| /******************************************************************************* |
| |
| Intel 82599 Virtual Function driver |
| Copyright(c) 1999 - 2015 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, see <http://www.gnu.org/licenses/>. |
| |
| 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 |
| ******************************************************************************/ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/types.h> |
| #include <linux/bitops.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/sctp.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.h> |
| #include <linux/if_vlan.h> |
| #include <linux/prefetch.h> |
| |
| #include "ixgbevf.h" |
| |
| const char ixgbevf_driver_name[] = "ixgbevf"; |
| static const char ixgbevf_driver_string[] = |
| "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver"; |
| |
| #define DRV_VERSION "2.12.1-k" |
| const char ixgbevf_driver_version[] = DRV_VERSION; |
| static char ixgbevf_copyright[] = |
| "Copyright (c) 2009 - 2015 Intel Corporation."; |
| |
| static const struct ixgbevf_info *ixgbevf_info_tbl[] = { |
| [board_82599_vf] = &ixgbevf_82599_vf_info, |
| [board_X540_vf] = &ixgbevf_X540_vf_info, |
| [board_X550_vf] = &ixgbevf_X550_vf_info, |
| [board_X550EM_x_vf] = &ixgbevf_X550EM_x_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 const struct pci_device_id ixgbevf_pci_tbl[] = { |
| {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf }, |
| {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf }, |
| {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf }, |
| {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf }, |
| /* required last entry */ |
| {0, } |
| }; |
| MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl); |
| |
| MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); |
| MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| |
| #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) |
| static int debug = -1; |
| module_param(debug, int, 0); |
| MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
| |
| static struct workqueue_struct *ixgbevf_wq; |
| |
| static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter) |
| { |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state) && |
| !test_bit(__IXGBEVF_REMOVING, &adapter->state) && |
| !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state)) |
| queue_work(ixgbevf_wq, &adapter->service_task); |
| } |
| |
| static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter) |
| { |
| BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state)); |
| |
| /* flush memory to make sure state is correct before next watchdog */ |
| smp_mb__before_atomic(); |
| clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state); |
| } |
| |
| /* forward decls */ |
| static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter); |
| static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector); |
| static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter); |
| |
| static void ixgbevf_remove_adapter(struct ixgbe_hw *hw) |
| { |
| struct ixgbevf_adapter *adapter = hw->back; |
| |
| if (!hw->hw_addr) |
| return; |
| hw->hw_addr = NULL; |
| dev_err(&adapter->pdev->dev, "Adapter removed\n"); |
| if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state)) |
| ixgbevf_service_event_schedule(adapter); |
| } |
| |
| static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg) |
| { |
| u32 value; |
| |
| /* The following check not only optimizes a bit by not |
| * performing a read on the status register when the |
| * register just read was a status register read that |
| * returned IXGBE_FAILED_READ_REG. It also blocks any |
| * potential recursion. |
| */ |
| if (reg == IXGBE_VFSTATUS) { |
| ixgbevf_remove_adapter(hw); |
| return; |
| } |
| value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS); |
| if (value == IXGBE_FAILED_READ_REG) |
| ixgbevf_remove_adapter(hw); |
| } |
| |
| u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg) |
| { |
| u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr); |
| u32 value; |
| |
| if (IXGBE_REMOVED(reg_addr)) |
| return IXGBE_FAILED_READ_REG; |
| value = readl(reg_addr + reg); |
| if (unlikely(value == IXGBE_FAILED_READ_REG)) |
| ixgbevf_check_remove(hw, reg); |
| return value; |
| } |
| |
| /** |
| * ixgbevf_set_ivar - set IVAR registers - maps 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_ring *tx_ring, |
| struct ixgbevf_tx_buffer *tx_buffer) |
| { |
| if (tx_buffer->skb) { |
| dev_kfree_skb_any(tx_buffer->skb); |
| if (dma_unmap_len(tx_buffer, len)) |
| dma_unmap_single(tx_ring->dev, |
| dma_unmap_addr(tx_buffer, dma), |
| dma_unmap_len(tx_buffer, len), |
| DMA_TO_DEVICE); |
| } else if (dma_unmap_len(tx_buffer, len)) { |
| dma_unmap_page(tx_ring->dev, |
| dma_unmap_addr(tx_buffer, dma), |
| dma_unmap_len(tx_buffer, len), |
| DMA_TO_DEVICE); |
| } |
| tx_buffer->next_to_watch = NULL; |
| tx_buffer->skb = NULL; |
| dma_unmap_len_set(tx_buffer, len, 0); |
| /* tx_buffer must be completely set up in the transmit path */ |
| } |
| |
| static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring) |
| { |
| return ring->stats.packets; |
| } |
| |
| static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx)); |
| u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx)); |
| |
| if (head != tail) |
| return (head < tail) ? |
| tail - head : (tail + ring->count - head); |
| |
| return 0; |
| } |
| |
| static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring) |
| { |
| u32 tx_done = ixgbevf_get_tx_completed(tx_ring); |
| u32 tx_done_old = tx_ring->tx_stats.tx_done_old; |
| u32 tx_pending = ixgbevf_get_tx_pending(tx_ring); |
| |
| clear_check_for_tx_hang(tx_ring); |
| |
| /* Check for a hung queue, but be thorough. This verifies |
| * that a transmit has been completed since the previous |
| * check AND there is at least one packet pending. The |
| * ARMED bit is set to indicate a potential hang. |
| */ |
| if ((tx_done_old == tx_done) && tx_pending) { |
| /* make sure it is true for two checks in a row */ |
| return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED, |
| &tx_ring->state); |
| } |
| /* reset the countdown */ |
| clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state); |
| |
| /* update completed stats and continue */ |
| tx_ring->tx_stats.tx_done_old = tx_done; |
| |
| return false; |
| } |
| |
| static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter) |
| { |
| /* Do the reset outside of interrupt context */ |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) { |
| adapter->flags |= IXGBEVF_FLAG_RESET_REQUESTED; |
| ixgbevf_service_event_schedule(adapter); |
| } |
| } |
| |
| /** |
| * 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); |
| |
| ixgbevf_tx_timeout_reset(adapter); |
| } |
| |
| /** |
| * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes |
| * @q_vector: board private structure |
| * @tx_ring: tx ring to clean |
| **/ |
| static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector, |
| struct ixgbevf_ring *tx_ring) |
| { |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| struct ixgbevf_tx_buffer *tx_buffer; |
| union ixgbe_adv_tx_desc *tx_desc; |
| unsigned int total_bytes = 0, total_packets = 0; |
| unsigned int budget = tx_ring->count / 2; |
| unsigned int i = tx_ring->next_to_clean; |
| |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| return true; |
| |
| tx_buffer = &tx_ring->tx_buffer_info[i]; |
| tx_desc = IXGBEVF_TX_DESC(tx_ring, i); |
| i -= tx_ring->count; |
| |
| do { |
| union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch; |
| |
| /* if next_to_watch is not set then there is no work pending */ |
| if (!eop_desc) |
| break; |
| |
| /* prevent any other reads prior to eop_desc */ |
| read_barrier_depends(); |
| |
| /* if DD is not set pending work has not been completed */ |
| if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD))) |
| break; |
| |
| /* clear next_to_watch to prevent false hangs */ |
| tx_buffer->next_to_watch = NULL; |
| |
| /* update the statistics for this packet */ |
| total_bytes += tx_buffer->bytecount; |
| total_packets += tx_buffer->gso_segs; |
| |
| /* free the skb */ |
| dev_kfree_skb_any(tx_buffer->skb); |
| |
| /* unmap skb header data */ |
| dma_unmap_single(tx_ring->dev, |
| dma_unmap_addr(tx_buffer, dma), |
| dma_unmap_len(tx_buffer, len), |
| DMA_TO_DEVICE); |
| |
| /* clear tx_buffer data */ |
| tx_buffer->skb = NULL; |
| dma_unmap_len_set(tx_buffer, len, 0); |
| |
| /* unmap remaining buffers */ |
| while (tx_desc != eop_desc) { |
| tx_buffer++; |
| tx_desc++; |
| i++; |
| if (unlikely(!i)) { |
| i -= tx_ring->count; |
| tx_buffer = tx_ring->tx_buffer_info; |
| tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); |
| } |
| |
| /* unmap any remaining paged data */ |
| if (dma_unmap_len(tx_buffer, len)) { |
| dma_unmap_page(tx_ring->dev, |
| dma_unmap_addr(tx_buffer, dma), |
| dma_unmap_len(tx_buffer, len), |
| DMA_TO_DEVICE); |
| dma_unmap_len_set(tx_buffer, len, 0); |
| } |
| } |
| |
| /* move us one more past the eop_desc for start of next pkt */ |
| tx_buffer++; |
| tx_desc++; |
| i++; |
| if (unlikely(!i)) { |
| i -= tx_ring->count; |
| tx_buffer = tx_ring->tx_buffer_info; |
| tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); |
| } |
| |
| /* issue prefetch for next Tx descriptor */ |
| prefetch(tx_desc); |
| |
| /* update budget accounting */ |
| budget--; |
| } while (likely(budget)); |
| |
| i += tx_ring->count; |
| tx_ring->next_to_clean = i; |
| u64_stats_update_begin(&tx_ring->syncp); |
| tx_ring->stats.bytes += total_bytes; |
| tx_ring->stats.packets += total_packets; |
| u64_stats_update_end(&tx_ring->syncp); |
| q_vector->tx.total_bytes += total_bytes; |
| q_vector->tx.total_packets += total_packets; |
| |
| if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) { |
| struct ixgbe_hw *hw = &adapter->hw; |
| union ixgbe_adv_tx_desc *eop_desc; |
| |
| eop_desc = tx_ring->tx_buffer_info[i].next_to_watch; |
| |
| pr_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" |
| " next_to_watch <%p>\n" |
| " eop_desc->wb.status <%x>\n" |
| " time_stamp <%lx>\n" |
| " jiffies <%lx>\n", |
| tx_ring->queue_index, |
| IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)), |
| IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)), |
| tx_ring->next_to_use, i, |
| eop_desc, (eop_desc ? eop_desc->wb.status : 0), |
| tx_ring->tx_buffer_info[i].time_stamp, jiffies); |
| |
| netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); |
| |
| /* schedule immediate reset if we believe we hung */ |
| ixgbevf_tx_timeout_reset(adapter); |
| |
| return true; |
| } |
| |
| #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) |
| if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) && |
| (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) { |
| /* Make sure that anybody stopping the queue after this |
| * sees the new next_to_clean. |
| */ |
| smp_mb(); |
| |
| if (__netif_subqueue_stopped(tx_ring->netdev, |
| tx_ring->queue_index) && |
| !test_bit(__IXGBEVF_DOWN, &adapter->state)) { |
| netif_wake_subqueue(tx_ring->netdev, |
| tx_ring->queue_index); |
| ++tx_ring->tx_stats.restart_queue; |
| } |
| } |
| |
| return !!budget; |
| } |
| |
| /** |
| * ixgbevf_rx_skb - Helper function to determine proper Rx method |
| * @q_vector: structure containing interrupt and ring information |
| * @skb: packet to send up |
| **/ |
| static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector, |
| struct sk_buff *skb) |
| { |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| skb_mark_napi_id(skb, &q_vector->napi); |
| |
| if (ixgbevf_qv_busy_polling(q_vector)) { |
| netif_receive_skb(skb); |
| /* exit early if we busy polled */ |
| return; |
| } |
| #endif /* CONFIG_NET_RX_BUSY_POLL */ |
| |
| napi_gro_receive(&q_vector->napi, skb); |
| } |
| |
| #define IXGBE_RSS_L4_TYPES_MASK \ |
| ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \ |
| (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \ |
| (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \ |
| (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP)) |
| |
| static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring, |
| union ixgbe_adv_rx_desc *rx_desc, |
| struct sk_buff *skb) |
| { |
| u16 rss_type; |
| |
| if (!(ring->netdev->features & NETIF_F_RXHASH)) |
| return; |
| |
| rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) & |
| IXGBE_RXDADV_RSSTYPE_MASK; |
