; - break; - case 0: - default: - rss_i = 0; - rss_m = 0; - nrq = 1; - ntq = 1; - break; - } - - adapter->ring_feature[RING_F_RSS].indices = rss_i; - adapter->ring_feature[RING_F_RSS].mask = rss_m; - break; - default: - nrq = 1; - ntq = 1; - break; - } - - adapter->num_rx_queues = nrq; - adapter->num_tx_queues = ntq; -} - -/** - * ixgbe_cache_ring_register - Descriptor ring to register mapping - * @adapter: board private structure to initialize - * - * Once we know the feature-set enabled for the device, we'll cache - * the register offset the descriptor ring is assigned to. - **/ -static void __devinit ixgbe_cache_ring_register(struct ixgbe_adapter *adapter) -{ - /* TODO: Remove all uses of the indices in the cases where multiple - * features are OR'd together, if the feature set makes sense. - */ - int feature_mask = 0, rss_i; - int i, txr_idx, rxr_idx; - - /* Number of supported queues */ - switch (adapter->hw.mac.type) { - case ixgbe_mac_82598EB: - rss_i = adapter->ring_feature[RING_F_RSS].indices; - txr_idx = 0; - rxr_idx = 0; - feature_mask |= IXGBE_FLAG_RSS_ENABLED; - switch (adapter->flags & feature_mask) { - case (IXGBE_FLAG_RSS_ENABLED): - for (i = 0; i < adapter->num_rx_queues; i++) - adapter->rx_ring[i].reg_idx = i; - for (i = 0; i < adapter->num_tx_queues; i++) - adapter->tx_ring[i].reg_idx = i; - break; - case 0: - default: - break; - } - break; - default: - break; - } -} - -/** - * ixgbe_alloc_queues - Allocate memory for all rings - * @adapter: board private structure to initialize - * - * We allocate one ring per queue at run-time since we don't know the - * number of queues at compile-time. The polling_netdev array is - * intended for Multiqueue, but should work fine with a single queue. - **/ -static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter) -{ - int i; - - adapter->tx_ring = kcalloc(adapter->num_tx_queues, - sizeof(struct ixgbe_ring), GFP_KERNEL); - if (!adapter->tx_ring) - goto err_tx_ring_allocation; - - adapter->rx_ring = kcalloc(adapter->num_rx_queues, - sizeof(struct ixgbe_ring), GFP_KERNEL); - if (!adapter->rx_ring) - goto err_rx_ring_allocation; - - for (i = 0; i < adapter->num_tx_queues; i++) { - adapter->tx_ring[i].count = IXGBE_DEFAULT_TXD; - adapter->tx_ring[i].queue_index = i; - } - for (i = 0; i < adapter->num_rx_queues; i++) { - adapter->rx_ring[i].count = IXGBE_DEFAULT_RXD; - adapter->rx_ring[i].queue_index = i; - } - - ixgbe_cache_ring_register(adapter); - - return 0; - -err_rx_ring_allocation: - kfree(adapter->tx_ring); -err_tx_ring_allocation: - return -ENOMEM; -} - -/** - * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported - * @adapter: board private structure to initialize - * - * Attempt to configure the interrupts using the best available - * capabilities of the hardware and the kernel. - **/ -static int __devinit ixgbe_set_interrupt_capability(struct ixgbe_adapter - *adapter) -{ - int err = 0; - int vector, v_budget; - - /* - * Set the default interrupt throttle rate. - */ - adapter->rx_eitr = (1000000 / IXGBE_DEFAULT_ITR_RX_USECS); - adapter->tx_eitr = (1000000 / IXGBE_DEFAULT_ITR_TX_USECS); - - /* - * It's easy to be greedy for MSI-X vectors, but it really - * doesn't do us much good if we have a lot more vectors - * than CPU's. So let's be conservative and only ask for - * (roughly) twice the number of vectors as there are CPU's. - */ - v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues, - (int)(num_online_cpus() * 2)) + NON_Q_VECTORS; - - /* - * At the same time, hardware can only support a maximum of - * MAX_MSIX_COUNT vectors. With features such as RSS and VMDq, - * we can easily reach upwards of 64 Rx descriptor queues and - * 32 Tx queues. Thus, we cap it off in those rare cases where - * the cpu count also exceeds our vector limit. - */ - v_budget = min(v_budget, MAX_MSIX_COUNT); - - /* A failure in MSI-X entry allocation isn't fatal, but it does - * mean we disable MSI-X capabilities of the adapter. */ - adapter->msix_entries = kcalloc(v_budget, - sizeof(struct msix_entry), GFP_KERNEL); - if (!adapter->msix_entries) { - adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED; - ixgbe_set_num_queues(adapter); - kfree(adapter->tx_ring); - kfree(adapter->rx_ring); - err = ixgbe_alloc_queues(adapter); - if (err) { - DPRINTK(PROBE, ERR, "Unable to allocate memory " - "for queues\n"); - goto out; - } - - goto try_msi; - } - - for (vector = 0; vector < v_budget; vector++) - adapter->msix_entries[vector].entry = vector; - - ixgbe_acquire_msix_vectors(adapter, v_budget); - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) - goto out; - -try_msi: - err = pci_enable_msi(adapter->pdev); - if (!err) { - adapter->flags |= IXGBE_FLAG_MSI_ENABLED; - } else { - DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, " - "falling back to legacy. Error: %d\n", err); - /* reset err */ - err = 0; - } - -out: - /* Notify the stack of the (possibly) reduced Tx Queue count. */ - adapter->netdev->real_num_tx_queues = adapter->num_tx_queues; - - return err; -} - -static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter) -{ - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; - pci_disable_msix(adapter->pdev); - kfree(adapter->msix_entries); - adapter->msix_entries = NULL; - } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) { - adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED; - pci_disable_msi(adapter->pdev); - } - return; -} - -/** - * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme - * @adapter: board private structure to initialize - * - * We determine which interrupt scheme to use based on... - * - Kernel support (MSI, MSI-X) - * - which can be user-defined (via MODULE_PARAM) - * - Hardware queue