diff options
Diffstat (limited to 'drivers/net/ixgbevf/ixgbevf_main.c')
| -rw-r--r-- | drivers/net/ixgbevf/ixgbevf_main.c | 3564 |
1 files changed, 0 insertions, 3564 deletions
diff --git a/drivers/net/ixgbevf/ixgbevf_main.c b/drivers/net/ixgbevf/ixgbevf_main.c deleted file mode 100644 index 2216a3c8b12..00000000000 --- a/drivers/net/ixgbevf/ixgbevf_main.c +++ /dev/null @@ -1,3564 +0,0 @@ -/******************************************************************************* - - Intel 82599 Virtual Function driver - Copyright(c) 1999 - 2010 Intel Corporation. - - This program is free software; you can redistribute it and/or modify it - under the terms and conditions of the GNU General Public License, - version 2, as published by the Free Software Foundation. - - This program is distributed in the hope it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - more details. - - You should have received a copy of the GNU General Public License along with - this program; if not, write to the Free Software Foundation, Inc., - 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - - The full GNU General Public License is included in this distribution in - the file called "COPYING". - - Contact Information: - e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> - Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - -*******************************************************************************/ - - -/****************************************************************************** - Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code -******************************************************************************/ -#include <linux/types.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/netdevice.h> -#include <linux/vmalloc.h> -#include <linux/string.h> -#include <linux/in.h> -#include <linux/ip.h> -#include <linux/tcp.h> -#include <linux/ipv6.h> -#include <linux/slab.h> -#include <net/checksum.h> -#include <net/ip6_checksum.h> -#include <linux/ethtool.h> -#include <linux/if_vlan.h> - -#include "ixgbevf.h" - -char ixgbevf_driver_name[] = "ixgbevf"; -static const char ixgbevf_driver_string[] = - "Intel(R) 82599 Virtual Function"; - -#define DRV_VERSION "1.0.12-k0" -const char ixgbevf_driver_version[] = DRV_VERSION; -static char ixgbevf_copyright[] = - "Copyright (c) 2009 - 2010 Intel Corporation."; - -static const struct ixgbevf_info *ixgbevf_info_tbl[] = { - [board_82599_vf] = &ixgbevf_vf_info, -}; - -/* ixgbevf_pci_tbl - PCI Device ID Table - * - * Wildcard entries (PCI_ANY_ID) should come last - * Last entry must be all 0s - * - * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, - * Class, Class Mask, private data (not used) } - */ -static struct pci_device_id ixgbevf_pci_tbl[] = { - {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), - board_82599_vf}, - - /* required last entry */ - {0, } -}; -MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl); - -MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); -MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_VERSION); - -#define DEFAULT_DEBUG_LEVEL_SHIFT 3 - -/* forward decls */ -static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector); -static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx, - u32 itr_reg); - -static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw, - struct ixgbevf_ring *rx_ring, - u32 val) -{ - /* - * Force memory writes to complete before letting h/w - * know there are new descriptors to fetch. (Only - * applicable for weak-ordered memory model archs, - * such as IA-64). - */ - wmb(); - IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val); -} - -/* - * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors - * @adapter: pointer to adapter struct - * @direction: 0 for Rx, 1 for Tx, -1 for other causes - * @queue: queue to map the corresponding interrupt to - * @msix_vector: the vector to map to the corresponding queue - * - */ -static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction, - u8 queue, u8 msix_vector) -{ - u32 ivar, index; - struct ixgbe_hw *hw = &adapter->hw; - if (direction == -1) { - /* other causes */ - msix_vector |= IXGBE_IVAR_ALLOC_VAL; - ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC); - ivar &= ~0xFF; - ivar |= msix_vector; - IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar); - } else { - /* tx or rx causes */ - msix_vector |= IXGBE_IVAR_ALLOC_VAL; - index = ((16 * (queue & 1)) + (8 * direction)); - ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1)); - ivar &= ~(0xFF << index); - ivar |= (msix_vector << index); - IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar); - } -} - -static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_adapter *adapter, - struct ixgbevf_tx_buffer - *tx_buffer_info) -{ - if (tx_buffer_info->dma) { - if (tx_buffer_info->mapped_as_page) - dma_unmap_page(&adapter->pdev->dev, - tx_buffer_info->dma, - tx_buffer_info->length, - DMA_TO_DEVICE); - else - dma_unmap_single(&adapter->pdev->dev, - tx_buffer_info->dma, - tx_buffer_info->length, - DMA_TO_DEVICE); - tx_buffer_info->dma = 0; - } - if (tx_buffer_info->skb) { - dev_kfree_skb_any(tx_buffer_info->skb); - tx_buffer_info->skb = NULL; - } - tx_buffer_info->time_stamp = 0; - /* tx_buffer_info must be completely set up in the transmit path */ -} - -static inline bool ixgbevf_check_tx_hang(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring, - unsigned int eop) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 head, tail; - - /* Detect a transmit hang in hardware, this serializes the - * check with the clearing of time_stamp and movement of eop */ - head = readl(hw->hw_addr + tx_ring->head); - tail = readl(hw->hw_addr + tx_ring->tail); - adapter->detect_tx_hung = false; - if ((head != tail) && - tx_ring->tx_buffer_info[eop].time_stamp && - time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ)) { - /* detected Tx unit hang */ - union ixgbe_adv_tx_desc *tx_desc; - tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); - printk(KERN_ERR "Detected Tx Unit Hang\n" - " Tx Queue <%d>\n" - " TDH, TDT <%x>, <%x>\n" - " next_to_use <%x>\n" - " next_to_clean <%x>\n" - "tx_buffer_info[next_to_clean]\n" - " time_stamp <%lx>\n" - " jiffies <%lx>\n", - tx_ring->queue_index, - head, tail, - tx_ring->next_to_use, eop, - tx_ring->tx_buffer_info[eop].time_stamp, jiffies); - return true; - } - - return false; -} - -#define IXGBE_MAX_TXD_PWR 14 -#define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR) - -/* Tx Descriptors needed, worst case */ -#define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \ - (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) -#ifdef MAX_SKB_FRAGS -#define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \ - MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */ -#else -#define DESC_NEEDED TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) -#endif - -static void ixgbevf_tx_timeout(struct net_device *netdev); - -/** - * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes - * @adapter: board private structure - * @tx_ring: tx ring to clean - **/ -static bool ixgbevf_clean_tx_irq(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - union ixgbe_adv_tx_desc *tx_desc, *eop_desc; - struct ixgbevf_tx_buffer *tx_buffer_info; - unsigned int i, eop, count = 0; - unsigned int total_bytes = 0, total_packets = 0; - - i = tx_ring->next_to_clean; - eop = tx_ring->tx_buffer_info[i].next_to_watch; - eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); - - while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) && - (count < tx_ring->work_limit)) { - bool cleaned = false; - rmb(); /* read buffer_info after eop_desc */ - for ( ; !cleaned; count++) { - struct sk_buff *skb; - tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i); - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - cleaned = (i == eop); - skb = tx_buffer_info->skb; - - if (cleaned && skb) { - unsigned int segs, bytecount; - - /* gso_segs is currently only valid for tcp */ - segs = skb_shinfo(skb)->gso_segs ?: 1; - /* multiply data chunks by size of headers */ - bytecount = ((segs - 1) * skb_headlen(skb)) + - skb->len; - total_packets += segs; - total_bytes += bytecount; - } - - ixgbevf_unmap_and_free_tx_resource(adapter, - tx_buffer_info); - - tx_desc->wb.status = 0; - - i++; - if (i == tx_ring->count) - i = 0; - } - - eop = tx_ring->tx_buffer_info[i].next_to_watch; - eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); - } - - tx_ring->next_to_clean = i; - -#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) - if (unlikely(count && netif_carrier_ok(netdev) && - (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) { - /* Make sure that anybody stopping the queue after this - * sees the new next_to_clean. - */ - smp_mb(); -#ifdef HAVE_TX_MQ - if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) && - !test_bit(__IXGBEVF_DOWN, &adapter->state)) { - netif_wake_subqueue(netdev, tx_ring->queue_index); - ++adapter->restart_queue; - } -#else - if (netif_queue_stopped(netdev) && - !test_bit(__IXGBEVF_DOWN, &adapter->state)) { - netif_wake_queue(netdev); - ++adapter->restart_queue; - } -#endif - } - - if (adapter->detect_tx_hung) { - if (ixgbevf_check_tx_hang(adapter, tx_ring, i)) { - /* schedule immediate reset if we believe we hung */ - printk(KERN_INFO - "tx hang %d detected, resetting adapter\n", - adapter->tx_timeout_count + 1); - ixgbevf_tx_timeout(adapter->netdev); - } - } - - /* re-arm the interrupt */ - if ((count >= tx_ring->work_limit) && - (!test_bit(__IXGBEVF_DOWN, &adapter->state))) { - IXGBE_WRITE_REG(hw, IXGBE_VTEICS, tx_ring->v_idx); - } - - tx_ring->total_bytes += total_bytes; - tx_ring->total_packets += total_packets; - - netdev->stats.tx_bytes += total_bytes; - netdev->stats.tx_packets += total_packets; - - return count < tx_ring->work_limit; -} - -/** - * ixgbevf_receive_skb - Send a completed packet up the stack - * @q_vector: structure containing interrupt and ring information - * @skb: packet to send up - * @status: hardware indication of status of receive - * @rx_ring: rx descriptor ring (for a specific queue) to setup - * @rx_desc: rx descriptor - **/ -static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector, - struct sk_buff *skb, u8 status, - struct ixgbevf_ring *ring, - union ixgbe_adv_rx_desc *rx_desc) -{ - struct ixgbevf_adapter *adapter = q_vector->adapter; - bool is_vlan = (status & IXGBE_RXD_STAT_VP); - u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan); - int ret; - - if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) { - if (adapter->vlgrp && is_vlan) - vlan_gro_receive(&q_vector->napi, - adapter->vlgrp, - tag, skb); - else - napi_gro_receive(&q_vector->napi, skb); - } else { - if (adapter->vlgrp && is_vlan) - ret = vlan_hwaccel_rx(skb, adapter->vlgrp, tag); - else - ret = netif_rx(skb); - } -} - -/** - * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum - * @adapter: address of board private structure - * @status_err: hardware indication of status of receive - * @skb: skb currently being received and modified - **/ -static inline void ixgbevf_rx_checksum(struct ixgbevf_adapter *adapter, - u32 status_err, struct sk_buff *skb) -{ - skb_checksum_none_assert(skb); - - /* Rx csum disabled */ - if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED)) - return; - - /* if IP and error */ - if ((status_err & IXGBE_RXD_STAT_IPCS) && - (status_err & IXGBE_RXDADV_ERR_IPE)) { - adapter->hw_csum_rx_error++; - return; - } - - if (!