i40e: code style fixes
[dpdk.git] / lib / librte_pmd_virtio / virtio_ethdev.c
index aa01125..19930c0 100644 (file)
@@ -110,13 +110,14 @@ virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
        ctrl->status = status;
 
        if (!vq->hw->cvq) {
-               PMD_INIT_LOG(ERR, "%s(): Control queue is "
-                       "not supported by this device.\n", __func__);
+               PMD_INIT_LOG(ERR,
+                            "%s(): Control queue is not supported.",
+                            __func__);
                return -1;
        }
 
        PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
-               "vq->hw->cvq = %p vq = %p\n",
+               "vq->hw->cvq = %p vq = %p",
                vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 
        if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
@@ -159,7 +160,7 @@ virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
        vq_update_avail_ring(vq, head);
        vq_update_avail_idx(vq);
 
-       PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d\n", vq->vq_queue_index);
+       PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 
        virtqueue_notify(vq);
 
@@ -190,7 +191,7 @@ virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
                vq->vq_free_cnt++;
        }
 
-       PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d\n",
+       PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
                        vq->vq_free_cnt, vq->vq_desc_head_idx);
 
        memcpy(&result, vq->virtio_net_hdr_mz->addr,
@@ -212,15 +213,13 @@ virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
        ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
        memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 
-       PMD_INIT_LOG(DEBUG, "ctrl.data=%d\n", *(int *)ctrl.data);
-
        dlen[0] = sizeof(uint16_t);
 
        ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 
        if (ret) {
                PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
-                         "failed, this is too late now...\n");
+                         "failed, this is too late now...");
                return -EINVAL;
        }
 
@@ -245,50 +244,47 @@ int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 
        /* Write the virtqueue index to the Queue Select Field */
        VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
-       PMD_INIT_LOG(DEBUG, "selecting queue: %d\n", vtpci_queue_idx);
+       PMD_INIT_LOG(DEBUG, "selecting queue: %d", vtpci_queue_idx);
 
        /*
         * Read the virtqueue size from the Queue Size field
         * Always power of 2 and if 0 virtqueue does not exist
         */
        vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
-       PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d\n", vq_size, nb_desc);
+       PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d", vq_size, nb_desc);
        if (nb_desc == 0)
                nb_desc = vq_size;
        if (vq_size == 0) {
-               PMD_INIT_LOG(ERR, "%s: virtqueue does not exist\n", __func__);
-               return (-EINVAL);
+               PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
+               return -EINVAL;
        } else if (!rte_is_power_of_2(vq_size)) {
-               PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2\n", __func__);
-               return (-EINVAL);
+               PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
+               return -EINVAL;
        } else if (nb_desc != vq_size) {
-               PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size\n",
+               PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size",
                        nb_desc, vq_size);
                nb_desc = vq_size;
        }
 
        if (queue_type == VTNET_RQ) {
-               rte_snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
+               snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
                        dev->data->port_id, queue_idx);
                vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
                        vq_size * sizeof(struct vq_desc_extra), CACHE_LINE_SIZE);
-               memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
-       } else if(queue_type == VTNET_TQ) {
-               rte_snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
+       } else if (queue_type == VTNET_TQ) {
+               snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
                        dev->data->port_id, queue_idx);
                vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
                        vq_size * sizeof(struct vq_desc_extra), CACHE_LINE_SIZE);
-               memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
-       } else if(queue_type == VTNET_CQ) {
-               rte_snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
+       } else if (queue_type == VTNET_CQ) {
+               snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
                        dev->data->port_id);
                vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
                        vq_size * sizeof(struct vq_desc_extra),
                        CACHE_LINE_SIZE);
-               memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
        }
        if (vq == NULL) {
-               PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue\n", __func__);
+               PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__);
                return (-ENOMEM);
        }
 
@@ -305,13 +301,13 @@ int virtio_dev_queue_setup(struct rte_eth_dev *dev,
         */
        size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
        vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
-       PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d\n", size, vq->vq_ring_size);
+       PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
 
        mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
                socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
        if (mz == NULL) {
                rte_free(vq);
-               return (-ENOMEM);
+               return -ENOMEM;
        }
 
        /*
@@ -319,41 +315,41 @@ int virtio_dev_queue_setup(struct rte_eth_dev *dev,
         * and only accepts 32 bit page frame number.
         * Check if the allocated physical memory exceeds 16TB.
         */
-       if ( (mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32) ) {
-               PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!\n");
+       if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
+               PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
                rte_free(vq);
-               return (-ENOMEM);
+               return -ENOMEM;
        }
 
        memset(mz->addr, 0, sizeof(mz->len));
        vq->mz = mz;
        vq->vq_ring_mem = mz->phys_addr;
        vq->vq_ring_virt_mem = mz->addr;
-       PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64"\n", (uint64_t)mz->phys_addr);
-       PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64"\n", (uint64_t)mz->addr);
+       PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64, (uint64_t)mz->phys_addr);
+       PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)mz->addr);
        vq->virtio_net_hdr_mz  = NULL;
-       vq->virtio_net_hdr_mem = (void *)NULL;
+       vq->virtio_net_hdr_mem = 0;
 