count (num_*_queues) - * - defined by miscellaneous hardware support/features (RSS, etc.) - **/ -static int __devinit ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter) -{ - int err; - - /* Number of supported queues */ - ixgbe_set_num_queues(adapter); - - err = ixgbe_alloc_queues(adapter); - if (err) { - DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n"); - goto err_alloc_queues; - } - - err = ixgbe_set_interrupt_capability(adapter); - if (err) { - DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n"); - goto err_set_interrupt; - } - - DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, " - "Tx Queue count = %u\n", - (adapter->num_rx_queues > 1) ? "Enabled" : - "Disabled", adapter->num_rx_queues, adapter->num_tx_queues); - - set_bit(__IXGBE_DOWN, &adapter->state); - - return 0; - -err_set_interrupt: - kfree(adapter->tx_ring); - kfree(adapter->rx_ring); -err_alloc_queues: - return err; -} - -/** - * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter) - * @adapter: board private structure to initialize - * - * ixgbe_sw_init initializes the Adapter private data structure. - * Fields are initialized based on PCI device information and - * OS network device settings (MTU size). - **/ -static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct pci_dev *pdev = adapter->pdev; - unsigned int rss; - - /* Set capability flags */ - rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus()); - adapter->ring_feature[RING_F_RSS].indices = rss; - adapter->flags |= IXGBE_FLAG_RSS_ENABLED; - - /* Enable Dynamic interrupt throttling by default */ - adapter->rx_eitr = 1; - adapter->tx_eitr = 1; - - /* default flow control settings */ - hw->fc.original_type = ixgbe_fc_full; - hw->fc.type = ixgbe_fc_full; - - /* select 10G link by default */ - hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN; - if (hw->mac.ops.reset(hw)) { - dev_err(&pdev->dev, "HW Init failed\n"); - return -EIO; - } - if (hw->mac.ops.setup_link_speed(hw, IXGBE_LINK_SPEED_10GB_FULL, true, - false)) { - dev_err(&pdev->dev, "Link Speed setup failed\n"); - return -EIO; - } - - /* initialize eeprom parameters */ - if (ixgbe_init_eeprom(hw)) { - dev_err(&pdev->dev, "EEPROM initialization failed\n"); - return -EIO; - } - - /* enable rx csum by default */ - adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED; - - set_bit(__IXGBE_DOWN, &adapter->state); - - return 0; -} - -/** - * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors) - * @adapter: board private structure - * @txdr: tx descriptor ring (for a specific queue) to setup - * - * Return 0 on success, negative on failure - **/ -int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter, - struct ixgbe_ring *txdr) -{ - struct pci_dev *pdev = adapter->pdev; - int size; - - size = sizeof(struct ixgbe_tx_buffer) * txdr->count; - txdr->tx_buffer_info = vmalloc(size); - if (!txdr->tx_buffer_info) { - DPRINTK(PROBE, ERR, - "Unable to allocate memory for the transmit descriptor ring\n"); - return -ENOMEM; - } - memset(txdr->tx_buffer_info, 0, size); - - /* round up to nearest 4K */ - txdr->size = txdr->count * sizeof(union ixgbe_adv_tx_desc); - txdr->size = ALIGN(txdr->size, 4096); - - txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); - if (!txdr->desc) { - vfree(txdr->tx_buffer_info); - DPRINTK(PROBE, ERR, - "Memory allocation failed for the tx desc ring\n"); - return -ENOMEM; - } - - txdr->next_to_use = 0; - txdr->next_to_clean = 0; - txdr->work_limit = txdr->count; - - return 0; -} - -/** - * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors) - * @adapter: board private structure - * @rxdr: rx descriptor ring (for a specific queue) to setup - * - * Returns 0 on success, negative on failure - **/ -int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rxdr) -{ - struct pci_dev *pdev = adapter->pdev; - int size; - - size = sizeof(struct net_lro_desc) * IXGBE_MAX_LRO_DESCRIPTORS; - rxdr->lro_mgr.lro_arr = vmalloc(size); - if (!rxdr->lro_mgr.lro_arr) - return -ENOMEM; - memset(rxdr->lro_mgr.lro_arr, 0, size); - - size = sizeof(struct ixgbe_rx_buffer) * rxdr->count; - rxdr->rx_buffer_info = vmalloc(size); - if (!rxdr->rx_buffer_info) { - DPRINTK(PROBE, ERR, - "vmalloc allocation failed for the rx desc ring\n"); - goto alloc_failed; - } - memset(rxdr->rx_buffer_info, 0, size); - - /* Round up to nearest 4K */ - rxdr->size = rxdr->count * sizeof(union ixgbe_adv_rx_desc); - rxdr->size = ALIGN(rxdr->size, 4096); - - rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); - - if (!rxdr->desc) { - DPRINTK(PROBE, ERR, - "Memory allocation failed for the rx desc ring\n"); - vfree(rxdr->rx_buffer_info); - goto alloc_failed; - } - - rxdr->next_to_clean = 0; - rxdr->next_to_use = 0; - - return 0; - -alloc_failed: - vfree(rxdr->lro_mgr.lro_arr); - rxdr->lro_mgr.lro_arr = NULL; - return -ENOMEM; -} - -/** - * ixgbe_free_tx_resources - Free Tx Resources per Queue - * @adapter: board private structure - * @tx_ring: Tx descriptor ring for a specific queue - * - * Free all transmit software resources - **/ -static void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - - ixgbe_clean_tx_ring(adapter, tx_ring); - - vfree(tx_ring->tx_buffer_info); - tx_ring->tx_buffer_info = NULL; - - pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma); - - tx_ring->desc = NULL; -} - -/** - * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues - * @adapter: board private structure - * - * Free all transmit software resources - **/ -static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) - ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]); -} - -/** - * ixgbe_free_rx_resources - Free Rx Resources - * @adapter: board private structure - * @rx_ring: ring to