(status_err & IXGBE_RXD_STAT_L4CS)) - return; - - if (status_err & IXGBE_RXDADV_ERR_TCPE) { - adapter->hw_csum_rx_error++; - return; - } - - /* It must be a TCP or UDP packet with a valid checksum */ - skb->ip_summed = CHECKSUM_UNNECESSARY; - adapter->hw_csum_rx_good++; -} - -/** - * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split - * @adapter: address of board private structure - **/ -static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *rx_ring, - int cleaned_count) -{ - struct pci_dev *pdev = adapter->pdev; - union ixgbe_adv_rx_desc *rx_desc; - struct ixgbevf_rx_buffer *bi; - struct sk_buff *skb; - unsigned int i; - unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN; - - i = rx_ring->next_to_use; - bi = &rx_ring->rx_buffer_info[i]; - - while (cleaned_count--) { - rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i); - - if (!bi->page_dma && - (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) { - if (!bi->page) { - bi->page = netdev_alloc_page(adapter->netdev); - if (!bi->page) { - adapter->alloc_rx_page_failed++; - goto no_buffers; - } - bi->page_offset = 0; - } else { - /* use a half page if we're re-using */ - bi->page_offset ^= (PAGE_SIZE / 2); - } - - bi->page_dma = dma_map_page(&pdev->dev, bi->page, - bi->page_offset, - (PAGE_SIZE / 2), - DMA_FROM_DEVICE); - } - - skb = bi->skb; - if (!skb) { - skb = netdev_alloc_skb(adapter->netdev, - bufsz); - - if (!skb) { - adapter->alloc_rx_buff_failed++; - goto no_buffers; - } - - /* - * Make buffer alignment 2 beyond a 16 byte boundary - * this will result in a 16 byte aligned IP header after - * the 14 byte MAC header is removed - */ - skb_reserve(skb, NET_IP_ALIGN); - - bi->skb = skb; - } - if (!bi->dma) { - bi->dma = dma_map_single(&pdev->dev, skb->data, - rx_ring->rx_buf_len, - DMA_FROM_DEVICE); - } - /* Refresh the desc even if buffer_addrs didn't change because - * each write-back erases this info. */ - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma); - rx_desc->read.hdr_addr = cpu_to_le64(bi->dma); - } else { - rx_desc->read.pkt_addr = cpu_to_le64(bi->dma); - } - - i++; - if (i == rx_ring->count) - i = 0; - bi = &rx_ring->rx_buffer_info[i]; - } - -no_buffers: - if (rx_ring->next_to_use != i) { - rx_ring->next_to_use = i; - if (i-- == 0) - i = (rx_ring->count - 1); - - ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i); - } -} - -static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter, - u64 qmask) -{ - u32 mask; - struct ixgbe_hw *hw = &adapter->hw; - - mask = (qmask & 0xFFFFFFFF); - IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask); -} - -static inline u16 ixgbevf_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc) -{ - return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info; -} - -static inline u16 ixgbevf_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc) -{ - return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; -} - -static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector, - struct ixgbevf_ring *rx_ring, - int *work_done, int work_to_do) -{ - struct ixgbevf_adapter *adapter = q_vector->adapter; - struct pci_dev *pdev = adapter->pdev; - union ixgbe_adv_rx_desc *rx_desc, *next_rxd; - struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer; - struct sk_buff *skb; - unsigned int i; - u32 len, staterr; - u16 hdr_info; - bool cleaned = false; - int cleaned_count = 0; - unsigned int total_rx_bytes = 0, total_rx_packets = 0; - - i = rx_ring->next_to_clean; - rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i); - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - rx_buffer_info = &rx_ring->rx_buffer_info[i]; - - while (staterr & IXGBE_RXD_STAT_DD) { - u32 upper_len = 0; - if (*work_done >= work_to_do) - break; - (*work_done)++; - - rmb(); /* read descriptor and rx_buffer_info after status DD */ - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - hdr_info = le16_to_cpu(ixgbevf_get_hdr_info(rx_desc)); - len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >> - IXGBE_RXDADV_HDRBUFLEN_SHIFT; - if (hdr_info & IXGBE_RXDADV_SPH) - adapter->rx_hdr_split++; - if (len > IXGBEVF_RX_HDR_SIZE) - len = IXGBEVF_RX_HDR_SIZE; - upper_len = le16_to_cpu(rx_desc->wb.upper.length); - } else { - len = le16_to_cpu(rx_desc->wb.upper.length); - } - cleaned = true; - skb = rx_buffer_info->skb; - prefetch(skb->data - NET_IP_ALIGN); - rx_buffer_info->skb = NULL; - - if (rx_buffer_info->dma) { - dma_unmap_single(&pdev->dev, rx_buffer_info->dma, - rx_ring->rx_buf_len, - DMA_FROM_DEVICE); - rx_buffer_info->dma = 0; - skb_put(skb, len); - } - - if (upper_len) { - dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma, - PAGE_SIZE / 2, DMA_FROM_DEVICE); - rx_buffer_info->page_dma = 0; - skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, - rx_buffer_info->page, - rx_buffer_info->page_offset, - upper_len); - - if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) || - (page_count(rx_buffer_info->page) != 1)) - rx_buffer_info->page = NULL; - else - get_page(rx_buffer_info->page); - - skb->len += upper_len; - skb->data_len += upper_len; - skb->truesize += upper_len; - } - - i++; - if (i == rx_ring->count) - i = 0; - - next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i); - prefetch(next_rxd); - cleaned_count++; - - next_buffer = &rx_ring->rx_buffer_info[i]; - - if (!(staterr & IXGBE_RXD_STAT_EOP)) { - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - rx_buffer_info->skb = next_buffer->skb; - rx_buffer_info->dma = next_buffer->dma; - next_buffer->skb = skb; - next_buffer->dma = 0; - } else { - skb->next = next_buffer->skb; - skb->next->prev = skb; - } - adapter->non_eop_descs++; - goto next_desc; - } - - /* ERR_MASK will only have valid bits if EOP set */ - if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) { - dev_kfree_skb_irq(skb); - goto next_desc; - } - - ixgbevf_rx_checksum(adapter, staterr, skb); - - /* probably a little skewed due to removing CRC */ - total_rx_bytes += skb->len; - total_rx_packets++; - - /* - * Work around issue of some types of VM to VM loop back - * packets not getting split correctly - */ - if (staterr & IXGBE_RXD_STAT_LB) { - u32 header_fixup_len = skb_headlen(skb); - if (header_fixup_len < 14) - skb_push(skb, header_fixup_len); - } - skb->protocol = eth_type_trans(skb, adapter->netdev); - - ixgbevf_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc); - -next_desc: - rx_desc->wb.upper.status_error = 0; - - /* return some buffers to hardware, one at a time is too slow */ - if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) { - ixgbevf_alloc_rx_buffers(adapter, rx_ring, - cleaned_count); - cleaned_count = 0; - } - - /* use prefetched values */ - rx_desc = next_rxd; - rx_buffer_info = &rx_ring->rx_buffer_info[i]; - - staterr = le32_to_cpu(rx_desc->wb.upper.status_error); - } - - rx_ring->next_to_clean = i; - cleaned_count = IXGBE_DESC_UNUSED(rx_ring); - - if (cleaned_count) - ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count); - - rx_ring->total_packets += total_rx_packets; - rx_ring->total_bytes += total_rx_bytes; - adapter->netdev->stats.rx_bytes += total_rx_bytes; - adapter->netdev->stats.rx_packets += total_rx_packets; - - return cleaned; -} - -/** - * ixgbevf_clean_rxonly - msix (aka one shot) rx clean routine - * @napi: napi struct with our devices info in it - * @budget: amount of work driver is allowed to do this pass, in packets - * - * This function is optimized for cleaning one queue only on a single - * q_vector!!! - **/ -static int ixgbevf_clean_rxonly(struct napi_struct *napi, int budget) -{ - struct ixgbevf_q_vector *q_vector = - container_of(napi, struct ixgbevf_q_vector, napi); - struct ixgbevf_adapter *adapter = q_vector->adapter; - struct ixgbevf_ring *rx_ring = NULL; - int work_done = 0; - long r_idx; - - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - rx_ring = &(adapter->rx_ring[r_idx]); - - ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget); - - /* If all Rx work done, exit the polling mode */ - if (work_done < budget) { - napi_complete(napi); - if (adapter->itr_setting & 1) - ixgbevf_set_itr_msix(q_vector); - if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) - ixgbevf_irq_enable_queues(adapter, rx_ring->v_idx); - } - - return work_done; -} - -/** - * ixgbevf_clean_rxonly_many - msix (aka one shot) rx clean routine - * @napi: napi struct with our devices info in it - * @budget: amount of work driver is allowed to do this pass, in packets - * - * This function will clean more than one rx queue associated with a - * q_vector. - **/ -static int ixgbevf_clean_rxonly_many(struct napi_struct *napi, int budget) -{ - struct ixgbevf_q_vector *q_vector = - container_of(napi, struct ixgbevf_q_vector, napi); - struct ixgbevf_adapter *adapter = q_vector->adapter; - struct ixgbevf_ring *rx_ring = NULL; - int work_done = 0, i; - long r_idx; - u64 enable_mask = 0; - - /* attempt to distribute budget to each queue fairly, but don't allow - * the budget to go below 1 because we'll exit polling */ - budget /= (q_vector->rxr_count ?: 1); - budget = max(budget, 1); - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - for (i = 0; i < q_vector->rxr_count; i++) { - rx_ring = &(adapter->rx_ring[r_idx]); - ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget); - enable_mask |= rx_ring->v_idx; - r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues, - r_idx + 1); - } - -#ifndef HAVE_NETDEV_NAPI_LIST - if (!netif_running(adapter->netdev)) - work_done = 0; - -#endif - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - rx_ring = &(adapter->rx_ring[r_idx]); - - /* If all Rx work done, exit the polling mode */ - if (work_done < budget) { - napi_complete(napi); - if (adapter->itr_setting & 1) - ixgbevf_set_itr_msix(q_vector); - if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) - ixgbevf_irq_enable_queues(adapter, enable_mask); - } - - return work_done; -} - - -/** - * ixgbevf_configure_msix - Configure MSI-X hardware - * @adapter: board private structure - * - * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X - * interrupts. - **/ -static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter) -{ - struct ixgbevf_q_vector *q_vector; - struct ixgbe_hw *hw = &adapter->hw; - int i, j, q_vectors, v_idx, r_idx; - u32 mask; - - q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* - * Populate the IVAR table and set the ITR values to the - * corresponding register. - */ - for (v_idx = 0; v_idx < q_vectors; v_idx++) { - q_vector = adapter->q_vector[v_idx]; - /* XXX for_each_set_bit(...) */ - r_idx = find_first_bit(q_vector->rxr_idx, - adapter->num_rx_queues); - - for (i = 0; i < q_vector->rxr_count; i++) { - j = adapter->rx_ring[r_idx].reg_idx; - ixgbevf_set_ivar(adapter, 0, j, v_idx); - r_idx = find_next_bit(q_vector->rxr_idx, - adapter->num_rx_queues, - r_idx + 1); - } - r_idx = find_first_bit(q_vector->txr_idx, - adapter->num_tx_queues); - - for (i = 0; i < q_vector->txr_count; i++) { - j = adapter->tx_ring[r_idx].reg_idx; - ixgbevf_set_ivar(adapter, 1, j, v_idx); - r_idx = find_next_bit(q_vector->txr_idx, - adapter->num_tx_queues, - r_idx + 1); - } - - /* if this is a tx only vector halve the interrupt rate */ - if (q_vector->txr_count && !q_vector->rxr_count) - q_vector->eitr = (adapter->eitr_param >> 1); - else if (q_vector->rxr_count) - /* rx only */ - q_vector->eitr = adapter->eitr_param; - - ixgbevf_write_eitr(adapter, v_idx, q_vector->eitr); - } - - ixgbevf_set_ivar(adapter, -1, 1, v_idx); - - /* set up to autoclear timer, and the vectors */ - mask = IXGBE_EIMS_ENABLE_MASK; - mask &= ~IXGBE_EIMS_OTHER; - IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, mask); -} - -enum latency_range { - lowest_latency = 0, - low_latency = 1, - bulk_latency = 2, - latency_invalid = 255 -}; - -/** - * ixgbevf_update_itr - update the dynamic ITR value based on statistics - * @adapter: pointer to adapter - * @eitr: eitr setting (ints per sec) to give last timeslice - * @itr_setting: current throttle rate in ints/second - * @packets: the number of packets during this measurement interval - * @bytes: the number of bytes during this measurement interval - * - * Stores a new ITR value based on packets and byte - * counts during the last interrupt. The advantage of per interrupt - * computation is faster updates and more accurate ITR for the current - * traffic pattern. Constants in this function were computed - * based on theoretical maximum wire speed and thresholds were set based - * on testing data as well as attempting to minimize response time - * while increasing bulk throughput. - **/ -static u8 ixgbevf_update_itr(struct ixgbevf_adapter *adapter, - u32 eitr, u8 itr_setting, - int packets, int bytes) -{ - unsigned int retval = itr_setting; - u32 timepassed_us; - u64 bytes_perint; - - if (packets == 0) - goto update_itr_done; - - - /* simple throttlerate management - * 0-20MB/s lowest (100000 ints/s) - * 20-100MB/s low (20000 ints/s) - * 100-1249MB/s bulk (8000 ints/s) - */ - /* what was last interrupt timeslice? */ - timepassed_us = 