| |
| if (!rss_type) |
| return; |
| |
| skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss), |
| (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ? |
| PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3); |
| } |
| |
| /** |
| * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum |
| * @ring: structure containig ring specific data |
| * @rx_desc: current Rx descriptor being processed |
| * @skb: skb currently being received and modified |
| **/ |
| static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring, |
| union ixgbe_adv_rx_desc *rx_desc, |
| struct sk_buff *skb) |
| { |
| skb_checksum_none_assert(skb); |
| |
| /* Rx csum disabled */ |
| if (!(ring->netdev->features & NETIF_F_RXCSUM)) |
| return; |
| |
| /* if IP and error */ |
| if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) && |
| ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) { |
| ring->rx_stats.csum_err++; |
| return; |
| } |
| |
| if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS)) |
| return; |
| |
| if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) { |
| ring->rx_stats.csum_err++; |
| return; |
| } |
| |
| /* It must be a TCP or UDP packet with a valid checksum */ |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| } |
| |
| /** |
| * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor |
| * @rx_ring: rx descriptor ring packet is being transacted on |
| * @rx_desc: pointer to the EOP Rx descriptor |
| * @skb: pointer to current skb being populated |
| * |
| * This function checks the ring, descriptor, and packet information in |
| * order to populate the checksum, VLAN, protocol, and other fields within |
| * the skb. |
| **/ |
| static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring, |
| union ixgbe_adv_rx_desc *rx_desc, |
| struct sk_buff *skb) |
| { |
| ixgbevf_rx_hash(rx_ring, rx_desc, skb); |
| ixgbevf_rx_checksum(rx_ring, rx_desc, skb); |
| |
| if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) { |
| u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan); |
| unsigned long *active_vlans = netdev_priv(rx_ring->netdev); |
| |
| if (test_bit(vid & VLAN_VID_MASK, active_vlans)) |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); |
| } |
| |
| skb->protocol = eth_type_trans(skb, rx_ring->netdev); |
| } |
| |
| /** |
| * ixgbevf_is_non_eop - process handling of non-EOP buffers |
| * @rx_ring: Rx ring being processed |
| * @rx_desc: Rx descriptor for current buffer |
| * @skb: current socket buffer containing buffer in progress |
| * |
| * This function updates next to clean. If the buffer is an EOP buffer |
| * this function exits returning false, otherwise it will place the |
| * sk_buff in the next buffer to be chained and return true indicating |
| * that this is in fact a non-EOP buffer. |
| **/ |
| static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring, |
| union ixgbe_adv_rx_desc *rx_desc) |
| { |
| u32 ntc = rx_ring->next_to_clean + 1; |
| |
| /* fetch, update, and store next to clean */ |
| ntc = (ntc < rx_ring->count) ? ntc : 0; |
| rx_ring->next_to_clean = ntc; |
| |
| prefetch(IXGBEVF_RX_DESC(rx_ring, ntc)); |
| |
| if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))) |
| return false; |
| |
| return true; |
| } |
| |
| static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring, |
| struct ixgbevf_rx_buffer *bi) |
| { |
| struct page *page = bi->page; |
| dma_addr_t dma = bi->dma; |
| |
| /* since we are recycling buffers we should seldom need to alloc */ |
| if (likely(page)) |
| return true; |
| |
| /* alloc new page for storage */ |
| page = dev_alloc_page(); |
| if (unlikely(!page)) { |
| rx_ring->rx_stats.alloc_rx_page_failed++; |
| return false; |
| } |
| |
| /* map page for use */ |
| dma = dma_map_page(rx_ring->dev, page, 0, |
| PAGE_SIZE, DMA_FROM_DEVICE); |
| |
| /* if mapping failed free memory back to system since |
| * there isn't much point in holding memory we can't use |
| */ |
| if (dma_mapping_error(rx_ring->dev, dma)) { |
| __free_page(page); |
| |
| rx_ring->rx_stats.alloc_rx_buff_failed++; |
| return false; |
| } |
| |
| bi->dma = dma; |
| bi->page = page; |
| bi->page_offset = 0; |
| |
| return true; |
| } |
| |
| /** |
| * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split |
| * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on |
| * @cleaned_count: number of buffers to replace |
| **/ |
| static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring, |
| u16 cleaned_count) |
| { |
| union ixgbe_adv_rx_desc *rx_desc; |
| struct ixgbevf_rx_buffer *bi; |
| unsigned int i = rx_ring->next_to_use; |
| |
| /* nothing to do or no valid netdev defined */ |
| if (!cleaned_count || !rx_ring->netdev) |
| return; |
| |
| rx_desc = IXGBEVF_RX_DESC(rx_ring, i); |
| bi = &rx_ring->rx_buffer_info[i]; |
| i -= rx_ring->count; |
| |
| do { |
| if (!ixgbevf_alloc_mapped_page(rx_ring, bi)) |
| break; |
| |
| /* Refresh the desc even if pkt_addr didn't change |
| * because each write-back erases this info. |
| */ |
| rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset); |
| |
| rx_desc++; |
| bi++; |
| i++; |
| if (unlikely(!i)) { |
| rx_desc = IXGBEVF_RX_DESC(rx_ring, 0); |
| bi = rx_ring->rx_buffer_info; |
| i -= rx_ring->count; |
| } |
| |
| /* clear the hdr_addr for the next_to_use descriptor */ |
| rx_desc->read.hdr_addr = 0; |
| |
| cleaned_count--; |
| } while (cleaned_count); |
| |
| i += rx_ring->count; |
| |
| if (rx_ring->next_to_use != i) { |
| /* record the next descriptor to use */ |
| rx_ring->next_to_use = i; |
| |
| /* update next to alloc since we have filled the ring */ |
| rx_ring->next_to_alloc = i; |
| |
| /* 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(); |
| ixgbevf_write_tail(rx_ring, i); |
| } |
| } |
| |
| /** |
| * ixgbevf_cleanup_headers - Correct corrupted or empty headers |
| * @rx_ring: rx descriptor ring packet is being transacted on |
| * @rx_desc: pointer to the EOP Rx descriptor |
| * @skb: pointer to current skb being fixed |
| * |
| * Check for corrupted packet headers caused by senders on the local L2 |
| * embedded NIC switch not setting up their Tx Descriptors right. These |
| * should be very rare. |
| * |
| * Also address the case where we are pulling data in on pages only |
| * and as such no data is present in the skb header. |
| * |
| * In addition if skb is not at least 60 bytes we need to pad it so that |
| * it is large enough to qualify as a valid Ethernet frame. |
| * |
| * Returns true if an error was encountered and skb was freed. |
| **/ |
| static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring, |
| union ixgbe_adv_rx_desc *rx_desc, |
| struct sk_buff *skb) |
| { |
| /* verify that the packet does not have any known errors */ |
| if (unlikely(ixgbevf_test_staterr(rx_desc, |
| IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) { |
| struct net_device *netdev = rx_ring->netdev; |
| |
| if (!(netdev->features & NETIF_F_RXALL)) { |
| dev_kfree_skb_any(skb); |
| return true; |
| } |
| } |
| |
| /* if eth_skb_pad returns an error the skb was freed */ |
| if (eth_skb_pad(skb)) |
| return true; |
| |
| return false; |
| } |
| |
| /** |
| * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring |
| * @rx_ring: rx descriptor ring to store buffers on |
| * @old_buff: donor buffer to have page reused |
| * |
| * Synchronizes page for reuse by the adapter |
| **/ |
| static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring, |
| struct ixgbevf_rx_buffer *old_buff) |
| { |
| struct ixgbevf_rx_buffer *new_buff; |
| u16 nta = rx_ring->next_to_alloc; |
| |
| new_buff = &rx_ring->rx_buffer_info[nta]; |
| |
| /* update, and store next to alloc */ |
| nta++; |
| rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; |
| |
| /* transfer page from old buffer to new buffer */ |
| new_buff->page = old_buff->page; |
| new_buff->dma = old_buff->dma; |
| new_buff->page_offset = old_buff->page_offset; |
| |
| /* sync the buffer for use by the device */ |
| dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma, |
| new_buff->page_offset, |
| IXGBEVF_RX_BUFSZ, |
| DMA_FROM_DEVICE); |
| } |
| |
| static inline bool ixgbevf_page_is_reserved(struct page *page) |
| { |
| return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page); |
| } |
| |
| /** |
| * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff |
| * @rx_ring: rx descriptor ring to transact packets on |
| * @rx_buffer: buffer containing page to add |
| * @rx_desc: descriptor containing length of buffer written by hardware |
| * @skb: sk_buff to place the data into |
| * |
| * This function will add the data contained in rx_buffer->page to the skb. |
| * This is done either through a direct copy if the data in the buffer is |
| * less than the skb header size, otherwise it will just attach the page as |
| * a frag to the skb. |
| * |
| * The function will then update the page offset if necessary and return |
| * true if the buffer can be reused by the adapter. |
| **/ |
| static bool ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring, |
| struct ixgbevf_rx_buffer *rx_buffer, |
| union ixgbe_adv_rx_desc *rx_desc, |
| struct sk_buff *skb) |
| { |
| struct page *page = rx_buffer->page; |
| unsigned char *va = page_address(page) + rx_buffer->page_offset; |
| unsigned int size = le16_to_cpu(rx_desc->wb.upper.length); |
| #if (PAGE_SIZE < 8192) |
| unsigned int truesize = IXGBEVF_RX_BUFSZ; |
| #else |
| unsigned int truesize = ALIGN(size, L1_CACHE_BYTES); |
| #endif |
| unsigned int pull_len; |
| |
| if (unlikely(skb_is_nonlinear(skb))) |
| goto add_tail_frag; |
| |
| if (likely(size <= IXGBEVF_RX_HDR_SIZE)) { |
| memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long))); |
| |
| /* page is not reserved, we can reuse buffer as is */ |
| if (likely(!ixgbevf_page_is_reserved(page))) |
| return true; |
| |
| /* this page cannot be reused so discard it */ |
| put_page(page); |
| return false; |
| } |
| |
| /* we need the header to contain the greater of either ETH_HLEN or |
| * 60 bytes if the skb->len is less than 60 for skb_pad. |
| */ |
| pull_len = eth_get_headlen(va, IXGBEVF_RX_HDR_SIZE); |
| |
| /* align pull length to size of long to optimize memcpy performance */ |
| memcpy(__skb_put(skb, pull_len), va, ALIGN(pull_len, sizeof(long))); |
| |
| /* update all of the pointers */ |
| va += pull_len; |
| size -= pull_len; |
| |
| add_tail_frag: |
| skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, |
| (unsigned long)va & ~PAGE_MASK, size, truesize); |
| |
| /* avoid re-using remote pages */ |
| if (unlikely(ixgbevf_page_is_reserved(page))) |
| return false; |
| |
| #if (PAGE_SIZE < 8192) |
| /* if we are only owner of page we can reuse it */ |
| if (unlikely(page_count(page) != 1)) |
| return false; |
| |
| /* flip page offset to other buffer */ |
| rx_buffer->page_offset ^= IXGBEVF_RX_BUFSZ; |
| |
| #else |
| /* move offset up to the next cache line */ |
| rx_buffer->page_offset += truesize; |
| |
| if (rx_buffer->page_offset > (PAGE_SIZE - IXGBEVF_RX_BUFSZ)) |
| return false; |
| |
| #endif |
| /* Even if we own the page, we are not allowed to use atomic_set() |
| * This would break get_page_unless_zero() users. |
| */ |
| page_ref_inc(page); |
| |
| return true; |
| } |
| |
| static struct sk_buff *ixgbevf_fetch_rx_buffer(struct ixgbevf_ring *rx_ring, |
| union ixgbe_adv_rx_desc *rx_desc, |
| struct sk_buff *skb) |
| { |
| struct ixgbevf_rx_buffer *rx_buffer; |
| struct page *page; |
| |
| rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; |
| page = rx_buffer->page; |
| prefetchw(page); |
| |
| if (likely(!skb)) { |
| void *page_addr = page_address(page) + |
| rx_buffer->page_offset; |
| |
| /* prefetch first cache line of first page */ |
| prefetch(page_addr); |
| #if L1_CACHE_BYTES < 128 |
| prefetch(page_addr + L1_CACHE_BYTES); |
| #endif |
| |
| /* allocate a skb to store the frags */ |
| skb = netdev_alloc_skb_ip_align(rx_ring->netdev, |
| IXGBEVF_RX_HDR_SIZE); |
| if (unlikely(!skb)) { |
| rx_ring->rx_stats.alloc_rx_buff_failed++; |
| return NULL; |
| } |
| |
| /* we will be copying header into skb->data in |
| * pskb_may_pull so it is in our interest to prefetch |
| * it now to avoid a possible cache miss |
| */ |
| prefetchw(skb->data); |
| } |
| |
| /* we are reusing so sync this buffer for CPU use */ |
| dma_sync_single_range_for_cpu(rx_ring->dev, |
| rx_buffer->dma, |
| rx_buffer->page_offset, |
| IXGBEVF_RX_BUFSZ, |
| DMA_FROM_DEVICE); |