clean the resources from - * - * Free all receive software resources - **/ -static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - - vfree(rx_ring->lro_mgr.lro_arr); - rx_ring->lro_mgr.lro_arr = NULL; - - ixgbe_clean_rx_ring(adapter, rx_ring); - - vfree(rx_ring->rx_buffer_info); - rx_ring->rx_buffer_info = NULL; - - pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma); - - rx_ring->desc = NULL; -} - -/** - * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues - * @adapter: board private structure - * - * Free all receive software resources - **/ -static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_rx_queues; i++) - ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]); -} - -/** - * ixgbe_setup_all_tx_resources - allocate all queues Tx resources - * @adapter: board private structure - * - * If this function returns with an error, then it's possible one or - * more of the rings is populated (while the rest are not). It is the - * callers duty to clean those orphaned rings. - * - * Return 0 on success, negative on failure - **/ -static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter) -{ - int i, err = 0; - - for (i = 0; i < adapter->num_tx_queues; i++) { - err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]); - if (err) { - DPRINTK(PROBE, ERR, - "Allocation for Tx Queue %u failed\n", i); - break; - } - } - - return err; -} - -/** - * ixgbe_setup_all_rx_resources - allocate all queues Rx resources - * @adapter: board private structure - * - * If this function returns with an error, then it's possible one or - * more of the rings is populated (while the rest are not). It is the - * callers duty to clean those orphaned rings. - * - * Return 0 on success, negative on failure - **/ - -static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter) -{ - int i, err = 0; - - for (i = 0; i < adapter->num_rx_queues; i++) { - err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]); - if (err) { - DPRINTK(PROBE, ERR, - "Allocation for Rx Queue %u failed\n", i); - break; - } - } - - return err; -} - -/** - * ixgbe_change_mtu - Change the Maximum Transfer Unit - * @netdev: network interface device structure - * @new_mtu: new value for maximum frame size - * - * Returns 0 on success, negative on failure - **/ -static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; - - if ((max_frame < (ETH_ZLEN + ETH_FCS_LEN)) || - (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE)) - return -EINVAL; - - DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n", - netdev->mtu, new_mtu); - /* must set new MTU before calling down or up */ - netdev->mtu = new_mtu; - - if (netif_running(netdev)) - ixgbe_reinit_locked(adapter); - - return 0; -} - -/** - * ixgbe_open - Called when a network interface is made active - * @netdev: network interface device structure - * - * Returns 0 on success, negative value on failure - * - * The open entry point is called when a network interface is made - * active by the system (IFF_UP). At this point all resources needed - * for transmit and receive operations are allocated, the interrupt - * handler is registered with the OS, the watchdog timer is started, - * and the stack is notified that the interface is ready. - **/ -static int ixgbe_open(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - int err; - - /* disallow open during test */ - if (test_bit(__IXGBE_TESTING, &adapter->state)) - return -EBUSY; - - /* allocate transmit descriptors */ - err = ixgbe_setup_all_tx_resources(adapter); - if (err) - goto err_setup_tx; - - /* allocate receive descriptors */ - err = ixgbe_setup_all_rx_resources(adapter); - if (err) - goto err_setup_rx; - - ixgbe_configure(adapter); - - err = ixgbe_request_irq(adapter); - if (err) - goto err_req_irq; - - err = ixgbe_up_complete(adapter); - if (err) - goto err_up; - - netif_tx_start_all_queues(netdev); - - return 0; - -err_up: - ixgbe_release_hw_control(adapter); - ixgbe_free_irq(adapter); -err_req_irq: - ixgbe_free_all_rx_resources(adapter); -err_setup_rx: - ixgbe_free_all_tx_resources(adapter); -err_setup_tx: - ixgbe_reset(adapter); - - return err; -} - -/** - * ixgbe_close - Disables a network interface - * @netdev: network interface device structure - * - * Returns 0, this is not allowed to fail - * - * The close entry point is called when an interface is de-activated - * by the OS. The hardware is still under the drivers control, but - * needs to be disabled. A global MAC reset is issued to stop the - * hardware, and all transmit and receive resources are freed. - **/ -static int ixgbe_close(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - ixgbe_down(adapter); - ixgbe_free_irq(adapter); - - ixgbe_free_all_tx_resources(adapter); - ixgbe_free_all_rx_resources(adapter); - - ixgbe_release_hw_control(adapter); - - return 0; -} - -/** - * ixgbe_update_stats - Update the board statistics counters. - * @adapter: board private structure - **/ -void ixgbe_update_stats(struct ixgbe_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - u64 total_mpc = 0; - u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot; - - adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS); - for (i = 0; i < 8; i++) { - /* for packet buffers not used, the register should read 0 */ - mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i)); - missed_rx += mpc; - adapter->stats.mpc[i] += mpc; - total_mpc += adapter->stats.mpc[i]; - adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i)); - } - adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC); - /* work around hardware counting issue */ - adapter->stats.gprc -= missed_rx; - - /* 82598 hardware only has a 32 bit counter in the high register */ - adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH); - adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH); - adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH); - bprc = IXGBE_READ_REG(hw, IXGBE_BPRC); - adapter->stats.bprc += bprc; - adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC); - adapter->stats.mprc -= bprc; - adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC); - adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64); - adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127); - adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255); - adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511); - adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023); - adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522); - adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC); - adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC); - adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC); - lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC); - adapter->stats.lxontxc += lxon; - lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC); - adapter->stats.lxofftxc += lxoff; - adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC); - adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC); - adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC); - /* - * 82598 errata - tx of flow control packets is included in tx counters - */ - xon_off_tot = lxon + lxoff; - adapter->stats.gptc -= xon_off_tot; - adapter->stats.mptc -= xon_off_tot; - adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN)); - adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC); - adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC); - adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC); - adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR); - adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64); - adapter->stats.ptc64 -= xon_off_tot; - adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127); - adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255); - adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511); - adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023); - adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522); - adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC); - - /* Fill out the OS statistics structure */ - adapter->net_stats.multicast = adapter->stats.mprc; - - /* Rx Errors */ - adapter->net_stats.rx_errors = adapter->stats.crcerrs + - adapter->stats.rlec; - adapter->net_stats.rx_dropped = 0; - adapter->net_stats.rx_length_errors = adapter->stats.rlec; - adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs; - adapter->net_stats.rx_missed_errors = total_mpc; -} - -/** - * ixgbe_watchdog - Timer Call-back - * @data: pointer to adapter cast into an unsigned long - **/ -static void ixgbe_watchdog(unsigned long data) -{ - struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data; - struct net_device *netdev = adapter->netdev; - bool link_up; - u32 link_speed = 0; - - adapter->hw.mac.ops.check_link(&adapter->hw, &(link_speed), &link_up); - - if (link_up) { - if (!netif_carrier_ok(netdev)) { - u32 frctl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL); - u32 rmcs = IXGBE_READ_REG(&adapter->hw, IXGBE_RMCS); -#define FLOW_RX (frctl & IXGBE_FCTRL_RFCE) -#define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X) - DPRINTK(LINK, INFO, "NIC Link is Up %s, " - "Flow Control: %s\n", - (link_speed == IXGBE_LINK_SPEED_10GB_FULL ? - "10 Gbps" : - (link_speed == IXGBE_LINK_SPEED_1GB_FULL ? - "1 Gbps" : "unknown speed")), - ((FLOW_RX && FLOW_TX) ? "RX/TX" : - (FLOW_RX ? "RX" : - (FLOW_TX ? "TX" : "None")))); - - netif_carrier_on(netdev); - netif_tx_wake_all_queues(netdev); - } else { - /* Force detection of hung controller */ - adapter->detect_tx_hung = true; - } - } else { - if (netif_carrier_ok(netdev)) { - DPRINTK(LINK, INFO, "NIC Link is Down\n"); - netif_carrier_off(netdev); - netif_tx_stop_all_queues(netdev); - } - } - - ixgbe_update_stats(adapter); - - if (!test_bit(__IXGBE_DOWN, &adapter->state)) { - /* Cause software interrupt to ensure rx rings are cleaned */ - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - u32 eics = - (1 << (adapter->num_msix_vectors - NON_Q_VECTORS)) - 1; - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, eics); - } else { - /* for legacy and MSI interrupts don't set any bits that - * are enabled for EIAM, because this operation would - * set *both* EIMS and EICS for any bit in EIAM */ - IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, - (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER)); - } - /* Reset the timer */ - mod_timer(&adapter->watchdog_timer, - round_jiffies(jiffies + 2 * HZ)); - } -} - -static int ixgbe_tso(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring, struct sk_buff *skb, - u32 tx_flags, u8 *hdr_len) -{ - struct ixgbe_adv_tx_context_desc *context_desc; - unsigned int i; - int err; - struct ixgbe_tx_buffer *tx_buffer_info; - u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0; - u32 mss_l4len_idx = 0, l4len; - - if (skb_is_gso(skb)) { - if (skb_header_cloned(skb)) { - err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); - if (err) - return err; - } - l4len = tcp_hdrlen(skb); - *hdr_len += l4len; - - if (skb->protocol == htons(ETH_P_IP)) { - struct iphdr *iph = ip_hdr(skb); - iph->tot_len = 0; - iph->check = 0; - tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, - iph->daddr, 0, - IPPROTO_TCP, - 0); - adapter->hw_tso_ctxt++; - } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) { - ipv6_hdr(skb)->payload_len = 0; - tcp_hdr(skb)->check = - ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, - &ipv6_hdr(skb)->daddr, - 