1000000/eitr; - bytes_perint = bytes / timepassed_us; /* bytes/usec */ - - switch (itr_setting) { - case lowest_latency: - if (bytes_perint > adapter->eitr_low) - retval = low_latency; - break; - case low_latency: - if (bytes_perint > adapter->eitr_high) - retval = bulk_latency; - else if (bytes_perint <= adapter->eitr_low) - retval = lowest_latency; - break; - case bulk_latency: - if (bytes_perint <= adapter->eitr_high) - retval = low_latency; - break; - } - -update_itr_done: - return retval; -} - -/** - * ixgbevf_write_eitr - write VTEITR register in hardware specific way - * @adapter: pointer to adapter struct - * @v_idx: vector index into q_vector array - * @itr_reg: new value to be written in *register* format, not ints/s - * - * This function is made to be called by ethtool and by the driver - * when it needs to update VTEITR registers at runtime. Hardware - * specific quirks/differences are taken care of here. - */ -static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx, - u32 itr_reg) -{ - struct ixgbe_hw *hw = &adapter->hw; - - itr_reg = EITR_INTS_PER_SEC_TO_REG(itr_reg); - - /* - * set the WDIS bit to not clear the timer bits and cause an - * immediate assertion of the interrupt - */ - itr_reg |= IXGBE_EITR_CNT_WDIS; - - IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg); -} - -static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector) -{ - struct ixgbevf_adapter *adapter = q_vector->adapter; - u32 new_itr; - u8 current_itr, ret_itr; - int i, r_idx, v_idx = q_vector->v_idx; - struct ixgbevf_ring *rx_ring, *tx_ring; - - r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues); - for (i = 0; i < q_vector->txr_count; i++) { - tx_ring = &(adapter->tx_ring[r_idx]); - ret_itr = ixgbevf_update_itr(adapter, q_vector->eitr, - q_vector->tx_itr, - tx_ring->total_packets, - tx_ring->total_bytes); - /* if the result for this queue would decrease interrupt - * rate for this vector then use that result */ - q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ? - q_vector->tx_itr - 1 : ret_itr); - r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues, - r_idx + 1); - } - - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - for (i = 0; i < q_vector->rxr_count; i++) { - rx_ring = &(adapter->rx_ring[r_idx]); - ret_itr = ixgbevf_update_itr(adapter, q_vector->eitr, - q_vector->rx_itr, - rx_ring->total_packets, - rx_ring->total_bytes); - /* if the result for this queue would decrease interrupt - * rate for this vector then use that result */ - q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ? - q_vector->rx_itr - 1 : ret_itr); - r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues, - r_idx + 1); - } - - current_itr = max(q_vector->rx_itr, q_vector->tx_itr); - - switch (current_itr) { - /* counts and packets in update_itr are dependent on these numbers */ - case lowest_latency: - new_itr = 100000; - break; - case low_latency: - new_itr = 20000; /* aka hwitr = ~200 */ - break; - case bulk_latency: - default: - new_itr = 8000; - break; - } - - if (new_itr != q_vector->eitr) { - u32 itr_reg; - - /* save the algorithm value here, not the smoothed one */ - q_vector->eitr = new_itr; - /* do an exponential smoothing */ - new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100); - itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr); - ixgbevf_write_eitr(adapter, v_idx, itr_reg); - } -} - -static irqreturn_t ixgbevf_msix_mbx(int irq, void *data) -{ - struct net_device *netdev = data; - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - u32 eicr; - u32 msg; - - eicr = IXGBE_READ_REG(hw, IXGBE_VTEICS); - IXGBE_WRITE_REG(hw, IXGBE_VTEICR, eicr); - - if (!hw->mbx.ops.check_for_ack(hw)) { - /* - * checking for the ack clears the PFACK bit. Place - * it back in the v2p_mailbox cache so that anyone - * polling for an ack will not miss it. Also - * avoid the read below because the code to read - * the mailbox will also clear the ack bit. This was - * causing lost acks. Just cache the bit and exit - * the IRQ handler. - */ - hw->mbx.v2p_mailbox |= IXGBE_VFMAILBOX_PFACK; - goto out; - } - - /* Not an ack interrupt, go ahead and read the message */ - hw->mbx.ops.read(hw, &msg, 1); - - if ((msg & IXGBE_MBVFICR_VFREQ_MASK) == IXGBE_PF_CONTROL_MSG) - mod_timer(&adapter->watchdog_timer, - round_jiffies(jiffies + 1)); - -out: - return IRQ_HANDLED; -} - -static irqreturn_t ixgbevf_msix_clean_tx(int irq, void *data) -{ - struct ixgbevf_q_vector *q_vector = data; - struct ixgbevf_adapter *adapter = q_vector->adapter; - struct ixgbevf_ring *tx_ring; - int i, r_idx; - - if (!q_vector->txr_count) - return IRQ_HANDLED; - - r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues); - for (i = 0; i < q_vector->txr_count; i++) { - tx_ring = &(adapter->tx_ring[r_idx]); - tx_ring->total_bytes = 0; - tx_ring->total_packets = 0; - ixgbevf_clean_tx_irq(adapter, tx_ring); - r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues, - r_idx + 1); - } - - if (adapter->itr_setting & 1) - ixgbevf_set_itr_msix(q_vector); - - return IRQ_HANDLED; -} - -/** - * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues) - * @irq: unused - * @data: pointer to our q_vector struct for this interrupt vector - **/ -static irqreturn_t ixgbevf_msix_clean_rx(int irq, void *data) -{ - struct ixgbevf_q_vector *q_vector = data; - struct ixgbevf_adapter *adapter = q_vector->adapter; - struct ixgbe_hw *hw = &adapter->hw; - struct ixgbevf_ring *rx_ring; - int r_idx; - int i; - - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - for (i = 0; i < q_vector->rxr_count; i++) { - rx_ring = &(adapter->rx_ring[r_idx]); - rx_ring->total_bytes = 0; - rx_ring->total_packets = 0; - r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues, - r_idx + 1); - } - - if (!q_vector->rxr_count) - return IRQ_HANDLED; - - r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); - rx_ring = &(adapter->rx_ring[r_idx]); - /* disable interrupts on this vector only */ - IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, rx_ring->v_idx); - napi_schedule(&q_vector->napi); - - - return IRQ_HANDLED; -} - -static irqreturn_t ixgbevf_msix_clean_many(int irq, void *data) -{ - ixgbevf_msix_clean_rx(irq, data); - ixgbevf_msix_clean_tx(irq, data); - - return IRQ_HANDLED; -} - -static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx, - int r_idx) -{ - struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx]; - - set_bit(r_idx, q_vector->rxr_idx); - q_vector->rxr_count++; - a->rx_ring[r_idx].v_idx = 1 << v_idx; -} - -static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx, - int t_idx) -{ - struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx]; - - set_bit(t_idx, q_vector->txr_idx); - q_vector->txr_count++; - a->tx_ring[t_idx].v_idx = 1 << v_idx; -} - -/** - * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors - * @adapter: board private structure to initialize - * - * This function maps descriptor rings to the queue-specific vectors - * we were allotted through the MSI-X enabling code. Ideally, we'd have - * one vector per ring/queue, but on a constrained vector budget, we - * group the rings as "efficiently" as possible. You would add new - * mapping configurations in here. - **/ -static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter) -{ - int q_vectors; - int v_start = 0; - int rxr_idx = 0, txr_idx = 0; - int rxr_remaining = adapter->num_rx_queues; - int txr_remaining = adapter->num_tx_queues; - int i, j; - int rqpv, tqpv; - int err = 0; - - q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - /* - * The ideal configuration... - * We have enough vectors to map one per queue. - */ - if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) { - for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++) - map_vector_to_rxq(adapter, v_start, rxr_idx); - - for (; txr_idx < txr_remaining; v_start++, txr_idx++) - map_vector_to_txq(adapter, v_start, txr_idx); - goto out; - } - - /* - * If we don't have enough vectors for a 1-to-1 - * mapping, we'll have to group them so there are - * multiple queues per vector. - */ - /* Re-adjusting *qpv takes care of the remainder. */ - for (i = v_start; i < q_vectors; i++) { - rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i); - for (j = 0; j < rqpv; j++) { - map_vector_to_rxq(adapter, i, rxr_idx); - rxr_idx++; - rxr_remaining--; - } - } - for (i = v_start; i < q_vectors; i++) { - tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i); - for (j = 0; j < tqpv; j++) { - map_vector_to_txq(adapter, i, txr_idx); - txr_idx++; - txr_remaining--; - } - } - -out: - return err; -} - -/** - * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts - * @adapter: board private structure - * - * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests - * interrupts from the kernel. - **/ -static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - irqreturn_t (*handler)(int, void *); - int i, vector, q_vectors, err; - int ri = 0, ti = 0; - - /* Decrement for Other and TCP Timer vectors */ - q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - -#define SET_HANDLER(_v) (((_v)->rxr_count && (_v)->txr_count) \ - ? &ixgbevf_msix_clean_many : \ - (_v)->rxr_count ? &ixgbevf_msix_clean_rx : \ - (_v)->txr_count ? &ixgbevf_msix_clean_tx : \ - NULL) - for (vector = 0; vector < q_vectors; vector++) { - handler = SET_HANDLER(adapter->q_vector[vector]); - - if (handler == &ixgbevf_msix_clean_rx) { - sprintf(adapter->name[vector], "%s-%s-%d", - netdev->name, "rx", ri++); - } else if (handler == &ixgbevf_msix_clean_tx) { - sprintf(adapter->name[vector], "%s-%s-%d", - netdev->name, "tx", ti++); - } else if (handler == &ixgbevf_msix_clean_many) { - sprintf(adapter->name[vector], "%s-%s-%d", - netdev->name, "TxRx", vector); - } else { - /* skip this unused q_vector */ - continue; - } - err = request_irq(adapter->msix_entries[vector].vector, - handler, 0, adapter->name[vector], - adapter->q_vector[vector]); - if (err) { - hw_dbg(&adapter->hw, - "request_irq failed for MSIX interrupt " - "Error: %d\n", err); - goto free_queue_irqs; - } - } - - sprintf(adapter->name[vector], "%s:mbx", netdev->name); - err = request_irq(adapter->msix_entries[vector].vector, - &ixgbevf_msix_mbx, 0, adapter->name[vector], netdev); - if (err) { - hw_dbg(&adapter->hw, - "request_irq for msix_mbx failed: %d\n", err); - goto free_queue_irqs; - } - - return 0; - -free_queue_irqs: - for (i = vector - 1; i >= 0; i--) - free_irq(adapter->msix_entries[--vector].vector, - &(adapter->q_vector[i])); - pci_disable_msix(adapter->pdev); - kfree(adapter->msix_entries); - adapter->msix_entries = NULL; - return err; -} - -static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter) -{ - int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - for (i = 0; i < q_vectors; i++) { - struct ixgbevf_q_vector *q_vector = adapter->q_vector[i]; - bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES); - bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES); - q_vector->rxr_count = 0; - q_vector->txr_count = 0; - q_vector->eitr = adapter->eitr_param; - } -} - -/** - * ixgbevf_request_irq - initialize interrupts - * @adapter: board private structure - * - * Attempts to configure interrupts using the best available - * capabilities of the hardware and kernel. - **/ -static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter) -{ - int err = 0; - - err = ixgbevf_request_msix_irqs(adapter); - - if (err) - hw_dbg(&adapter->hw, - "request_irq failed, Error %d\n", err); - - return err; -} - -static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - int i, q_vectors; - - q_vectors = adapter->num_msix_vectors; - - i = q_vectors - 1; - - free_irq(adapter->msix_entries[i].vector, netdev); - i--; - - for (; i >= 0; i--) { - free_irq(adapter->msix_entries[i].vector, - adapter->q_vector[i]); - } - - ixgbevf_reset_q_vectors(adapter); -} - -/** - * ixgbevf_irq_disable - Mask off interrupt generation on the NIC - * @adapter: board private structure - **/ -static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter) -{ - int i; - struct ixgbe_hw *hw = &adapter->hw; - - IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0); - - IXGBE_WRITE_FLUSH(hw); - - for (i = 0; i < adapter->num_msix_vectors; i++) - synchronize_irq(adapter->msix_entries[i].vector); -} - -/** - * ixgbevf_irq_enable - Enable default interrupt generation settings - * @adapter: board private structure - **/ -static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter, - bool queues, bool flush) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 mask; - u64 qmask; - - mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE); - qmask = ~0; - - IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask); - - if (queues) - ixgbevf_irq_enable_queues(adapter, qmask); - - if (flush) - IXGBE_WRITE_FLUSH(hw); -} - -/** - * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset - * @adapter: board private structure - * - * Configure the Tx unit of the MAC after a reset. - **/ -static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter) -{ - u64 tdba; - struct ixgbe_hw *hw = &adapter->hw; - u32 i, j, tdlen, txctrl; - - /* Setup the HW Tx Head and Tail descriptor pointers */ - for (i = 0; i < adapter->num_tx_queues; i++) { - struct ixgbevf_ring *ring = &adapter->tx_ring[i]; - j = ring->reg_idx; - tdba = ring->dma; - tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc); - IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j), - (tdba & DMA_BIT_MASK(32))); - IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32)); - IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen); - IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0); - IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0); - adapter->tx_ring[i].head = IXGBE_VFTDH(j); - adapter->tx_ring[i].tail = IXGBE_VFTDT(j); - /* Disable Tx Head Writeback RO bit, since this hoses - * bookkeeping if things aren't delivered in order. - */ - txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j)); - txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN; - IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl); - } -} - -#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 - -static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index) -{ - struct ixgbevf_ring *rx_ring; - struct ixgbe_hw *hw = &adapter->hw; - u32 srrctl; - - rx_ring = &adapter->rx_ring[index]; - - srrctl = IXGBE_SRRCTL_DROP_EN; - - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - u16 bufsz = IXGBEVF_RXBUFFER_2048; - /* grow the amount we can receive on large page machines */ - if (bufsz < (PAGE_SIZE / 2)) - bufsz = (PAGE_SIZE / 2); - /* cap the bufsz at our largest descriptor size */ - bufsz = min((u16)IXGBEVF_MAX_RXBUFFER, bufsz); - - srrctl |= bufsz >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; - srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; - srrctl |= ((IXGBEVF_RX_HDR_SIZE << - IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) & - IXGBE_SRRCTL_BSIZEHDR_MASK); - } else { - srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; - - if (rx_ring->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE) - srrctl |= IXGBEVF_RXBUFFER_2048 >> - IXGBE_SRRCTL_BSIZEPKT_SHIFT; - else - srrctl |= rx_ring->rx_buf_len >> - IXGBE_SRRCTL_BSIZEPKT_SHIFT; - } - IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl); -} - -/** - * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset - * @adapter: board private structure - * - * Configure the Rx unit of the MAC after a reset. - **/ -static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter) -{ - u64 rdba; - struct ixgbe_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; - int i, j; - u32 rdlen; - int rx_buf_len; - - /* Decide whether to use packet split mode or not */ - if (netdev->mtu > ETH_DATA_LEN) { - if (adapter->flags & IXGBE_FLAG_RX_PS_CAPABLE) - adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED; - else - adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED; - } else { - if (adapter->flags & IXGBE_FLAG_RX_1BUF_CAPABLE) - adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED; - else - adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED; - } - - /* Set the RX buffer length according to the mode */ - if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { - /* PSRTYPE must be initialized in 82599 */ - u32 psrtype = IXGBE_PSRTYPE_TCPHDR | - IXGBE_PSRTYPE_UDPHDR | - IXGBE_PSRTYPE_IPV4HDR | - IXGBE_PSRTYPE_IPV6HDR | - IXGBE_PSRTYPE_L2HDR; - IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype); - rx_buf_len = IXGBEVF_RX_HDR_SIZE; - } else { - IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0); - if (netdev->mtu <= ETH_DATA_LEN) - rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE; - else - rx_buf_len = ALIGN(max_frame, 1024); - } - - rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc); - /* Setup the HW Rx Head and Tail Descriptor Pointers and - * the Base and Length of the Rx Descriptor Ring */ - for (i = 0; i < adapter->num_rx_queues; i++) { - rdba = adapter->rx_ring[i].dma; - j = adapter->rx_ring[i].reg_idx; - IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j), - (rdba & DMA_BIT_MASK(32))); - IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32)); - IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen); - IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0); - IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0); - adapter->rx_ring[i].head = IXGBE_VFRDH(j); - adapter->rx_ring[i].tail = IXGBE_VFRDT(j); - adapter->rx_ring[i].rx_buf_len = rx_buf_len; - - ixgbevf_configure_srrctl(adapter, j); - } -} - -static void ixgbevf_vlan_rx_register(struct net_device *netdev, - struct vlan_group *grp) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - int i, j; - u32 ctrl; - - adapter->vlgrp = grp; - - for (i = 0; i < adapter->num_rx_queues; i++) { - j = adapter->rx_ring[i].reg_idx; - ctrl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)); - ctrl |= IXGBE_RXDCTL_VME; - IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), ctrl); - } -} - -static void ixgbevf_vlan_rx_add_vid(struct net_device *netdev, u16 vid) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - - /* add VID to filter table */ - if (hw->mac.ops.set_vfta) - hw->mac.ops.set_vfta(hw, vid, 0, true); -} - -static void ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - - if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) - ixgbevf_irq_disable(adapter); - - vlan_group_set_device(adapter->vlgrp, vid, NULL); - - if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) - ixgbevf_irq_enable(adapter, true, true); - - /* remove VID from filter table */ - if (hw->mac.ops.set_vfta) - hw->mac.ops.set_vfta(hw, vid, 0, false); -} - -static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter) -{ - ixgbevf_vlan_rx_register(adapter->netdev, adapter->vlgrp); - - if (adapter->vlgrp) { - u16 vid; - for (vid = 0; vid < VLAN_N_VID; vid++) { - if (!vlan_group_get_device(adapter->vlgrp, vid)) - continue; - ixgbevf_vlan_rx_add_vid(adapter->netdev, vid); - } - } -} - -/** - * ixgbevf_set_rx_mode - Multicast set - * @netdev: network interface device structure - * - * The set_rx_method entry point is called whenever the multicast address - * list or the network interface flags are updated. This routine is - * responsible for configuring the hardware for proper multicast mode. - **/ -static void ixgbevf_set_rx_mode(struct net_device *netdev) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - - /* reprogram multicast list */ - if (hw->mac.ops.update_mc_addr_list) - hw->mac.ops.update_mc_addr_list(hw, netdev); -} - -static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter) -{ - int q_idx; - struct ixgbevf_q_vector *q_vector; - int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - for (q_idx = 0; q_idx < q_vectors; q_idx++) { - struct napi_struct *napi; - q_vector = adapter->q_vector[q_idx]; - if (!q_vector->rxr_count) - continue; - napi = &q_vector->napi; - if (q_vector->rxr_count > 1) - napi->poll = &ixgbevf_clean_rxonly_many; - - napi_enable(napi); - } -} - -static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter) -{ - int q_idx; - struct ixgbevf_q_vector *q_vector; - int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - - for (q_idx = 0; q_idx < q_vectors; q_idx++) { - q_vector = adapter->q_vector[q_idx]; - if (!q_vector->rxr_count) - continue; - napi_disable(&q_vector->napi); - } -} - -static void ixgbevf_configure(struct ixgbevf_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - int i; - - ixgbevf_set_rx_mode(netdev); - - ixgbevf_restore_vlan(adapter); - - ixgbevf_configure_tx(adapter); - ixgbevf_configure_rx(adapter); - for (i = 0; i < adapter->num_rx_queues; i++) { - struct ixgbevf_ring *ring = &adapter->rx_ring[i]; - ixgbevf_alloc_rx_buffers(adapter, ring, ring->count); - ring->next_to_use = ring->count - 1; - writel(ring->next_to_use, adapter->hw.hw_addr + ring->tail); - } -} - -#define IXGBE_MAX_RX_DESC_POLL 10 -static inline void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter, - int rxr) -{ - struct ixgbe_hw *hw = &adapter->hw; - int j = adapter->rx_ring[rxr].reg_idx; - int k; - - for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) { - if (IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)) & IXGBE_RXDCTL_ENABLE) - break; - else - msleep(1); - } - if (k >= IXGBE_MAX_RX_DESC_POLL) { - hw_dbg(hw, "RXDCTL.ENABLE on Rx queue %d " - "not set within the polling period\n", rxr); - } - - ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr], - (adapter->rx_ring[rxr].count - 1)); -} - -static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter) -{ - /* Only save pre-reset stats if there are some */ - if (adapter->stats.vfgprc || adapter->stats.vfgptc) { - adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc - - adapter->stats.base_vfgprc; - adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc - - adapter->stats.base_vfgptc; - adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc - - adapter->stats.base_vfgorc; - adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc - - adapter->stats.base_vfgotc; - adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc - - adapter->stats.base_vfmprc; - } -} - -static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - - adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC); - adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB); - adapter->stats.last_vfgorc |= - (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32); - adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC); - adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB); - adapter->stats.last_vfgotc |= - (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32); - adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC); - - adapter->stats.base_vfgprc = adapter->stats.last_vfgprc; - adapter->stats.base_vfgorc = adapter->stats.last_vfgorc; - adapter->stats.base_vfgptc = adapter->stats.last_vfgptc; - adapter->stats.base_vfgotc = adapter->stats.last_vfgotc; - adapter->stats.base_vfmprc = adapter->stats.last_vfmprc; -} - -static int ixgbevf_up_complete(struct ixgbevf_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - int i, j = 0; - int num_rx_rings = adapter->num_rx_queues; - u32 txdctl, rxdctl; - - for (i = 0; i < adapter->num_tx_queues; i++) { - j = adapter->tx_ring[i].reg_idx; - txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); - /* enable WTHRESH=8 descriptors, to encourage burst writeback */ - txdctl |= (8 << 16); - IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl); - } - - for (i = 0; i < adapter->num_tx_queues; i++) { - j = adapter->tx_ring[i].reg_idx; - txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); - txdctl |= IXGBE_TXDCTL_ENABLE; - IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl); - } - - for (i = 0; i < num_rx_rings; i++) { - j = adapter->rx_ring[i].reg_idx; - rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)); - rxdctl |= IXGBE_RXDCTL_ENABLE; - IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl); - ixgbevf_rx_desc_queue_enable(adapter, i); - } - - ixgbevf_configure_msix(adapter); - - if (hw->mac.ops.set_rar) { - if (is_valid_ether_addr(hw->mac.addr)) - hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0); - else - hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0); - } - - clear_bit(__IXGBEVF_DOWN, &adapter->state); - ixgbevf_napi_enable_all(adapter); - - /* enable transmits */ - netif_tx_start_all_queues(netdev); - - ixgbevf_save_reset_stats(adapter); - ixgbevf_init_last_counter_stats(adapter); - - /* bring