| /******************************************************************************* |
| |
| Intel 82599 Virtual Function driver |
| Copyright(c) 1999 - 2009 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: |
| e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
| Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| |
| *******************************************************************************/ |
| |
| |
| /****************************************************************************** |
| Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code |
| ******************************************************************************/ |
| #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 <linux/slab.h> |
| #include <net/checksum.h> |
| #include <net/ip6_checksum.h> |
| #include <linux/ethtool.h> |
| #include <linux/if_vlan.h> |
| |
| #include "ixgbevf.h" |
| |
| char ixgbevf_driver_name[] = "ixgbevf"; |
| static const char ixgbevf_driver_string[] = |
| "Intel(R) 82599 Virtual Function"; |
| |
| #define DRV_VERSION "1.0.0-k0" |
| const char ixgbevf_driver_version[] = DRV_VERSION; |
| static char ixgbevf_copyright[] = "Copyright (c) 2009 Intel Corporation."; |
| |
| static const struct ixgbevf_info *ixgbevf_info_tbl[] = { |
| [board_82599_vf] = &ixgbevf_vf_info, |
| }; |
| |
| /* ixgbevf_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 ixgbevf_pci_tbl[] = { |
| {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), |
| board_82599_vf}, |
| |
| /* required last entry */ |
| {0, } |
| }; |
| MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl); |
| |
| MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); |
| MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| |
| #define DEFAULT_DEBUG_LEVEL_SHIFT 3 |
| |
| /* forward decls */ |
| static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector); |
| static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx, |
| u32 itr_reg); |
| |
| static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw, |
| struct ixgbevf_ring *rx_ring, |
| u32 val) |
| { |
| /* |
| * 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(); |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val); |
| } |
| |
| /* |
| * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors |
| * @adapter: pointer to adapter struct |
| * @direction: 0 for Rx, 1 for Tx, -1 for other causes |
| * @queue: queue to map the corresponding interrupt to |
| * @msix_vector: the vector to map to the corresponding queue |
| * |
| */ |
| static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction, |
| u8 queue, u8 msix_vector) |
| { |
| u32 ivar, index; |
| struct ixgbe_hw *hw = &adapter->hw; |
| if (direction == -1) { |
| /* other causes */ |
| msix_vector |= IXGBE_IVAR_ALLOC_VAL; |
| ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC); |
| ivar &= ~0xFF; |
| ivar |= msix_vector; |
| IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar); |
| } else { |
| /* tx or rx causes */ |
| msix_vector |= IXGBE_IVAR_ALLOC_VAL; |
| index = ((16 * (queue & 1)) + (8 * direction)); |
| ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1)); |
| ivar &= ~(0xFF << index); |
| ivar |= (msix_vector << index); |
| IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar); |
| } |
| } |
| |
| static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_tx_buffer |
| *tx_buffer_info) |
| { |
| if (tx_buffer_info->dma) { |
| if (tx_buffer_info->mapped_as_page) |
| dma_unmap_page(&adapter->pdev->dev, |
| tx_buffer_info->dma, |
| tx_buffer_info->length, |
| DMA_TO_DEVICE); |
| else |
| dma_unmap_single(&adapter->pdev->dev, |
| tx_buffer_info->dma, |
| tx_buffer_info->length, |
| DMA_TO_DEVICE); |
| 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->time_stamp = 0; |
| /* tx_buffer_info must be completely set up in the transmit path */ |
| } |
| |
| static inline bool ixgbevf_check_tx_hang(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *tx_ring, |
| unsigned int eop) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 head, tail; |
| |
| /* Detect a transmit hang in hardware, this serializes the |
| * check with the clearing of time_stamp and movement of eop */ |
| head = readl(hw->hw_addr + tx_ring->head); |
| tail = readl(hw->hw_addr + tx_ring->tail); |
| adapter->detect_tx_hung = false; |
| if ((head != tail) && |
| tx_ring->tx_buffer_info[eop].time_stamp && |
| time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ)) { |
| /* detected Tx unit hang */ |
| union ixgbe_adv_tx_desc *tx_desc; |
| tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); |
| printk(KERN_ERR "Detected Tx Unit Hang\n" |
| " Tx Queue <%d>\n" |
| " TDH, TDT <%x>, <%x>\n" |
| " next_to_use <%x>\n" |
| " next_to_clean <%x>\n" |
| "tx_buffer_info[next_to_clean]\n" |
| " time_stamp <%lx>\n" |
| " jiffies <%lx>\n", |
| tx_ring->queue_index, |
| head, tail, |
| tx_ring->next_to_use, eop, |
| tx_ring->tx_buffer_info[eop].time_stamp, jiffies); |
| 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)) |
| #ifdef MAX_SKB_FRAGS |
| #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \ |
| MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */ |
| #else |
| #define DESC_NEEDED TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) |
| #endif |
| |
| static void ixgbevf_tx_timeout(struct net_device *netdev); |
| |
| /** |
| * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes |
| * @adapter: board private structure |
| * @tx_ring: tx ring to clean |
| **/ |
| static bool ixgbevf_clean_tx_irq(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *tx_ring) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct ixgbe_hw *hw = &adapter->hw; |
| union ixgbe_adv_tx_desc *tx_desc, *eop_desc; |
| struct ixgbevf_tx_buffer *tx_buffer_info; |
| unsigned int i, eop, count = 0; |
| unsigned int total_bytes = 0, total_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)) && |
| (count < tx_ring->work_limit)) { |
| bool cleaned = false; |
| for ( ; !cleaned; count++) { |
| struct sk_buff *skb; |
| tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i); |
| tx_buffer_info = &tx_ring->tx_buffer_info[i]; |
| cleaned = (i == eop); |
| skb = tx_buffer_info->skb; |
| |
| if (cleaned && skb) { |
| unsigned int segs, bytecount; |
| |
| /* gso_segs is currently only valid for tcp */ |
| segs = skb_shinfo(skb)->gso_segs ?: 1; |
| /* multiply data chunks by size of headers */ |
| bytecount = ((segs - 1) * skb_headlen(skb)) + |
| skb->len; |
| total_packets += segs; |
| total_bytes += bytecount; |
| } |
| |
| ixgbevf_unmap_and_free_tx_resource(adapter, |
| tx_buffer_info); |
| |
| tx_desc->wb.status = 0; |
| |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| } |
| |
| eop = tx_ring->tx_buffer_info[i].next_to_watch; |
| eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); |
| } |
| |
| tx_ring->next_to_clean = i; |
| |
| #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) |
| if (unlikely(count && 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(); |
| #ifdef HAVE_TX_MQ |
| if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) && |
| !test_bit(__IXGBEVF_DOWN, &adapter->state)) { |
| netif_wake_subqueue(netdev, tx_ring->queue_index); |
| ++adapter->restart_queue; |
| } |
| #else |
| if (netif_queue_stopped(netdev) && |
| !test_bit(__IXGBEVF_DOWN, &adapter->state)) { |
| netif_wake_queue(netdev); |
| ++adapter->restart_queue; |
| } |
| #endif |
| } |
| |
| if (adapter->detect_tx_hung) { |
| if (ixgbevf_check_tx_hang(adapter, tx_ring, i)) { |
| /* schedule immediate reset if we believe we hung */ |
| printk(KERN_INFO |
| "tx hang %d detected, resetting adapter\n", |
| adapter->tx_timeout_count + 1); |
| ixgbevf_tx_timeout(adapter->netdev); |
| } |
| } |
| |
| /* re-arm the interrupt */ |
| if ((count >= tx_ring->work_limit) && |
| (!test_bit(__IXGBEVF_DOWN, &adapter->state))) { |
| IXGBE_WRITE_REG(hw, IXGBE_VTEICS, tx_ring->v_idx); |
| } |
| |
| tx_ring->total_bytes += total_bytes; |
| tx_ring->total_packets += total_packets; |
| |
| adapter->net_stats.tx_bytes += total_bytes; |
| adapter->net_stats.tx_packets += total_packets; |
| |
| return (count < tx_ring->work_limit); |
| } |
| |
| /** |
| * ixgbevf_receive_skb - Send a completed packet up the stack |
| * @q_vector: structure containing interrupt and ring information |
| * @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 ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector, |
| struct sk_buff *skb, u8 status, |
| struct ixgbevf_ring *ring, |
| union ixgbe_adv_rx_desc *rx_desc) |
| { |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| bool is_vlan = (status & IXGBE_RXD_STAT_VP); |
| u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan); |
| int ret; |
| |
| if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) { |
| if (adapter->vlgrp && is_vlan) |
| vlan_gro_receive(&q_vector->napi, |
| adapter->vlgrp, |
| tag, skb); |
| else |
| napi_gro_receive(&q_vector->napi, skb); |
| } else { |
| if (adapter->vlgrp && is_vlan) |
| ret = vlan_hwaccel_rx(skb, adapter->vlgrp, tag); |
| else |
| ret = netif_rx(skb); |
| } |
| } |
| |
| /** |
| * ixgbevf_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 ixgbevf_rx_checksum(struct ixgbevf_adapter *adapter, |
| u32 status_err, struct sk_buff *skb) |
| { |
| skb->ip_summed = CHECKSUM_NONE; |
| |
| /* Rx csum disabled */ |
| if (!(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++; |
| } |
| |
| /** |
| * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split |
| * @adapter: address of board private structure |
| **/ |
| static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *rx_ring, |
| int cleaned_count) |
| { |
| struct pci_dev *pdev = adapter->pdev; |
| union ixgbe_adv_rx_desc *rx_desc; |
| struct ixgbevf_rx_buffer *bi; |
| struct sk_buff *skb; |
| unsigned int i; |
| unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN; |
| |
| i = rx_ring->next_to_use; |
| bi = &rx_ring->rx_buffer_info[i]; |
| |
| while (cleaned_count--) { |
| rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i); |
| |
| if (!bi->page_dma && |
| (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) { |
| if (!bi->page) { |
| bi->page = netdev_alloc_page(adapter->netdev); |
| if (!bi->page) { |
| adapter->alloc_rx_page_failed++; |
| goto no_buffers; |
| } |
| bi->page_offset = 0; |
| } else { |
| /* use a half page if we're re-using */ |
| bi->page_offset ^= (PAGE_SIZE / 2); |