0, IPPROTO_TCP, 0); - adapter->hw_tso6_ctxt++; - } - - i = tx_ring->next_to_use; - - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i); - - /* VLAN MACLEN IPLEN */ - if (tx_flags & IXGBE_TX_FLAGS_VLAN) - vlan_macip_lens |= - (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK); - vlan_macip_lens |= ((skb_network_offset(skb)) << - IXGBE_ADVTXD_MACLEN_SHIFT); - *hdr_len += skb_network_offset(skb); - vlan_macip_lens |= - (skb_transport_header(skb) - skb_network_header(skb)); - *hdr_len += - (skb_transport_header(skb) - skb_network_header(skb)); - context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); - context_desc->seqnum_seed = 0; - - /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ - type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT | - IXGBE_ADVTXD_DTYP_CTXT); - - if (skb->protocol == htons(ETH_P_IP)) - type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4; - type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP; - context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl); - - /* MSS L4LEN IDX */ - mss_l4len_idx |= - (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT); - mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT); - context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); - - tx_buffer_info->time_stamp = jiffies; - tx_buffer_info->next_to_watch = i; - - i++; - if (i == tx_ring->count) - i = 0; - tx_ring->next_to_use = i; - - return true; - } - return false; -} - -static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring, - struct sk_buff *skb, u32 tx_flags) -{ - struct ixgbe_adv_tx_context_desc *context_desc; - unsigned int i; - struct ixgbe_tx_buffer *tx_buffer_info; - u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0; - - if (skb->ip_summed == CHECKSUM_PARTIAL || - (tx_flags & IXGBE_TX_FLAGS_VLAN)) { - i = tx_ring->next_to_use; - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i); - - if (tx_flags & IXGBE_TX_FLAGS_VLAN) - vlan_macip_lens |= - (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK); - vlan_macip_lens |= (skb_network_offset(skb) << - IXGBE_ADVTXD_MACLEN_SHIFT); - if (skb->ip_summed == CHECKSUM_PARTIAL) - vlan_macip_lens |= (skb_transport_header(skb) - - skb_network_header(skb)); - - context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); - context_desc->seqnum_seed = 0; - - type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT | - IXGBE_ADVTXD_DTYP_CTXT); - - if (skb->ip_summed == CHECKSUM_PARTIAL) { - switch (skb->protocol) { - case __constant_htons(ETH_P_IP): - type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4; - if (ip_hdr(skb)->protocol == IPPROTO_TCP) - type_tucmd_mlhl |= - IXGBE_ADVTXD_TUCMD_L4T_TCP; - break; - - case __constant_htons(ETH_P_IPV6): - /* XXX what about other V6 headers?? */ - if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) - type_tucmd_mlhl |= - IXGBE_ADVTXD_TUCMD_L4T_TCP; - break; - - default: - if (unlikely(net_ratelimit())) { - DPRINTK(PROBE, WARNING, - "partial checksum but proto=%x!\n", - skb->protocol); - } - break; - } - } - - context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl); - context_desc->mss_l4len_idx = 0; - - tx_buffer_info->time_stamp = jiffies; - tx_buffer_info->next_to_watch = i; - adapter->hw_csum_tx_good++; - i++; - if (i == tx_ring->count) - i = 0; - tx_ring->next_to_use = i; - - return true; - } - return false; -} - -static int ixgbe_tx_map(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring, - struct sk_buff *skb, unsigned int first) -{ - struct ixgbe_tx_buffer *tx_buffer_info; - unsigned int len = skb->len; - unsigned int offset = 0, size, count = 0, i; - unsigned int nr_frags = skb_shinfo(skb)->nr_frags; - unsigned int f; - - len -= skb->data_len; - - i = tx_ring->next_to_use; - - while (len) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD); - - tx_buffer_info->length = size; - tx_buffer_info->dma = pci_map_single(adapter->pdev, - skb->data + offset, - size, PCI_DMA_TODEVICE); - tx_buffer_info->time_stamp = jiffies; - tx_buffer_info->next_to_watch = i; - - len -= size; - offset += size; - count++; - i++; - if (i == tx_ring->count) - i = 0; - } - - for (f = 0; f < nr_frags; f++) { - struct skb_frag_struct *frag; - - frag = &skb_shinfo(skb)->frags[f]; - len = frag->size; - offset = frag->page_offset; - - while (len) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD); - - tx_buffer_info->length = size; - tx_buffer_info->dma = pci_map_page(adapter->pdev, - frag->page, - offset, - size, PCI_DMA_TODEVICE); - tx_buffer_info->time_stamp = jiffies; - tx_buffer_info->next_to_watch = i; - - len -= size; - offset += size; - count++; - i++; - if (i == tx_ring->count) - i = 0; - } - } - if (i == 0) - i = tx_ring->count - 1; - else - i = i - 1; - tx_ring->tx_buffer_info[i].skb = skb; - tx_ring->tx_buffer_info[first].next_to_watch = i; - - return count; -} - -static void ixgbe_tx_queue(struct ixgbe_adapter *adapter, - struct ixgbe_ring *tx_ring, - int tx_flags, int count, u32 paylen, u8 hdr_len) -{ - union ixgbe_adv_tx_desc *tx_desc = NULL; - struct ixgbe_tx_buffer *tx_buffer_info; - u32 olinfo_status = 0, cmd_type_len = 0; - unsigned int i; - u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS; - - cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA; - - cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT; - - if (tx_flags & IXGBE_TX_FLAGS_VLAN) - cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE; - - if (tx_flags & IXGBE_TX_FLAGS_TSO) { - cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE; - - olinfo_status |= IXGBE_TXD_POPTS_TXSM << - IXGBE_ADVTXD_POPTS_SHIFT; - - if (tx_flags & IXGBE_TX_FLAGS_IPV4) - olinfo_status |= IXGBE_TXD_POPTS_IXSM << - IXGBE_ADVTXD_POPTS_SHIFT; - - } else