| |
| /* pull page into skb */ |
| if (ixgbevf_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) { |
| /* hand second half of page back to the ring */ |
| ixgbevf_reuse_rx_page(rx_ring, rx_buffer); |
| } else { |
| /* we are not reusing the buffer so unmap it */ |
| dma_unmap_page(rx_ring->dev, rx_buffer->dma, |
| PAGE_SIZE, DMA_FROM_DEVICE); |
| } |
| |
| /* clear contents of buffer_info */ |
| rx_buffer->dma = 0; |
| rx_buffer->page = NULL; |
| |
| return skb; |
| } |
| |
| static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter, |
| u32 qmask) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask); |
| } |
| |
| static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector, |
| struct ixgbevf_ring *rx_ring, |
| int budget) |
| { |
| unsigned int total_rx_bytes = 0, total_rx_packets = 0; |
| u16 cleaned_count = ixgbevf_desc_unused(rx_ring); |
| struct sk_buff *skb = rx_ring->skb; |
| |
| while (likely(total_rx_packets < budget)) { |
| union ixgbe_adv_rx_desc *rx_desc; |
| |
| /* return some buffers to hardware, one at a time is too slow */ |
| if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) { |
| ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count); |
| cleaned_count = 0; |
| } |
| |
| rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean); |
| |
| if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_DD)) |
| break; |
| |
| /* This memory barrier is needed to keep us from reading |
| * any other fields out of the rx_desc until we know the |
| * RXD_STAT_DD bit is set |
| */ |
| rmb(); |
| |
| /* retrieve a buffer from the ring */ |
| skb = ixgbevf_fetch_rx_buffer(rx_ring, rx_desc, skb); |
| |
| /* exit if we failed to retrieve a buffer */ |
| if (!skb) |
| break; |
| |
| cleaned_count++; |
| |
| /* fetch next buffer in frame if non-eop */ |
| if (ixgbevf_is_non_eop(rx_ring, rx_desc)) |
| continue; |
| |
| /* verify the packet layout is correct */ |
| if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) { |
| skb = NULL; |
| continue; |
| } |
| |
| /* probably a little skewed due to removing CRC */ |
| total_rx_bytes += skb->len; |
| |
| /* Workaround hardware that can't do proper VEPA multicast |
| * source pruning. |
| */ |
| if ((skb->pkt_type == PACKET_BROADCAST || |
| skb->pkt_type == PACKET_MULTICAST) && |
| ether_addr_equal(rx_ring->netdev->dev_addr, |
| eth_hdr(skb)->h_source)) { |
| dev_kfree_skb_irq(skb); |
| continue; |
| } |
| |
| /* populate checksum, VLAN, and protocol */ |
| ixgbevf_process_skb_fields(rx_ring, rx_desc, skb); |
| |
| ixgbevf_rx_skb(q_vector, skb); |
| |
| /* reset skb pointer */ |
| skb = NULL; |
| |
| /* update budget accounting */ |
| total_rx_packets++; |
| } |
| |
| /* place incomplete frames back on ring for completion */ |
| rx_ring->skb = skb; |
| |
| u64_stats_update_begin(&rx_ring->syncp); |
| rx_ring->stats.packets += total_rx_packets; |
| rx_ring->stats.bytes += total_rx_bytes; |
| u64_stats_update_end(&rx_ring->syncp); |
| q_vector->rx.total_packets += total_rx_packets; |
| q_vector->rx.total_bytes += total_rx_bytes; |
| |
| return total_rx_packets; |
| } |
| |
| /** |
| * ixgbevf_poll - NAPI polling calback |
| * @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 or more rings associated with a |
| * q_vector. |
| **/ |
| static int ixgbevf_poll(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 *ring; |
| int per_ring_budget, work_done = 0; |
| bool clean_complete = true; |
| |
| ixgbevf_for_each_ring(ring, q_vector->tx) |
| clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring); |
| |
| if (budget <= 0) |
| return budget; |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| if (!ixgbevf_qv_lock_napi(q_vector)) |
| return budget; |
| #endif |
| |
| /* attempt to distribute budget to each queue fairly, but don't allow |
| * the budget to go below 1 because we'll exit polling |
| */ |
| if (q_vector->rx.count > 1) |
| per_ring_budget = max(budget/q_vector->rx.count, 1); |
| else |
| per_ring_budget = budget; |
| |
| ixgbevf_for_each_ring(ring, q_vector->rx) { |
| int cleaned = ixgbevf_clean_rx_irq(q_vector, ring, |
| per_ring_budget); |
| work_done += cleaned; |
| clean_complete &= (cleaned < per_ring_budget); |
| } |
| |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| ixgbevf_qv_unlock_napi(q_vector); |
| #endif |
| |
| /* If all work not completed, return budget and keep polling */ |
| if (!clean_complete) |
| return budget; |
| /* all work done, exit the polling mode */ |
| napi_complete_done(napi, work_done); |
| if (adapter->rx_itr_setting == 1) |
| ixgbevf_set_itr(q_vector); |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state) && |
| !test_bit(__IXGBEVF_REMOVING, &adapter->state)) |
| ixgbevf_irq_enable_queues(adapter, |
| 1 << q_vector->v_idx); |
| |
| return 0; |
| } |
| |
| /** |
| * ixgbevf_write_eitr - write VTEITR register in hardware specific way |
| * @q_vector: structure containing interrupt and ring information |
| **/ |
| void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector) |
| { |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| struct ixgbe_hw *hw = &adapter->hw; |
| int v_idx = q_vector->v_idx; |
| u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR; |
| |
| /* 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); |
| } |
| |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| /* must be called with local_bh_disable()d */ |
| static int ixgbevf_busy_poll_recv(struct napi_struct *napi) |
| { |
| struct ixgbevf_q_vector *q_vector = |
| container_of(napi, struct ixgbevf_q_vector, napi); |
| struct ixgbevf_adapter *adapter = q_vector->adapter; |
| struct ixgbevf_ring *ring; |
| int found = 0; |
| |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| return LL_FLUSH_FAILED; |
| |
| if (!ixgbevf_qv_lock_poll(q_vector)) |
| return LL_FLUSH_BUSY; |
| |
| ixgbevf_for_each_ring(ring, q_vector->rx) { |
| found = ixgbevf_clean_rx_irq(q_vector, ring, 4); |
| #ifdef BP_EXTENDED_STATS |
| if (found) |
| ring->stats.cleaned += found; |
| else |
| ring->stats.misses++; |
| #endif |
| if (found) |
| break; |
| } |
| |
| ixgbevf_qv_unlock_poll(q_vector); |
| |
| return found; |
| } |
| #endif /* CONFIG_NET_RX_BUSY_POLL */ |
| |
| /** |
| * 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; |
| int q_vectors, v_idx; |
| |
| q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| adapter->eims_enable_mask = 0; |
| |
| /* Populate the IVAR table and set the ITR values to the |
| * corresponding register. |
| */ |
| for (v_idx = 0; v_idx < q_vectors; v_idx++) { |
| struct ixgbevf_ring *ring; |
| |
| q_vector = adapter->q_vector[v_idx]; |
| |
| ixgbevf_for_each_ring(ring, q_vector->rx) |
| ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx); |
| |
| ixgbevf_for_each_ring(ring, q_vector->tx) |
| ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx); |
| |
| if (q_vector->tx.ring && !q_vector->rx.ring) { |
| /* Tx only vector */ |
| if (adapter->tx_itr_setting == 1) |
| q_vector->itr = IXGBE_12K_ITR; |
| else |
| q_vector->itr = adapter->tx_itr_setting; |
| } else { |
| /* Rx or Rx/Tx vector */ |
| if (adapter->rx_itr_setting == 1) |
| q_vector->itr = IXGBE_20K_ITR; |
| else |
| q_vector->itr = adapter->rx_itr_setting; |
| } |
| |
| /* add q_vector eims value to global eims_enable_mask */ |
| adapter->eims_enable_mask |= 1 << v_idx; |
| |
| ixgbevf_write_eitr(q_vector); |
| } |
| |
| ixgbevf_set_ivar(adapter, -1, 1, v_idx); |
| /* setup eims_other and add value to global eims_enable_mask */ |
| adapter->eims_other = 1 << v_idx; |
| adapter->eims_enable_mask |= adapter->eims_other; |
| } |
| |
| 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 |
| * @q_vector: structure containing interrupt and ring information |
| * @ring_container: structure containing ring performance data |
| * |
| * 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 void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector, |
| struct ixgbevf_ring_container *ring_container) |
| { |
| int bytes = ring_container->total_bytes; |
| int packets = ring_container->total_packets; |
| u32 timepassed_us; |
| u64 bytes_perint; |
| u8 itr_setting = ring_container->itr; |
| |
| if (packets == 0) |
| return; |
| |
| /* simple throttle rate management |
| * 0-20MB/s lowest (100000 ints/s) |
| * 20-100MB/s low (20000 ints/s) |
| * 100-1249MB/s bulk (12000 ints/s) |
| */ |
| /* what was last interrupt timeslice? */ |
| timepassed_us = q_vector->itr >> 2; |
| bytes_perint = bytes / timepassed_us; /* bytes/usec */ |
| |
| switch (itr_setting) { |
| case lowest_latency: |
| if (bytes_perint > 10) |
| itr_setting = low_latency; |
| break; |
| case low_latency: |
| if (bytes_perint > 20) |
| itr_setting = bulk_latency; |
| else if (bytes_perint <= 10) |
| itr_setting = lowest_latency; |
| break; |
| case bulk_latency: |
| if (bytes_perint <= 20) |
| itr_setting = low_latency; |
| break; |
| } |
| |
| /* clear work counters since we have the values we need */ |
| ring_container->total_bytes = 0; |
| ring_container->total_packets = 0; |
| |
| /* write updated itr to ring container */ |
| ring_container->itr = itr_setting; |
| } |
| |
| static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector) |
| { |
| u32 new_itr = q_vector->itr; |
| u8 current_itr; |
| |
| ixgbevf_update_itr(q_vector, &q_vector->tx); |
| ixgbevf_update_itr(q_vector, &q_vector->rx); |
| |
| 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 = IXGBE_100K_ITR; |
| break; |
| case low_latency: |
| new_itr = IXGBE_20K_ITR; |
| break; |
| case bulk_latency: |
| new_itr = IXGBE_12K_ITR; |
| break; |
| default: |
| break; |
| } |
| |
| if (new_itr != q_vector->itr) { |
| /* do an exponential smoothing */ |
| new_itr = (10 * new_itr * q_vector->itr) / |
| ((9 * new_itr) + q_vector->itr); |
| |
| /* save the algorithm value here */ |
| q_vector->itr = new_itr; |
| |
| ixgbevf_write_eitr(q_vector); |
| } |
| } |
| |
| static irqreturn_t ixgbevf_msix_other(int irq, void *data) |
| { |
| struct ixgbevf_adapter *adapter = data; |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| hw->mac.get_link_status = 1; |
| |
| ixgbevf_service_event_schedule(adapter); |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ixgbevf_msix_clean_rings - 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_rings(int irq, void *data) |
| { |
| struct ixgbevf_q_vector *q_vector = data; |
| |
| /* EIAM disabled interrupts (on this vector) for us */ |
| if (q_vector->rx.ring || q_vector->tx.ring) |
| napi_schedule_irqoff(&q_vector->napi); |
| |
| 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]; |
| |
| a->rx_ring[r_idx]->next = q_vector->rx.ring; |
| q_vector->rx.ring = a->rx_ring[r_idx]; |
| q_vector->rx.count++; |
| } |
| |
| 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]; |
| |
| a->tx_ring[t_idx]->next = q_vector->tx.ring; |
| q_vector->tx.ring = a->tx_ring[t_idx]; |
| q_vector->tx.count++; |
| } |
| |
| /** |
| * 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; |
| |
| 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); |
| return 0; |
| } |
| |
| /* 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--; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * 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; |
| int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| int vector, err; |
| int ri = 0, ti = 0; |
| |
| for (vector = 0; vector < q_vectors; vector++) { |
| struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector]; |
| struct msix_entry *entry = &adapter->msix_entries[vector]; |
| |
| if (q_vector->tx.ring && q_vector->rx.ring) { |
| snprintf(q_vector->name, sizeof(q_vector->name) - 1, |
| "%s-%s-%d", netdev->name, "TxRx", ri++); |
| ti++; |
| } else if (q_vector->rx.ring) { |
| snprintf(q_vector->name, sizeof(q_vector->name) - 1, |
| "%s-%s-%d", netdev->name, "rx", ri++); |
| } else if (q_vector->tx.ring) { |
| snprintf(q_vector->name, sizeof(q_vector->name) - 1, |
| "%s-%s-%d", netdev->name, "tx", ti++); |
| } else { |
| /* skip this unused q_vector */ |
| continue; |
| } |
| err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0, |
| q_vector->name, q_vector); |
| if (err) { |
| hw_dbg(&adapter->hw, |
| "request_irq failed for MSIX interrupt Error: %d\n", |
| err); |
| goto free_queue_irqs; |
| } |
| } |
| |
| err = request_irq(adapter->msix_entries[vector].vector, |
| &ixgbevf_msix_other, 0, netdev->name, adapter); |
| if (err) { |
| hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n", |
