--- /dev/null
+/*******************************************************************************
+
+ 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 - 2012 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 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))
+ schedule_work(&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);
+}
+
+/**
+ * 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_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_pull_tail - ixgbevf specific version of skb_pull_tail
+ * @rx_ring: rx descriptor ring packet is being transacted on
+ * @skb: pointer to current skb being adjusted
+ *
+ * This function is an ixgbevf specific version of __pskb_pull_tail. The
+ * main difference between this version and the original function is that
+ * this function can make several assumptions about the state of things
+ * that allow for significant optimizations versus the standard function.
+ * As a result we can do things like drop a frag and maintain an accurate
+ * truesize for the skb.
+ **/
+static void ixgbevf_pull_tail(struct ixgbevf_ring *rx_ring,
+ struct sk_buff *skb)
+{
+ struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
+ unsigned char *va;
+ unsigned int pull_len;
+
+ /* it is valid to use page_address instead of kmap since we are
+ * working with pages allocated out of the lomem pool per
+ * alloc_page(GFP_ATOMIC)
+ */
+ va = skb_frag_address(frag);
+
+ /* 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 */
+ skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
+
+ /* update all of the pointers */
+ skb_frag_size_sub(frag, pull_len);
+ frag->page_offset += pull_len;
+ skb->data_len -= pull_len;
+ skb->tail += pull_len;
+}
+
+/**
+ * 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;
+ }
+ }
+
+ /* place header in linear portion of buffer */
+ if (skb_is_nonlinear(skb))
+ ixgbevf_pull_tail(rx_ring, skb);
+
+ /* 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->pfmemalloc;
+}
+
+/**
+ * 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 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
+
+ if ((size <= IXGBEVF_RX_HDR_SIZE) && !skb_is_nonlinear(skb)) {
+ unsigned char *va = page_address(page) + rx_buffer->page_offset;
+
+ 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;
+ }
+
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
+ rx_buffer->page_offset, 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.
+ */
+ atomic_inc(&page->_count);
+
+ 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;
+ bool clean_complete = true;
+
+ ixgbevf_for_each_ring(ring, q_vector->tx)
+ clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
+
+#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)
+ clean_complete &= (ixgbevf_clean_rx_irq(q_vector, ring,
+ per_ring_budget)
+ < 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(napi);
+ 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_10K_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 (8000 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:
+ default:
+ new_itr = IXGBE_8K_ITR;
+ 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(&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;
+ int err = 0;
+
+ q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
+
+ /* The ideal configuration...
+ * We have enough vectors to map one per queue.
+ */
+ if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
+ for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
+ map_vector_to_rxq(adapter, v_start, rxr_idx);
+
+ for (; txr_idx < txr_remaining; v_start++, txr_idx++)
+ map_vector_to_txq(adapter, v_start, txr_idx);
+ goto out;
+ }
+
+ /* If we don't have enough vectors for a 1-to-1
+ * mapping, we'll have to group them so there are
+ * multiple queues per vector.
+ */
+ /* Re-adjusting *qpv takes care of the remainder. */
+ for (i = v_start; i < q_vectors; i++) {
+ rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
+ for (j = 0; j < rqpv; j++) {
+ map_vector_to_rxq(adapter, i, rxr_idx);
+ rxr_idx++;
+ rxr_remaining--;
+ }
+ }
+ for (i = v_start; i < q_vectors; i++) {
+ tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
+ for (j = 0; j < tqpv; j++) {
+ map_vector_to_txq(adapter, i, txr_idx);
+ txr_idx++;
+ txr_remaining--;
+ }
+ }
+
+out:
+ return err;
+}
+
+/**
+ * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
+ * @adapter: board private structure
+ *
+ * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
+ * interrupts from the kernel.