if (tx_flags & IXGBE_TX_FLAGS_CSUM) - olinfo_status |= IXGBE_TXD_POPTS_TXSM << - IXGBE_ADVTXD_POPTS_SHIFT; - - olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT); - - i = tx_ring->next_to_use; - while (count--) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i); - tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma); - tx_desc->read.cmd_type_len = - cpu_to_le32(cmd_type_len | tx_buffer_info->length); - tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); - - i++; - if (i == tx_ring->count) - i = 0; - } - - tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd); - - /* - * 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(); - - tx_ring->next_to_use = i; - writel(i, adapter->hw.hw_addr + tx_ring->tail); -} - -static int __ixgbe_maybe_stop_tx(struct net_device *netdev, - struct ixgbe_ring *tx_ring, int size) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - netif_stop_subqueue(netdev, tx_ring->queue_index); - /* 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 - * made room available. */ - if (likely(IXGBE_DESC_UNUSED(tx_ring) < size)) - return -EBUSY; - - /* A reprieve! - use start_queue because it doesn't call schedule */ - netif_wake_subqueue(netdev, tx_ring->queue_index); - ++adapter->restart_queue; - return 0; -} - -static int ixgbe_maybe_stop_tx(struct net_device *netdev, - struct ixgbe_ring *tx_ring, int size) -{ - if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size)) - return 0; - return __ixgbe_maybe_stop_tx(netdev, tx_ring, size); -} - - -static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct ixgbe_ring *tx_ring; - unsigned int len = skb->len; - unsigned int first; - unsigned int tx_flags = 0; - u8 hdr_len = 0; - int r_idx = 0, tso; - unsigned int mss = 0; - int count = 0; - unsigned int f; - unsigned int nr_frags = skb_shinfo(skb)->nr_frags; - len -= skb->data_len; - r_idx = (adapter->num_tx_queues - 1) & skb->queue_mapping; - tx_ring = &adapter->tx_ring[r_idx]; - - - if (skb->len <= 0) { - dev_kfree_skb(skb); - return NETDEV_TX_OK; - } - mss = skb_shinfo(skb)->gso_size; - - if (mss) - count++; - else if (skb->ip_summed == CHECKSUM_PARTIAL) - count++; - - count += TXD_USE_COUNT(len); - for (f = 0; f < nr_frags; f++) - count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); - - if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) { - adapter->tx_busy++; - return NETDEV_TX_BUSY; - } - if (adapter->vlgrp && vlan_tx_tag_present(skb)) { - tx_flags |= IXGBE_TX_FLAGS_VLAN; - tx_flags |= (vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT); - } - - if (skb->protocol == htons(ETH_P_IP)) - tx_flags |= IXGBE_TX_FLAGS_IPV4; - first = tx_ring->next_to_use; - tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len); - if (tso < 0) { - dev_kfree_skb_any(skb); - return NETDEV_TX_OK; - } - - if (tso) - tx_flags |= IXGBE_TX_FLAGS_TSO; - else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) && - (skb->ip_summed == CHECKSUM_PARTIAL)) - tx_flags |= IXGBE_TX_FLAGS_CSUM; - - ixgbe_tx_queue(adapter, tx_ring, tx_flags, - ixgbe_tx_map(adapter, tx_ring, skb, first), - skb->len, hdr_len); - - netdev->trans_start = jiffies; - - ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED); - - return NETDEV_TX_OK; -} - -/** - * ixgbe_get_stats - Get System Network Statistics - * @netdev: network interface device structure - * - * Returns the address of the device statistics structure. - * The statistics are actually updated from the timer callback. - **/ -static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - /* only return the current stats */ - return &adapter->net_stats; -} - -/** - * ixgbe_set_mac - Change the Ethernet Address of the NIC - * @netdev: network interface device structure - * @p: pointer to an address structure - * - * Returns 0 on success, negative on failure - **/ -static int ixgbe_set_mac(struct net_device *netdev, void *p) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - struct sockaddr *addr = p; - - if (!is_valid_ether_addr(addr->sa_data)) - return -EADDRNOTAVAIL; - - memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); - memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len); - - ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV); - - return 0; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -/* - * 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. - */ -static void ixgbe_netpoll(struct net_device *netdev) -{ - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - disable_irq(adapter->pdev->irq); - adapter->flags |= IXGBE_FLAG_IN_NETPOLL; - ixgbe_intr(adapter->pdev->irq, netdev); - adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL; - enable_irq(adapter->pdev->irq); -} -#endif - -/** - * ixgbe_napi_add_all - prep napi structs for use - * @adapter: private struct - * helper function to napi_add each possible q_vector->napi - */ -static void ixgbe_napi_add_all(struct ixgbe_adapter *adapter) -{ - int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - int (*poll)(struct napi_struct *, int); - - if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { - poll = &ixgbe_clean_rxonly; - } else { - poll = &ixgbe_poll; - /* only one q_vector for legacy modes */ - q_vectors = 1; - } - - for (i = 0; i < q_vectors; i++) { - struct ixgbe_q_vector *q_vector = &adapter->q_vector[i]; - netif_napi_add(adapter->netdev, &q_vector->napi, - (*poll), 64); - } -} - -/** - * ixgbe_probe - Device Initialization Routine - * @pdev: PCI device information struct - * @ent: entry in ixgbe_pci_tbl - * - * Returns 0 on success, negative on failure - * - * ixgbe_probe initializes an adapter identified by a pci_dev structure. - * The OS initialization, configuring of the adapter private structure, - * and a hardware reset occur. - **/ -static int __devinit ixgbe_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - struct net_device *netdev; - struct ixgbe_adapter *adapter = NULL; - struct ixgbe_hw *hw; - const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data]; - unsigned long mmio_start, mmio_len; - static int cards_found; - int i, err, pci_using_dac; - u16 link_status, link_speed, link_width; - u32 part_num; - - err = pci_enable_device(pdev); - if (err) - return err; - - if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) && - !