| } |
| |
| bi->page_dma = dma_map_page(&pdev->dev, bi->page, |
| bi->page_offset, |
| (PAGE_SIZE / 2), |
| DMA_FROM_DEVICE); |
| } |
| |
| skb = bi->skb; |
| if (!skb) { |
| skb = netdev_alloc_skb(adapter->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); |
| |
| bi->skb = skb; |
| } |
| if (!bi->dma) { |
| bi->dma = dma_map_single(&pdev->dev, skb->data, |
| rx_ring->rx_buf_len, |
| DMA_FROM_DEVICE); |
| } |
| /* 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(bi->page_dma); |
| rx_desc->read.hdr_addr = cpu_to_le64(bi->dma); |
| } else { |
| rx_desc->read.pkt_addr = cpu_to_le64(bi->dma); |
| } |
| |
| i++; |
| if (i == rx_ring->count) |
| i = 0; |
| bi = &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); |
| |
| ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i); |
| } |
| } |
| |
| static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter, |
| u64 qmask) |
| { |
| u32 mask; |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| mask = (qmask & 0xFFFFFFFF); |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask); |
| } |
| |
| static inline u16 ixgbevf_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc) |
| { |
| return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info; |
| } |
| |
| static inline u16 ixgbevf_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc) |
| { |
| return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; |
| } |
| |
| static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector, |
| struct ixgbevf_ring *rx_ring, |
| int *work_done, int work_to_do) |
| { |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| struct pci_dev *pdev = adapter->pdev; |
| union ixgbe_adv_rx_desc *rx_desc, *next_rxd; |
| struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer; |
| struct sk_buff *skb; |
| unsigned int i; |
| u32 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; |
| 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) { |
| u32 upper_len = 0; |
| if (*work_done >= work_to_do) |
| break; |
| (*work_done)++; |
| |
| if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { |
| hdr_info = le16_to_cpu(ixgbevf_get_hdr_info(rx_desc)); |
| len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >> |
| IXGBE_RXDADV_HDRBUFLEN_SHIFT; |
| if (hdr_info & IXGBE_RXDADV_SPH) |
| adapter->rx_hdr_split++; |
| if (len > IXGBEVF_RX_HDR_SIZE) |
| len = IXGBEVF_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 (rx_buffer_info->dma) { |
| dma_unmap_single(&pdev->dev, rx_buffer_info->dma, |
| rx_ring->rx_buf_len, |
| DMA_FROM_DEVICE); |
| rx_buffer_info->dma = 0; |
| skb_put(skb, len); |
| } |
| |
| if (upper_len) { |
| dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma, |
| PAGE_SIZE / 2, DMA_FROM_DEVICE); |
| rx_buffer_info->page_dma = 0; |
| skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, |
| rx_buffer_info->page, |
| rx_buffer_info->page_offset, |
| upper_len); |
| |
| if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) || |
| (page_count(rx_buffer_info->page) != 1)) |
| rx_buffer_info->page = NULL; |
| else |
| get_page(rx_buffer_info->page); |
| |
| skb->len += upper_len; |
| skb->data_len += upper_len; |
| skb->truesize += upper_len; |
| } |
| |
| i++; |
| if (i == rx_ring->count) |
| i = 0; |
| |
| next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i); |
| prefetch(next_rxd); |
| cleaned_count++; |
| |
| next_buffer = &rx_ring->rx_buffer_info[i]; |
| |
| if (!(staterr & IXGBE_RXD_STAT_EOP)) { |
| if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { |
| rx_buffer_info->skb = next_buffer->skb; |
| rx_buffer_info->dma = next_buffer->dma; |
| next_buffer->skb = skb; |
| next_buffer->dma = 0; |
| } else { |
| skb->next = next_buffer->skb; |
| skb->next->prev = skb; |
| } |
| adapter->non_eop_descs++; |
| goto next_desc; |
| } |
| |
| /* ERR_MASK will only have valid bits if EOP set */ |
| if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) { |
| dev_kfree_skb_irq(skb); |
| goto next_desc; |
| } |
| |
| ixgbevf_rx_checksum(adapter, staterr, skb); |
| |
| /* probably a little skewed due to removing CRC */ |
| total_rx_bytes += skb->len; |
| total_rx_packets++; |
| |
| /* |
| * Work around issue of some types of VM to VM loop back |
| * packets not getting split correctly |
| */ |
| if (staterr & IXGBE_RXD_STAT_LB) { |
| u32 header_fixup_len = skb_headlen(skb); |
| if (header_fixup_len < 14) |
| skb_push(skb, header_fixup_len); |
| } |
| skb->protocol = eth_type_trans(skb, adapter->netdev); |
| |
| ixgbevf_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc); |
| |
| next_desc: |
| rx_desc->wb.upper.status_error = 0; |
| |
| /* return some buffers to hardware, one at a time is too slow */ |
| if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) { |
| ixgbevf_alloc_rx_buffers(adapter, rx_ring, |
| cleaned_count); |
| cleaned_count = 0; |
| } |
| |
| /* use prefetched values */ |
| rx_desc = next_rxd; |
| rx_buffer_info = &rx_ring->rx_buffer_info[i]; |
| |
| staterr = le32_to_cpu(rx_desc->wb.upper.status_error); |
| } |
| |
| rx_ring->next_to_clean = i; |
| cleaned_count = IXGBE_DESC_UNUSED(rx_ring); |
| |
| if (cleaned_count) |
| ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count); |
| |
| 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; |
| } |
| |
| /** |
| * ixgbevf_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 |
| * |
| * This function is optimized for cleaning one queue only on a single |
| * q_vector!!! |
| **/ |
| static int ixgbevf_clean_rxonly(struct napi_struct *napi, int budget) |
| { |
| struct ixgbevf_q_vector *q_vector = |
| container_of(napi, struct ixgbevf_q_vector, napi); |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| struct ixgbevf_ring *rx_ring = NULL; |
| int work_done = 0; |
| long r_idx; |
| |
| r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); |
| rx_ring = &(adapter->rx_ring[r_idx]); |
| |
| ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget); |
| |
| /* If all Rx work done, exit the polling mode */ |
| if (work_done < budget) { |
| napi_complete(napi); |
| if (adapter->itr_setting & 1) |
| ixgbevf_set_itr_msix(q_vector); |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| ixgbevf_irq_enable_queues(adapter, rx_ring->v_idx); |
| } |
| |
| return work_done; |
| } |
| |
| /** |
| * ixgbevf_clean_rxonly_many - 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 |
| * |
| * This function will clean more than one rx queue associated with a |
| * q_vector. |
| **/ |
| static int ixgbevf_clean_rxonly_many(struct napi_struct *napi, int budget) |
| { |
| struct ixgbevf_q_vector *q_vector = |
| container_of(napi, struct ixgbevf_q_vector, napi); |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| struct ixgbevf_ring *rx_ring = NULL; |
| int work_done = 0, i; |
| long r_idx; |
| u64 enable_mask = 0; |
| |
| /* attempt to distribute budget to each queue fairly, but don't allow |
| * the budget to go below 1 because we'll exit polling */ |
| budget /= (q_vector->rxr_count ?: 1); |
| budget = max(budget, 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]); |
| ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget); |
| enable_mask |= rx_ring->v_idx; |
| r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues, |
| r_idx + 1); |
| } |
| |
| #ifndef HAVE_NETDEV_NAPI_LIST |
| if (!netif_running(adapter->netdev)) |
| work_done = 0; |
| |
| #endif |
| r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); |
| rx_ring = &(adapter->rx_ring[r_idx]); |
| |
| /* If all Rx work done, exit the polling mode */ |
| if (work_done < budget) { |
| napi_complete(napi); |
| if (adapter->itr_setting & 1) |
| ixgbevf_set_itr_msix(q_vector); |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| ixgbevf_irq_enable_queues(adapter, enable_mask); |
| } |
| |
| return work_done; |
| } |
| |
| |
| /** |
| * ixgbevf_configure_msix - Configure MSI-X hardware |
| * @adapter: board private structure |
| * |
| * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X |
| * interrupts. |
| **/ |
| static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbevf_q_vector *q_vector; |
| struct ixgbe_hw *hw = &adapter->hw; |
| 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_set_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; |
| ixgbevf_set_ivar(adapter, 0, 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; |
| ixgbevf_set_ivar(adapter, 1, 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 halve the interrupt rate */ |
| if (q_vector->txr_count && !q_vector->rxr_count) |
| q_vector->eitr = (adapter->eitr_param >> 1); |
| else if (q_vector->rxr_count) |
| /* rx only */ |
| q_vector->eitr = adapter->eitr_param; |
| |
| ixgbevf_write_eitr(adapter, v_idx, q_vector->eitr); |
| } |
| |
| ixgbevf_set_ivar(adapter, -1, 1, v_idx); |
| |
| /* set up to autoclear timer, and the vectors */ |
| mask = IXGBE_EIMS_ENABLE_MASK; |
| mask &= ~IXGBE_EIMS_OTHER; |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, mask); |
| } |
| |
| enum latency_range { |
| lowest_latency = 0, |
| low_latency = 1, |
| bulk_latency = 2, |
| latency_invalid = 255 |
| }; |
| |
| /** |
| * ixgbevf_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. |
| **/ |
| static u8 ixgbevf_update_itr(struct ixgbevf_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; |
| } |
| |
| /** |
| * ixgbevf_write_eitr - write VTEITR register in hardware specific way |
| * @adapter: pointer to adapter struct |
| * @v_idx: vector index into q_vector array |
| * @itr_reg: new value to be written in *register* format, not ints/s |
| * |
| * This function is made to be called by ethtool and by the driver |
| * when it needs to update VTEITR registers at runtime. Hardware |
| * specific quirks/differences are taken care of here. |
| */ |
| static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx, |
| u32 itr_reg) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| itr_reg = EITR_INTS_PER_SEC_TO_REG(itr_reg); |
| |
| /* |
| * set the WDIS bit to not clear the timer bits and cause an |
| * immediate assertion of the interrupt |
| */ |
| itr_reg |= IXGBE_EITR_CNT_WDIS; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg); |
| } |
| |
| static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector) |
| { |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| u32 new_itr; |
| u8 current_itr, ret_itr; |
| int i, r_idx, v_idx = q_vector->v_idx; |
