mbuf: remove rte_ctrlmbuf
[dpdk.git] / lib / librte_pmd_e1000 / igb_rxtx.c
index 4295539..b0112be 100644 (file)
@@ -1,13 +1,13 @@
 /*-
  *   BSD LICENSE
- * 
+ *
  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
  *   All rights reserved.
- * 
+ *
  *   Redistribution and use in source and binary forms, with or without
  *   modification, are permitted provided that the following conditions
  *   are met:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  *       notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above copyright
@@ -17,7 +17,7 @@
  *     * Neither the name of Intel Corporation nor the names of its
  *       contributors may be used to endorse or promote products derived
  *       from this software without specific prior written permission.
- * 
+ *
  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -33,7 +33,6 @@
 
 #include <sys/queue.h>
 
-#include <endian.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "e1000/e1000_api.h"
 #include "e1000_ethdev.h"
 
+#define IGB_RSS_OFFLOAD_ALL ( \
+               ETH_RSS_IPV4 | \
+               ETH_RSS_IPV4_TCP | \
+               ETH_RSS_IPV6 | \
+               ETH_RSS_IPV6_EX | \
+               ETH_RSS_IPV6_TCP | \
+               ETH_RSS_IPV6_TCP_EX | \
+               ETH_RSS_IPV4_UDP | \
+               ETH_RSS_IPV6_UDP | \
+               ETH_RSS_IPV6_UDP_EX)
+
 static inline struct rte_mbuf *
 rte_rxmbuf_alloc(struct rte_mempool *mp)
 {
        struct rte_mbuf *m;
 
        m = __rte_mbuf_raw_alloc(mp);
-       __rte_mbuf_sanity_check_raw(m, RTE_MBUF_PKT, 0);
+       __rte_mbuf_sanity_check_raw(m, 0);
        return (m);
 }
 
@@ -1079,7 +1089,7 @@ ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
        char z_name[RTE_MEMZONE_NAMESIZE];
        const struct rte_memzone *mz;
 
-       rte_snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
+       snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
                        dev->driver->pci_drv.name, ring_name,
                                dev->data->port_id, queue_id);
        mz = rte_memzone_lookup(z_name);
@@ -1213,8 +1223,10 @@ eth_igb_tx_queue_setup(struct rte_eth_dev *dev,
                        "the TX WTHRESH value to 4, 8, or 16.\n");
 
        /* Free memory prior to re-allocation if needed */
-       if (dev->data->tx_queues[queue_idx] != NULL)
+       if (dev->data->tx_queues[queue_idx] != NULL) {
                igb_tx_queue_release(dev->data->tx_queues[queue_idx]);
+               dev->data->tx_queues[queue_idx] = NULL;
+       }
 
        /* First allocate the tx queue data structure */
        txq = rte_zmalloc("ethdev TX queue", sizeof(struct igb_tx_queue),
@@ -1239,6 +1251,8 @@ eth_igb_tx_queue_setup(struct rte_eth_dev *dev,
        txq->pthresh = tx_conf->tx_thresh.pthresh;
        txq->hthresh = tx_conf->tx_thresh.hthresh;
        txq->wthresh = tx_conf->tx_thresh.wthresh;
+       if (txq->wthresh > 0 && hw->mac.type == e1000_82576)
+               txq->wthresh = 1;
        txq->queue_id = queue_idx;
        txq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ?
                queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx);
@@ -1358,6 +1372,8 @@ eth_igb_rx_queue_setup(struct rte_eth_dev *dev,
        rxq->pthresh = rx_conf->rx_thresh.pthresh;
        rxq->hthresh = rx_conf->rx_thresh.hthresh;
        rxq->wthresh = rx_conf->rx_thresh.wthresh;
+       if (rxq->wthresh > 0 && hw->mac.type == e1000_82576)
+               rxq->wthresh = 1;
        rxq->drop_en = rx_conf->rx_drop_en;
        rxq->rx_free_thresh = rx_conf->rx_free_thresh;
        rxq->queue_id = queue_idx;
@@ -1383,8 +1399,8 @@ eth_igb_rx_queue_setup(struct rte_eth_dev *dev,
 #ifndef RTE_LIBRTE_XEN_DOM0
        rxq->rx_ring_phys_addr = (uint64_t) rz->phys_addr;
 #else
-       rxq->rx_ring_phys_addr = rte_mem_phy2mch(rz->memseg_id, rz->phys_addr); 
-#endif 
+       rxq->rx_ring_phys_addr = rte_mem_phy2mch(rz->memseg_id, rz->phys_addr);
+#endif
        rxq->rx_ring = (union e1000_adv_rx_desc *) rz->addr;
 