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) { - pci_using_dac = 1; - } else { - err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); - if (err) { - err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); - if (err) { - dev_err(&pdev->dev, "No usable DMA " - "configuration, aborting\n"); - goto err_dma; - } - } - pci_using_dac = 0; - } - - err = pci_request_regions(pdev, ixgbe_driver_name); - if (err) { - dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err); - goto err_pci_reg; - } - - pci_set_master(pdev); - pci_save_state(pdev); - - netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES); - if (!netdev) { - err = -ENOMEM; - goto err_alloc_etherdev; - } - - SET_NETDEV_DEV(netdev, &pdev->dev); - - pci_set_drvdata(pdev, netdev); - adapter = netdev_priv(netdev); - - adapter->netdev = netdev; - adapter->pdev = pdev; - hw = &adapter->hw; - hw->back = adapter; - adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1; - - mmio_start = pci_resource_start(pdev, 0); - mmio_len = pci_resource_len(pdev, 0); - - hw->hw_addr = ioremap(mmio_start, mmio_len); - if (!hw->hw_addr) { - err = -EIO; - goto err_ioremap; - } - - for (i = 1; i <= 5; i++) { - if (pci_resource_len(pdev, i) == 0) - continue; - } - - netdev->open = &ixgbe_open; - netdev->stop = &ixgbe_close; - netdev->hard_start_xmit = &ixgbe_xmit_frame; - netdev->get_stats = &ixgbe_get_stats; - netdev->set_multicast_list = &ixgbe_set_multi; - netdev->set_mac_address = &ixgbe_set_mac; - netdev->change_mtu = &ixgbe_change_mtu; - ixgbe_set_ethtool_ops(netdev); - netdev->tx_timeout = &ixgbe_tx_timeout; - netdev->watchdog_timeo = 5 * HZ; - netdev->vlan_rx_register = ixgbe_vlan_rx_register; - netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid; - netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid; -#ifdef CONFIG_NET_POLL_CONTROLLER - netdev->poll_controller = ixgbe_netpoll; -#endif - strcpy(netdev->name, pci_name(pdev)); - - netdev->mem_start = mmio_start; - netdev->mem_end = mmio_start + mmio_len; - - adapter->bd_number = cards_found; - - /* PCI config space info */ - hw->vendor_id = pdev->vendor; - hw->device_id = pdev->device; - hw->revision_id = pdev->revision; - hw->subsystem_vendor_id = pdev->subsystem_vendor; - hw->subsystem_device_id = pdev->subsystem_device; - - /* Setup hw api */ - memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops)); - hw->mac.type = ii->mac; - - err = ii->get_invariants(hw); - if (err) - goto err_hw_init; - - /* setup the private structure */ - err = ixgbe_sw_init(adapter); - if (err) - goto err_sw_init; - - netdev->features = NETIF_F_SG | - NETIF_F_HW_CSUM | - NETIF_F_HW_VLAN_TX | - NETIF_F_HW_VLAN_RX | - NETIF_F_HW_VLAN_FILTER; - - netdev->features |= NETIF_F_LRO; - netdev->features |= NETIF_F_TSO; - netdev->features |= NETIF_F_TSO6; - - netdev->vlan_features |= NETIF_F_TSO; - netdev->vlan_features |= NETIF_F_TSO6; - netdev->vlan_features |= NETIF_F_HW_CSUM; - netdev->vlan_features |= NETIF_F_SG; - - if (pci_using_dac) - netdev->features |= NETIF_F_HIGHDMA; - - /* make sure the EEPROM is good */ - if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) { - dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n"); - err = -EIO; - goto err_eeprom; - } - - memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len); - memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len); - - if (ixgbe_validate_mac_addr(netdev->dev_addr)) { - err = -EIO; - goto err_eeprom; - } - - init_timer(&adapter->watchdog_timer); - adapter->watchdog_timer.function = &ixgbe_watchdog; - adapter->watchdog_timer.data = (unsigned long)adapter; - - INIT_WORK(&adapter->reset_task, ixgbe_reset_task); - - /* initialize default flow control settings */ - hw->fc.original_type = ixgbe_fc_full; - hw->fc.type = ixgbe_fc_full; - hw->fc.high_water = IXGBE_DEFAULT_FCRTH; - hw->fc.low_water = IXGBE_DEFAULT_FCRTL; - hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE; - - err = ixgbe_init_interrupt_scheme(adapter); - if (err) - goto err_sw_init; - - /* print bus type/speed/width info */ - pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status); - link_speed = link_status & IXGBE_PCI_LINK_SPEED; - link_width = link_status & IXGBE_PCI_LINK_WIDTH; - dev_info(&pdev->dev, "(PCI Express:%s:%s) " - "%02x:%02x:%02x:%02x:%02x:%02x\n", - ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" : - (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" : - "Unknown"), - ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" : - (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" : - (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" : - (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" : - "Unknown"), - netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2], - netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]); - ixgbe_read_part_num(hw, &part_num); - dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n", - hw->mac.type, hw->phy.type, - (part_num >> 8), (part_num & 0xff)); - - if (link_width <= IXGBE_PCI_LINK_WIDTH_4) { - dev_warn(&pdev->dev, "PCI-Express bandwidth available for " - "this card is not sufficient for optimal " - "performance.