| struct ixgbevf_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 = ixgbevf_update_itr(adapter, q_vector->eitr, |
| q_vector->tx_itr, |
| 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_itr = ((q_vector->tx_itr > ret_itr) ? |
| q_vector->tx_itr - 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 = ixgbevf_update_itr(adapter, q_vector->eitr, |
| q_vector->rx_itr, |
| 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_itr = ((q_vector->rx_itr > ret_itr) ? |
| q_vector->rx_itr - 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_itr, q_vector->tx_itr); |
| |
| 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; |
| |
| /* save the algorithm value here, not the smoothed one */ |
| q_vector->eitr = new_itr; |
| /* do an exponential smoothing */ |
| new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100); |
| itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr); |
| ixgbevf_write_eitr(adapter, v_idx, itr_reg); |
| } |
| |
| return; |
| } |
| |
| static irqreturn_t ixgbevf_msix_mbx(int irq, void *data) |
| { |
| struct net_device *netdev = data; |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 eicr; |
| u32 msg; |
| |
| eicr = IXGBE_READ_REG(hw, IXGBE_VTEICS); |
| IXGBE_WRITE_REG(hw, IXGBE_VTEICR, eicr); |
| |
| if (!hw->mbx.ops.check_for_ack(hw)) { |
| /* |
| * checking for the ack clears the PFACK bit. Place |
| * it back in the v2p_mailbox cache so that anyone |
| * polling for an ack will not miss it. Also |
| * avoid the read below because the code to read |
| * the mailbox will also clear the ack bit. This was |
| * causing lost acks. Just cache the bit and exit |
| * the IRQ handler. |
| */ |
| hw->mbx.v2p_mailbox |= IXGBE_VFMAILBOX_PFACK; |
| goto out; |
| } |
| |
| /* Not an ack interrupt, go ahead and read the message */ |
| hw->mbx.ops.read(hw, &msg, 1); |
| |
| if ((msg & IXGBE_MBVFICR_VFREQ_MASK) == IXGBE_PF_CONTROL_MSG) |
| mod_timer(&adapter->watchdog_timer, |
| round_jiffies(jiffies + 1)); |
| |
| out: |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t ixgbevf_msix_clean_tx(int irq, void *data) |
| { |
| struct ixgbevf_q_vector *q_vector = data; |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| struct ixgbevf_ring *tx_ring; |
| 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++) { |
| tx_ring = &(adapter->tx_ring[r_idx]); |
| tx_ring->total_bytes = 0; |
| tx_ring->total_packets = 0; |
| ixgbevf_clean_tx_irq(adapter, tx_ring); |
| r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues, |
| r_idx + 1); |
| } |
| |
| if (adapter->itr_setting & 1) |
| ixgbevf_set_itr_msix(q_vector); |
| |
| 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 ixgbevf_msix_clean_rx(int irq, void *data) |
| { |
| struct ixgbevf_q_vector *q_vector = data; |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| struct ixgbe_hw *hw = &adapter->hw; |
| struct ixgbevf_ring *rx_ring; |
| int r_idx; |
| int i; |
| |
| 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]); |
| rx_ring->total_bytes = 0; |
| rx_ring->total_packets = 0; |
| r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues, |
| r_idx + 1); |
| } |
| |
| if (!q_vector->rxr_count) |
| return IRQ_HANDLED; |
| |
| r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); |
| rx_ring = &(adapter->rx_ring[r_idx]); |
| /* disable interrupts on this vector only */ |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, rx_ring->v_idx); |
| napi_schedule(&q_vector->napi); |
| |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t ixgbevf_msix_clean_many(int irq, void *data) |
| { |
| ixgbevf_msix_clean_rx(irq, data); |
| ixgbevf_msix_clean_tx(irq, data); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx, |
| int r_idx) |
| { |
| struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx]; |
| |
| set_bit(r_idx, q_vector->rxr_idx); |
| q_vector->rxr_count++; |
| a->rx_ring[r_idx].v_idx = 1 << v_idx; |
| } |
| |
| static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx, |
| int t_idx) |
| { |
| struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx]; |
| |
| set_bit(t_idx, q_vector->txr_idx); |
| q_vector->txr_count++; |
| a->tx_ring[t_idx].v_idx = 1 << v_idx; |
| } |
| |
| /** |
| * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors |
| * @adapter: board private structure to initialize |
| * |
| * 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 ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter) |
| { |
| int q_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; |
| |
| q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| |
| /* |
| * The ideal configuration... |
| * We have enough vectors to map one per queue. |
| */ |
| if (q_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 < q_vectors; i++) { |
| rqpv = DIV_ROUND_UP(rxr_remaining, q_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 < q_vectors; i++) { |
| tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i); |
| for (j = 0; j < tqpv; j++) { |
| map_vector_to_txq(adapter, i, txr_idx); |
| txr_idx++; |
| txr_remaining--; |
| } |
| } |
| |
| out: |
| return err; |
| } |
| |
| /** |
| * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts |
| * @adapter: board private structure |
| * |
| * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests |
| * interrupts from the kernel. |
| **/ |
| static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| irqreturn_t (*handler)(int, void *); |
| int i, vector, q_vectors, err; |
| int ri = 0, ti = 0; |
| |
| /* Decrement for Other and TCP Timer vectors */ |
| q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| |
| #define SET_HANDLER(_v) (((_v)->rxr_count && (_v)->txr_count) \ |
| ? &ixgbevf_msix_clean_many : \ |
| (_v)->rxr_count ? &ixgbevf_msix_clean_rx : \ |
| (_v)->txr_count ? &ixgbevf_msix_clean_tx : \ |
| NULL) |
| for (vector = 0; vector < q_vectors; vector++) { |
| handler = SET_HANDLER(adapter->q_vector[vector]); |
| |
| if (handler == &ixgbevf_msix_clean_rx) { |
| sprintf(adapter->name[vector], "%s-%s-%d", |
| netdev->name, "rx", ri++); |
| } else if (handler == &ixgbevf_msix_clean_tx) { |
| sprintf(adapter->name[vector], "%s-%s-%d", |
| netdev->name, "tx", ti++); |
| } else if (handler == &ixgbevf_msix_clean_many) { |
| sprintf(adapter->name[vector], "%s-%s-%d", |
| netdev->name, "TxRx", vector); |
| } else { |
| /* skip this unused q_vector */ |
| continue; |
| } |
| err = request_irq(adapter->msix_entries[vector].vector, |
| handler, 0, adapter->name[vector], |
| adapter->q_vector[vector]); |
| if (err) { |
| hw_dbg(&adapter->hw, |
| "request_irq failed for MSIX interrupt " |
| "Error: %d\n", err); |
| goto free_queue_irqs; |
| } |
| } |
| |
| sprintf(adapter->name[vector], "%s:mbx", netdev->name); |
| err = request_irq(adapter->msix_entries[vector].vector, |
| &ixgbevf_msix_mbx, 0, adapter->name[vector], netdev); |
| if (err) { |
| hw_dbg(&adapter->hw, |
| "request_irq for msix_mbx 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])); |
| pci_disable_msix(adapter->pdev); |
| kfree(adapter->msix_entries); |
| adapter->msix_entries = NULL; |
| return err; |
| } |
| |
| static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter) |
| { |
| int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| |
| for (i = 0; i < q_vectors; i++) { |
| struct ixgbevf_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; |
| q_vector->eitr = adapter->eitr_param; |
| } |
| } |
| |
| /** |
| * ixgbevf_request_irq - initialize interrupts |
| * @adapter: board private structure |
| * |
| * Attempts to configure interrupts using the best available |
| * capabilities of the hardware and kernel. |
| **/ |
| static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter) |
| { |
| int err = 0; |
| |
| err = ixgbevf_request_msix_irqs(adapter); |
| |
| if (err) |
| hw_dbg(&adapter->hw, |
| "request_irq failed, Error %d\n", err); |
| |
| return err; |
| } |
| |
| static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| 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]); |
| } |
| |
| ixgbevf_reset_q_vectors(adapter); |
| } |
| |
| /** |
| * ixgbevf_irq_disable - Mask off interrupt generation on the NIC |
| * @adapter: board private structure |
| **/ |
| static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter) |
| { |
| int i; |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0); |
| |
| IXGBE_WRITE_FLUSH(hw); |
| |
| for (i = 0; i < adapter->num_msix_vectors; i++) |
| synchronize_irq(adapter->msix_entries[i].vector); |
| } |
| |
| /** |
| * ixgbevf_irq_enable - Enable default interrupt generation settings |
| * @adapter: board private structure |
| **/ |
| static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter, |
| bool queues, bool flush) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 mask; |
| u64 qmask; |
| |
| mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE); |
| qmask = ~0; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask); |
| |
| if (queues) |
| ixgbevf_irq_enable_queues(adapter, qmask); |
| |
| if (flush) |
| IXGBE_WRITE_FLUSH(hw); |
| } |
| |
| /** |
| * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset |
| * @adapter: board private structure |
| * |
| * Configure the Tx unit of the MAC after a reset. |
| **/ |
| static void ixgbevf_configure_tx(struct ixgbevf_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++) { |
| struct ixgbevf_ring *ring = &adapter->tx_ring[i]; |
| j = ring->reg_idx; |
| tdba = ring->dma; |
| tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j), |
| (tdba & DMA_BIT_MASK(32))); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32)); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0); |
| adapter->tx_ring[i].head = IXGBE_VFTDH(j); |
| adapter->tx_ring[i].tail = IXGBE_VFTDT(j); |
| /* Disable Tx Head Writeback RO bit, since this hoses |
| * bookkeeping if things aren't delivered in order. |
| */ |
| txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j)); |
| txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN; |
| IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl); |
| } |
| } |
| |
| #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 |
| |
| static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index) |
| { |
| struct ixgbevf_ring *rx_ring; |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 srrctl; |
| |
| rx_ring = &adapter->rx_ring[index]; |
| |
| srrctl = IXGBE_SRRCTL_DROP_EN; |
| |
| if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { |
| u16 bufsz = IXGBEVF_RXBUFFER_2048; |
| /* grow the amount we can receive on large page machines */ |
| if (bufsz < (PAGE_SIZE / 2)) |
| bufsz = (PAGE_SIZE / 2); |
| /* cap the bufsz at our largest descriptor size */ |
| bufsz = min((u16)IXGBEVF_MAX_RXBUFFER, bufsz); |
| |
| srrctl |= bufsz >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; |
| srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; |
| srrctl |= ((IXGBEVF_RX_HDR_SIZE << |
| IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) & |
| IXGBE_SRRCTL_BSIZEHDR_MASK); |
| } else { |
| srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; |
| |
| if (rx_ring->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE) |
| srrctl |= IXGBEVF_RXBUFFER_2048 >> |
| IXGBE_SRRCTL_BSIZEPKT_SHIFT; |
| else |
| srrctl |= rx_ring->rx_buf_len >> |
| IXGBE_SRRCTL_BSIZEPKT_SHIFT; |
| } |
| IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl); |
| } |
| |
| /** |
| * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset |
| * @adapter: board private structure |
| * |
| * Configure the Rx unit of the MAC after a reset. |
| **/ |
| static void ixgbevf_configure_rx(struct ixgbevf_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; |
| int rx_buf_len; |
| |
| /* Decide whether to use packet split mode or not */ |
| if (netdev->mtu > ETH_DATA_LEN) { |
| if (adapter->flags & IXGBE_FLAG_RX_PS_CAPABLE) |
| adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED; |
| else |
| adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED; |
| } else { |
| if (adapter->flags & IXGBE_FLAG_RX_1BUF_CAPABLE) |
| 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) { |
| /* PSRTYPE must be initialized in 82599 */ |
| u32 psrtype = IXGBE_PSRTYPE_TCPHDR | |
| IXGBE_PSRTYPE_UDPHDR | |
| IXGBE_PSRTYPE_IPV4HDR | |
| IXGBE_PSRTYPE_IPV6HDR | |
| IXGBE_PSRTYPE_L2HDR; |
| IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype); |
| rx_buf_len = IXGBEVF_RX_HDR_SIZE; |
| } else { |
| IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0); |
| if (netdev->mtu <= ETH_DATA_LEN) |
| rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
| else |
| rx_buf_len = ALIGN(max_frame, 1024); |
| } |
| |
| rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc); |
| /* 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; |
| j = adapter->rx_ring[i].reg_idx; |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j), |
| (rdba & DMA_BIT_MASK(32))); |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32)); |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen); |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0); |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0); |
| adapter->rx_ring[i].head = IXGBE_VFRDH(j); |
| adapter->rx_ring[i].tail = IXGBE_VFRDT(j); |
| adapter->rx_ring[i].rx_buf_len = rx_buf_len; |
| |
| ixgbevf_configure_srrctl(adapter, j); |
| } |
| } |
| |
| static void ixgbevf_vlan_rx_register(struct net_device *netdev, |
| struct vlan_group *grp) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| int i, j; |
| u32 ctrl; |
| |
| adapter->vlgrp = grp; |
| |
| for (i = 0; i < adapter->num_rx_queues; i++) { |
| j = adapter->rx_ring[i].reg_idx; |
| ctrl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)); |
| ctrl |= IXGBE_RXDCTL_VME; |
| IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), ctrl); |
| } |
| } |
| |
| static void ixgbevf_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| struct net_device *v_netdev; |
| |
| /* add VID to filter table */ |
| if (hw->mac.ops.set_vfta) |
| hw->mac.ops.set_vfta(hw, vid, 0, true); |
| /* |
| * Copy feature flags from netdev to the vlan netdev for this vid. |
| * This allows things like TSO to bubble down to our vlan device. |
| */ |
| v_netdev = vlan_group_get_device(adapter->vlgrp, vid); |
| v_netdev->features |= adapter->netdev->features; |
| vlan_group_set_device(adapter->vlgrp, vid, v_netdev); |
| } |
| |
| static void ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| ixgbevf_irq_disable(adapter); |
| |
| vlan_group_set_device(adapter->vlgrp, vid, NULL); |
| |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| ixgbevf_irq_enable(adapter, true, true); |
| |
| /* remove VID from filter table */ |
| if (hw->mac.ops.set_vfta) |
| hw->mac.ops.set_vfta(hw, vid, 0, false); |
| } |
| |
| static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter) |
| { |
| ixgbevf_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; |
| ixgbevf_vlan_rx_add_vid(adapter->netdev, vid); |
| } |
| } |
| } |
| |
| /** |
| * ixgbevf_set_rx_mode - Multicast set |
| * @netdev: network interface device structure |
| * |
| * The set_rx_method 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 mode. |
| **/ |
| static void ixgbevf_set_rx_mode(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| /* reprogram multicast list */ |
| if (hw->mac.ops.update_mc_addr_list) |
| hw->mac.ops.update_mc_addr_list(hw, netdev); |
| } |
| |
| static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter) |
| { |
| int q_idx; |
| struct ixgbevf_q_vector *q_vector; |
| int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| |
| for (q_idx = 0; q_idx < q_vectors; q_idx++) { |
| struct napi_struct *napi; |
| q_vector = adapter->q_vector[q_idx]; |
| if (!q_vector->rxr_count) |
| continue; |
| napi = &q_vector->napi; |
| if (q_vector->rxr_count > 1) |
| napi->poll = &ixgbevf_clean_rxonly_many; |
| |
| napi_enable(napi); |
| } |
| } |
| |
| static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter) |
| { |
| int q_idx; |
| struct ixgbevf_q_vector *q_vector; |
| int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| |
| 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 ixgbevf_configure(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| int i; |
| |
| ixgbevf_set_rx_mode(netdev); |
| |
| ixgbevf_restore_vlan(adapter); |
| |
| ixgbevf_configure_tx(adapter); |
| ixgbevf_configure_rx(adapter); |
| for (i = 0; i < adapter->num_rx_queues; i++) { |
| struct ixgbevf_ring *ring = &adapter->rx_ring[i]; |
| ixgbevf_alloc_rx_buffers(adapter, ring, ring->count); |
| ring->next_to_use = ring->count - 1; |
| writel(ring->next_to_use, adapter->hw.hw_addr + ring->tail); |
| } |
| } |
| |
| #define IXGBE_MAX_RX_DESC_POLL 10 |
| static inline void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter, |
| int rxr) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| int j = adapter->rx_ring[rxr].reg_idx; |
| int k; |
| |
| for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) { |
| if (IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)) & IXGBE_RXDCTL_ENABLE) |
| break; |
| else |
| msleep(1); |
| } |
| if (k >= IXGBE_MAX_RX_DESC_POLL) { |
| hw_dbg(hw, "RXDCTL.ENABLE on Rx queue %d " |
| "not set within the polling period\n", rxr); |
| } |
| |
| ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr], |
| (adapter->rx_ring[rxr].count - 1)); |
| } |
| |
| static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter) |
| { |
| /* Only save pre-reset stats if there are some */ |
| if (adapter->stats.vfgprc || adapter->stats.vfgptc) { |
| adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc - |
| adapter->stats.base_vfgprc; |
| adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc - |
| adapter->stats.base_vfgptc; |
| adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc - |
| adapter->stats.base_vfgorc; |
| adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc - |
| adapter->stats.base_vfgotc; |
| adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc - |
| adapter->stats.base_vfmprc; |
| } |
| } |
| |
| static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC); |
| adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB); |
| adapter->stats.last_vfgorc |= |
| (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32); |
| adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC); |
| adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB); |
| adapter->stats.last_vfgotc |= |
| (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32); |
| adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC); |
| |
| adapter->stats.base_vfgprc = adapter->stats.last_vfgprc; |
| adapter->stats.base_vfgorc = adapter->stats.last_vfgorc; |
| adapter->stats.base_vfgptc = adapter->stats.last_vfgptc; |
| adapter->stats.base_vfgotc = adapter->stats.last_vfgotc; |
| adapter->stats.base_vfmprc = adapter->stats.last_vfmprc; |
| } |
| |
| static int ixgbevf_up_complete(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct ixgbe_hw *hw = &adapter->hw; |
| int i, j = 0; |
| int num_rx_rings = adapter->num_rx_queues; |
| u32 txdctl, rxdctl; |
| |
| for (i = 0; i < adapter->num_tx_queues; i++) { |
| j = adapter->tx_ring[i].reg_idx; |
| txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); |
| /* enable WTHRESH=8 descriptors, to encourage burst writeback */ |
| txdctl |= (8 << 16); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl); |
| } |
| |
| for (i = 0; i < adapter->num_tx_queues; i++) { |
| j = adapter->tx_ring[i].reg_idx; |
| txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); |
| txdctl |= IXGBE_TXDCTL_ENABLE; |
| IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl); |
| } |
| |
| for (i = 0; i < num_rx_rings; i++) { |
| j = adapter->rx_ring[i].reg_idx; |
| rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)); |
| rxdctl |= IXGBE_RXDCTL_ENABLE; |
| IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl); |
| ixgbevf_rx_desc_queue_enable(adapter, i); |
| } |
| |
| ixgbevf_configure_msix(adapter); |
| |
| if (hw->mac.ops.set_rar) { |
| if (is_valid_ether_addr(hw->mac.addr)) |
| hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0); |
| else |
| hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0); |
| } |
| |
| clear_bit(__IXGBEVF_DOWN, &adapter->state); |
| ixgbevf_napi_enable_all(adapter); |
| |
| /* enable transmits */ |
| netif_tx_start_all_queues(netdev); |
| |
| ixgbevf_save_reset_stats(adapter); |
| ixgbevf_init_last_counter_stats(adapter); |
| |
| /* bring the link up in the watchdog, this could race with our first |
| * link up interrupt but shouldn't be a problem */ |
| adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE; |
| adapter->link_check_timeout = jiffies; |
| mod_timer(&adapter->watchdog_timer, jiffies); |
| return 0; |
| } |
| |
| int ixgbevf_up(struct ixgbevf_adapter *adapter) |
| { |