        /* Allocate software ring. */
@@ -1404,7 +1420,7 @@ eth_igb_rx_queue_setup(struct rte_eth_dev *dev,
        return 0;
 }
 
-uint32_t 
+uint32_t
 eth_igb_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 {
 #define IGB_RXQ_SCAN_INTERVAL 4
@@ -1516,53 +1532,28 @@ igb_rss_disable(struct rte_eth_dev *dev)
 }
 
 static void
-igb_rss_configure(struct rte_eth_dev *dev)
+igb_hw_rss_hash_set(struct e1000_hw *hw, struct rte_eth_rss_conf *rss_conf)
 {
-       struct e1000_hw *hw;
-       uint8_t *hash_key;
+       uint8_t  *hash_key;
        uint32_t rss_key;
        uint32_t mrqc;
-       uint32_t shift;
-       uint16_t rss_hf;
+       uint64_t rss_hf;
        uint16_t i;
 
-       hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-
-       rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
-       if (rss_hf == 0) /* Disable RSS. */ {
-               igb_rss_disable(dev);
-               return;
-       }
-       hash_key = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
-       if (hash_key == NULL)
-               hash_key = rss_intel_key; /* Default hash key. */
-
-       /* Fill in RSS hash key. */
-       for (i = 0; i < 10; i++) {
-               rss_key  = hash_key[(i * 4)];
-               rss_key |= hash_key[(i * 4) + 1] << 8;
-               rss_key |= hash_key[(i * 4) + 2] << 16;
-               rss_key |= hash_key[(i * 4) + 3] << 24;
-               E1000_WRITE_REG_ARRAY(hw, E1000_RSSRK(0), i, rss_key);
-       }
-
-       /* Fill in redirection table. */
-       shift = (hw->mac.type == e1000_82575) ? 6 : 0;
-       for (i = 0; i < 128; i++) {
-               union e1000_reta {
-                       uint32_t dword;
-                       uint8_t  bytes[4];
-               } reta;
-               uint8_t q_idx;
-
-               q_idx = (uint8_t) ((dev->data->nb_rx_queues > 1) ?
-                                  i % dev->data->nb_rx_queues : 0);
-               reta.bytes[i & 3] = (uint8_t) (q_idx << shift);
-               if ((i & 3) == 3)
-                       E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword);
+       hash_key = rss_conf->rss_key;
+       if (hash_key != NULL) {
+               /* Fill in RSS hash key */
+               for (i = 0; i < 10; i++) {
+                       rss_key  = hash_key[(i * 4)];
+                       rss_key |= hash_key[(i * 4) + 1] << 8;
+                       rss_key |= hash_key[(i * 4) + 2] << 16;
+                       rss_key |= hash_key[(i * 4) + 3] << 24;
+                       E1000_WRITE_REG_ARRAY(hw, E1000_RSSRK(0), i, rss_key);
+               }
        }
 
-       /* Set configured hashing functions in MRQC register. */
+       /* Set configured hashing protocols in MRQC register */
+       rss_hf = rss_conf->rss_hf;
        mrqc = E1000_MRQC_ENABLE_RSS_4Q; /* RSS enabled. */
        if (rss_hf & ETH_RSS_IPV4)
                mrqc |= E1000_MRQC_RSS_FIELD_IPV4;
@@ -1585,6 +1576,128 @@ igb_rss_configure(struct rte_eth_dev *dev)
        E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
 }
 