+ **/
+static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ 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 = 0;
+
+ err = ixgbevf_request_msix_irqs(adapter);
+
+ if (err)
+ hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
+
+ return err;
+}
+
+static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
+{
+ 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;
+ u32 rss_key[10];
+ u16 rss_i = adapter->num_rx_queues;
+ int i, j;
+
+ /* Fill out hash function seeds */
+ netdev_rss_key_fill(rss_key, sizeof(rss_key));
+ for (i = 0; i < 10; i++)
+ IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), rss_key[i]);
+
+ /* Fill out redirection table */
+ for (i = 0, j = 0; i < 64; i++, j++) {
+ if (j == rss_i)
+ j = 0;
+ vfreta = (vfreta << 8) | (j * 0x1);
+ if ((i & 3) == 3)
+ IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
+ }
+
+ /* 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 = -EOPNOTSUPP;
+
+ 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;
+
+ spin_lock_bh(&adapter->mbx_lock);
+
+ /* 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 = 0, 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)) {
+ memcpy(netdev->dev_addr, adapter->hw.mac.addr,
+ netdev->addr_len);
+ memcpy(netdev->perm_addr, adapter->hw.mac.addr,
+ netdev->addr_len);
+ }
+
+ 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 = 0;
+ int vector, v_budget;
+
+ /* It's easy to be greedy for MSI-X vectors, but it really
+ * doesn't do us much good if we have a lot more vectors
+ * than CPU's. So let's be conservative and only ask for
+ * (roughly) 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) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ for (vector = 0; vector < v_budget; vector++)
+ adapter->msix_entries[vector].entry = vector;
+
+ err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
+ if (err)
+ goto out;
+
+ err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
+ if (err)
+ goto out;
+
+ err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
+
+out:
+ return err;
+}
+
+/**
+ * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
+ * @adapter: board private structure to initialize
+ *
+ * We allocate one q_vector per queue interrupt. If allocation fails we
+ * return -ENOMEM.
+ **/
+static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
+{
+ int q_idx, num_q_vectors;
+ struct ixgbevf_q_vector *q_vector;
+
+ 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);
+#ifdef CONFIG_NET_RX_BUSY_POLL
+ napi_hash_add(&q_vector->napi);
+#endif
+ 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");
+ memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
+ }
+
+ if (!is_valid_ether_addr(netdev->dev_addr)) {
+ dev_info(&pdev->dev, "Assigning random MAC address\n");
+ eth_hw_addr_random(netdev);
+ memcpy(hw->mac.addr, netdev->dev_addr, netdev->addr_len);
+ }
+
+ /* 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.
+ **/
+static 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.
+ **/
+static int ixgbevf_close(struct net_device *netdev)
+{
+ struct ixgbevf_adapter *adapter = netdev_priv(netdev);
+
+ ixgbevf_down(adapter);
+ ixgbevf_free_irq(adapter);
+
+ ixgbevf_free_all_tx_resources(adapter);
+ ixgbevf_free_all_rx_resources(adapter);
+
+ return 0;
+}
+
+static 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;
+
+ 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;
+ break;
+ default:
+ if (unlikely(net_ratelimit())) {
+ dev_warn(tx_ring->dev,
+ "partial checksum but proto=%x!\n",
+ first->protocol);
+ }
+ 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 but l4 proto=%x!\n",
+ l4_hdr);
+ }
+ break;
+ }
+
+ /* update TX checksum flag */
+ first->tx_flags |= IXGBE_TX_FLAGS_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;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+ memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
+
+ spin_lock_bh(&adapter->mbx_lock);
+
+ hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
+
+ spin_unlock_bh(&adapter->mbx_lock);
+
+ 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
+};
+
+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)
+{
+ int ret;
+
+ pr_info("%s - version %s\n", ixgbevf_driver_string,
+ ixgbevf_driver_version);
+
+ pr_info("%s\n", ixgbevf_copyright);
+
+ ret = pci_register_driver(&ixgbevf_driver);
+ return ret;
+}
+
+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);
+}
+
+#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 */
Code Review / kvmfornfv.git / blobdiff