| int err; |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| ixgbevf_configure(adapter); |
| |
| err = ixgbevf_up_complete(adapter); |
| |
| /* clear any pending interrupts, may auto mask */ |
| IXGBE_READ_REG(hw, IXGBE_VTEICR); |
| |
| ixgbevf_irq_enable(adapter, true, true); |
| |
| return err; |
| } |
| |
| /** |
| * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue |
| * @adapter: board private structure |
| * @rx_ring: ring to free buffers from |
| **/ |
| static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *rx_ring) |
| { |
| struct pci_dev *pdev = adapter->pdev; |
| unsigned long size; |
| unsigned int i; |
| |
| if (!rx_ring->rx_buffer_info) |
| return; |
| |
| /* Free all the Rx ring sk_buffs */ |
| for (i = 0; i < rx_ring->count; i++) { |
| struct ixgbevf_rx_buffer *rx_buffer_info; |
| |
| rx_buffer_info = &rx_ring->rx_buffer_info[i]; |
| if (rx_buffer_info->dma) { |
| dma_unmap_single(&pdev->dev, rx_buffer_info->dma, |
| rx_ring->rx_buf_len, |
| DMA_FROM_DEVICE); |
| rx_buffer_info->dma = 0; |
| } |
| if (rx_buffer_info->skb) { |
| struct sk_buff *skb = rx_buffer_info->skb; |
| rx_buffer_info->skb = NULL; |
| do { |
| struct sk_buff *this = skb; |
| skb = skb->prev; |
| dev_kfree_skb(this); |
| } while (skb); |
| } |
| if (!rx_buffer_info->page) |
| continue; |
| dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma, |
| PAGE_SIZE / 2, DMA_FROM_DEVICE); |
| rx_buffer_info->page_dma = 0; |
| put_page(rx_buffer_info->page); |
| rx_buffer_info->page = NULL; |
| rx_buffer_info->page_offset = 0; |
| } |
| |
| size = sizeof(struct ixgbevf_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; |
| |
| if (rx_ring->head) |
| writel(0, adapter->hw.hw_addr + rx_ring->head); |
| if (rx_ring->tail) |
| writel(0, adapter->hw.hw_addr + rx_ring->tail); |
| } |
| |
| /** |
| * ixgbevf_clean_tx_ring - Free Tx Buffers |
| * @adapter: board private structure |
| * @tx_ring: ring to be cleaned |
| **/ |
| static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *tx_ring) |
| { |
| struct ixgbevf_tx_buffer *tx_buffer_info; |
| unsigned long size; |
| unsigned int i; |
| |
| if (!tx_ring->tx_buffer_info) |
| return; |
| |
| /* Free all the Tx ring sk_buffs */ |
| |
| for (i = 0; i < tx_ring->count; i++) { |
| tx_buffer_info = &tx_ring->tx_buffer_info[i]; |
| ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info); |
| } |
| |
| size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count; |
| memset(tx_ring->tx_buffer_info, 0, size); |
| |
| memset(tx_ring->desc, 0, tx_ring->size); |
| |
| tx_ring->next_to_use = 0; |
| tx_ring->next_to_clean = 0; |
| |
| if (tx_ring->head) |
| writel(0, adapter->hw.hw_addr + tx_ring->head); |
| if (tx_ring->tail) |
| writel(0, adapter->hw.hw_addr + tx_ring->tail); |
| } |
| |
| /** |
| * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues |
| * @adapter: board private structure |
| **/ |
| static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter) |
| { |
| int i; |
| |
| for (i = 0; i < adapter->num_rx_queues; i++) |
| ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]); |
| } |
| |
| /** |
| * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues |
| * @adapter: board private structure |
| **/ |
| static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter) |
| { |
| int i; |
| |
| for (i = 0; i < adapter->num_tx_queues; i++) |
| ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]); |
| } |
| |
| void ixgbevf_down(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 txdctl; |
| int i, j; |
| |
| /* signal that we are down to the interrupt handler */ |
| set_bit(__IXGBEVF_DOWN, &adapter->state); |
| /* disable receives */ |
| |
| netif_tx_disable(netdev); |
| |
| msleep(10); |
| |
| netif_tx_stop_all_queues(netdev); |
| |
| ixgbevf_irq_disable(adapter); |
| |
| ixgbevf_napi_disable_all(adapter); |
| |
| del_timer_sync(&adapter->watchdog_timer); |
| /* can't call flush scheduled work here because it can deadlock |
| * if linkwatch_event tries to acquire the rtnl_lock which we are |
| * holding */ |
| while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK) |
| msleep(1); |
| |
| /* disable transmits in the hardware now that interrupts are off */ |
| for (i = 0; i < adapter->num_tx_queues; i++) { |
| j = adapter->tx_ring[i].reg_idx; |
| txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), |
| (txdctl & ~IXGBE_TXDCTL_ENABLE)); |
| } |
| |
| netif_carrier_off(netdev); |
| |
| if (!pci_channel_offline(adapter->pdev)) |
| ixgbevf_reset(adapter); |
| |
| ixgbevf_clean_all_tx_rings(adapter); |
| ixgbevf_clean_all_rx_rings(adapter); |
| } |
| |
| void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| WARN_ON(in_interrupt()); |
| |
| while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state)) |
| msleep(1); |
| |
| /* |
| * Check if PF is up before re-init. If not then skip until |
| * later when the PF is up and ready to service requests from |
| * the VF via mailbox. If the VF is up and running then the |
| * watchdog task will continue to schedule reset tasks until |
| * the PF is up and running. |
| */ |
| if (!hw->mac.ops.reset_hw(hw)) { |
| ixgbevf_down(adapter); |
| ixgbevf_up(adapter); |
| } |
| |
| clear_bit(__IXGBEVF_RESETTING, &adapter->state); |
| } |
| |
| void ixgbevf_reset(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| struct net_device *netdev = adapter->netdev; |
| |
| if (hw->mac.ops.reset_hw(hw)) |
| hw_dbg(hw, "PF still resetting\n"); |
| else |
| hw->mac.ops.init_hw(hw); |
| |
| if (is_valid_ether_addr(adapter->hw.mac.addr)) { |
| memcpy(netdev->dev_addr, adapter->hw.mac.addr, |
| netdev->addr_len); |
| memcpy(netdev->perm_addr, adapter->hw.mac.addr, |
| netdev->addr_len); |
| } |
| } |
| |
| static void ixgbevf_acquire_msix_vectors(struct ixgbevf_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.) |
| */ |
| 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. |
| */ |
| hw_dbg(&adapter->hw, |
| "Unable to allocate MSI-X interrupts\n"); |
| kfree(adapter->msix_entries); |
| adapter->msix_entries = NULL; |
| } else { |
| /* |
| * Adjust for only the vectors we'll use, which is minimum |
| * of max_msix_q_vectors + NON_Q_VECTORS, or the number of |
| * vectors we were allocated. |
| */ |
| adapter->num_msix_vectors = vectors; |
| } |
| } |
| |
| /* |
| * ixgbe_set_num_queues: Allocate queues for device, feature dependant |
| * @adapter: board private structure to initialize |
| * |
| * This is the top level queue allocation routine. The order here is very |
| * important, starting with the "most" number of features turned on at once, |
| * and ending with the smallest set of features. This way large combinations |
| * can be allocated if they're turned on, and smaller combinations are the |
| * fallthrough conditions. |
| * |
| **/ |
| static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter) |
| { |
| /* Start with base case */ |
| adapter->num_rx_queues = 1; |
| adapter->num_tx_queues = 1; |
| adapter->num_rx_pools = adapter->num_rx_queues; |
| adapter->num_rx_queues_per_pool = 1; |
| } |
| |
| /** |
| * ixgbevf_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 ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter) |
| { |
| int i; |
| |
| adapter->tx_ring = kcalloc(adapter->num_tx_queues, |
| sizeof(struct ixgbevf_ring), GFP_KERNEL); |
| if (!adapter->tx_ring) |
| goto err_tx_ring_allocation; |
| |
| adapter->rx_ring = kcalloc(adapter->num_rx_queues, |
| sizeof(struct ixgbevf_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 = adapter->tx_ring_count; |
| adapter->tx_ring[i].queue_index = i; |
| adapter->tx_ring[i].reg_idx = i; |
| } |
| |
| for (i = 0; i < adapter->num_rx_queues; i++) { |
| adapter->rx_ring[i].count = adapter->rx_ring_count; |
| adapter->rx_ring[i].queue_index = i; |
| adapter->rx_ring[i].reg_idx = i; |
| } |
| |
| return 0; |
| |
| err_rx_ring_allocation: |
| kfree(adapter->tx_ring); |
| err_tx_ring_allocation: |
| return -ENOMEM; |
| } |
| |
| /** |
| * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not 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 ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter) |
| { |
| int err = 0; |
| int vector, v_budget; |
| |
| /* |
| * 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; |
| |
| /* 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) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| for (vector = 0; vector < v_budget; vector++) |
| adapter->msix_entries[vector].entry = vector; |
| |
| ixgbevf_acquire_msix_vectors(adapter, v_budget); |
| |
| out: |
| return err; |
| } |
| |
| /** |
| * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors |
| * @adapter: board private structure to initialize |
| * |
| * We allocate one q_vector per queue interrupt. If allocation fails we |
| * return -ENOMEM. |
| **/ |
| static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter) |
| { |
| int q_idx, num_q_vectors; |
| struct ixgbevf_q_vector *q_vector; |
| int napi_vectors; |
| int (*poll)(struct napi_struct *, int); |
| |
| num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| napi_vectors = adapter->num_rx_queues; |
| poll = &ixgbevf_clean_rxonly; |
| |
| for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { |
| q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL); |
| if (!q_vector) |
| goto err_out; |
| q_vector->adapter = adapter; |
| q_vector->v_idx = q_idx; |
| q_vector->eitr = adapter->eitr_param; |
| if (q_idx < napi_vectors) |
| netif_napi_add(adapter->netdev, &q_vector->napi, |
| (*poll), 64); |
| adapter->q_vector[q_idx] = q_vector; |
| } |
| |
| return 0; |
| |
| err_out: |
| while (q_idx) { |
| q_idx--; |
| q_vector = adapter->q_vector[q_idx]; |
| netif_napi_del(&q_vector->napi); |
| kfree(q_vector); |
| adapter->q_vector[q_idx] = NULL; |
| } |
| return -ENOMEM; |
| } |
| |
| /** |
| * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors |
| * @adapter: board private structure to initialize |
| * |
| * This function frees the memory allocated to the q_vectors. In addition if |
| * NAPI is enabled it will delete any references to the NAPI struct prior |
| * to freeing the q_vector. |
| **/ |
| static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter) |
| { |
| int q_idx, num_q_vectors; |
| int napi_vectors; |
| |
| num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| napi_vectors = adapter->num_rx_queues; |
| |
| for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { |
| struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx]; |
| |
| adapter->q_vector[q_idx] = NULL; |
| if (q_idx < napi_vectors) |
| netif_napi_del(&q_vector->napi); |
| kfree(q_vector); |
| } |
| } |
| |
| /** |
| * ixgbevf_reset_interrupt_capability - Reset MSIX setup |
| * @adapter: board private structure |
| * |
| **/ |
| static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter) |
| { |
| pci_disable_msix(adapter->pdev); |
| kfree(adapter->msix_entries); |
| adapter->msix_entries = NULL; |
| |
| return; |
| } |
| |
| /** |
| * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init |
| * @adapter: board private structure to initialize |
| * |
| **/ |
| static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter) |
| { |
| int err; |
| |
| /* Number of supported queues */ |
| ixgbevf_set_num_queues(adapter); |
| |
| err = ixgbevf_set_interrupt_capability(adapter); |
| if (err) { |
| hw_dbg(&adapter->hw, |
| "Unable to setup interrupt capabilities\n"); |
| goto err_set_interrupt; |
| } |
| |
| err = ixgbevf_alloc_q_vectors(adapter); |
| if (err) { |
| hw_dbg(&adapter->hw, "Unable to allocate memory for queue " |
| "vectors\n"); |
| goto err_alloc_q_vectors; |
| } |
| |
| err = ixgbevf_alloc_queues(adapter); |
| if (err) { |
| printk(KERN_ERR "Unable to allocate memory for queues\n"); |
| goto err_alloc_queues; |
| } |
| |
| hw_dbg(&adapter->hw, "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(__IXGBEVF_DOWN, &adapter->state); |
| |
| return 0; |
| err_alloc_queues: |
| ixgbevf_free_q_vectors(adapter); |
| err_alloc_q_vectors: |
| ixgbevf_reset_interrupt_capability(adapter); |
| err_set_interrupt: |
| return err; |
| } |
| |
| /** |
| * ixgbevf_sw_init - Initialize general software structures |
| * (struct ixgbevf_adapter) |
| * @adapter: board private structure to initialize |
| * |
| * ixgbevf_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 ixgbevf_sw_init(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| struct pci_dev *pdev = adapter->pdev; |
| int err; |
| |
| /* PCI config space info */ |
| |
| hw->vendor_id = pdev->vendor; |
| hw->device_id = pdev->device; |
| pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id); |
| hw->subsystem_vendor_id = pdev->subsystem_vendor; |
| hw->subsystem_device_id = pdev->subsystem_device; |
| |
| hw->mbx.ops.init_params(hw); |
| hw->mac.max_tx_queues = MAX_TX_QUEUES; |
| hw->mac.max_rx_queues = MAX_RX_QUEUES; |
| err = hw->mac.ops.reset_hw(hw); |
| if (err) { |
| dev_info(&pdev->dev, |
| "PF still in reset state, assigning new address\n"); |
| random_ether_addr(hw->mac.addr); |
| } else { |
| err = hw->mac.ops.init_hw(hw); |
| if (err) { |
| printk(KERN_ERR "init_shared_code failed: %d\n", err); |
| goto out; |
| } |
| } |
| |
| /* Enable dynamic interrupt throttling rates */ |
| adapter->eitr_param = 20000; |
| adapter->itr_setting = 1; |
| |
| /* set defaults for eitr in MegaBytes */ |
| adapter->eitr_low = 10; |
| adapter->eitr_high = 20; |
| |
| /* set default ring sizes */ |
| adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD; |
| adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD; |
| |
| /* enable rx csum by default */ |
| adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED; |
| |
| set_bit(__IXGBEVF_DOWN, &adapter->state); |
| |
| out: |
| return err; |
| } |
| |
| #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \ |
| { \ |
| u32 current_counter = IXGBE_READ_REG(hw, reg); \ |
| if (current_counter < last_counter) \ |
| counter += 0x100000000LL; \ |
| last_counter = current_counter; \ |
| counter &= 0xFFFFFFFF00000000LL; \ |
| counter |= current_counter; \ |
| } |
| |
| #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \ |
| { \ |
| u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \ |
| u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \ |
| u64 current_counter = (current_counter_msb << 32) | \ |
| current_counter_lsb; \ |
| if (current_counter < last_counter) \ |
| counter += 0x1000000000LL; \ |
| last_counter = current_counter; \ |
| counter &= 0xFFFFFFF000000000LL; \ |
| counter |= current_counter; \ |
| } |
| /** |
| * ixgbevf_update_stats - Update the board statistics counters. |
| * @adapter: board private structure |
| **/ |
| void ixgbevf_update_stats(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc, |
| adapter->stats.vfgprc); |
| UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc, |
| adapter->stats.vfgptc); |
| UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB, |
| adapter->stats.last_vfgorc, |
| adapter->stats.vfgorc); |
| UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB, |
| adapter->stats.last_vfgotc, |
| adapter->stats.vfgotc); |
| UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc, |
| adapter->stats.vfmprc); |
| |
| /* Fill out the OS statistics structure */ |
| adapter->net_stats.multicast = adapter->stats.vfmprc - |
| adapter->stats.base_vfmprc; |
| } |
| |
| /** |
| * ixgbevf_watchdog - Timer Call-back |
| * @data: pointer to adapter cast into an unsigned long |
| **/ |
| static void ixgbevf_watchdog(unsigned long data) |
| { |
| struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data; |
| struct ixgbe_hw *hw = &adapter->hw; |
| u64 eics = 0; |
| int i; |
| |
| /* |
| * Do the watchdog outside of interrupt context due to the lovely |
| * delays that some of the newer hardware requires |
| */ |
| |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| goto watchdog_short_circuit; |
| |
| /* get one bit for every active tx/rx interrupt vector */ |
| for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) { |
| struct ixgbevf_q_vector *qv = adapter->q_vector[i]; |
| if (qv->rxr_count || qv->txr_count) |
| eics |= (1 << i); |
| } |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VTEICS, (u32)eics); |
| |
| watchdog_short_circuit: |
| schedule_work(&adapter->watchdog_task); |
| } |
| |
| /** |
| * ixgbevf_tx_timeout - Respond to a Tx Hang |
| * @netdev: network interface device structure |
| **/ |
| static void ixgbevf_tx_timeout(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| |
| /* Do the reset outside of interrupt context */ |
| schedule_work(&adapter->reset_task); |
| } |
| |
| static void ixgbevf_reset_task(struct work_struct *work) |
| { |
| struct ixgbevf_adapter *adapter; |
| adapter = container_of(work, struct ixgbevf_adapter, reset_task); |
| |
| /* If we're already down or resetting, just bail */ |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state) || |
| test_bit(__IXGBEVF_RESETTING, &adapter->state)) |
| return; |
| |
| adapter->tx_timeout_count++; |
| |
| ixgbevf_reinit_locked(adapter); |
| } |
| |
| /** |
| * ixgbevf_watchdog_task - worker thread to bring link up |
| * @work: pointer to work_struct containing our data |
| **/ |
| static void ixgbevf_watchdog_task(struct work_struct *work) |
| { |
| struct ixgbevf_adapter *adapter = container_of(work, |
| struct ixgbevf_adapter, |
| watchdog_task); |
| struct net_device *netdev = adapter->netdev; |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 link_speed = adapter->link_speed; |
| bool link_up = adapter->link_up; |
| |
| adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK; |
| |
| /* |
| * Always check the link on the watchdog because we have |
| * no LSC interrupt |
| */ |
| if (hw->mac.ops.check_link) { |
| if ((hw->mac.ops.check_link(hw, &link_speed, |
| &link_up, false)) != 0) { |
| adapter->link_up = link_up; |
| adapter->link_speed = link_speed; |
| netif_carrier_off(netdev); |
| netif_tx_stop_all_queues(netdev); |
| schedule_work(&adapter->reset_task); |
| goto pf_has_reset; |
| } |
| } else { |
| /* always assume link is up, if no check link |
| * function */ |
| link_speed = IXGBE_LINK_SPEED_10GB_FULL; |
| link_up = true; |
| } |
| adapter->link_up = link_up; |
| adapter->link_speed = link_speed; |
| |
| if (link_up) { |
| if (!netif_carrier_ok(netdev)) { |
| hw_dbg(&adapter->hw, "NIC Link is Up, %u Gbps\n", |
| (link_speed == IXGBE_LINK_SPEED_10GB_FULL) ? |
| 10 : 1); |
| netif_carrier_on(netdev); |
| netif_tx_wake_all_queues(netdev); |
| } else { |
| /* Force detection of hung controller */ |
| adapter->detect_tx_hung = true; |
| } |
| } else { |
| adapter->link_up = false; |
| adapter->link_speed = 0; |
| if (netif_carrier_ok(netdev)) { |
| hw_dbg(&adapter->hw, "NIC Link is Down\n"); |
| netif_carrier_off(netdev); |
| netif_tx_stop_all_queues(netdev); |
| } |
| } |
| |
| ixgbevf_update_stats(adapter); |
| |
| pf_has_reset: |
| /* Force detection of hung controller every watchdog period */ |
| adapter->detect_tx_hung = true; |
| |
| /* Reset the timer */ |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| mod_timer(&adapter->watchdog_timer, |
| round_jiffies(jiffies + (2 * HZ))); |
| |
| adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK; |
| } |
| |
| /** |
| * ixgbevf_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 |
| **/ |
| void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *tx_ring) |
| { |
| struct pci_dev *pdev = adapter->pdev; |
| |
| ixgbevf_clean_tx_ring(adapter, tx_ring); |
| |
| vfree(tx_ring->tx_buffer_info); |
| tx_ring->tx_buffer_info = NULL; |
| |
| dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, |
| tx_ring->dma); |
| |
| tx_ring->desc = NULL; |
| } |
| |
| /** |
| * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues |
| * @adapter: board private structure |
| * |
| * Free all transmit software resources |
| **/ |
| static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter) |
| { |
| int i; |
| |
| for (i = 0; i < adapter->num_tx_queues; i++) |
| if (adapter->tx_ring[i].desc) |
| ixgbevf_free_tx_resources(adapter, |
| &adapter->tx_ring[i]); |
| |
| } |
| |
| /** |
| * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors) |
| * @adapter: board private structure |
| * @tx_ring: tx descriptor ring (for a specific queue) to setup |
| * |
| * Return 0 on success, negative on failure |
| **/ |
| int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *tx_ring) |
| { |
| struct pci_dev *pdev = adapter->pdev; |
| int size; |
| |
| size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count; |
| tx_ring->tx_buffer_info = vmalloc(size); |
| if (!tx_ring->tx_buffer_info) |
| goto err; |
| memset(tx_ring->tx_buffer_info, 0, size); |
| |
| /* round up to nearest 4K */ |
| tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc); |