+int
+eth_igb_rss_hash_update(struct rte_eth_dev *dev,
+                       struct rte_eth_rss_conf *rss_conf)
+{
+       struct e1000_hw *hw;
+       uint32_t mrqc;
+       uint64_t rss_hf;
+
+       hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+       /*
+        * Before changing anything, first check that the update RSS operation
+        * does not attempt to disable RSS, if RSS was enabled at
+        * initialization time, or does not attempt to enable RSS, if RSS was
+        * disabled at initialization time.
+        */
+       rss_hf = rss_conf->rss_hf & IGB_RSS_OFFLOAD_ALL;
+       mrqc = E1000_READ_REG(hw, E1000_MRQC);
+       if (!(mrqc & E1000_MRQC_ENABLE_MASK)) { /* RSS disabled */
+               if (rss_hf != 0) /* Enable RSS */
+                       return -(EINVAL);
+               return 0; /* Nothing to do */
+       }
+       /* RSS enabled */
+       if (rss_hf == 0) /* Disable RSS */
+               return -(EINVAL);
+       igb_hw_rss_hash_set(hw, rss_conf);
+       return 0;
+}
+
+int eth_igb_rss_hash_conf_get(struct rte_eth_dev *dev,
+                             struct rte_eth_rss_conf *rss_conf)
+{
+       struct e1000_hw *hw;
+       uint8_t *hash_key;
+       uint32_t rss_key;
+       uint32_t mrqc;
+       uint64_t rss_hf;
+       uint16_t i;
+
+       hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+       hash_key = rss_conf->rss_key;
+       if (hash_key != NULL) {
+               /* Return RSS hash key */
+               for (i = 0; i < 10; i++) {
+                       rss_key = E1000_READ_REG_ARRAY(hw, E1000_RSSRK(0), i);
+                       hash_key[(i * 4)] = rss_key & 0x000000FF;
+                       hash_key[(i * 4) + 1] = (rss_key >> 8) & 0x000000FF;
+                       hash_key[(i * 4) + 2] = (rss_key >> 16) & 0x000000FF;
+                       hash_key[(i * 4) + 3] = (rss_key >> 24) & 0x000000FF;
+               }
+       }
+
+       /* Get RSS functions configured in MRQC register */
+       mrqc = E1000_READ_REG(hw, E1000_MRQC);
+       if ((mrqc & E1000_MRQC_ENABLE_RSS_4Q) == 0) { /* RSS is disabled */
+               rss_conf->rss_hf = 0;
+               return 0;
+       }
+       rss_hf = 0;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV4)
+               rss_hf |= ETH_RSS_IPV4;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_TCP)
+               rss_hf |= ETH_RSS_IPV4_TCP;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV6)
+               rss_hf |= ETH_RSS_IPV6;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_EX)
+               rss_hf |= ETH_RSS_IPV6_EX;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP)
+               rss_hf |= ETH_RSS_IPV6_TCP;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP_EX)
+               rss_hf |= ETH_RSS_IPV6_TCP_EX;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_UDP)
+               rss_hf |= ETH_RSS_IPV4_UDP;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_UDP)
+               rss_hf |= ETH_RSS_IPV6_UDP;
+       if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_UDP_EX)
+               rss_hf |= ETH_RSS_IPV6_UDP_EX;
+       rss_conf->rss_hf = rss_hf;
+       return 0;
+}
+
+static void
+igb_rss_configure(struct rte_eth_dev *dev)
+{
+       struct rte_eth_rss_conf rss_conf;
+       struct e1000_hw *hw;
+       uint32_t shift;
+       uint16_t i;
+
+       hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+       /* Fill in redirection table. */
+       shift = (hw->mac.type == e1000_82575) ? 6 : 0;
+       for (i = 0; i < 128; i++) {
+               union e1000_reta {
+                       uint32_t dword;
+                       uint8_t  bytes[4];
+               } reta;
+               uint8_t q_idx;
+
+               q_idx = (uint8_t) ((dev->data->nb_rx_queues > 1) ?
+                                  i % dev->data->nb_rx_queues : 0);
+               reta.bytes[i & 3] = (uint8_t) (q_idx << shift);
+               if ((i & 3) == 3)
+                       E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword);
+       }
+
+       /*
+        * Configure the RSS key and the RSS protocols used to compute
+        * the RSS hash of input packets.
+        */
+       rss_conf = dev->data->dev_conf.rx_adv_conf.rss_conf;
+       if ((rss_conf.rss_hf & IGB_RSS_OFFLOAD_ALL) == 0) {
+               igb_rss_disable(dev);
+               return;
+       }
+       if (rss_conf.rss_key == NULL)
+               rss_conf.rss_key = rss_intel_key; /* Default hash key */
+       igb_hw_rss_hash_set(hw, &rss_conf);
+}
+
 /*
  * Check if the mac type support VMDq or not.
  * Return 1 if it supports, otherwise, return 0.
@@ -1593,27 +1706,27 @@ static int
 igb_is_vmdq_supported(const struct rte_eth_dev *dev)
 {
        const struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-       
-       switch (hw->mac.type) { 
-       case e1000_82576: 
-       case e1000_82580: 
-       case e1000_i350: 
+
+       switch (hw->mac.type) {
+       case e1000_82576:
+       case e1000_82580:
+       case e1000_i350:
                return 1;
-       case e1000_82540: 
-       case e1000_82541: 
-       case e1000_82542: 
-       case e1000_82543: 
-       case e1000_82544: 
-       case e1000_82545: 
-       case e1000_82546: 
-       case e1000_82547: 
-       case e1000_82571: 
-       case e1000_82572: 
-       case e1000_82573: 
-       case e1000_82574: 
-       case e1000_82583: 
-       case e1000_i210: 
-       case e1000_i211: 
+       case e1000_82540:
+       case e1000_82541:
+       case e1000_82542:
+       case e1000_82543:
+       case e1000_82544:
+       case e1000_82545:
+       case e1000_82546:
+       case e1000_82547:
+       case e1000_82571:
+       case e1000_82572:
+       case e1000_82573:
+       case e1000_82574:
+       case e1000_82583:
+       case e1000_i210:
+       case e1000_i211:
        default:
                PMD_INIT_LOG(ERR, "Cannot support VMDq feature\n");
                return 0;
@@ -1627,8 +1740,8 @@ igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
        struct e1000_hw *hw;
        uint32_t mrqc, vt_ctl, vmolr, rctl;
        int i;
-       PMD_INIT_LOG(DEBUG, ">>");
+
+       PMD_INIT_LOG(DEBUG, ">>");
        hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        cfg = &dev->data->dev_conf.rx_adv_conf.vmdq_rx_conf;
 