the link up in the watchdog, this could race with our first - * link up interrupt but shouldn't be a problem */ - adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE; - adapter->link_check_timeout = jiffies; - mod_timer(&adapter->watchdog_timer, jiffies); - return 0; -} - -int ixgbevf_up(struct ixgbevf_adapter *adapter) -{ - int err; - struct ixgbe_hw *hw = &adapter->hw; - - ixgbevf_configure(adapter); - - err = ixgbevf_up_complete(adapter); - - /* clear any pending interrupts, may auto mask */ - IXGBE_READ_REG(hw, IXGBE_VTEICR); - - ixgbevf_irq_enable(adapter, true, true); - - return err; -} - -/** - * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue - * @adapter: board private structure - * @rx_ring: ring to free buffers from - **/ -static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *rx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - unsigned long size; - unsigned int i; - - if (!rx_ring->rx_buffer_info) - return; - - /* Free all the Rx ring sk_buffs */ - for (i = 0; i < rx_ring->count; i++) { - struct ixgbevf_rx_buffer *rx_buffer_info; - - rx_buffer_info = &rx_ring->rx_buffer_info[i]; - if (rx_buffer_info->dma) { - dma_unmap_single(&pdev->dev, rx_buffer_info->dma, - rx_ring->rx_buf_len, - DMA_FROM_DEVICE); - rx_buffer_info->dma = 0; - } - if (rx_buffer_info->skb) { - struct sk_buff *skb = rx_buffer_info->skb; - rx_buffer_info->skb = NULL; - do { - struct sk_buff *this = skb; - skb = skb->prev; - dev_kfree_skb(this); - } while (skb); - } - if (!rx_buffer_info->page) - continue; - dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma, - PAGE_SIZE / 2, DMA_FROM_DEVICE); - rx_buffer_info->page_dma = 0; - put_page(rx_buffer_info->page); - rx_buffer_info->page = NULL; - rx_buffer_info->page_offset = 0; - } - - size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count; - memset(rx_ring->rx_buffer_info, 0, size); - - /* Zero out the descriptor ring */ - memset(rx_ring->desc, 0, rx_ring->size); - - rx_ring->next_to_clean = 0; - rx_ring->next_to_use = 0; - - if (rx_ring->head) - writel(0, adapter->hw.hw_addr + rx_ring->head); - if (rx_ring->tail) - writel(0, adapter->hw.hw_addr + rx_ring->tail); -} - -/** - * ixgbevf_clean_tx_ring - Free Tx Buffers - * @adapter: board private structure - * @tx_ring: ring to be cleaned - **/ -static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring) -{ - struct ixgbevf_tx_buffer *tx_buffer_info; - unsigned long size; - unsigned int i; - - if (!tx_ring->tx_buffer_info) - return; - - /* Free all the Tx ring sk_buffs */ - - for (i = 0; i < tx_ring->count; i++) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info); - } - - size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count; - memset(tx_ring->tx_buffer_info, 0, size); - - memset(tx_ring->desc, 0, tx_ring->size); - - tx_ring->next_to_use = 0; - tx_ring->next_to_clean = 0; - - if (tx_ring->head) - writel(0, adapter->hw.hw_addr + tx_ring->head); - if (tx_ring->tail) - writel(0, adapter->hw.hw_addr + tx_ring->tail); -} - -/** - * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues - * @adapter: board private structure - **/ -static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_rx_queues; i++) - ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]); -} - -/** - * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues - * @adapter: board private structure - **/ -static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) - ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]); -} - -void ixgbevf_down(struct ixgbevf_adapter *adapter) -{ - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - u32 txdctl; - int i, j; - - /* signal that we are down to the interrupt handler */ - set_bit(__IXGBEVF_DOWN, &adapter->state); - /* disable receives */ - - netif_tx_disable(netdev); - - msleep(10); - - netif_tx_stop_all_queues(netdev); - - ixgbevf_irq_disable(adapter); - - ixgbevf_napi_disable_all(adapter); - - del_timer_sync(&adapter->watchdog_timer); - /* can't call flush scheduled work here because it can deadlock - * if linkwatch_event tries to acquire the rtnl_lock which we are - * holding */ - while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK) - msleep(1); - - /* disable transmits in the hardware now that interrupts are off */ - for (i = 0; i < adapter->num_tx_queues; i++) { - j = adapter->tx_ring[i].reg_idx; - txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j)); - IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), - (txdctl & ~IXGBE_TXDCTL_ENABLE)); - } - - netif_carrier_off(netdev); - - if (!pci_channel_offline(adapter->pdev)) - ixgbevf_reset(adapter); - - ixgbevf_clean_all_tx_rings(adapter); - ixgbevf_clean_all_rx_rings(adapter); -} - -void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - - WARN_ON(in_interrupt()); - - while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state)) - msleep(1); - - /* - * Check if PF is up before re-init. If not then skip until - * later when the PF is up and ready to service requests from - * the VF via mailbox. If the VF is up and running then the - * watchdog task will continue to schedule reset tasks until - * the PF is up and running. - */ - if (!hw->mac.ops.reset_hw(hw)) { - ixgbevf_down(adapter); - ixgbevf_up(adapter); - } - - clear_bit(__IXGBEVF_RESETTING, &adapter->state); -} - -void ixgbevf_reset(struct ixgbevf_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct net_device *netdev = adapter->netdev; - - if (hw->mac.ops.reset_hw(hw)) - hw_dbg(hw, "PF still resetting\n"); - else - hw->mac.ops.init_hw(hw); - - if (is_valid_ether_addr(adapter->hw.mac.addr)) { - memcpy(netdev->dev_addr, adapter->hw.mac.addr, - netdev->addr_len); - memcpy(netdev->perm_addr, adapter->hw.mac.addr, - netdev->addr_len); - } -} - -static void ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter, - int vectors) -{ - int err, vector_threshold; - - /* We'll want at least 3 (vector_threshold): - * 1) TxQ[0] Cleanup - * 2) RxQ[0] Cleanup - * 3) Other (Link Status Change, etc.) - */ - vector_threshold = MIN_MSIX_COUNT; - - /* The more we get, the more we will assign to Tx/Rx Cleanup - * for the separate queues...where Rx Cleanup >= Tx Cleanup. - * Right now, we simply care about how many we'll get; we'll - * set them up later while requesting irq's. - */ - while (vectors >= vector_threshold) { - err = pci_enable_msix(adapter->pdev, adapter->msix_entries, - vectors); - if (!err) /* Success in acquiring all requested vectors. */ - break; - else if (err < 0) - vectors = 0; /* Nasty failure, quit now */ - else /* err == number of vectors we should try again with */ - vectors = err; - } - - if (vectors < vector_threshold) { - /* Can't allocate enough MSI-X interrupts? Oh well. - * This just means we'll go with either a single MSI - * vector or fall back to legacy interrupts. - */ - hw_dbg(&adapter->hw, - "Unable to allocate MSI-X interrupts\n"); - kfree(adapter->msix_entries); - adapter->msix_entries = NULL; - } else { - /* - * Adjust for only the vectors we'll use, which is minimum - * of max_msix_q_vectors + NON_Q_VECTORS, or the number of - * vectors we were allocated. - */ - adapter->num_msix_vectors = vectors; - } -} - -/* - * ixgbe_set_num_queues: Allocate queues for device, feature dependant - * @adapter: board private structure to initialize - * - * This is the top level queue allocation routine. The order here is very - * important, starting with the "most" number of features turned on at once, - * and ending with the smallest set of features. This way large combinations - * can be allocated if they're turned on, and smaller combinations are the - * fallthrough conditions. - * - **/ -static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter) -{ - /* Start with base case */ - adapter->num_rx_queues = 1; - adapter->num_tx_queues = 1; - adapter->num_rx_pools = adapter->num_rx_queues; - adapter->num_rx_queues_per_pool = 1; -} - -/** - * ixgbevf_alloc_queues - Allocate memory for all rings - * @adapter: board private structure to initialize - * - * We allocate one ring per queue at run-time since we don't know the - * number of queues at compile-time. The polling_netdev array is - * intended for Multiqueue, but should work fine with a single queue. - **/ -static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter) -{ - int i; - - adapter->tx_ring = kcalloc(adapter->num_tx_queues, - sizeof(struct ixgbevf_ring), GFP_KERNEL); - if (!adapter->tx_ring) - goto err_tx_ring_allocation; - - adapter->rx_ring = kcalloc(adapter->num_rx_queues, - sizeof(struct ixgbevf_ring), GFP_KERNEL); - if (!adapter->rx_ring) - goto err_rx_ring_allocation; - - for (i = 0; i < adapter->num_tx_queues; i++) { - adapter->tx_ring[i].count = adapter->tx_ring_count; - adapter->tx_ring[i].queue_index = i; - adapter->tx_ring[i].reg_idx = i; - } - - for (i = 0; i < adapter->num_rx_queues; i++) { - adapter->rx_ring[i].count = adapter->rx_ring_count; - adapter->rx_ring[i].queue_index = i; - adapter->rx_ring[i].reg_idx = i; - } - - return 0; - -err_rx_ring_allocation: - kfree(adapter->tx_ring); -err_tx_ring_allocation: - return -ENOMEM; -} - -/** - * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported - * @adapter: board private structure to initialize - * - * Attempt to configure the interrupts using the best available - * capabilities of the hardware and the kernel. - **/ -static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter) -{ - int err = 0; - int vector, v_budget; - - /* - * It's easy to be greedy for MSI-X vectors, but it really - * doesn't do us much good if we have a lot more vectors - * than CPU's. So let's be conservative and only ask for - * (roughly) twice the number of vectors as there are CPU's. - */ - v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues, - (int)(num_online_cpus() * 2)) + NON_Q_VECTORS; - - /* A failure in MSI-X entry allocation isn't fatal, but it does - * mean we disable MSI-X capabilities of the adapter. */ - adapter->msix_entries = kcalloc(v_budget, - sizeof(struct msix_entry), GFP_KERNEL); - if (!adapter->msix_entries) { - err = -ENOMEM; - goto out; - } - - for (vector = 0; vector < v_budget; vector++) - adapter->msix_entries[vector].entry = vector; - - ixgbevf_acquire_msix_vectors(adapter, v_budget); - -out: - return err; -} - -/** - * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors - * @adapter: board private structure to initialize - * - * We allocate one q_vector per queue interrupt. If allocation fails we - * return -ENOMEM. - **/ -static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter) -{ - int q_idx, num_q_vectors; - struct ixgbevf_q_vector *q_vector; - int napi_vectors; - int (*poll)(struct napi_struct *, int); - - num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - napi_vectors = adapter->num_rx_queues; - poll = &ixgbevf_clean_rxonly; - - for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { - q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL); - if (!q_vector) - goto err_out; - q_vector->adapter = adapter; - q_vector->v_idx = q_idx; - q_vector->eitr = adapter->eitr_param; - if (q_idx < napi_vectors) - netif_napi_add(adapter->netdev, &q_vector->napi, - (*poll), 64); - adapter->q_vector[q_idx] = q_vector; - } - - return 0; - -err_out: - while (q_idx) { - q_idx--; - q_vector = adapter->q_vector[q_idx]; - netif_napi_del(&q_vector->napi); - kfree(q_vector); - adapter->q_vector[q_idx] = NULL; - } - return -ENOMEM; -} - -/** - * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors - * @adapter: board private structure to initialize - * - * This function frees the memory allocated to the q_vectors. In addition if - * NAPI is enabled it will delete any references to the NAPI struct prior - * to freeing the q_vector. - **/ -static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter) -{ - int q_idx, num_q_vectors; - int napi_vectors; - - num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; - napi_vectors = adapter->num_rx_queues; - - for (q_idx = 0; q_idx < num_q_vectors; q_idx++) { - struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx]; - - adapter->q_vector[q_idx] = NULL; - if (q_idx < napi_vectors) - netif_napi_del(&q_vector->napi); - kfree(q_vector); - } -} - -/** - * ixgbevf_reset_interrupt_capability - Reset MSIX setup - * @adapter: board