| tx_ring->size = ALIGN(tx_ring->size, 4096); |
| |
| tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size, |
| &tx_ring->dma, GFP_KERNEL); |
| if (!tx_ring->desc) |
| goto err; |
| |
| tx_ring->next_to_use = 0; |
| tx_ring->next_to_clean = 0; |
| tx_ring->work_limit = tx_ring->count; |
| return 0; |
| |
| err: |
| vfree(tx_ring->tx_buffer_info); |
| tx_ring->tx_buffer_info = NULL; |
| hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit " |
| "descriptor ring\n"); |
| return -ENOMEM; |
| } |
| |
| /** |
| * ixgbevf_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 ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter) |
| { |
| int i, err = 0; |
| |
| for (i = 0; i < adapter->num_tx_queues; i++) { |
| err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]); |
| if (!err) |
| continue; |
| hw_dbg(&adapter->hw, |
| "Allocation for Tx Queue %u failed\n", i); |
| break; |
| } |
| |
| return err; |
| } |
| |
| /** |
| * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors) |
| * @adapter: board private structure |
| * @rx_ring: rx descriptor ring (for a specific queue) to setup |
| * |
| * Returns 0 on success, negative on failure |
| **/ |
| int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *rx_ring) |
| { |
| struct pci_dev *pdev = adapter->pdev; |
| int size; |
| |
| size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count; |
| rx_ring->rx_buffer_info = vmalloc(size); |
| if (!rx_ring->rx_buffer_info) { |
| hw_dbg(&adapter->hw, |
| "Unable to vmalloc buffer memory for " |
| "the receive descriptor ring\n"); |
| goto alloc_failed; |
| } |
| memset(rx_ring->rx_buffer_info, 0, size); |
| |
| /* Round up to nearest 4K */ |
| rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc); |
| rx_ring->size = ALIGN(rx_ring->size, 4096); |
| |
| rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size, |
| &rx_ring->dma, GFP_KERNEL); |
| |
| if (!rx_ring->desc) { |
| hw_dbg(&adapter->hw, |
| "Unable to allocate memory for " |
| "the receive descriptor ring\n"); |
| vfree(rx_ring->rx_buffer_info); |
| rx_ring->rx_buffer_info = NULL; |
| goto alloc_failed; |
| } |
| |
| rx_ring->next_to_clean = 0; |
| rx_ring->next_to_use = 0; |
| |
| return 0; |
| alloc_failed: |
| return -ENOMEM; |
| } |
| |
| /** |
| * ixgbevf_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 ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter) |
| { |
| int i, err = 0; |
| |
| for (i = 0; i < adapter->num_rx_queues; i++) { |
| err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]); |
| if (!err) |
| continue; |
| hw_dbg(&adapter->hw, |
| "Allocation for Rx Queue %u failed\n", i); |
| break; |
| } |
| return err; |
| } |
| |
| /** |
| * ixgbevf_free_rx_resources - Free Rx Resources |
| * @adapter: board private structure |
| * @rx_ring: ring to clean the resources from |
| * |
| * Free all receive software resources |
| **/ |
| void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *rx_ring) |
| { |
| struct pci_dev *pdev = adapter->pdev; |
| |
| ixgbevf_clean_rx_ring(adapter, rx_ring); |
| |
| vfree(rx_ring->rx_buffer_info); |
| rx_ring->rx_buffer_info = NULL; |
| |
| dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, |
| rx_ring->dma); |
| |
| rx_ring->desc = NULL; |
| } |
| |
| /** |
| * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues |
| * @adapter: board private structure |
| * |
| * Free all receive software resources |
| **/ |
| static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter) |
| { |
| int i; |
| |
| for (i = 0; i < adapter->num_rx_queues; i++) |
| if (adapter->rx_ring[i].desc) |
| ixgbevf_free_rx_resources(adapter, |
| &adapter->rx_ring[i]); |
| } |
| |
| /** |
| * ixgbevf_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 ixgbevf_open(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| int err; |
| |
| /* disallow open during test */ |
| if (test_bit(__IXGBEVF_TESTING, &adapter->state)) |
| return -EBUSY; |
| |
| if (hw->adapter_stopped) { |
| ixgbevf_reset(adapter); |
| /* if adapter is still stopped then PF isn't up and |
| * the vf can't start. */ |
| if (hw->adapter_stopped) { |
| err = IXGBE_ERR_MBX; |
| printk(KERN_ERR "Unable to start - perhaps the PF" |
| " Driver isn't up yet\n"); |
| goto err_setup_reset; |
| } |
| } |
| |
| /* allocate transmit descriptors */ |
| err = ixgbevf_setup_all_tx_resources(adapter); |
| if (err) |
| goto err_setup_tx; |
| |
| /* allocate receive descriptors */ |
| err = ixgbevf_setup_all_rx_resources(adapter); |
| if (err) |
| goto err_setup_rx; |
| |
| ixgbevf_configure(adapter); |
| |
| /* |
| * Map the Tx/Rx rings to the vectors we were allotted. |
| * if request_irq will be called in this function map_rings |
| * must be called *before* up_complete |
| */ |
| ixgbevf_map_rings_to_vectors(adapter); |
| |
| err = ixgbevf_up_complete(adapter); |
| if (err) |
| goto err_up; |
| |
| /* clear any pending interrupts, may auto mask */ |
| IXGBE_READ_REG(hw, IXGBE_VTEICR); |
| err = ixgbevf_request_irq(adapter); |
| if (err) |
| goto err_req_irq; |
| |
| ixgbevf_irq_enable(adapter, true, true); |
| |
| return 0; |
| |
| err_req_irq: |
| ixgbevf_down(adapter); |
| err_up: |
| ixgbevf_free_irq(adapter); |
| err_setup_rx: |
| ixgbevf_free_all_rx_resources(adapter); |
| err_setup_tx: |
| ixgbevf_free_all_tx_resources(adapter); |
| ixgbevf_reset(adapter); |
| |
| err_setup_reset: |
| |
| return err; |
| } |
| |
| /** |
| * ixgbevf_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 ixgbevf_close(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| |
| ixgbevf_down(adapter); |
| ixgbevf_free_irq(adapter); |
| |
| ixgbevf_free_all_tx_resources(adapter); |
| ixgbevf_free_all_rx_resources(adapter); |
| |
| return 0; |
| } |
| |
| static int ixgbevf_tso(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_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 ixgbevf_tx_buffer *tx_buffer_info; |
| u32 vlan_macip_lens = 0, type_tucmd_mlhl; |
| u32 mss_l4len_idx, 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_is_gso_v6(skb)) { |
| 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); |
| /* use index 1 for TSO */ |
| mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_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 ixgbevf_tx_csum(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *tx_ring, |
| struct sk_buff *skb, u32 tx_flags) |
| { |
| struct ixgbe_adv_tx_context_desc *context_desc; |
| unsigned int i; |
| struct ixgbevf_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())) { |
| printk(KERN_WARNING |
| "partial checksum but " |
| "proto=%x!\n", |
| skb->protocol); |
| } |
| break; |
| } |
| } |
| |
| context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl); |
| /* use index zero for tx checksum offload */ |
| 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 ixgbevf_tx_map(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *tx_ring, |
| struct sk_buff *skb, u32 tx_flags, |
| unsigned int first) |
| { |
| struct pci_dev *pdev = adapter->pdev; |
| struct ixgbevf_tx_buffer *tx_buffer_info; |
| unsigned int len; |
| unsigned int total = skb->len; |
| unsigned int offset = 0, size, count = 0; |
| unsigned int nr_frags = skb_shinfo(skb)->nr_frags; |
| unsigned int f; |
| int i; |
| |
| i = tx_ring->next_to_use; |
| |
| len = min(skb_headlen(skb), total); |
| while (len) { |
| tx_buffer_info = &tx_ring->tx_buffer_info[i]; |
| size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD); |
| |
| tx_buffer_info->length = size; |
| tx_buffer_info->mapped_as_page = false; |
| tx_buffer_info->dma = dma_map_single(&adapter->pdev->dev, |
| skb->data + offset, |
| size, DMA_TO_DEVICE); |
| if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma)) |
| goto dma_error; |
| tx_buffer_info->time_stamp = jiffies; |
| tx_buffer_info->next_to_watch = i; |
| |
| len -= size; |
| total -= 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 = min((unsigned int)frag->size, total); |
| offset = frag->page_offset; |
| |
| while (len) { |
| tx_buffer_info = &tx_ring->tx_buffer_info[i]; |
| size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD); |
| |
| tx_buffer_info->length = size; |
| tx_buffer_info->dma = dma_map_page(&adapter->pdev->dev, |
| frag->page, |
| offset, |
| size, |
| DMA_TO_DEVICE); |
| tx_buffer_info->mapped_as_page = true; |
| if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma)) |
| goto dma_error; |
| tx_buffer_info->time_stamp = jiffies; |
| tx_buffer_info->next_to_watch = i; |
| |
| len -= size; |
| total -= size; |
| offset += size; |
| count++; |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| } |
| if (total == 0) |
| break; |
| } |
| |
| 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; |
| |
| dma_error: |
| dev_err(&pdev->dev, "TX DMA map failed\n"); |
| |
| /* clear timestamp and dma mappings for failed tx_buffer_info map */ |
| tx_buffer_info->dma = 0; |
| tx_buffer_info->time_stamp = 0; |
| tx_buffer_info->next_to_watch = 0; |
| count--; |
| |
| /* clear timestamp and dma mappings for remaining portion of packet */ |
| while (count >= 0) { |
| count--; |
| i--; |
| if (i < 0) |
| i += tx_ring->count; |
| tx_buffer_info = &tx_ring->tx_buffer_info[i]; |
| ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info); |
| } |
| |
| return count; |
| } |
| |
| static void ixgbevf_tx_queue(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *tx_ring, int tx_flags, |
| int count, u32 paylen, u8 hdr_len) |
| { |
| union ixgbe_adv_tx_desc *tx_desc = NULL; |
| struct ixgbevf_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; |
| |
| /* use index 1 context for tso */ |
| olinfo_status |= (1 << IXGBE_ADVTXD_IDX_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 __ixgbevf_maybe_stop_tx(struct net_device *netdev, |
| struct ixgbevf_ring *tx_ring, int size) |
| { |
| struct ixgbevf_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_start_subqueue(netdev, tx_ring->queue_index); |
| ++adapter->restart_queue; |
| return 0; |
| } |
| |
| static int ixgbevf_maybe_stop_tx(struct net_device *netdev, |
| struct ixgbevf_ring *tx_ring, int size) |
| { |
| if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size)) |
| return 0; |
| return __ixgbevf_maybe_stop_tx(netdev, tx_ring, size); |
| } |
| |
| static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbevf_ring *tx_ring; |
| unsigned int first; |
| unsigned int tx_flags = 0; |
| u8 hdr_len = 0; |