@@ -1637,7 +1750,7 @@ igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
                return -1;
 
        igb_rss_disable(dev);
-       
+
        /* RCTL: eanble VLAN filter */
        rctl = E1000_READ_REG(hw, E1000_RCTL);
        rctl |= E1000_RCTL_VFE;
@@ -1645,20 +1758,20 @@ igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
 
        /* MRQC: enable vmdq */
        mrqc = E1000_READ_REG(hw, E1000_MRQC);
-       mrqc |= E1000_MRQC_ENABLE_VMDQ; 
+       mrqc |= E1000_MRQC_ENABLE_VMDQ;
        E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
+
        /* VTCTL:  pool selection according to VLAN tag */
        vt_ctl = E1000_READ_REG(hw, E1000_VT_CTL);
-       if (cfg->enable_default_pool) 
+       if (cfg->enable_default_pool)
                vt_ctl |= (cfg->default_pool << E1000_VT_CTL_DEFAULT_POOL_SHIFT);
        vt_ctl |= E1000_VT_CTL_IGNORE_MAC;
        E1000_WRITE_REG(hw, E1000_VT_CTL, vt_ctl);
-       
-       /* 
+
+       /*
         * VMOLR: set STRVLAN as 1 if IGMAC in VTCTL is set as 1
-        * Both 82576 and 82580 support it 
-        */
+        * Both 82576 and 82580 support it
+        */
        if (hw->mac.type != e1000_i350) {
                for (i = 0; i < E1000_VMOLR_SIZE; i++) {
                        vmolr = E1000_READ_REG(hw, E1000_VMOLR(i));
@@ -1668,13 +1781,13 @@ igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
        }
 
        /* VFTA - enable all vlan filters */
-       for (i = 0; i < IGB_VFTA_SIZE; i++) 
+       for (i = 0; i < IGB_VFTA_SIZE; i++)
                E1000_WRITE_REG(hw, (E1000_VFTA+(i*4)), UINT32_MAX);
-       
+
        /* VFRE: 8 pools enabling for rx, both 82576 and i350 support it */
        if (hw->mac.type != e1000_82580)
                E1000_WRITE_REG(hw, E1000_VFRE, E1000_MBVFICR_VFREQ_MASK);
+
        /*
         * RAH/RAL - allow pools to read specific mac addresses
         * In this case, all pools should be able to read from mac addr 0
@@ -1692,7 +1805,7 @@ igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
        }
 