| err); |
| goto free_queue_irqs; |
| } |
| |
| return 0; |
| |
| free_queue_irqs: |
| while (vector) { |
| vector--; |
| free_irq(adapter->msix_entries[vector].vector, |
| adapter->q_vector[vector]); |
| } |
| /* This failure is non-recoverable - it indicates the system is |
| * out of MSIX vector resources and the VF driver cannot run |
| * without them. Set the number of msix vectors to zero |
| * indicating that not enough can be allocated. The error |
| * will be returned to the user indicating device open failed. |
| * Any further attempts to force the driver to open will also |
| * fail. The only way to recover is to unload the driver and |
| * reload it again. If the system has recovered some MSIX |
| * vectors then it may succeed. |
| */ |
| adapter->num_msix_vectors = 0; |
| 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]; |
| |
| q_vector->rx.ring = NULL; |
| q_vector->tx.ring = NULL; |
| q_vector->rx.count = 0; |
| q_vector->tx.count = 0; |
| } |
| } |
| |
| /** |
| * 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 = 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) |
| { |
| int i, q_vectors; |
| |
| q_vectors = adapter->num_msix_vectors; |
| i = q_vectors - 1; |
| |
| free_irq(adapter->msix_entries[i].vector, adapter); |
| i--; |
| |
| for (; i >= 0; i--) { |
| /* free only the irqs that were actually requested */ |
| if (!adapter->q_vector[i]->rx.ring && |
| !adapter->q_vector[i]->tx.ring) |
| continue; |
| |
| 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) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| int i; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0); |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0); |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 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) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask); |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask); |
| IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask); |
| } |
| |
| /** |
| * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset |
| * @adapter: board private structure |
| * @ring: structure containing ring specific data |
| * |
| * Configure the Tx descriptor ring after a reset. |
| **/ |
| static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *ring) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| u64 tdba = ring->dma; |
| int wait_loop = 10; |
| u32 txdctl = IXGBE_TXDCTL_ENABLE; |
| u8 reg_idx = ring->reg_idx; |
| |
| /* disable queue to avoid issues while updating state */ |
| IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH); |
| IXGBE_WRITE_FLUSH(hw); |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32)); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx), |
| ring->count * sizeof(union ixgbe_adv_tx_desc)); |
| |
| /* disable head writeback */ |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0); |
| |
| /* enable relaxed ordering */ |
| IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx), |
| (IXGBE_DCA_TXCTRL_DESC_RRO_EN | |
| IXGBE_DCA_TXCTRL_DATA_RRO_EN)); |
| |
| /* reset head and tail pointers */ |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0); |
| IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0); |
| ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx); |
| |
| /* reset ntu and ntc to place SW in sync with hardwdare */ |
| ring->next_to_clean = 0; |
| ring->next_to_use = 0; |
| |
| /* In order to avoid issues WTHRESH + PTHRESH should always be equal |
| * to or less than the number of on chip descriptors, which is |
| * currently 40. |
| */ |
| txdctl |= (8 << 16); /* WTHRESH = 8 */ |
| |
| /* Setting PTHRESH to 32 both improves performance */ |
| txdctl |= (1 << 8) | /* HTHRESH = 1 */ |
| 32; /* PTHRESH = 32 */ |
| |
| clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state); |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl); |
| |
| /* poll to verify queue is enabled */ |
| do { |
| usleep_range(1000, 2000); |
| txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx)); |
| } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE)); |
| if (!wait_loop) |
| pr_err("Could not enable Tx Queue %d\n", reg_idx); |
| } |
| |
| /** |
| * 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) |
| { |
| u32 i; |
| |
| /* Setup the HW Tx Head and Tail descriptor pointers */ |
| for (i = 0; i < adapter->num_tx_queues; i++) |
| ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]); |
| } |
| |
| #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 |
| |
| static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 srrctl; |
| |
| srrctl = IXGBE_SRRCTL_DROP_EN; |
| |
| srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT; |
| srrctl |= IXGBEVF_RX_BUFSZ >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; |
| srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl); |
| } |
| |
| static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| /* PSRTYPE must be initialized in 82599 */ |
| u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR | |
| IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR | |
| IXGBE_PSRTYPE_L2HDR; |
| |
| if (adapter->num_rx_queues > 1) |
| psrtype |= 1 << 29; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype); |
| } |
| |
| #define IXGBEVF_MAX_RX_DESC_POLL 10 |
| static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *ring) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| int wait_loop = IXGBEVF_MAX_RX_DESC_POLL; |
| u32 rxdctl; |
| u8 reg_idx = ring->reg_idx; |
| |
| if (IXGBE_REMOVED(hw->hw_addr)) |
| return; |
| rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx)); |
| rxdctl &= ~IXGBE_RXDCTL_ENABLE; |
| |
| /* write value back with RXDCTL.ENABLE bit cleared */ |
| IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl); |
| |
| /* the hardware may take up to 100us to really disable the Rx queue */ |
| do { |
| udelay(10); |
| rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx)); |
| } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE)); |
| |
| if (!wait_loop) |
| pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n", |
| reg_idx); |
| } |
| |
| static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *ring) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| int wait_loop = IXGBEVF_MAX_RX_DESC_POLL; |
| u32 rxdctl; |
| u8 reg_idx = ring->reg_idx; |
| |
| if (IXGBE_REMOVED(hw->hw_addr)) |
| return; |
| do { |
| usleep_range(1000, 2000); |
| rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx)); |
| } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE)); |
| |
| if (!wait_loop) |
| pr_err("RXDCTL.ENABLE queue %d not set while polling\n", |
| reg_idx); |
| } |
| |
| static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 vfmrqc = 0, vfreta = 0; |
| u16 rss_i = adapter->num_rx_queues; |
| u8 i, j; |
| |
| /* Fill out hash function seeds */ |
| netdev_rss_key_fill(adapter->rss_key, sizeof(adapter->rss_key)); |
| for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++) |
| IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), adapter->rss_key[i]); |
| |
| for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) { |
| if (j == rss_i) |
| j = 0; |
| |
| adapter->rss_indir_tbl[i] = j; |
| |
| vfreta |= j << (i & 0x3) * 8; |
| if ((i & 3) == 3) { |
| IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta); |
| vfreta = 0; |
| } |
| } |
| |
| /* Perform hash on these packet types */ |
| vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 | |
| IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP | |
| IXGBE_VFMRQC_RSS_FIELD_IPV6 | |
| IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP; |
| |
| vfmrqc |= IXGBE_VFMRQC_RSSEN; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc); |
| } |
| |
| static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter, |
| struct ixgbevf_ring *ring) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| u64 rdba = ring->dma; |
| u32 rxdctl; |
| u8 reg_idx = ring->reg_idx; |
| |
| /* disable queue to avoid issues while updating state */ |
| rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx)); |
| ixgbevf_disable_rx_queue(adapter, ring); |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32)); |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32); |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx), |
| ring->count * sizeof(union ixgbe_adv_rx_desc)); |
| |
| /* enable relaxed ordering */ |
| IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx), |
| IXGBE_DCA_RXCTRL_DESC_RRO_EN); |
| |
| /* reset head and tail pointers */ |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0); |
| IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0); |
| ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx); |
| |
| /* reset ntu and ntc to place SW in sync with hardwdare */ |
| ring->next_to_clean = 0; |
| ring->next_to_use = 0; |
| ring->next_to_alloc = 0; |
| |
| ixgbevf_configure_srrctl(adapter, reg_idx); |
| |
| /* allow any size packet since we can handle overflow */ |
| rxdctl &= ~IXGBE_RXDCTL_RLPML_EN; |
| |
| rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME; |
| IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl); |
| |
| ixgbevf_rx_desc_queue_enable(adapter, ring); |
| ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring)); |
| } |
| |
| /** |
| * 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) |
| { |
| int i; |
| struct ixgbe_hw *hw = &adapter->hw; |
| struct net_device *netdev = adapter->netdev; |
| |
| ixgbevf_setup_psrtype(adapter); |
| if (hw->mac.type >= ixgbe_mac_X550_vf) |
| ixgbevf_setup_vfmrqc(adapter); |
| |
| /* notify the PF of our intent to use this size of frame */ |
| ixgbevf_rlpml_set_vf(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN); |
| |
| /* 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++) |
| ixgbevf_configure_rx_ring(adapter, adapter->rx_ring[i]); |
| } |
| |
| static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev, |
| __be16 proto, u16 vid) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| int err; |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| /* add VID to filter table */ |
| err = hw->mac.ops.set_vfta(hw, vid, 0, true); |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| |
| /* translate error return types so error makes sense */ |
| if (err == IXGBE_ERR_MBX) |
| return -EIO; |
| |
| if (err == IXGBE_ERR_INVALID_ARGUMENT) |
| return -EACCES; |
| |
| set_bit(vid, adapter->active_vlans); |
| |
| return err; |
| } |
| |
| static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, |
| __be16 proto, u16 vid) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| int err; |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| /* remove VID from filter table */ |
| err = hw->mac.ops.set_vfta(hw, vid, 0, false); |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| |
| clear_bit(vid, adapter->active_vlans); |
| |
| return err; |
| } |
| |
| static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter) |
| { |
| u16 vid; |
| |
| for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
| ixgbevf_vlan_rx_add_vid(adapter->netdev, |
| htons(ETH_P_8021Q), vid); |
| } |
| |
| static int ixgbevf_write_uc_addr_list(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| int count = 0; |
| |
| if ((netdev_uc_count(netdev)) > 10) { |
| pr_err("Too many unicast filters - No Space\n"); |
| return -ENOSPC; |
| } |
| |
| if (!netdev_uc_empty(netdev)) { |
| struct netdev_hw_addr *ha; |
| |
| netdev_for_each_uc_addr(ha, netdev) { |
| hw->mac.ops.set_uc_addr(hw, ++count, ha->addr); |
| udelay(200); |
| } |
| } else { |
| /* If the list is empty then send message to PF driver to |
| * clear all MAC VLANs on this VF. |
| */ |
| hw->mac.ops.set_uc_addr(hw, 0, NULL); |
| } |
| |
| return count; |
| } |
| |
| /** |
| * ixgbevf_set_rx_mode - Multicast and unicast set |
| * @netdev: network interface device structure |
| * |
| * The set_rx_method entry point is called whenever the multicast address |
| * list, unicast address list or the network interface flags are updated. |
| * This routine is responsible for configuring the hardware for proper |
| * multicast mode and configuring requested unicast filters. |
| **/ |
| static void ixgbevf_set_rx_mode(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| unsigned int flags = netdev->flags; |
| int xcast_mode; |
| |
| xcast_mode = (flags & IFF_ALLMULTI) ? IXGBEVF_XCAST_MODE_ALLMULTI : |
| (flags & (IFF_BROADCAST | IFF_MULTICAST)) ? |