\n"); - dev_warn(&pdev->dev, "For optimal performance a x8 " - "PCI-Express slot is required.\n"); - } - - /* reset the hardware with the new settings */ - ixgbe_start_hw(hw); - - netif_carrier_off(netdev); - netif_tx_stop_all_queues(netdev); - - ixgbe_napi_add_all(adapter); - - strcpy(netdev->name, "eth%d"); - err = register_netdev(netdev); - if (err) - goto err_register; - -#ifdef CONFIG_DCA - if (dca_add_requester(&pdev->dev) == 0) { - adapter->flags |= IXGBE_FLAG_DCA_ENABLED; - /* always use CB2 mode, difference is masked - * in the CB driver */ - IXGBE_WRITE_REG(hw, IXGBE_DCA_CTRL, 2); - ixgbe_setup_dca(adapter); - } -#endif - - dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n"); - cards_found++; - return 0; - -err_register: - ixgbe_release_hw_control(adapter); -err_hw_init: -err_sw_init: - ixgbe_reset_interrupt_capability(adapter); -err_eeprom: - iounmap(hw->hw_addr); -err_ioremap: - free_netdev(netdev); -err_alloc_etherdev: - pci_release_regions(pdev); -err_pci_reg: -err_dma: - pci_disable_device(pdev); - return err; -} - -/** - * ixgbe_remove - Device Removal Routine - * @pdev: PCI device information struct - * - * ixgbe_remove is called by the PCI subsystem to alert the driver - * that it should release a PCI device. The could be caused by a - * Hot-Plug event, or because the driver is going to be removed from - * memory. - **/ -static void __devexit ixgbe_remove(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgbe_adapter *adapter = netdev_priv(netdev); - - set_bit(__IXGBE_DOWN, &adapter->state); - del_timer_sync(&adapter->watchdog_timer); - - flush_scheduled_work(); - -#ifdef CONFIG_DCA - if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { - adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED; - dca_remove_requester(&pdev->dev); - IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1); - } - -#endif - unregister_netdev(netdev); - - ixgbe_reset_interrupt_capability(adapter); - - ixgbe_release_hw_control(adapter); - - iounmap(adapter->hw.hw_addr); - pci_release_regions(pdev); - - DPRINTK(PROBE, INFO, "complete\n"); - kfree(adapter->tx_ring); - kfree(adapter->rx_ring); - - free_netdev(netdev); - - pci_disable_device(pdev); -} - -/** - * ixgbe_io_error_detected - called when PCI error is detected - * @pdev: Pointer to PCI device - * @state: The current pci connection state - * - * This function is called after a PCI bus error affecting - * this device has been detected. - */ -static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev, - pci_channel_state_t state) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgbe_adapter *adapter = netdev->priv; - - netif_device_detach(netdev); - - if (netif_running(netdev)) - ixgbe_down(adapter); - pci_disable_device(pdev); - - /* Request a slot slot reset. */ - return PCI_ERS_RESULT_NEED_RESET; -} - -/** - * ixgbe_io_slot_reset - called after the pci bus has been reset. - * @pdev: Pointer to PCI device - * - * Restart the card from scratch, as if from a cold-boot. - */ -static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgbe_adapter *adapter = netdev->priv; - - if (pci_enable_device(pdev)) { - DPRINTK(PROBE, ERR, - "Cannot re-enable PCI device after reset.\n"); - return PCI_ERS_RESULT_DISCONNECT; - } - pci_set_master(pdev); - pci_restore_state(pdev); - - pci_enable_wake(pdev, PCI_D3hot, 0); - pci_enable_wake(pdev, PCI_D3cold, 0); - - ixgbe_reset(adapter); - - return PCI_ERS_RESULT_RECOVERED; -} - -/** - * ixgbe_io_resume - called when traffic can start flowing again. - * @pdev: Pointer to PCI device - * - * This callback is called when the error recovery driver tells us that - * its OK to resume normal operation. - */ -static void ixgbe_io_resume(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgbe_adapter *adapter = netdev->priv; - - if (netif_running(netdev)) { - if (ixgbe_up(adapter)) { - DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n"); - return; - } - } - - netif_device_attach(netdev); - -} - -static struct pci_error_handlers ixgbe_err_handler = { - .error_detected = ixgbe_io_error_detected, - .slot_reset = ixgbe_io_slot_reset, - .resume = ixgbe_io_resume, -}; - -static struct pci_driver ixgbe_driver = { - .name = ixgbe_driver_name, - .id_table = ixgbe_pci_tbl, - .probe = ixgbe_probe, - .remove = __devexit_p(ixgbe_remove), -#ifdef CONFIG_PM - .suspend = ixgbe_suspend, - .resume = ixgbe_resume, -#endif - .shutdown = ixgbe_shutdown, - .err_handler = &ixgbe_err_handler -}; - -/** - * ixgbe_init_module - Driver Registration Routine - * - * ixgbe_init_module is the first routine called when the driver is - * loaded. All it does is register with the PCI subsystem. - **/ -static int __init ixgbe_init_module(void) -{ - int ret; - printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name, - ixgbe_driver_string, ixgbe_driver_version); - - printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright); - -#ifdef CONFIG_DCA - dca_register_notify(&dca_notifier); - -#endif - ret = pci_register_driver(&ixgbe_driver); - return ret; -} -module_init(ixgbe_init_module); - -/** - * ixgbe_exit_module - Driver Exit Cleanup Routine - * - * ixgbe_exit_module is called just before the driver is removed - * from memory. - **/ -static void __exit ixgbe_exit_module(void) -{ -#ifdef CONFIG_DCA - dca_unregister_notify(&dca_notifier); -#endif - pci_unregister_driver(&ixgbe_driver); -} - -#ifdef CONFIG_DCA -static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event, - void *p) -{ - int ret_val; - - ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event, - __ixgbe_notify_dca); - - return ret_val ? NOTIFY_BAD : NOTIFY_DONE; -} -#endif /* CONFIG_DCA */ - -module_exit(ixgbe_exit_module); - -/* ixgbe_main.c */ |