        E1000_WRITE_FLUSH(hw);
-       
+
        return 0;
 }
 
@@ -1718,7 +1831,6 @@ igb_alloc_rx_queue_mbufs(struct igb_rx_queue *rxq)
                if (mbuf == NULL) {
                        PMD_INIT_LOG(ERR, "RX mbuf alloc failed "
                                "queue_id=%hu\n", rxq->queue_id);
-                       igb_rx_queue_release(rxq);
                        return (-ENOMEM);
                }
                dma_addr =
@@ -1739,42 +1851,39 @@ igb_dev_mq_rx_configure(struct rte_eth_dev *dev)
        struct e1000_hw *hw =
                E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        uint32_t mrqc;
+
        if (RTE_ETH_DEV_SRIOV(dev).active == ETH_8_POOLS) {
                /*
-               * SRIOV active scheme
-               * FIXME if support RSS together with VMDq & SRIOV
-               */
+                * SRIOV active scheme
+                * FIXME if support RSS together with VMDq & SRIOV
+                */
                mrqc = E1000_MRQC_ENABLE_VMDQ;
                /* 011b Def_Q ignore, according to VT_CTL.DEF_PL */
                mrqc |= 0x3 << E1000_MRQC_DEF_Q_SHIFT;
                E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
-       } else if(RTE_ETH_DEV_SRIOV(dev).active == 0) { 
+       } else if(RTE_ETH_DEV_SRIOV(dev).active == 0) {
                /*
-               * SRIOV inactive scheme
-               */
-               if (dev->data->nb_rx_queues > 1)
-                       switch (dev->data->dev_conf.rxmode.mq_mode) {
-                       case ETH_MQ_RX_NONE:
-                               /* if mq_mode not assign, we use rss mode.*/
+                * SRIOV inactive scheme
+                */
+               switch (dev->data->dev_conf.rxmode.mq_mode) {
                        case ETH_MQ_RX_RSS:
                                igb_rss_configure(dev);
                                break;
                        case ETH_MQ_RX_VMDQ_ONLY:
                                /*Configure general VMDQ only RX parameters*/
-                               igb_vmdq_rx_hw_configure(dev); 
+                               igb_vmdq_rx_hw_configure(dev);
                                break;
-                       default: 
+                       case ETH_MQ_RX_NONE:
+                               /* if mq_mode is none, disable rss mode.*/
+                       default:
                                igb_rss_disable(dev);
                                break;
-                       }
-               else
-                       igb_rss_disable(dev);
+               }
        }
+
        return 0;
 }
+
 int
 eth_igb_rx_init(struct rte_eth_dev *dev)
 {
@@ -1899,6 +2008,11 @@ eth_igb_rx_init(struct rte_eth_dev *dev)
                E1000_WRITE_REG(hw, E1000_RXDCTL(rxq->reg_idx), rxdctl);
        }
 
+       if (dev->data->dev_conf.rxmode.enable_scatter) {
+               dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
+               dev->data->scattered_rx = 1;
+       }
+
        /*
         * Setup BSIZE field of RCTL register, if needed.
         * Buffer sizes >= 1024 are not [supposed to be] setup in the RCTL
@@ -2077,6 +2191,11 @@ eth_igbvf_rx_init(struct rte_eth_dev *dev)
 
        hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 
+       /* setup MTU */
+       e1000_rlpml_set_vf(hw,
+               (uint16_t)(dev->data->dev_conf.rxmode.max_rx_pkt_len +
+               VLAN_TAG_SIZE));
+
        /* Configure and enable each RX queue. */
        rctl_bsize = 0;
        dev->rx_pkt_burst = eth_igb_recv_pkts;
@@ -2149,10 +2268,10 @@ eth_igbvf_rx_init(struct rte_eth_dev *dev)
                rxdctl &= 0xFFF00000;
                rxdctl |= (rxq->pthresh & 0x1F);
                rxdctl |= ((rxq->hthresh & 0x1F) << 8);
-               if (hw->mac.type == e1000_82576) {
-                       /* 
+               if (hw->mac.type == e1000_vfadapt) {
+                       /*
                         * Workaround of 82576 VF Erratum
-                        * force set WTHRESH to 1 
+                        * force set WTHRESH to 1
                         * to avoid Write-Back not triggered sometimes
                         */
                        rxdctl |= 0x10000;
@@ -2163,6 +2282,11 @@ eth_igbvf_rx_init(struct rte_eth_dev *dev)
                E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl);
        }
 
+       if (dev->data->dev_conf.rxmode.enable_scatter) {
+               dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
+               dev->data->scattered_rx = 1;
+       }
+
        /*
         * Setup the HW Rx Head and Tail Descriptor Pointers.
         * This needs to be done after enable.
@@ -2213,12 +2337,12 @@ eth_igbvf_tx_init(struct rte_eth_dev *dev)
                txdctl |= txq->pthresh & 0x1F;
                txdctl |= ((txq->hthresh & 0x1F) << 8);
                if (hw->mac.type == e1000_82576) {
-                       /* 
+                       /*
                         * Workaround of 82576 VF Erratum
-                        * force set WTHRESH to 1 
+                        * force set WTHRESH to 1
                         * to avoid Write-Back not triggered sometimes
                         */
-                       txdctl |= 0x10000; 
+                       txdctl |= 0x10000;
                        PMD_INIT_LOG(DEBUG, "Force set TX WTHRESH to 1 !\n");
                }
                else