| IXGBEVF_XCAST_MODE_MULTI : IXGBEVF_XCAST_MODE_NONE; |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| hw->mac.ops.update_xcast_mode(hw, netdev, xcast_mode); |
| |
| /* reprogram multicast list */ |
| hw->mac.ops.update_mc_addr_list(hw, netdev); |
| |
| ixgbevf_write_uc_addr_list(netdev); |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| } |
| |
| 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++) { |
| q_vector = adapter->q_vector[q_idx]; |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| ixgbevf_qv_init_lock(adapter->q_vector[q_idx]); |
| #endif |
| napi_enable(&q_vector->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]; |
| napi_disable(&q_vector->napi); |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| while (!ixgbevf_qv_disable(adapter->q_vector[q_idx])) { |
| pr_info("QV %d locked\n", q_idx); |
| usleep_range(1000, 20000); |
| } |
| #endif /* CONFIG_NET_RX_BUSY_POLL */ |
| } |
| } |
| |
| static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| unsigned int def_q = 0; |
| unsigned int num_tcs = 0; |
| unsigned int num_rx_queues = adapter->num_rx_queues; |
| unsigned int num_tx_queues = adapter->num_tx_queues; |
| int err; |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| /* fetch queue configuration from the PF */ |
| err = ixgbevf_get_queues(hw, &num_tcs, &def_q); |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| |
| if (err) |
| return err; |
| |
| if (num_tcs > 1) { |
| /* we need only one Tx queue */ |
| num_tx_queues = 1; |
| |
| /* update default Tx ring register index */ |
| adapter->tx_ring[0]->reg_idx = def_q; |
| |
| /* we need as many queues as traffic classes */ |
| num_rx_queues = num_tcs; |
| } |
| |
| /* if we have a bad config abort request queue reset */ |
| if ((adapter->num_rx_queues != num_rx_queues) || |
| (adapter->num_tx_queues != num_tx_queues)) { |
| /* force mailbox timeout to prevent further messages */ |
| hw->mbx.timeout = 0; |
| |
| /* wait for watchdog to come around and bail us out */ |
| adapter->flags |= IXGBEVF_FLAG_QUEUE_RESET_REQUESTED; |
| } |
| |
| return 0; |
| } |
| |
| static void ixgbevf_configure(struct ixgbevf_adapter *adapter) |
| { |
| ixgbevf_configure_dcb(adapter); |
| |
| ixgbevf_set_rx_mode(adapter->netdev); |
| |
| ixgbevf_restore_vlan(adapter); |
| |
| ixgbevf_configure_tx(adapter); |
| ixgbevf_configure_rx(adapter); |
| } |
| |
| 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 void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| int api[] = { ixgbe_mbox_api_12, |
| ixgbe_mbox_api_11, |
| ixgbe_mbox_api_10, |
| ixgbe_mbox_api_unknown }; |
| int err, idx = 0; |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| while (api[idx] != ixgbe_mbox_api_unknown) { |
| err = ixgbevf_negotiate_api_version(hw, api[idx]); |
| if (!err) |
| break; |
| idx++; |
| } |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| } |
| |
| static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| ixgbevf_configure_msix(adapter); |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| 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); |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| |
| smp_mb__before_atomic(); |
| clear_bit(__IXGBEVF_DOWN, &adapter->state); |
| ixgbevf_napi_enable_all(adapter); |
| |
| /* clear any pending interrupts, may auto mask */ |
| IXGBE_READ_REG(hw, IXGBE_VTEICR); |
| ixgbevf_irq_enable(adapter); |
| |
| /* enable transmits */ |
| netif_tx_start_all_queues(netdev); |
| |
| ixgbevf_save_reset_stats(adapter); |
| ixgbevf_init_last_counter_stats(adapter); |
| |
| hw->mac.get_link_status = 1; |
| mod_timer(&adapter->service_timer, jiffies); |
| } |
| |
| void ixgbevf_up(struct ixgbevf_adapter *adapter) |
| { |
| ixgbevf_configure(adapter); |
| |
| ixgbevf_up_complete(adapter); |
| } |
| |
| /** |
| * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue |
| * @rx_ring: ring to free buffers from |
| **/ |
| static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring) |
| { |
| struct device *dev = rx_ring->dev; |
| unsigned long size; |
| unsigned int i; |
| |
| /* Free Rx ring sk_buff */ |
| if (rx_ring->skb) { |
| dev_kfree_skb(rx_ring->skb); |
| rx_ring->skb = NULL; |
| } |
| |
| /* ring already cleared, nothing to do */ |
| if (!rx_ring->rx_buffer_info) |
| return; |
| |
| /* Free all the Rx ring pages */ |
| for (i = 0; i < rx_ring->count; i++) { |
| struct ixgbevf_rx_buffer *rx_buffer; |
| |
| rx_buffer = &rx_ring->rx_buffer_info[i]; |
| if (rx_buffer->dma) |
| dma_unmap_page(dev, rx_buffer->dma, |
| PAGE_SIZE, DMA_FROM_DEVICE); |
| rx_buffer->dma = 0; |
| if (rx_buffer->page) |
| __free_page(rx_buffer->page); |
| rx_buffer->page = NULL; |
| } |
| |
| 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); |
| } |
| |
| /** |
| * ixgbevf_clean_tx_ring - Free Tx Buffers |
| * @tx_ring: ring to be cleaned |
| **/ |
| static void ixgbevf_clean_tx_ring(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(tx_ring, 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); |
| } |
| |
| /** |
| * 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->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->tx_ring[i]); |
| } |
| |
| void ixgbevf_down(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct ixgbe_hw *hw = &adapter->hw; |
| int i; |
| |
| /* signal that we are down to the interrupt handler */ |
| if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state)) |
| return; /* do nothing if already down */ |
| |
| /* disable all enabled Rx queues */ |
| for (i = 0; i < adapter->num_rx_queues; i++) |
| ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]); |
| |
| usleep_range(10000, 20000); |
| |
| netif_tx_stop_all_queues(netdev); |
| |
| /* call carrier off first to avoid false dev_watchdog timeouts */ |
| netif_carrier_off(netdev); |
| netif_tx_disable(netdev); |
| |
| ixgbevf_irq_disable(adapter); |
| |
| ixgbevf_napi_disable_all(adapter); |
| |
| del_timer_sync(&adapter->service_timer); |
| |
| /* disable transmits in the hardware now that interrupts are off */ |
| for (i = 0; i < adapter->num_tx_queues; i++) { |
| u8 reg_idx = adapter->tx_ring[i]->reg_idx; |
| |
| IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), |
| IXGBE_TXDCTL_SWFLSH); |
| } |
| |
| 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) |
| { |
| WARN_ON(in_interrupt()); |
| |
| while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state)) |
| msleep(1); |
| |
| 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); |
| ixgbevf_negotiate_api(adapter); |
| } |
| |
| if (is_valid_ether_addr(adapter->hw.mac.addr)) { |
| ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr); |
| ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr); |
| } |
| |
| adapter->last_reset = jiffies; |
| } |
| |
| static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter, |
| int vectors) |
| { |
| int vector_threshold; |
| |
| /* We'll want at least 2 (vector_threshold): |
| * 1) TxQ[0] + RxQ[0] handler |
| * 2) 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. |
| */ |
| vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries, |
| vector_threshold, vectors); |
| |
| if (vectors < 0) { |
| dev_err(&adapter->pdev->dev, |
| "Unable to allocate MSI-X interrupts\n"); |
| kfree(adapter->msix_entries); |
| adapter->msix_entries = NULL; |
| return vectors; |
| } |
| |
| /* 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; |
| |
| return 0; |
| } |
| |
| /** |
| * ixgbevf_set_num_queues - Allocate queues for device, feature dependent |
| * @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) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| unsigned int def_q = 0; |
| unsigned int num_tcs = 0; |
| int err; |
| |
| /* Start with base case */ |
| adapter->num_rx_queues = 1; |
| adapter->num_tx_queues = 1; |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| /* fetch queue configuration from the PF */ |
| err = ixgbevf_get_queues(hw, &num_tcs, &def_q); |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| |
| if (err) |
| return; |
| |
| /* we need as many queues as traffic classes */ |
| if (num_tcs > 1) { |
| adapter->num_rx_queues = num_tcs; |
| } else { |
| u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES); |
| |
| switch (hw->api_version) { |
| case ixgbe_mbox_api_11: |
| case ixgbe_mbox_api_12: |
| adapter->num_rx_queues = rss; |
| adapter->num_tx_queues = rss; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * 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) |
| { |
| struct ixgbevf_ring *ring; |
| int rx = 0, tx = 0; |
| |
| for (; tx < adapter->num_tx_queues; tx++) { |
| ring = kzalloc(sizeof(*ring), GFP_KERNEL); |
| if (!ring) |
| goto err_allocation; |
| |
| ring->dev = &adapter->pdev->dev; |
| ring->netdev = adapter->netdev; |
| ring->count = adapter->tx_ring_count; |
| ring->queue_index = tx; |
| ring->reg_idx = tx; |
| |
| adapter->tx_ring[tx] = ring; |
| } |
| |
| for (; rx < adapter->num_rx_queues; rx++) { |
| ring = kzalloc(sizeof(*ring), GFP_KERNEL); |
| if (!ring) |
| goto err_allocation; |
| |
| ring->dev = &adapter->pdev->dev; |
| ring->netdev = adapter->netdev; |
| |
| ring->count = adapter->rx_ring_count; |
| ring->queue_index = rx; |
| ring->reg_idx = rx; |
| |
| adapter->rx_ring[rx] = ring; |
| } |
| |
| return 0; |
| |
| err_allocation: |
| while (tx) { |
| kfree(adapter->tx_ring[--tx]); |
| adapter->tx_ring[tx] = NULL; |
| } |
| |
| while (rx) { |
| kfree(adapter->rx_ring[--rx]); |
| adapter->rx_ring[rx] = NULL; |
| } |
| 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) |
| { |
| struct net_device *netdev = adapter->netdev; |
| int err; |
| 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) the same number of vectors as there are CPU's. |
| * The default is to use pairs of vectors. |
| */ |
| v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues); |
| v_budget = min_t(int, v_budget, num_online_cpus()); |
| v_budget += 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) |
| return -ENOMEM; |
| |
| for (vector = 0; vector < v_budget; vector++) |
| adapter->msix_entries[vector].entry = vector; |
| |
| err = ixgbevf_acquire_msix_vectors(adapter, v_budget); |
| if (err) |
| return err; |
| |
| err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues); |
| if (err) |
| return err; |
| |
| return netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues); |
| } |
| |
| /** |
| * 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; |
| |
| num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
| |
| 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; |
| netif_napi_add(adapter->netdev, &q_vector->napi, |
| ixgbevf_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]; |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| napi_hash_del(&q_vector->napi); |
| #endif |
| 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 = adapter->num_msix_vectors - NON_Q_VECTORS; |
| |
| 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; |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| napi_hash_del(&q_vector->napi); |
| #endif |
| 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; |
| } |
| |
| /** |
| * 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) { |
| pr_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_clear_interrupt_scheme - Clear the current interrupt scheme settings |
| * @adapter: board private structure to clear interrupt scheme on |
| * |
| * We go through and clear interrupt specific resources and reset the structure |
| * to pre-load conditions |
| **/ |
| static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter) |
| { |
| int i; |
| |
| for (i = 0; i < adapter->num_tx_queues; i++) { |
| kfree(adapter->tx_ring[i]); |
| adapter->tx_ring[i] = NULL; |
| } |
| for (i = 0; i < adapter->num_rx_queues; i++) { |
| kfree(adapter->rx_ring[i]); |
| adapter->rx_ring[i] = NULL; |
| } |
| |
| adapter->num_tx_queues = 0; |
| adapter->num_rx_queues = 0; |
| |
| ixgbevf_free_q_vectors(adapter); |
| ixgbevf_reset_interrupt_capability(adapter); |
| } |
| |
| /** |
| * ixgbevf_sw_init - Initialize general software structures |
| * @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 ixgbevf_sw_init(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| struct pci_dev *pdev = adapter->pdev; |
| struct net_device *netdev = adapter->netdev; |
| int err; |
| |
| /* PCI config space info */ |
| hw->vendor_id = pdev->vendor; |
| hw->device_id = pdev->device; |
| hw->revision_id = pdev->revision; |