private structure - * - **/ -static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter) -{ - pci_disable_msix(adapter->pdev); - kfree(adapter->msix_entries); - adapter->msix_entries = NULL; -} - -/** - * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init - * @adapter: board private structure to initialize - * - **/ -static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter) -{ - int err; - - /* Number of supported queues */ - ixgbevf_set_num_queues(adapter); - - err = ixgbevf_set_interrupt_capability(adapter); - if (err) { - hw_dbg(&adapter->hw, - "Unable to setup interrupt capabilities\n"); - goto err_set_interrupt; - } - - err = ixgbevf_alloc_q_vectors(adapter); - if (err) { - hw_dbg(&adapter->hw, "Unable to allocate memory for queue " - "vectors\n"); - goto err_alloc_q_vectors; - } - - err = ixgbevf_alloc_queues(adapter); - if (err) { - printk(KERN_ERR "Unable to allocate memory for queues\n"); - goto err_alloc_queues; - } - - hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, " - "Tx Queue count = %u\n", - (adapter->num_rx_queues > 1) ? "Enabled" : - "Disabled", adapter->num_rx_queues, adapter->num_tx_queues); - - set_bit(__IXGBEVF_DOWN, &adapter->state); - - return 0; -err_alloc_queues: - ixgbevf_free_q_vectors(adapter); -err_alloc_q_vectors: - ixgbevf_reset_interrupt_capability(adapter); -err_set_interrupt: - return err; -} - -/** - * ixgbevf_sw_init - Initialize general software structures - * (struct ixgbevf_adapter) - * @adapter: board private structure to initialize - * - * ixgbevf_sw_init initializes the Adapter private data structure. - * Fields are initialized based on PCI device information and - * OS network device settings (MTU size). - **/ -static int __devinit ixgbevf_sw_init(struct ixgbevf_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - struct pci_dev *pdev = adapter->pdev; - int err; - - /* PCI config space info */ - - hw->vendor_id = pdev->vendor; - hw->device_id = pdev->device; - pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id); - hw->subsystem_vendor_id = pdev->subsystem_vendor; - hw->subsystem_device_id = pdev->subsystem_device; - - hw->mbx.ops.init_params(hw); - hw->mac.max_tx_queues = MAX_TX_QUEUES; - hw->mac.max_rx_queues = MAX_RX_QUEUES; - err = hw->mac.ops.reset_hw(hw); - if (err) { - dev_info(&pdev->dev, - "PF still in reset state, assigning new address\n"); - dev_hw_addr_random(adapter->netdev, hw->mac.addr); - } else { - err = hw->mac.ops.init_hw(hw); - if (err) { - printk(KERN_ERR "init_shared_code failed: %d\n", err); - goto out; - } - } - - /* Enable dynamic interrupt throttling rates */ - adapter->eitr_param = 20000; - adapter->itr_setting = 1; - - /* set defaults for eitr in MegaBytes */ - adapter->eitr_low = 10; - adapter->eitr_high = 20; - - /* set default ring sizes */ - adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD; - adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD; - - /* enable rx csum by default */ - adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED; - - set_bit(__IXGBEVF_DOWN, &adapter->state); - -out: - return err; -} - -#define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \ - { \ - u32 current_counter = IXGBE_READ_REG(hw, reg); \ - if (current_counter < last_counter) \ - counter += 0x100000000LL; \ - last_counter = current_counter; \ - counter &= 0xFFFFFFFF00000000LL; \ - counter |= current_counter; \ - } - -#define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \ - { \ - u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \ - u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \ - u64 current_counter = (current_counter_msb << 32) | \ - current_counter_lsb; \ - if (current_counter < last_counter) \ - counter += 0x1000000000LL; \ - last_counter = current_counter; \ - counter &= 0xFFFFFFF000000000LL; \ - counter |= current_counter; \ - } -/** - * ixgbevf_update_stats - Update the board statistics counters. - * @adapter: board private structure - **/ -void ixgbevf_update_stats(struct ixgbevf_adapter *adapter) -{ - struct ixgbe_hw *hw = &adapter->hw; - - UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc, - adapter->stats.vfgprc); - UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc, - adapter->stats.vfgptc); - UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB, - adapter->stats.last_vfgorc, - adapter->stats.vfgorc); - UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB, - adapter->stats.last_vfgotc, - adapter->stats.vfgotc); - UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc, - adapter->stats.vfmprc); - - /* Fill out the OS statistics structure */ - adapter->netdev->stats.multicast = adapter->stats.vfmprc - - adapter->stats.base_vfmprc; -} - -/** - * ixgbevf_watchdog - Timer Call-back - * @data: pointer to adapter cast into an unsigned long - **/ -static void ixgbevf_watchdog(unsigned long data) -{ - struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data; - struct ixgbe_hw *hw = &adapter->hw; - u64 eics = 0; - int i; - - /* - * Do the watchdog outside of interrupt context due to the lovely - * delays that some of the newer hardware requires - */ - - if (test_bit(__IXGBEVF_DOWN, &adapter->state)) - goto watchdog_short_circuit; - - /* get one bit for every active tx/rx interrupt vector */ - for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) { - struct ixgbevf_q_vector *qv = adapter->q_vector[i]; - if (qv->rxr_count || qv->txr_count) - eics |= (1 << i); - } - - IXGBE_WRITE_REG(hw, IXGBE_VTEICS, (u32)eics); - -watchdog_short_circuit: - schedule_work(&adapter->watchdog_task); -} - -/** - * ixgbevf_tx_timeout - Respond to a Tx Hang - * @netdev: network interface device structure - **/ -static void ixgbevf_tx_timeout(struct net_device *netdev) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - - /* Do the reset outside of interrupt context */ - schedule_work(&adapter->reset_task); -} - -static void ixgbevf_reset_task(struct work_struct *work) -{ - struct ixgbevf_adapter *adapter; - adapter = container_of(work, struct ixgbevf_adapter, reset_task); - - /* If we're already down or resetting, just bail */ - if (test_bit(__IXGBEVF_DOWN, &adapter->state) || - test_bit(__IXGBEVF_RESETTING, &adapter->state)) - return; - - adapter->tx_timeout_count++; - - ixgbevf_reinit_locked(adapter); -} - -/** - * ixgbevf_watchdog_task - worker thread to bring link up - * @work: pointer to work_struct containing our data - **/ -static void ixgbevf_watchdog_task(struct work_struct *work) -{ - struct ixgbevf_adapter *adapter = container_of(work, - struct ixgbevf_adapter, - watchdog_task); - struct net_device *netdev = adapter->netdev; - struct ixgbe_hw *hw = &adapter->hw; - u32 link_speed = adapter->link_speed; - bool link_up = adapter->link_up; - - adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK; - - /* - * Always check the link on the watchdog because we have - * no LSC interrupt - */ - if (hw->mac.ops.check_link) { - if ((hw->mac.ops.check_link(hw, &link_speed, - &link_up, false)) != 0) { - adapter->link_up = link_up; - adapter->link_speed = link_speed; - netif_carrier_off(netdev); - netif_tx_stop_all_queues(netdev); - schedule_work(&adapter->reset_task); - goto pf_has_reset; - } - } else { - /* always assume link is up, if no check link - * function */ - link_speed = IXGBE_LINK_SPEED_10GB_FULL; - link_up = true; - } - adapter->link_up = link_up; - adapter->link_speed = link_speed; - - if (link_up) { - if (!netif_carrier_ok(netdev)) { - hw_dbg(&adapter->hw, "NIC Link is Up, %u Gbps\n", - (link_speed == IXGBE_LINK_SPEED_10GB_FULL) ? - 10 : 1); - netif_carrier_on(netdev); - netif_tx_wake_all_queues(netdev); - } else { - /* Force detection of hung controller */ - adapter->detect_tx_hung = true; - } - } else { - adapter->link_up = false; - adapter->link_speed = 0; - if (netif_carrier_ok(netdev)) { - hw_dbg(&adapter->hw, "NIC Link is Down\n"); - netif_carrier_off(netdev); - netif_tx_stop_all_queues(netdev); - } - } - - ixgbevf_update_stats(adapter); - -pf_has_reset: - /* Force detection of hung controller every watchdog period */ - adapter->detect_tx_hung = true; - - /* Reset the timer */ - if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) - mod_timer(&adapter->watchdog_timer, - round_jiffies(jiffies + (2 * HZ))); - - adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK; -} - -/** - * ixgbevf_free_tx_resources - Free Tx Resources per Queue - * @adapter: board private structure - * @tx_ring: Tx descriptor ring for a specific queue - * - * Free all transmit software resources - **/ -void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - - ixgbevf_clean_tx_ring(adapter, tx_ring); - - vfree(tx_ring->tx_buffer_info); - tx_ring->tx_buffer_info = NULL; - - dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, - tx_ring->dma); - - tx_ring->desc = NULL; -} - -/** - * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues - * @adapter: board private structure - * - * Free all transmit software resources - **/ -static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_tx_queues; i++) - if (adapter->tx_ring[i].desc) - ixgbevf_free_tx_resources(adapter, - &adapter->tx_ring[i]); - -} - -/** - * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors) - * @adapter: board private structure - * @tx_ring: tx descriptor ring (for a specific queue) to setup - * - * Return 0 on success, negative on failure - **/ -int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - int size; - - size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count; - tx_ring->tx_buffer_info = 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(&pdev->dev, tx_ring->size, - &tx_ring->dma, GFP_KERNEL); - if (!tx_ring->desc) - goto err; - - tx_ring->next_to_use = 0; - tx_ring->next_to_clean = 0; - tx_ring->work_limit = tx_ring->count; - return 0; - -err: - vfree(tx_ring->tx_buffer_info); - tx_ring->tx_buffer_info = NULL; - hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit " - "descriptor ring\n"); - return -ENOMEM; -} - -/** - * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources - * @adapter: board private structure - * - * If this function returns with an error, then it's possible one or - * more of the rings is populated (while the rest are not). It is the - * callers duty to clean those orphaned rings. - * - * Return 0 on success, negative on failure - **/ -static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter) -{ - int i, err = 0; - - for (i = 0; i < adapter->num_tx_queues; i++) { - err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]); - if (!err) - continue; - hw_dbg(&adapter->hw, - "Allocation for Tx Queue %u failed\n", i); - break; - } - - return err; -} - -/** - * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors) - * @adapter: board private structure - * @rx_ring: rx descriptor ring (for a specific queue) to setup - * - * Returns 0 on success, negative on failure - **/ -int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *rx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - int size; - - size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count; - rx_ring->rx_buffer_info = vzalloc(size); - if (!rx_ring->rx_buffer_info) { - hw_dbg(&adapter->hw, - "Unable to vmalloc buffer memory for " - "the receive descriptor ring\n"); - goto alloc_failed; - } - - /* Round up to nearest 4K */ - rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc); - rx_ring->size = ALIGN(rx_ring->size, 4096); - - rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size, - &rx_ring->dma, GFP_KERNEL); - - if (!rx_ring->desc) { - hw_dbg(&adapter->hw, - "Unable to allocate memory for " - "the receive descriptor ring\n"); - vfree(rx_ring->rx_buffer_info); - rx_ring->rx_buffer_info = NULL; - goto alloc_failed; - } - - rx_ring->next_to_clean = 0; - rx_ring->next_to_use = 0; - - return 0; -alloc_failed: - return -ENOMEM; -} - -/** - * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources - * @adapter: board private structure - * - * If this function returns with an error, then it's possible one or - * more of the rings is populated (while the rest are not). It is the - * callers duty to clean those orphaned rings. - * - * Return 0 on success, negative on failure - **/ -static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter) -{ - int i, err = 