| int r_idx = 0, tso; |
| int count = 0; |
| |
| unsigned int f; |
| |
| tx_ring = &adapter->tx_ring[r_idx]; |
| |
| if (adapter->vlgrp && vlan_tx_tag_present(skb)) { |
| tx_flags |= vlan_tx_tag_get(skb); |
| tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT; |
| tx_flags |= IXGBE_TX_FLAGS_VLAN; |
| } |
| |
| /* four things can cause us to need a context descriptor */ |
| if (skb_is_gso(skb) || |
| (skb->ip_summed == CHECKSUM_PARTIAL) || |
| (tx_flags & IXGBE_TX_FLAGS_VLAN)) |
| count++; |
| |
| count += TXD_USE_COUNT(skb_headlen(skb)); |
| for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) |
| count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); |
| |
| if (ixgbevf_maybe_stop_tx(netdev, tx_ring, count)) { |
| adapter->tx_busy++; |
| return NETDEV_TX_BUSY; |
| } |
| |
| first = tx_ring->next_to_use; |
| |
| if (skb->protocol == htons(ETH_P_IP)) |
| tx_flags |= IXGBE_TX_FLAGS_IPV4; |
| tso = ixgbevf_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 (ixgbevf_tx_csum(adapter, tx_ring, skb, tx_flags) && |
| (skb->ip_summed == CHECKSUM_PARTIAL)) |
| tx_flags |= IXGBE_TX_FLAGS_CSUM; |
| |
| ixgbevf_tx_queue(adapter, tx_ring, tx_flags, |
| ixgbevf_tx_map(adapter, tx_ring, skb, tx_flags, first), |
| skb->len, hdr_len); |
| |
| netdev->trans_start = jiffies; |
| |
| ixgbevf_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| /** |
| * ixgbevf_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 *ixgbevf_get_stats(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| |
| /* only return the current stats */ |
| return &adapter->net_stats; |
| } |
| |
| /** |
| * ixgbevf_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 ixgbevf_set_mac(struct net_device *netdev, void *p) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| 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(hw->mac.addr, addr->sa_data, netdev->addr_len); |
| |
| if (hw->mac.ops.set_rar) |
| hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0); |
| |
| return 0; |
| } |
| |
| /** |
| * ixgbevf_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 ixgbevf_change_mtu(struct net_device *netdev, int new_mtu) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; |
| |
| /* MTU < 68 is an error and causes problems on some kernels */ |
| if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE)) |
| return -EINVAL; |
| |
| hw_dbg(&adapter->hw, "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)) |
| ixgbevf_reinit_locked(adapter); |
| |
| return 0; |
| } |
| |
| static void ixgbevf_shutdown(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| |
| netif_device_detach(netdev); |
| |
| if (netif_running(netdev)) { |
| ixgbevf_down(adapter); |
| ixgbevf_free_irq(adapter); |
| ixgbevf_free_all_tx_resources(adapter); |
| ixgbevf_free_all_rx_resources(adapter); |
| } |
| |
| #ifdef CONFIG_PM |
| pci_save_state(pdev); |
| #endif |
| |
| pci_disable_device(pdev); |
| } |
| |
| static const struct net_device_ops ixgbe_netdev_ops = { |
| .ndo_open = &ixgbevf_open, |
| .ndo_stop = &ixgbevf_close, |
| .ndo_start_xmit = &ixgbevf_xmit_frame, |
| .ndo_get_stats = &ixgbevf_get_stats, |
| .ndo_set_rx_mode = &ixgbevf_set_rx_mode, |
| .ndo_set_multicast_list = &ixgbevf_set_rx_mode, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = &ixgbevf_set_mac, |
| .ndo_change_mtu = &ixgbevf_change_mtu, |
| .ndo_tx_timeout = &ixgbevf_tx_timeout, |
| .ndo_vlan_rx_register = &ixgbevf_vlan_rx_register, |
| .ndo_vlan_rx_add_vid = &ixgbevf_vlan_rx_add_vid, |
| .ndo_vlan_rx_kill_vid = &ixgbevf_vlan_rx_kill_vid, |
| }; |
| |
| static void ixgbevf_assign_netdev_ops(struct net_device *dev) |
| { |
| struct ixgbevf_adapter *adapter; |
| adapter = netdev_priv(dev); |
| dev->netdev_ops = &ixgbe_netdev_ops; |
| ixgbevf_set_ethtool_ops(dev); |
| dev->watchdog_timeo = 5 * HZ; |
| } |
| |
| /** |
| * ixgbevf_probe - Device Initialization Routine |
| * @pdev: PCI device information struct |
| * @ent: entry in ixgbevf_pci_tbl |
| * |
| * Returns 0 on success, negative on failure |
| * |
| * ixgbevf_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 ixgbevf_probe(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| struct net_device *netdev; |
| struct ixgbevf_adapter *adapter = NULL; |
| struct ixgbe_hw *hw = NULL; |
| const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data]; |
| static int cards_found; |
| int err, pci_using_dac; |
| |
| err = pci_enable_device(pdev); |
| if (err) |
| return err; |
| |
| if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) && |
| !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { |
| pci_using_dac = 1; |
| } else { |
| err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
| if (err) { |
| err = dma_set_coherent_mask(&pdev->dev, |
| DMA_BIT_MASK(32)); |
| if (err) { |
| dev_err(&pdev->dev, "No usable DMA " |
| "configuration, aborting\n"); |
| goto err_dma; |
| } |
| } |
| pci_using_dac = 0; |
| } |
| |
| err = pci_request_regions(pdev, ixgbevf_driver_name); |
| if (err) { |
| dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err); |
| goto err_pci_reg; |
| } |
| |
| pci_set_master(pdev); |
| |
| #ifdef HAVE_TX_MQ |
| netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter), |
| MAX_TX_QUEUES); |
| #else |
| netdev = alloc_etherdev(sizeof(struct ixgbevf_adapter)); |
| #endif |
| 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; |
| |
| /* |
| * call save state here in standalone driver because it relies on |
| * adapter struct to exist, and needs to call netdev_priv |
| */ |
| pci_save_state(pdev); |
| |
| hw->hw_addr = ioremap(pci_resource_start(pdev, 0), |
| pci_resource_len(pdev, 0)); |
| if (!hw->hw_addr) { |
| err = -EIO; |
| goto err_ioremap; |
| } |
| |
| ixgbevf_assign_netdev_ops(netdev); |
| |
| adapter->bd_number = cards_found; |
| |
| /* Setup hw api */ |
| memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops)); |
| hw->mac.type = ii->mac; |
| |
| memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops, |
| sizeof(struct ixgbe_mac_operations)); |
| |
| adapter->flags &= ~IXGBE_FLAG_RX_PS_CAPABLE; |
| adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED; |
| adapter->flags |= IXGBE_FLAG_RX_1BUF_CAPABLE; |
| |
| /* setup the private structure */ |
| err = ixgbevf_sw_init(adapter); |
| |
| #ifdef MAX_SKB_FRAGS |
| netdev->features = NETIF_F_SG | |
| NETIF_F_IP_CSUM | |
| NETIF_F_HW_VLAN_TX | |
| NETIF_F_HW_VLAN_RX | |
| NETIF_F_HW_VLAN_FILTER; |
| |
| netdev->features |= NETIF_F_IPV6_CSUM; |
| 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_IP_CSUM; |
| netdev->vlan_features |= NETIF_F_SG; |
| |
| if (pci_using_dac) |
| netdev->features |= NETIF_F_HIGHDMA; |
| |
| #endif /* MAX_SKB_FRAGS */ |
| |
| /* The HW MAC address was set and/or determined in sw_init */ |
| memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); |
| memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len); |
| |
| if (!is_valid_ether_addr(netdev->dev_addr)) { |
| printk(KERN_ERR "invalid MAC address\n"); |
| err = -EIO; |
| goto err_sw_init; |
| } |
| |
| init_timer(&adapter->watchdog_timer); |
| adapter->watchdog_timer.function = &ixgbevf_watchdog; |
| adapter->watchdog_timer.data = (unsigned long)adapter; |
| |
| INIT_WORK(&adapter->reset_task, ixgbevf_reset_task); |
| INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task); |
| |
| err = ixgbevf_init_interrupt_scheme(adapter); |
| if (err) |
| goto err_sw_init; |
| |
| /* pick up the PCI bus settings for reporting later */ |
| if (hw->mac.ops.get_bus_info) |
| hw->mac.ops.get_bus_info(hw); |
| |
| |
| netif_carrier_off(netdev); |
| netif_tx_stop_all_queues(netdev); |
| |
| strcpy(netdev->name, "eth%d"); |
| |
| err = register_netdev(netdev); |
| if (err) |
| goto err_register; |
| |
| adapter->netdev_registered = true; |
| |
| ixgbevf_init_last_counter_stats(adapter); |
| |
| /* print the MAC address */ |
| hw_dbg(hw, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", |
| netdev->dev_addr[0], |
| netdev->dev_addr[1], |
| netdev->dev_addr[2], |
| netdev->dev_addr[3], |
| netdev->dev_addr[4], |
| netdev->dev_addr[5]); |
| |
| hw_dbg(hw, "MAC: %d\n", hw->mac.type); |
| |
| hw_dbg(hw, "LRO is disabled\n"); |
| |
| hw_dbg(hw, "Intel(R) 82599 Virtual Function\n"); |
| cards_found++; |
| return 0; |
| |
| err_register: |
| err_sw_init: |
| ixgbevf_reset_interrupt_capability(adapter); |
| 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; |
| } |
| |
| /** |
| * ixgbevf_remove - Device Removal Routine |
| * @pdev: PCI device information struct |
| * |
| * ixgbevf_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 ixgbevf_remove(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| |
| set_bit(__IXGBEVF_DOWN, &adapter->state); |
| |
| del_timer_sync(&adapter->watchdog_timer); |
| |
| cancel_work_sync(&adapter->watchdog_task); |
| |
| flush_scheduled_work(); |
| |
| if (adapter->netdev_registered) { |
| unregister_netdev(netdev); |
| adapter->netdev_registered = false; |
| } |
| |
| ixgbevf_reset_interrupt_capability(adapter); |
| |
| iounmap(adapter->hw.hw_addr); |
| pci_release_regions(pdev); |
| |
| hw_dbg(&adapter->hw, "Remove complete\n"); |
| |
| kfree(adapter->tx_ring); |
| kfree(adapter->rx_ring); |
| |
| free_netdev(netdev); |
| |
| pci_disable_device(pdev); |
| } |
| |
| static struct pci_driver ixgbevf_driver = { |
| .name = ixgbevf_driver_name, |
| .id_table = ixgbevf_pci_tbl, |
| .probe = ixgbevf_probe, |
| .remove = __devexit_p(ixgbevf_remove), |
| .shutdown = ixgbevf_shutdown, |
| }; |
| |
| /** |
| * 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 ixgbevf_init_module(void) |
| { |
| int ret; |
| printk(KERN_INFO "ixgbevf: %s - version %s\n", ixgbevf_driver_string, |
| ixgbevf_driver_version); |
| |
| printk(KERN_INFO "%s\n", ixgbevf_copyright); |
| |
| ret = pci_register_driver(&ixgbevf_driver); |
| return ret; |
| } |
| |
| module_init(ixgbevf_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 ixgbevf_exit_module(void) |
| { |
| pci_unregister_driver(&ixgbevf_driver); |
| } |
| |
| #ifdef DEBUG |
| /** |
| * ixgbe_get_hw_dev_name - return device name string |
| * used by hardware layer to print debugging information |
| **/ |
| char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw) |
| { |
| struct ixgbevf_adapter *adapter = hw->back; |
| return adapter->netdev->name; |
| } |
| |
| #endif |
| module_exit(ixgbevf_exit_module); |
| |
| /* ixgbevf_main.c */ |