| hw->subsystem_vendor_id = pdev->subsystem_vendor; |
| hw->subsystem_device_id = pdev->subsystem_device; |
| |
| hw->mbx.ops.init_params(hw); |
| |
| /* assume legacy case in which PF would only give VF 2 queues */ |
| hw->mac.max_tx_queues = 2; |
| hw->mac.max_rx_queues = 2; |
| |
| /* lock to protect mailbox accesses */ |
| spin_lock_init(&adapter->mbx_lock); |
| |
| err = hw->mac.ops.reset_hw(hw); |
| if (err) { |
| dev_info(&pdev->dev, |
| "PF still in reset state. Is the PF interface up?\n"); |
| } else { |
| err = hw->mac.ops.init_hw(hw); |
| if (err) { |
| pr_err("init_shared_code failed: %d\n", err); |
| goto out; |
| } |
| ixgbevf_negotiate_api(adapter); |
| err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr); |
| if (err) |
| dev_info(&pdev->dev, "Error reading MAC address\n"); |
| else if (is_zero_ether_addr(adapter->hw.mac.addr)) |
| dev_info(&pdev->dev, |
| "MAC address not assigned by administrator.\n"); |
| ether_addr_copy(netdev->dev_addr, hw->mac.addr); |
| } |
| |
| if (!is_valid_ether_addr(netdev->dev_addr)) { |
| dev_info(&pdev->dev, "Assigning random MAC address\n"); |
| eth_hw_addr_random(netdev); |
| ether_addr_copy(hw->mac.addr, netdev->dev_addr); |
| ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr); |
| } |
| |
| /* Enable dynamic interrupt throttling rates */ |
| adapter->rx_itr_setting = 1; |
| adapter->tx_itr_setting = 1; |
| |
| /* set default ring sizes */ |
| adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD; |
| adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD; |
| |
| set_bit(__IXGBEVF_DOWN, &adapter->state); |
| return 0; |
| |
| 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; |
| int i; |
| |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state) || |
| test_bit(__IXGBEVF_RESETTING, &adapter->state)) |
| return; |
| |
| 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); |
| |
| for (i = 0; i < adapter->num_rx_queues; i++) { |
| adapter->hw_csum_rx_error += |
| adapter->rx_ring[i]->hw_csum_rx_error; |
| adapter->rx_ring[i]->hw_csum_rx_error = 0; |
| } |
| } |
| |
| /** |
| * ixgbevf_service_timer - Timer Call-back |
| * @data: pointer to adapter cast into an unsigned long |
| **/ |
| static void ixgbevf_service_timer(unsigned long data) |
| { |
| struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data; |
| |
| /* Reset the timer */ |
| mod_timer(&adapter->service_timer, (HZ * 2) + jiffies); |
| |
| ixgbevf_service_event_schedule(adapter); |
| } |
| |
| static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter) |
| { |
| if (!(adapter->flags & IXGBEVF_FLAG_RESET_REQUESTED)) |
| return; |
| |
| adapter->flags &= ~IXGBEVF_FLAG_RESET_REQUESTED; |
| |
| /* 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_check_hang_subtask - check for hung queues and dropped interrupts |
| * @adapter: pointer to the device adapter structure |
| * |
| * This function serves two purposes. First it strobes the interrupt lines |
| * in order to make certain interrupts are occurring. Secondly it sets the |
| * bits needed to check for TX hangs. As a result we should immediately |
| * determine if a hang has occurred. |
| **/ |
| static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 eics = 0; |
| int i; |
| |
| /* If we're down or resetting, just bail */ |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state) || |
| test_bit(__IXGBEVF_RESETTING, &adapter->state)) |
| return; |
| |
| /* Force detection of hung controller */ |
| if (netif_carrier_ok(adapter->netdev)) { |
| for (i = 0; i < adapter->num_tx_queues; i++) |
| set_check_for_tx_hang(adapter->tx_ring[i]); |
| } |
| |
| /* 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->rx.ring || qv->tx.ring) |
| eics |= 1 << i; |
| } |
| |
| /* Cause software interrupt to ensure rings are cleaned */ |
| IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics); |
| } |
| |
| /** |
| * ixgbevf_watchdog_update_link - update the link status |
| * @adapter: pointer to the device adapter structure |
| **/ |
| static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter) |
| { |
| struct ixgbe_hw *hw = &adapter->hw; |
| u32 link_speed = adapter->link_speed; |
| bool link_up = adapter->link_up; |
| s32 err; |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false); |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| |
| /* if check for link returns error we will need to reset */ |
| if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) { |
| adapter->flags |= IXGBEVF_FLAG_RESET_REQUESTED; |
| link_up = false; |
| } |
| |
| adapter->link_up = link_up; |
| adapter->link_speed = link_speed; |
| } |
| |
| /** |
| * ixgbevf_watchdog_link_is_up - update netif_carrier status and |
| * print link up message |
| * @adapter: pointer to the device adapter structure |
| **/ |
| static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| |
| /* only continue if link was previously down */ |
| if (netif_carrier_ok(netdev)) |
| return; |
| |
| dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n", |
| (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ? |
| "10 Gbps" : |
| (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ? |
| "1 Gbps" : |
| (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ? |
| "100 Mbps" : |
| "unknown speed"); |
| |
| netif_carrier_on(netdev); |
| } |
| |
| /** |
| * ixgbevf_watchdog_link_is_down - update netif_carrier status and |
| * print link down message |
| * @adapter: pointer to the adapter structure |
| **/ |
| static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| |
| adapter->link_speed = 0; |
| |
| /* only continue if link was up previously */ |
| if (!netif_carrier_ok(netdev)) |
| return; |
| |
| dev_info(&adapter->pdev->dev, "NIC Link is Down\n"); |
| |
| netif_carrier_off(netdev); |
| } |
| |
| /** |
| * ixgbevf_watchdog_subtask - worker thread to bring link up |
| * @work: pointer to work_struct containing our data |
| **/ |
| static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter) |
| { |
| /* if interface is down do nothing */ |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state) || |
| test_bit(__IXGBEVF_RESETTING, &adapter->state)) |
| return; |
| |
| ixgbevf_watchdog_update_link(adapter); |
| |
| if (adapter->link_up) |
| ixgbevf_watchdog_link_is_up(adapter); |
| else |
| ixgbevf_watchdog_link_is_down(adapter); |
| |
| ixgbevf_update_stats(adapter); |
| } |
| |
| /** |
| * ixgbevf_service_task - manages and runs subtasks |
| * @work: pointer to work_struct containing our data |
| **/ |
| static void ixgbevf_service_task(struct work_struct *work) |
| { |
| struct ixgbevf_adapter *adapter = container_of(work, |
| struct ixgbevf_adapter, |
| service_task); |
| struct ixgbe_hw *hw = &adapter->hw; |
| |
| if (IXGBE_REMOVED(hw->hw_addr)) { |
| if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) { |
| rtnl_lock(); |
| ixgbevf_down(adapter); |
| rtnl_unlock(); |
| } |
| return; |
| } |
| |
| ixgbevf_queue_reset_subtask(adapter); |
| ixgbevf_reset_subtask(adapter); |
| ixgbevf_watchdog_subtask(adapter); |
| ixgbevf_check_hang_subtask(adapter); |
| |
| ixgbevf_service_event_complete(adapter); |
| } |
| |
| /** |
| * ixgbevf_free_tx_resources - Free Tx Resources per Queue |
| * @tx_ring: Tx descriptor ring for a specific queue |
| * |
| * Free all transmit software resources |
| **/ |
| void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring) |
| { |
| ixgbevf_clean_tx_ring(tx_ring); |
| |
| vfree(tx_ring->tx_buffer_info); |
| tx_ring->tx_buffer_info = NULL; |
| |
| /* if not set, then don't free */ |
| if (!tx_ring->desc) |
| return; |
| |
| dma_free_coherent(tx_ring->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->tx_ring[i]); |
| } |
| |
| /** |
| * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors) |
| * @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_ring *tx_ring) |
| { |
| int size; |
| |
| size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count; |
| tx_ring->tx_buffer_info = vzalloc(size); |
| if (!tx_ring->tx_buffer_info) |
| goto err; |
| |
| /* 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(tx_ring->dev, tx_ring->size, |
| &tx_ring->dma, GFP_KERNEL); |
| if (!tx_ring->desc) |
| goto err; |
| |
| 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->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) |
| * @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_ring *rx_ring) |
| { |
| int size; |
| |
| size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count; |
| rx_ring->rx_buffer_info = vzalloc(size); |
| if (!rx_ring->rx_buffer_info) |
| goto err; |
| |
| /* 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(rx_ring->dev, rx_ring->size, |
| &rx_ring->dma, GFP_KERNEL); |
| |
| if (!rx_ring->desc) |
| goto err; |
| |
| return 0; |
| err: |
| vfree(rx_ring->rx_buffer_info); |
| rx_ring->rx_buffer_info = NULL; |
| dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n"); |
| 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->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 |
| * @rx_ring: ring to clean the resources from |
| * |
| * Free all receive software resources |
| **/ |
| void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring) |
| { |
| ixgbevf_clean_rx_ring(rx_ring); |
| |
| vfree(rx_ring->rx_buffer_info); |
| rx_ring->rx_buffer_info = NULL; |
| |
| dma_free_coherent(rx_ring->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->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. |
| **/ |
| int ixgbevf_open(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| struct ixgbe_hw *hw = &adapter->hw; |
| int err; |
| |
| /* A previous failure to open the device because of a lack of |
| * available MSIX vector resources may have reset the number |
| * of msix vectors variable to zero. The only way to recover |
| * is to unload/reload the driver and hope that the system has |
| * been able to recover some MSIX vector resources. |
| */ |
| if (!adapter->num_msix_vectors) |
| return -ENOMEM; |
| |
| 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; |
| pr_err("Unable to start - perhaps the PF Driver isn't up yet\n"); |
| goto err_setup_reset; |
| } |
| } |
| |
| /* disallow open during test */ |
| if (test_bit(__IXGBEVF_TESTING, &adapter->state)) |
| return -EBUSY; |
| |
| netif_carrier_off(netdev); |
| |
| /* 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_request_irq(adapter); |
| if (err) |
| goto err_req_irq; |
| |
| ixgbevf_up_complete(adapter); |
| |
| return 0; |
| |
| err_req_irq: |
| ixgbevf_down(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. |
| **/ |
| 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 void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter) |
| { |
| struct net_device *dev = adapter->netdev; |
| |
| if (!(adapter->flags & IXGBEVF_FLAG_QUEUE_RESET_REQUESTED)) |
| return; |
| |
| adapter->flags &= ~IXGBEVF_FLAG_QUEUE_RESET_REQUESTED; |
| |
| /* if interface is down do nothing */ |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state) || |
| test_bit(__IXGBEVF_RESETTING, &adapter->state)) |
| return; |
| |
| /* Hardware has to reinitialize queues and interrupts to |
| * match packet buffer alignment. Unfortunately, the |
| * hardware is not flexible enough to do this dynamically. |
| */ |
| if (netif_running(dev)) |
| ixgbevf_close(dev); |
| |
| ixgbevf_clear_interrupt_scheme(adapter); |
| ixgbevf_init_interrupt_scheme(adapter); |
| |
| if (netif_running(dev)) |
| ixgbevf_open(dev); |
| } |
| |
| static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring, |
| u32 vlan_macip_lens, u32 type_tucmd, |
| u32 mss_l4len_idx) |
| { |
| struct ixgbe_adv_tx_context_desc *context_desc; |
| u16 i = tx_ring->next_to_use; |
| |
| context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i); |
| |
| i++; |
| tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; |
| |
| /* set bits to identify this as an advanced context descriptor */ |
| type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT; |
| |
| context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); |
| context_desc->seqnum_seed = 0; |
| context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); |
| context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); |
| } |
| |
| static int ixgbevf_tso(struct ixgbevf_ring *tx_ring, |
| struct ixgbevf_tx_buffer *first, |
| u8 *hdr_len) |
| { |
| struct sk_buff *skb = first->skb; |
| u32 vlan_macip_lens, type_tucmd; |
| u32 mss_l4len_idx, l4len; |
| int err; |
| |