0; - - for (i = 0; i < adapter->num_rx_queues; i++) { - err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]); - if (!err) - continue; - hw_dbg(&adapter->hw, - "Allocation for Rx Queue %u failed\n", i); - break; - } - return err; -} - -/** - * ixgbevf_free_rx_resources - Free Rx Resources - * @adapter: board private structure - * @rx_ring: ring to clean the resources from - * - * Free all receive software resources - **/ -void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *rx_ring) -{ - struct pci_dev *pdev = adapter->pdev; - - ixgbevf_clean_rx_ring(adapter, rx_ring); - - vfree(rx_ring->rx_buffer_info); - rx_ring->rx_buffer_info = NULL; - - dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, - rx_ring->dma); - - rx_ring->desc = NULL; -} - -/** - * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues - * @adapter: board private structure - * - * Free all receive software resources - **/ -static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter) -{ - int i; - - for (i = 0; i < adapter->num_rx_queues; i++) - if (adapter->rx_ring[i].desc) - ixgbevf_free_rx_resources(adapter, - &adapter->rx_ring[i]); -} - -/** - * ixgbevf_open - Called when a network interface is made active - * @netdev: network interface device structure - * - * Returns 0 on success, negative value on failure - * - * The open entry point is called when a network interface is made - * active by the system (IFF_UP). At this point all resources needed - * for transmit and receive operations are allocated, the interrupt - * handler is registered with the OS, the watchdog timer is started, - * and the stack is notified that the interface is ready. - **/ -static int ixgbevf_open(struct net_device *netdev) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - struct ixgbe_hw *hw = &adapter->hw; - int err; - - /* disallow open during test */ - if (test_bit(__IXGBEVF_TESTING, &adapter->state)) - return -EBUSY; - - if (hw->adapter_stopped) { - ixgbevf_reset(adapter); - /* if adapter is still stopped then PF isn't up and - * the vf can't start. */ - if (hw->adapter_stopped) { - err = IXGBE_ERR_MBX; - printk(KERN_ERR "Unable to start - perhaps the PF" - " Driver isn't up yet\n"); - goto err_setup_reset; - } - } - - /* allocate transmit descriptors */ - err = ixgbevf_setup_all_tx_resources(adapter); - if (err) - goto err_setup_tx; - - /* allocate receive descriptors */ - err = ixgbevf_setup_all_rx_resources(adapter); - if (err) - goto err_setup_rx; - - ixgbevf_configure(adapter); - - /* - * Map the Tx/Rx rings to the vectors we were allotted. - * if request_irq will be called in this function map_rings - * must be called *before* up_complete - */ - ixgbevf_map_rings_to_vectors(adapter); - - err = ixgbevf_up_complete(adapter); - if (err) - goto err_up; - - /* clear any pending interrupts, may auto mask */ - IXGBE_READ_REG(hw, IXGBE_VTEICR); - err = ixgbevf_request_irq(adapter); - if (err) - goto err_req_irq; - - ixgbevf_irq_enable(adapter, true, true); - - return 0; - -err_req_irq: - ixgbevf_down(adapter); -err_up: - ixgbevf_free_irq(adapter); -err_setup_rx: - ixgbevf_free_all_rx_resources(adapter); -err_setup_tx: - ixgbevf_free_all_tx_resources(adapter); - ixgbevf_reset(adapter); - -err_setup_reset: - - return err; -} - -/** - * ixgbevf_close - Disables a network interface - * @netdev: network interface device structure - * - * Returns 0, this is not allowed to fail - * - * The close entry point is called when an interface is de-activated - * by the OS. The hardware is still under the drivers control, but - * needs to be disabled. A global MAC reset is issued to stop the - * hardware, and all transmit and receive resources are freed. - **/ -static int ixgbevf_close(struct net_device *netdev) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - - ixgbevf_down(adapter); - ixgbevf_free_irq(adapter); - - ixgbevf_free_all_tx_resources(adapter); - ixgbevf_free_all_rx_resources(adapter); - - return 0; -} - -static int ixgbevf_tso(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring, - struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) -{ - struct ixgbe_adv_tx_context_desc *context_desc; - unsigned int i; - int err; - struct ixgbevf_tx_buffer *tx_buffer_info; - u32 vlan_macip_lens = 0, type_tucmd_mlhl; - u32 mss_l4len_idx, l4len; - - if (skb_is_gso(skb)) { - if (skb_header_cloned(skb)) { - err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); - if (err) - return err; - } - l4len = tcp_hdrlen(skb); - *hdr_len += l4len; - - if (skb->protocol == htons(ETH_P_IP)) { - struct iphdr *iph = ip_hdr(skb); - iph->tot_len = 0; - iph->check = 0; - tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, - iph->daddr, 0, - IPPROTO_TCP, - 0); - adapter->hw_tso_ctxt++; - } else if (skb_is_gso_v6(skb)) { - ipv6_hdr(skb)->payload_len = 0; - tcp_hdr(skb)->check = - ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, - &ipv6_hdr(skb)->daddr, - 0, IPPROTO_TCP, 0); - adapter->hw_tso6_ctxt++; - } - - i = tx_ring->next_to_use; - - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i); - - /* VLAN MACLEN IPLEN */ - if (tx_flags & IXGBE_TX_FLAGS_VLAN) - vlan_macip_lens |= - (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK); - vlan_macip_lens |= ((skb_network_offset(skb)) << - IXGBE_ADVTXD_MACLEN_SHIFT); - *hdr_len += skb_network_offset(skb); - vlan_macip_lens |= - (skb_transport_header(skb) - skb_network_header(skb)); - *hdr_len += - (skb_transport_header(skb) - skb_network_header(skb)); - context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); - context_desc->seqnum_seed = 0; - - /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ - type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT | - IXGBE_ADVTXD_DTYP_CTXT); - - if (skb->protocol == htons(ETH_P_IP)) - type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4; - type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP; - context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl); - - /* MSS L4LEN IDX */ - mss_l4len_idx = - (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT); - mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT); - /* use index 1 for TSO */ - mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT); - context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); - - tx_buffer_info->time_stamp = jiffies; - tx_buffer_info->next_to_watch = i; - - i++; - if (i == tx_ring->count) - i = 0; - tx_ring->next_to_use = i; - - return true; - } - - return false; -} - -static bool ixgbevf_tx_csum(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring, - struct sk_buff *skb, u32 tx_flags) -{ - struct ixgbe_adv_tx_context_desc *context_desc; - unsigned int i; - struct ixgbevf_tx_buffer *tx_buffer_info; - u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0; - - if (skb->ip_summed == CHECKSUM_PARTIAL || - (tx_flags & IXGBE_TX_FLAGS_VLAN)) { - i = tx_ring->next_to_use; - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i); - - if (tx_flags & IXGBE_TX_FLAGS_VLAN) - vlan_macip_lens |= (tx_flags & - IXGBE_TX_FLAGS_VLAN_MASK); - vlan_macip_lens |= (skb_network_offset(skb) << - IXGBE_ADVTXD_MACLEN_SHIFT); - if (skb->ip_summed == CHECKSUM_PARTIAL) - vlan_macip_lens |= (skb_transport_header(skb) - - skb_network_header(skb)); - - context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); - context_desc->seqnum_seed = 0; - - type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT | - IXGBE_ADVTXD_DTYP_CTXT); - - if (skb->ip_summed == CHECKSUM_PARTIAL) { - switch (skb->protocol) { - case __constant_htons(ETH_P_IP): - type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4; - if (ip_hdr(skb)->protocol == IPPROTO_TCP) - type_tucmd_mlhl |= - IXGBE_ADVTXD_TUCMD_L4T_TCP; - break; - case __constant_htons(ETH_P_IPV6): - /* XXX what about other V6 headers?? */ - if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) - type_tucmd_mlhl |= - IXGBE_ADVTXD_TUCMD_L4T_TCP; - break; - default: - if (unlikely(net_ratelimit())) { - printk(KERN_WARNING - "partial checksum but " - "proto=%x!\n", - skb->protocol); - } - break; - } - } - - context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl); - /* use index zero for tx checksum offload */ - context_desc->mss_l4len_idx = 0; - - tx_buffer_info->time_stamp = jiffies; - tx_buffer_info->next_to_watch = i; - - adapter->hw_csum_tx_good++; - i++; - if (i == tx_ring->count) - i = 0; - tx_ring->next_to_use = i; - - return true; - } - - return false; -} - -static int ixgbevf_tx_map(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring, - struct sk_buff *skb, u32 tx_flags, - unsigned int first) -{ - struct pci_dev *pdev = adapter->pdev; - struct ixgbevf_tx_buffer *tx_buffer_info; - unsigned int len; - unsigned int total = skb->len; - unsigned int offset = 0, size; - int count = 0; - unsigned int nr_frags = skb_shinfo(skb)->nr_frags; - unsigned int f; - int i; - - i = tx_ring->next_to_use; - - len = min(skb_headlen(skb), total); - while (len) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD); - - tx_buffer_info->length = size; - tx_buffer_info->mapped_as_page = false; - tx_buffer_info->dma = dma_map_single(&adapter->pdev->dev, - skb->data + offset, - size, DMA_TO_DEVICE); - if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma)) - goto dma_error; - tx_buffer_info->time_stamp = jiffies; - tx_buffer_info->next_to_watch = i; - - len -= size; - total -= size; - offset += size; - count++; - i++; - if (i == tx_ring->count) - i = 0; - } - - for (f = 0; f < nr_frags; f++) { - struct skb_frag_struct *frag; - - frag = &skb_shinfo(skb)->frags[f]; - len = min((unsigned int)frag->size, total); - offset = frag->page_offset; - - while (len) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD); - - tx_buffer_info->length = size; - tx_buffer_info->dma = dma_map_page(&adapter->pdev->dev, - frag->page, - offset, - size, - DMA_TO_DEVICE); - tx_buffer_info->mapped_as_page = true; - if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma)) - goto dma_error; - tx_buffer_info->time_stamp = jiffies; - tx_buffer_info->next_to_watch = i; - - len -= size; - total -= size; - offset += size; - count++; - i++; - if (i == tx_ring->count) - i = 0; - } - if (total == 0) - break; - } - - if (i == 0) - i = tx_ring->count - 1; - else - i = i - 1; - tx_ring->tx_buffer_info[i].skb = skb; - tx_ring->tx_buffer_info[first].next_to_watch = i; - - return count; - -dma_error: - dev_err(&pdev->dev, "TX DMA map failed\n"); - - /* clear timestamp and dma mappings for failed tx_buffer_info map */ - tx_buffer_info->dma = 0; - tx_buffer_info->time_stamp = 0; - tx_buffer_info->next_to_watch = 0; - count--; - - /* clear timestamp and dma mappings for remaining portion of packet */ - while (count >= 0) { - count--; - i--; - if (i < 0) - i += tx_ring->count; - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info); - } - - return count; -} - -static void ixgbevf_tx_queue(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *tx_ring, int tx_flags, - int count, u32 paylen, u8 hdr_len) -{ - union ixgbe_adv_tx_desc *tx_desc = NULL; - struct ixgbevf_tx_buffer *tx_buffer_info; - u32 olinfo_status = 0, cmd_type_len = 0; - unsigned int i; - - u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS; - - cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA; - - cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT; - - if (tx_flags & IXGBE_TX_FLAGS_VLAN) - cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE; - - if (tx_flags & IXGBE_TX_FLAGS_TSO) { - cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE; - - olinfo_status |= IXGBE_TXD_POPTS_TXSM << - IXGBE_ADVTXD_POPTS_SHIFT; - - /* use index 1 context for tso */ - olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT); - if (tx_flags & IXGBE_TX_FLAGS_IPV4) - olinfo_status |= IXGBE_TXD_POPTS_IXSM << - IXGBE_ADVTXD_POPTS_SHIFT; - - } else if (tx_flags & IXGBE_TX_FLAGS_CSUM) - olinfo_status |= IXGBE_TXD_POPTS_TXSM << - IXGBE_ADVTXD_POPTS_SHIFT; - - olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT); - - i = tx_ring->next_to_use; - while (count--) { - tx_buffer_info = &tx_ring->tx_buffer_info[i]; - tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i); - tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma); - tx_desc->read.cmd_type_len = - cpu_to_le32(cmd_type_len | tx_buffer_info->length); - tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); - i++; - if (i == tx_ring->count) - i = 0; - } - - tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd); - - /* - * Force memory writes to complete before letting h/w - * know there are new descriptors to fetch. (Only - * applicable for weak-ordered memory model archs, - * such as IA-64). - */ - wmb(); - - tx_ring->next_to_use = i; - writel(i, adapter->hw.hw_addr + tx_ring->tail); -} - -static int __ixgbevf_maybe_stop_tx(struct net_device *netdev, - struct ixgbevf_ring *tx_ring, int size) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - - netif_stop_subqueue(netdev, tx_ring->queue_index); - /* Herbert's original patch had: - * smp_mb__after_netif_stop_queue(); - * but since that doesn't exist yet, just open code it. */ - smp_mb(); - - /* We need to check again in a case another CPU has just - * made room available. */ - if (likely(IXGBE_DESC_UNUSED(tx_ring) < size)) - return -EBUSY; - - /* A reprieve! - use start_queue because it doesn't call schedule */ - netif_start_subqueue(netdev, tx_ring->queue_index); - ++adapter->restart_queue; - return 0; -} - -static int ixgbevf_maybe_stop_tx(struct net_device *netdev, - struct ixgbevf_ring *tx_ring, int size) -{ - if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size)) - return 0; - return __ixgbevf_maybe_stop_tx(netdev, tx_ring, size); -} - -static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - struct ixgbevf_ring *tx_ring; - unsigned int first; - unsigned int tx_flags = 0; - u8 hdr_len = 0; - int r_idx = 0, tso; - int count = 0; - - unsigned int f; - - tx_ring = &adapter->tx_ring[r_idx]; - - if (vlan_tx_tag_present(skb)) { - tx_flags |= vlan_tx_tag_get(skb); - tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT; - tx_flags |= IXGBE_TX_FLAGS_VLAN; - } - - /* four things can cause us to need a context descriptor */ - if (skb_is_gso(skb) || - (skb->ip_summed == CHECKSUM_PARTIAL) || - (tx_flags & IXGBE_TX_FLAGS_VLAN)) - count++; - - count += TXD_USE_COUNT(skb_headlen(skb)); - for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) - count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); - - if (ixgbevf_maybe_stop_tx(netdev, tx_ring, count)) { - adapter->tx_busy++; - return NETDEV_TX_BUSY; - } - - first = tx_ring->next_to_use; - - if (skb->protocol == htons(ETH_P_IP)) - tx_flags |= IXGBE_TX_FLAGS_IPV4; - tso = ixgbevf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len); - if (tso < 0) { - dev_kfree_skb_any(skb); - return NETDEV_TX_OK; - } - - if (tso) - tx_flags |= IXGBE_TX_FLAGS_TSO; - else if (ixgbevf_tx_csum(adapter, tx_ring, skb, tx_flags) && - (skb->ip_summed == CHECKSUM_PARTIAL)) - tx_flags |= IXGBE_TX_FLAGS_CSUM; - - ixgbevf_tx_queue(adapter, tx_ring, tx_flags, - ixgbevf_tx_map(adapter, tx_ring, skb, tx_flags, first), - skb->len, hdr_len); - - ixgbevf_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED); - - 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); - - if (hw->mac.ops.set_rar) - hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0); - - return 0; -} - -/** - * ixgbevf_change_mtu - Change the Maximum Transfer Unit - * @netdev: network interface device structure - * @new_mtu: new value for maximum frame size - * - * Returns 0 on success, negative on failure - **/ -static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu) -{ - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; - - /* MTU < 68 is an error and causes problems on some kernels */ - if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE)) - return -EINVAL; - - hw_dbg(&adapter->hw, "changing MTU from %d to %d\n", - netdev->mtu, new_mtu); - /* must set new MTU before calling down or up */ - netdev->mtu = new_mtu; - - if (netif_running(netdev)) - ixgbevf_reinit_locked(adapter); - - return 0; -} - -static void ixgbevf_shutdown(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - - netif_device_detach(netdev); - - if (netif_running(netdev)) { - ixgbevf_down(adapter); - ixgbevf_free_irq(adapter); - ixgbevf_free_all_tx_resources(adapter); - ixgbevf_free_all_rx_resources(adapter); - } - -#ifdef CONFIG_PM - pci_save_state(pdev); -#endif - - pci_disable_device(pdev); -} - -static const struct net_device_ops ixgbe_netdev_ops = { - .ndo_open = &ixgbevf_open, - .ndo_stop = &ixgbevf_close, - .ndo_start_xmit = &ixgbevf_xmit_frame, - .ndo_set_rx_mode = &ixgbevf_set_rx_mode, - .ndo_set_multicast_list = &ixgbevf_set_rx_mode, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = &ixgbevf_set_mac, - .ndo_change_mtu = &ixgbevf_change_mtu, - .ndo_tx_timeout = &ixgbevf_tx_timeout, - .ndo_vlan_rx_register = &ixgbevf_vlan_rx_register, - .ndo_vlan_rx_add_vid = &ixgbevf_vlan_rx_add_vid, - .ndo_vlan_rx_kill_vid = &ixgbevf_vlan_rx_kill_vid, -}; - -static void ixgbevf_assign_netdev_ops(struct net_device *dev) -{ - struct ixgbevf_adapter *adapter; - adapter = netdev_priv(dev); - dev->netdev_ops = &ixgbe_netdev_ops; - ixgbevf_set_ethtool_ops(dev); - dev->watchdog_timeo = 5 * HZ; -} - -/** - * ixgbevf_probe - Device Initialization Routine - * @pdev: PCI device information struct - * @ent: entry in ixgbevf_pci_tbl - * - * Returns 0 on success, negative on failure - * - * ixgbevf_probe initializes an adapter identified by a pci_dev structure. - * The OS initialization, configuring of the adapter private structure, - * and a hardware reset occur. - **/ -static int __devinit ixgbevf_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - struct net_device *netdev; - struct ixgbevf_adapter *adapter = NULL; - struct ixgbe_hw *hw = NULL; - const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data]; - static int cards_found; - int err, pci_using_dac; - - err = pci_enable_device(pdev); - if (err) - return err; - - if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) && - !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) { - pci_using_dac = 1; - } else { - err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); - if (err) { - err = dma_set_coherent_mask(&pdev->dev, - DMA_BIT_MASK(32)); - if (err) { - dev_err(&pdev->dev, "No usable DMA " - "configuration, aborting\n"); - goto err_dma; - } - } - pci_using_dac = 0; - } - - err = pci_request_regions(pdev, ixgbevf_driver_name); - if (err) { - dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err); - goto err_pci_reg; - } - - pci_set_master(pdev); - -#ifdef HAVE_TX_MQ - netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter), - MAX_TX_QUEUES); -#else - netdev = alloc_etherdev(sizeof(struct ixgbevf_adapter)); -#endif - if (!netdev) { - err = -ENOMEM; - goto err_alloc_etherdev; - } - - SET_NETDEV_DEV(netdev, &pdev->dev); - - pci_set_drvdata(pdev, netdev); - adapter = netdev_priv(netdev); - - adapter->netdev = netdev; - adapter->pdev = pdev; - hw = &adapter->hw; - hw->back = adapter; - adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1; - - /* - * call save state here in standalone driver because it relies on - * adapter struct to exist, and needs to call netdev_priv - */ - pci_save_state(pdev); - - hw->hw_addr = ioremap(pci_resource_start(pdev, 0), - pci_resource_len(pdev, 0)); - if (!hw->hw_addr) { - err = -EIO; - goto err_ioremap; - } - - ixgbevf_assign_netdev_ops(netdev); - - adapter->bd_number = cards_found; - - /* Setup hw api */ - memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops)); - hw->mac.type = ii->mac; - - memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops, - sizeof(struct ixgbe_mac_operations)); - - adapter->flags &= ~IXGBE_FLAG_RX_PS_CAPABLE; - adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED; - adapter->flags |= IXGBE_FLAG_RX_1BUF_CAPABLE; - - /* setup the private structure */ - err = ixgbevf_sw_init(adapter); - - netdev->features = NETIF_F_SG | - NETIF_F_IP_CSUM | - NETIF_F_HW_VLAN_TX | - NETIF_F_HW_VLAN_RX | - NETIF_F_HW_VLAN_FILTER; - - netdev->features |= NETIF_F_IPV6_CSUM; - netdev->features |= NETIF_F_TSO; - netdev->features |= NETIF_F_TSO6; - netdev->features |= NETIF_F_GRO; - netdev->vlan_features |= NETIF_F_TSO; - netdev->vlan_features |= NETIF_F_TSO6; - netdev->vlan_features |= NETIF_F_IP_CSUM; - netdev->vlan_features |= NETIF_F_IPV6_CSUM; - netdev->vlan_features |= NETIF_F_SG; - - if (pci_using_dac) - netdev->features |= NETIF_F_HIGHDMA; - - /* The HW MAC address was set and/or determined in sw_init */ - memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); - memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len); - - if (!is_valid_ether_addr(netdev->dev_addr)) { - printk(KERN_ERR "invalid MAC address\n"); - err = -EIO; - goto err_sw_init; - } - - init_timer(&adapter->watchdog_timer); - adapter->watchdog_timer.function = ixgbevf_watchdog; - adapter->watchdog_timer.data = (unsigned long)adapter; - - INIT_WORK(&adapter->reset_task, ixgbevf_reset_task); - INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task); - - err = ixgbevf_init_interrupt_scheme(adapter); - if (err) - goto err_sw_init; - - /* pick up the PCI bus settings for reporting later */ - if (hw->mac.ops.get_bus_info) - hw->mac.ops.get_bus_info(hw); - - strcpy(netdev->name, "eth%d"); - - err = register_netdev(netdev); - if (err) - goto err_register; - - adapter->netdev_registered = true; - - netif_carrier_off(netdev); - - ixgbevf_init_last_counter_stats(adapter); - - /* print the MAC address */ - hw_dbg(hw, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", - netdev->dev_addr[0], - netdev->dev_addr[1], - netdev->dev_addr[2], - netdev->dev_addr[3], - netdev->dev_addr[4], - netdev->dev_addr[5]); - - hw_dbg(hw, "MAC: %d\n", hw->mac.type); - - hw_dbg(hw, "LRO is disabled\n"); - - hw_dbg(hw, "Intel(R) 82599 Virtual Function\n"); - cards_found++; - return 0; - -err_register: -err_sw_init: - ixgbevf_reset_interrupt_capability(adapter); - iounmap(hw->hw_addr); -err_ioremap: - free_netdev(netdev); -err_alloc_etherdev: - pci_release_regions(pdev); -err_pci_reg: -err_dma: - pci_disable_device(pdev); - return err; -} - -/** - * ixgbevf_remove - Device Removal Routine - * @pdev: PCI device information struct - * - * ixgbevf_remove is called by the PCI subsystem to alert the driver - * that it should release a PCI device. The could be caused by a - * Hot-Plug event, or because the driver is going to be removed from - * memory. - **/ -static void __devexit ixgbevf_remove(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct ixgbevf_adapter *adapter = netdev_priv(netdev); - - set_bit(__IXGBEVF_DOWN, &adapter->state); - - del_timer_sync(&adapter->watchdog_timer); - - cancel_work_sync(&adapter->watchdog_task); - - flush_scheduled_work(); - - if (adapter->netdev_registered) { - unregister_netdev(netdev); - adapter->netdev_registered = false; - } - - ixgbevf_reset_interrupt_capability(adapter); - - iounmap(adapter->hw.hw_addr); - pci_release_regions(pdev); - - hw_dbg(&adapter->hw, "Remove complete\n"); - - kfree(adapter->tx_ring); - kfree(adapter->rx_ring); - - free_netdev(netdev); - - pci_disable_device(pdev); -} - -static struct pci_driver ixgbevf_driver = { - .name = ixgbevf_driver_name, - .id_table = ixgbevf_pci_tbl, - .probe = ixgbevf_probe, - .remove = __devexit_p(ixgbevf_remove), - .shutdown = ixgbevf_shutdown, -}; - -/** - * ixgbe_init_module - Driver Registration Routine - * - * ixgbe_init_module is the first routine called when the driver is - * loaded. All it does is register with the PCI subsystem. - **/ -static int __init ixgbevf_init_module(void) -{ - int ret; - printk(KERN_INFO "ixgbevf: %s - version %s\n", ixgbevf_driver_string, - ixgbevf_driver_version); - - printk(KERN_INFO "%s\n", ixgbevf_copyright); - - ret = pci_register_driver(&ixgbevf_driver); - return ret; -} - -module_init(ixgbevf_init_module); - -/** - * ixgbe_exit_module - Driver Exit Cleanup Routine - * - * ixgbe_exit_module is called just before the driver is removed - * from memory. - **/ -static void __exit ixgbevf_exit_module(void) -{ - pci_unregister_driver(&ixgbevf_driver); -} - -#ifdef DEBUG -/** - * ixgbe_get_hw_dev_name - return device name string - * used by hardware layer to print debugging information - **/ -char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw) -{ - struct ixgbevf_adapter *adapter = hw->back; - return adapter->netdev->name; -} - -#endif -module_exit(ixgbevf_exit_module); - -/* ixgbevf_main.c */ |