| if (skb->ip_summed != CHECKSUM_PARTIAL) |
| return 0; |
| |
| if (!skb_is_gso(skb)) |
| return 0; |
| |
| err = skb_cow_head(skb, 0); |
| if (err < 0) |
| return err; |
| |
| /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ |
| type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP; |
| |
| if (first->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); |
| type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; |
| first->tx_flags |= IXGBE_TX_FLAGS_TSO | |
| IXGBE_TX_FLAGS_CSUM | |
| IXGBE_TX_FLAGS_IPV4; |
| } 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); |
| first->tx_flags |= IXGBE_TX_FLAGS_TSO | |
| IXGBE_TX_FLAGS_CSUM; |
| } |
| |
| /* compute header lengths */ |
| l4len = tcp_hdrlen(skb); |
| *hdr_len += l4len; |
| *hdr_len = skb_transport_offset(skb) + l4len; |
| |
| /* update GSO size and bytecount with header size */ |
| first->gso_segs = skb_shinfo(skb)->gso_segs; |
| first->bytecount += (first->gso_segs - 1) * *hdr_len; |
| |
| /* mss_l4len_id: use 1 as index for TSO */ |
| mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT; |
| mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT; |
| mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT; |
| |
| /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */ |
| vlan_macip_lens = skb_network_header_len(skb); |
| vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT; |
| vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; |
| |
| ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, |
| type_tucmd, mss_l4len_idx); |
| |
| return 1; |
| } |
| |
| static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring, |
| struct ixgbevf_tx_buffer *first) |
| { |
| struct sk_buff *skb = first->skb; |
| u32 vlan_macip_lens = 0; |
| u32 mss_l4len_idx = 0; |
| u32 type_tucmd = 0; |
| |
| if (skb->ip_summed == CHECKSUM_PARTIAL) { |
| u8 l4_hdr = 0; |
| __be16 frag_off; |
| |
| switch (first->protocol) { |
| case htons(ETH_P_IP): |
| vlan_macip_lens |= skb_network_header_len(skb); |
| type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4; |
| l4_hdr = ip_hdr(skb)->protocol; |
| break; |
| case htons(ETH_P_IPV6): |
| vlan_macip_lens |= skb_network_header_len(skb); |
| l4_hdr = ipv6_hdr(skb)->nexthdr; |
| if (likely(skb_network_header_len(skb) == |
| sizeof(struct ipv6hdr))) |
| break; |
| ipv6_skip_exthdr(skb, skb_network_offset(skb) + |
| sizeof(struct ipv6hdr), |
| &l4_hdr, &frag_off); |
| if (unlikely(frag_off)) |
| l4_hdr = NEXTHDR_FRAGMENT; |
| break; |
| default: |
| break; |
| } |
| |
| switch (l4_hdr) { |
| case IPPROTO_TCP: |
| type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP; |
| mss_l4len_idx = tcp_hdrlen(skb) << |
| IXGBE_ADVTXD_L4LEN_SHIFT; |
| break; |
| case IPPROTO_SCTP: |
| type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP; |
| mss_l4len_idx = sizeof(struct sctphdr) << |
| IXGBE_ADVTXD_L4LEN_SHIFT; |
| break; |
| case IPPROTO_UDP: |
| mss_l4len_idx = sizeof(struct udphdr) << |
| IXGBE_ADVTXD_L4LEN_SHIFT; |
| break; |
| default: |
| if (unlikely(net_ratelimit())) { |
| dev_warn(tx_ring->dev, |
| "partial checksum, l3 proto=%x, l4 proto=%x\n", |
| first->protocol, l4_hdr); |
| } |
| skb_checksum_help(skb); |
| goto no_csum; |
| } |
| |
| /* update TX checksum flag */ |
| first->tx_flags |= IXGBE_TX_FLAGS_CSUM; |
| } |
| |
| no_csum: |
| /* vlan_macip_lens: MACLEN, VLAN tag */ |
| vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT; |
| vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK; |
| |
| ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, |
| type_tucmd, mss_l4len_idx); |
| } |
| |
| static __le32 ixgbevf_tx_cmd_type(u32 tx_flags) |
| { |
| /* set type for advanced descriptor with frame checksum insertion */ |
| __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA | |
| IXGBE_ADVTXD_DCMD_IFCS | |
| IXGBE_ADVTXD_DCMD_DEXT); |
| |
| /* set HW VLAN bit if VLAN is present */ |
| if (tx_flags & IXGBE_TX_FLAGS_VLAN) |
| cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE); |
| |
| /* set segmentation enable bits for TSO/FSO */ |
| if (tx_flags & IXGBE_TX_FLAGS_TSO) |
| cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE); |
| |
| return cmd_type; |
| } |
| |
| static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc, |
| u32 tx_flags, unsigned int paylen) |
| { |
| __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT); |
| |
| /* enable L4 checksum for TSO and TX checksum offload */ |
| if (tx_flags & IXGBE_TX_FLAGS_CSUM) |
| olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM); |
| |
| /* enble IPv4 checksum for TSO */ |
| if (tx_flags & IXGBE_TX_FLAGS_IPV4) |
| olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM); |
| |
| /* use index 1 context for TSO/FSO/FCOE */ |
| if (tx_flags & IXGBE_TX_FLAGS_TSO) |
| olinfo_status |= cpu_to_le32(1 << IXGBE_ADVTXD_IDX_SHIFT); |
| |
| /* Check Context must be set if Tx switch is enabled, which it |
| * always is for case where virtual functions are running |
| */ |
| olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC); |
| |
| tx_desc->read.olinfo_status = olinfo_status; |
| } |
| |
| static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring, |
| struct ixgbevf_tx_buffer *first, |
| const u8 hdr_len) |
| { |
| dma_addr_t dma; |
| struct sk_buff *skb = first->skb; |
| struct ixgbevf_tx_buffer *tx_buffer; |
| union ixgbe_adv_tx_desc *tx_desc; |
| struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0]; |
| unsigned int data_len = skb->data_len; |
| unsigned int size = skb_headlen(skb); |
| unsigned int paylen = skb->len - hdr_len; |
| u32 tx_flags = first->tx_flags; |
| __le32 cmd_type; |
| u16 i = tx_ring->next_to_use; |
| |
| tx_desc = IXGBEVF_TX_DESC(tx_ring, i); |
| |
| ixgbevf_tx_olinfo_status(tx_desc, tx_flags, paylen); |
| cmd_type = ixgbevf_tx_cmd_type(tx_flags); |
| |
| dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE); |
| if (dma_mapping_error(tx_ring->dev, dma)) |
| goto dma_error; |
| |
| /* record length, and DMA address */ |
| dma_unmap_len_set(first, len, size); |
| dma_unmap_addr_set(first, dma, dma); |
| |
| tx_desc->read.buffer_addr = cpu_to_le64(dma); |
| |
| for (;;) { |
| while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) { |
| tx_desc->read.cmd_type_len = |
| cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD); |
| |
| i++; |
| tx_desc++; |
| if (i == tx_ring->count) { |
| tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); |
| i = 0; |
| } |
| |
| dma += IXGBE_MAX_DATA_PER_TXD; |
| size -= IXGBE_MAX_DATA_PER_TXD; |
| |
| tx_desc->read.buffer_addr = cpu_to_le64(dma); |
| tx_desc->read.olinfo_status = 0; |
| } |
| |
| if (likely(!data_len)) |
| break; |
| |
| tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size); |
| |
| i++; |
| tx_desc++; |
| if (i == tx_ring->count) { |
| tx_desc = IXGBEVF_TX_DESC(tx_ring, 0); |
| i = 0; |
| } |
| |
| size = skb_frag_size(frag); |
| data_len -= size; |
| |
| dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size, |
| DMA_TO_DEVICE); |
| if (dma_mapping_error(tx_ring->dev, dma)) |
| goto dma_error; |
| |
| tx_buffer = &tx_ring->tx_buffer_info[i]; |
| dma_unmap_len_set(tx_buffer, len, size); |
| dma_unmap_addr_set(tx_buffer, dma, dma); |
| |
| tx_desc->read.buffer_addr = cpu_to_le64(dma); |
| tx_desc->read.olinfo_status = 0; |
| |
| frag++; |
| } |
| |
| /* write last descriptor with RS and EOP bits */ |
| cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD); |
| tx_desc->read.cmd_type_len = cmd_type; |
| |
| /* set the timestamp */ |
| first->time_stamp = jiffies; |
| |
| /* 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). |
| * |
| * We also need this memory barrier (wmb) to make certain all of the |
| * status bits have been updated before next_to_watch is written. |
| */ |
| wmb(); |
| |
| /* set next_to_watch value indicating a packet is present */ |
| first->next_to_watch = tx_desc; |
| |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| |
| tx_ring->next_to_use = i; |
| |
| /* notify HW of packet */ |
| ixgbevf_write_tail(tx_ring, i); |
| |
| return; |
| dma_error: |
| dev_err(tx_ring->dev, "TX DMA map failed\n"); |
| |
| /* clear dma mappings for failed tx_buffer_info map */ |
| for (;;) { |
| tx_buffer = &tx_ring->tx_buffer_info[i]; |
| ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer); |
| if (tx_buffer == first) |
| break; |
| if (i == 0) |
| i = tx_ring->count; |
| i--; |
| } |
| |
| tx_ring->next_to_use = i; |
| } |
| |
| static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size) |
| { |
| netif_stop_subqueue(tx_ring->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(ixgbevf_desc_unused(tx_ring) < size)) |
| return -EBUSY; |
| |
| /* A reprieve! - use start_queue because it doesn't call schedule */ |
| netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index); |
| ++tx_ring->tx_stats.restart_queue; |
| |
| return 0; |
| } |
| |
| static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size) |
| { |
| if (likely(ixgbevf_desc_unused(tx_ring) >= size)) |
| return 0; |
| return __ixgbevf_maybe_stop_tx(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_tx_buffer *first; |
| struct ixgbevf_ring *tx_ring; |
| int tso; |
| u32 tx_flags = 0; |
| u16 count = TXD_USE_COUNT(skb_headlen(skb)); |
| #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD |
| unsigned short f; |
| #endif |
| u8 hdr_len = 0; |
| u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL); |
| |
| if (!dst_mac || is_link_local_ether_addr(dst_mac)) { |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| tx_ring = adapter->tx_ring[skb->queue_mapping]; |
| |
| /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD, |
| * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD, |
| * + 2 desc gap to keep tail from touching head, |
| * + 1 desc for context descriptor, |
| * otherwise try next time |
| */ |
| #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD |
| for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) |
| count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); |
| #else |
| count += skb_shinfo(skb)->nr_frags; |
| #endif |
| if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) { |
| tx_ring->tx_stats.tx_busy++; |
| return NETDEV_TX_BUSY; |
| } |
| |
| /* record the location of the first descriptor for this packet */ |
| first = &tx_ring->tx_buffer_info[tx_ring->next_to_use]; |
| first->skb = skb; |
| first->bytecount = skb->len; |
| first->gso_segs = 1; |
| |
| if (skb_vlan_tag_present(skb)) { |
| tx_flags |= skb_vlan_tag_get(skb); |
| tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT; |
| tx_flags |= IXGBE_TX_FLAGS_VLAN; |
| } |
| |
| /* record initial flags and protocol */ |
| first->tx_flags = tx_flags; |
| first->protocol = vlan_get_protocol(skb); |
| |
| tso = ixgbevf_tso(tx_ring, first, &hdr_len); |
| if (tso < 0) |
| goto out_drop; |
| else if (!tso) |
| ixgbevf_tx_csum(tx_ring, first); |
| |
| ixgbevf_tx_map(tx_ring, first, hdr_len); |
| |
| ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED); |
| |
| return NETDEV_TX_OK; |
| |
| out_drop: |
| dev_kfree_skb_any(first->skb); |
| first->skb = NULL; |
| |
| return NETDEV_TX_OK; |
| } |
| |
| /** |
| * 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; |
| int err; |
| |
| if (!is_valid_ether_addr(addr->sa_data)) |
| return -EADDRNOTAVAIL; |
| |
| spin_lock_bh(&adapter->mbx_lock); |
| |
| err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0); |
| |
| spin_unlock_bh(&adapter->mbx_lock); |
| |
| if (err) |
| return -EPERM; |
| |
| ether_addr_copy(hw->mac.addr, addr->sa_data); |
| ether_addr_copy(netdev->dev_addr, addr->sa_data); |
| |
| 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); |
| struct ixgbe_hw *hw = &adapter->hw; |
| int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; |
| int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE; |
| |
| switch (adapter->hw.api_version) { |
| case ixgbe_mbox_api_11: |
| case ixgbe_mbox_api_12: |
| max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE; |
| break; |
| default: |
| if (adapter->hw.mac.type != ixgbe_mac_82599_vf) |
| max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE; |
| break; |
| } |
| |
| /* MTU < 68 is an error and causes problems on some kernels */ |
| if ((new_mtu < 68) || (max_frame > max_possible_frame)) |
| return -EINVAL; |
| |
| hw_dbg(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; |
| |
| /* notify the PF of our intent to use this size of frame */ |
| ixgbevf_rlpml_set_vf(hw, max_frame); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| /* Polling 'interrupt' - used by things like netconsole to send skbs |
| * without having to re-enable interrupts. It's not called while |
| * the interrupt routine is executing. |
| */ |
| static void ixgbevf_netpoll(struct net_device *netdev) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| int i; |
| |
| /* if interface is down do nothing */ |
| if (test_bit(__IXGBEVF_DOWN, &adapter->state)) |
| return; |
| for (i = 0; i < adapter->num_rx_queues; i++) |
| ixgbevf_msix_clean_rings(0, adapter->q_vector[i]); |
| } |
| #endif /* CONFIG_NET_POLL_CONTROLLER */ |
| |
| static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| #ifdef CONFIG_PM |
| int retval = 0; |
| #endif |
| |
| netif_device_detach(netdev); |
| |
| if (netif_running(netdev)) { |
| rtnl_lock(); |
| ixgbevf_down(adapter); |
| ixgbevf_free_irq(adapter); |
| ixgbevf_free_all_tx_resources(adapter); |
| ixgbevf_free_all_rx_resources(adapter); |
| rtnl_unlock(); |
| } |
| |
| ixgbevf_clear_interrupt_scheme(adapter); |
| |
| #ifdef CONFIG_PM |
| retval = pci_save_state(pdev); |
| if (retval) |
| return retval; |
| |
| #endif |
| if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state)) |
| pci_disable_device(pdev); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int ixgbevf_resume(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| u32 err; |
| |
| pci_restore_state(pdev); |
| /* pci_restore_state clears dev->state_saved so call |
| * pci_save_state to restore it. |
| */ |
| pci_save_state(pdev); |
| |
| err = pci_enable_device_mem(pdev); |
| if (err) { |
| dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); |
| return err; |
| } |
| smp_mb__before_atomic(); |
| clear_bit(__IXGBEVF_DISABLED, &adapter->state); |
| pci_set_master(pdev); |
| |
| ixgbevf_reset(adapter); |
| |
| rtnl_lock(); |
| err = ixgbevf_init_interrupt_scheme(adapter); |
| rtnl_unlock(); |
| if (err) { |
| dev_err(&pdev->dev, "Cannot initialize interrupts\n"); |
| return err; |
| } |
| |
| if (netif_running(netdev)) { |
| err = ixgbevf_open(netdev); |
| if (err) |
| return err; |
| } |
| |
| netif_device_attach(netdev); |
| |
| return err; |
| } |
| |
| #endif /* CONFIG_PM */ |
| static void ixgbevf_shutdown(struct pci_dev *pdev) |
| { |
| ixgbevf_suspend(pdev, PMSG_SUSPEND); |
| } |
| |
| static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev, |
| struct rtnl_link_stats64 *stats) |
| { |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| unsigned int start; |
| u64 bytes, packets; |
| const struct ixgbevf_ring *ring; |
| int i; |
| |
| ixgbevf_update_stats(adapter); |
| |
| stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc; |
| |
| for (i = 0; i < adapter->num_rx_queues; i++) { |
| ring = adapter->rx_ring[i]; |
| do { |
| start = u64_stats_fetch_begin_irq(&ring->syncp); |
| bytes = ring->stats.bytes; |
| packets = ring->stats.packets; |
| } while (u64_stats_fetch_retry_irq(&ring->syncp, start)); |
| stats->rx_bytes += bytes; |
| stats->rx_packets += packets; |
| } |
| |
| for (i = 0; i < adapter->num_tx_queues; i++) { |
| ring = adapter->tx_ring[i]; |
| do { |
| start = u64_stats_fetch_begin_irq(&ring->syncp); |
| bytes = ring->stats.bytes; |
| packets = ring->stats.packets; |
| } while (u64_stats_fetch_retry_irq(&ring->syncp, start)); |
| stats->tx_bytes += bytes; |
| stats->tx_packets += packets; |
| } |
| |
| return stats; |
| } |
| |
| static const struct net_device_ops ixgbevf_netdev_ops = { |
| .ndo_open = ixgbevf_open, |
| .ndo_stop = ixgbevf_close, |
| .ndo_start_xmit = ixgbevf_xmit_frame, |
| .ndo_set_rx_mode = ixgbevf_set_rx_mode, |
| .ndo_get_stats64 = ixgbevf_get_stats, |
| .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_add_vid = ixgbevf_vlan_rx_add_vid, |
| .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid, |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| .ndo_busy_poll = ixgbevf_busy_poll_recv, |
| #endif |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = ixgbevf_netpoll, |
| #endif |
| .ndo_features_check = passthru_features_check, |
| }; |
| |
| static void ixgbevf_assign_netdev_ops(struct net_device *dev) |
| { |
| dev->netdev_ops = &ixgbevf_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 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]; |
| int err, pci_using_dac; |
| bool disable_dev = false; |
| |
| err = pci_enable_device(pdev); |
| if (err) |
| return err; |
| |
| if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { |
| pci_using_dac = 1; |
| } else { |
| err = dma_set_mask_and_coherent(&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); |
| |
| netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter), |
| MAX_TX_QUEUES); |
| if (!netdev) { |
| err = -ENOMEM; |
| goto err_alloc_etherdev; |
| } |
| |
| SET_NETDEV_DEV(netdev, &pdev->dev); |
| |
| adapter = netdev_priv(netdev); |
| |
| adapter->netdev = netdev; |
| adapter->pdev = pdev; |
| hw = &adapter->hw; |
| hw->back = adapter; |
| adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); |
| |
| /* 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)); |
| adapter->io_addr = hw->hw_addr; |
| if (!hw->hw_addr) { |
| err = -EIO; |
| goto err_ioremap; |
| } |
| |
| ixgbevf_assign_netdev_ops(netdev); |
| |
| /* 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_mbx_operations)); |
| |
| /* setup the private structure */ |
| err = ixgbevf_sw_init(adapter); |
| if (err) |
| goto err_sw_init; |
| |
| /* The HW MAC address was set and/or determined in sw_init */ |
| if (!is_valid_ether_addr(netdev->dev_addr)) { |
| pr_err("invalid MAC address\n"); |
| err = -EIO; |
| goto err_sw_init; |
| } |
| |
| netdev->hw_features = NETIF_F_SG | |
| NETIF_F_IP_CSUM | |
| NETIF_F_IPV6_CSUM | |
| NETIF_F_TSO | |
| NETIF_F_TSO6 | |
| NETIF_F_RXCSUM; |
| |
| netdev->features = netdev->hw_features | |
| NETIF_F_HW_VLAN_CTAG_TX | |
| NETIF_F_HW_VLAN_CTAG_RX | |
| NETIF_F_HW_VLAN_CTAG_FILTER; |
| |
| netdev->vlan_features |= NETIF_F_TSO | |
| NETIF_F_TSO6 | |
| NETIF_F_IP_CSUM | |
| NETIF_F_IPV6_CSUM | |
| NETIF_F_SG; |
| |
| if (pci_using_dac) |
| netdev->features |= NETIF_F_HIGHDMA; |
| |
| netdev->priv_flags |= IFF_UNICAST_FLT; |
| |
| if (IXGBE_REMOVED(hw->hw_addr)) { |
| err = -EIO; |
| goto err_sw_init; |
| } |
| |
| setup_timer(&adapter->service_timer, &ixgbevf_service_timer, |
| (unsigned long)adapter); |
| |
| INIT_WORK(&adapter->service_task, ixgbevf_service_task); |
| set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state); |
| clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state); |
| |
| err = ixgbevf_init_interrupt_scheme(adapter); |
| if (err) |
| goto err_sw_init; |
| |
| strcpy(netdev->name, "eth%d"); |
| |
| err = register_netdev(netdev); |
| if (err) |
| goto err_register; |
| |
| pci_set_drvdata(pdev, netdev); |
| netif_carrier_off(netdev); |
| |
| ixgbevf_init_last_counter_stats(adapter); |
| |
| /* print the VF info */ |
| dev_info(&pdev->dev, "%pM\n", netdev->dev_addr); |
| dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type); |
| |
| switch (hw->mac.type) { |
| case ixgbe_mac_X550_vf: |
| dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n"); |
| break; |
| case ixgbe_mac_X540_vf: |
| dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n"); |
| break; |
| case ixgbe_mac_82599_vf: |
| default: |
| dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n"); |
| break; |
| } |
| |
| return 0; |
| |
| err_register: |
| ixgbevf_clear_interrupt_scheme(adapter); |
| err_sw_init: |
| ixgbevf_reset_interrupt_capability(adapter); |
| iounmap(adapter->io_addr); |
| err_ioremap: |
| disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state); |
| free_netdev(netdev); |
| err_alloc_etherdev: |
| pci_release_regions(pdev); |
| err_pci_reg: |
| err_dma: |
| if (!adapter || disable_dev) |
| 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 ixgbevf_remove(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgbevf_adapter *adapter; |
| bool disable_dev; |
| |
| if (!netdev) |
| return; |
| |
| adapter = netdev_priv(netdev); |
| |
| set_bit(__IXGBEVF_REMOVING, &adapter->state); |
| cancel_work_sync(&adapter->service_task); |
| |
| if (netdev->reg_state == NETREG_REGISTERED) |
| unregister_netdev(netdev); |
| |
| ixgbevf_clear_interrupt_scheme(adapter); |
| ixgbevf_reset_interrupt_capability(adapter); |
| |
| iounmap(adapter->io_addr); |
| pci_release_regions(pdev); |
| |
| hw_dbg(&adapter->hw, "Remove complete\n"); |
| |
| disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state); |
| free_netdev(netdev); |
| |
| if (disable_dev) |
| pci_disable_device(pdev); |
| } |
| |
| /** |
| * ixgbevf_io_error_detected - called when PCI error is detected |
| * @pdev: Pointer to PCI device |
| * @state: The current pci connection state |
| * |
| * This function is called after a PCI bus error affecting |
| * this device has been detected. |
| **/ |
| static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev, |
| pci_channel_state_t state) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| |
| if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state)) |
| return PCI_ERS_RESULT_DISCONNECT; |
| |
| rtnl_lock(); |
| netif_device_detach(netdev); |
| |
| if (state == pci_channel_io_perm_failure) { |
| rtnl_unlock(); |
| return PCI_ERS_RESULT_DISCONNECT; |
| } |
| |
| if (netif_running(netdev)) |
| ixgbevf_down(adapter); |
| |
| if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state)) |
| pci_disable_device(pdev); |
| rtnl_unlock(); |
| |
| /* Request a slot slot reset. */ |
| return PCI_ERS_RESULT_NEED_RESET; |
| } |
| |
| /** |
| * ixgbevf_io_slot_reset - called after the pci bus has been reset. |
| * @pdev: Pointer to PCI device |
| * |
| * Restart the card from scratch, as if from a cold-boot. Implementation |
| * resembles the first-half of the ixgbevf_resume routine. |
| **/ |
| static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| |
| if (pci_enable_device_mem(pdev)) { |
| dev_err(&pdev->dev, |
| "Cannot re-enable PCI device after reset.\n"); |
| return PCI_ERS_RESULT_DISCONNECT; |
| } |
| |
| smp_mb__before_atomic(); |
| clear_bit(__IXGBEVF_DISABLED, &adapter->state); |
| pci_set_master(pdev); |
| |
| ixgbevf_reset(adapter); |
| |
| return PCI_ERS_RESULT_RECOVERED; |
| } |
| |
| /** |
| * ixgbevf_io_resume - called when traffic can start flowing again. |
| * @pdev: Pointer to PCI device |
| * |
| * This callback is called when the error recovery driver tells us that |
| * its OK to resume normal operation. Implementation resembles the |
| * second-half of the ixgbevf_resume routine. |
| **/ |
| static void ixgbevf_io_resume(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct ixgbevf_adapter *adapter = netdev_priv(netdev); |
| |
| if (netif_running(netdev)) |
| ixgbevf_up(adapter); |
| |
| netif_device_attach(netdev); |
| } |
| |
| /* PCI Error Recovery (ERS) */ |
| static const struct pci_error_handlers ixgbevf_err_handler = { |
| .error_detected = ixgbevf_io_error_detected, |
| .slot_reset = ixgbevf_io_slot_reset, |
| .resume = ixgbevf_io_resume, |
| }; |
| |
| static struct pci_driver ixgbevf_driver = { |
| .name = ixgbevf_driver_name, |
| .id_table = ixgbevf_pci_tbl, |
| .probe = ixgbevf_probe, |
| .remove = ixgbevf_remove, |
| #ifdef CONFIG_PM |
| /* Power Management Hooks */ |
| .suspend = ixgbevf_suspend, |
| .resume = ixgbevf_resume, |
| #endif |
| .shutdown = ixgbevf_shutdown, |
| .err_handler = &ixgbevf_err_handler |
| }; |
| |
| /** |
| * ixgbevf_init_module - Driver Registration Routine |
| * |
| * ixgbevf_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) |
| { |
| pr_info("%s - version %s\n", ixgbevf_driver_string, |
| ixgbevf_driver_version); |
| |
| pr_info("%s\n", ixgbevf_copyright); |
| ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name); |
| if (!ixgbevf_wq) { |
| pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name); |
| return -ENOMEM; |
| } |
| |
| return pci_register_driver(&ixgbevf_driver); |
| } |
| |
| module_init(ixgbevf_init_module); |
| |
| /** |
| * ixgbevf_exit_module - Driver Exit Cleanup Routine |
| * |
| * ixgbevf_exit_module is called just before the driver is removed |
| * from memory. |
| **/ |
| static void __exit ixgbevf_exit_module(void) |
| { |
| pci_unregister_driver(&ixgbevf_driver); |
| if (ixgbevf_wq) { |
| destroy_workqueue(ixgbevf_wq); |
| ixgbevf_wq = NULL; |
| } |
| } |
| |
| #ifdef DEBUG |
| /** |
| * ixgbevf_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 */ |