        if (queue_type == VTNET_TQ) {
                /*
                 * For each xmit packet, allocate a virtio_net_hdr
                 */
-               rte_snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
+               snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
                        dev->data->port_id, queue_idx);
                vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
-                       vq_size * sizeof(struct virtio_net_hdr),
+                       vq_size * hw->vtnet_hdr_size,
                        socket_id, 0, CACHE_LINE_SIZE);
                if (vq->virtio_net_hdr_mz == NULL) {
                        rte_free(vq);
                        return -ENOMEM;
                }
                vq->virtio_net_hdr_mem =
-                       (void *)(uintptr_t)vq->virtio_net_hdr_mz->phys_addr;
+                       vq->virtio_net_hdr_mz->phys_addr;
                memset(vq->virtio_net_hdr_mz->addr, 0,
-                       vq_size * sizeof(struct virtio_net_hdr));
+                       vq_size * hw->vtnet_hdr_size);
        } else if (queue_type == VTNET_CQ) {
                /* Allocate a page for control vq command, data and status */
-               rte_snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
+               snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
                        dev->data->port_id);
                vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
                        PAGE_SIZE, socket_id, 0, CACHE_LINE_SIZE);
@@ -362,7 +358,7 @@ int virtio_dev_queue_setup(struct rte_eth_dev *dev,
                        return -ENOMEM;
                }
                vq->virtio_net_hdr_mem =
-                       (void *)(uintptr_t)vq->virtio_net_hdr_mz->phys_addr;
+                       vq->virtio_net_hdr_mz->phys_addr;
                memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
        }
 
@@ -391,7 +387,7 @@ virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
                        vtpci_queue_idx, nb_desc, socket_id, &vq);
 
        if (ret < 0) {
-               PMD_INIT_LOG(ERR, "control vq initialization failed\n");
+               PMD_INIT_LOG(ERR, "control vq initialization failed");
                return ret;
        }
 
@@ -429,7 +425,7 @@ static struct eth_dev_ops virtio_eth_dev_ops = {
        /* meaningfull only to multiple queue */
        .tx_queue_release        = virtio_dev_tx_queue_release,
        /* collect stats per queue */
-       .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set
+       .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 };
 
 static inline int
@@ -441,9 +437,9 @@ virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 
        if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
                        *(uint64_t *)src) == 0)
-               return (-1);
+               return -1;
 
-       return (0);
+       return 0;
 }
 
 /**
@@ -467,27 +463,75 @@ virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 
        if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
                                        *(uint64_t *)src) == 0)
-               return (-1);
+               return -1;
 
-       return (0);
+       return 0;
 }
 
 static void
 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 {
-       struct virtio_hw *hw =
-               VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-       if(stats)
-               memcpy(stats, &hw->eth_stats, sizeof(*stats));
+       unsigned i;
+
+       for (i = 0; i < dev->data->nb_tx_queues; i++) {
+               const struct virtqueue *txvq = dev->data->tx_queues[i];
+               if (txvq == NULL)
+                       continue;
+
+               stats->opackets += txvq->packets;
+               stats->obytes += txvq->bytes;
+               stats->oerrors += txvq->errors;
+
+               if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+                       stats->q_opackets[i] = txvq->packets;
+                       stats->q_obytes[i] = txvq->bytes;
+               }
+       }
+
+       for (i = 0; i < dev->data->nb_rx_queues; i++) {
+               const struct virtqueue *rxvq = dev->data->rx_queues[i];
+               if (rxvq == NULL)
+                       continue;
+
+               stats->ipackets += rxvq->packets;
+               stats->ibytes += rxvq->bytes;
+               stats->ierrors += rxvq->errors;
+
+               if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+                       stats->q_ipackets[i] = rxvq->packets;
+                       stats->q_ibytes[i] = rxvq->bytes;
+               }
+       }
+
+       stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 }
 
 static void
 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 {
-       struct virtio_hw *hw =
-               VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-       /* Reset software totals */
-       memset(&hw->eth_stats, 0, sizeof(hw->eth_stats));
+       unsigned int i;
+
+       for (i = 0; i < dev->data->nb_tx_queues; i++) {
+               struct virtqueue *txvq = dev->data->tx_queues[i];
+               if (txvq == NULL)
+                       continue;
+
+               txvq->packets = 0;
+               txvq->bytes = 0;
+               txvq->errors = 0;
+       }
+
+       for (i = 0; i < dev->data->nb_rx_queues; i++) {
+               struct virtqueue *rxvq = dev->data->rx_queues[i];
+               if (rxvq == NULL)
+                       continue;
+
+               rxvq->packets = 0;
+               rxvq->bytes = 0;
+               rxvq->errors = 0;
+       }
+
+       dev->data->rx_mbuf_alloc_failed = 0;
 }
 
 static void
@@ -515,9 +559,10 @@ virtio_get_hwaddr(struct virtio_hw *hw)
 static void
 virtio_negotiate_features(struct virtio_hw *hw)
 {
-       uint32_t guest_features, mask;
+       uint32_t host_features, mask;
+
        mask = VIRTIO_NET_F_CTRL_RX | VIRTIO_NET_F_CTRL_VLAN;
-       mask |= VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM ;
+       mask |= VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM;
 
        /* TSO and LRO are only available when their corresponding
         * checksum offload feature is also negotiated.
@@ -526,28 +571,25 @@ virtio_negotiate_features(struct virtio_hw *hw)
        mask |= VIRTIO_NET_F_GUEST_TSO4 | VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN;
        mask |= VTNET_LRO_FEATURES;
 
-       /* rx_mbuf should not be in multiple merged segments */
-       mask |= VIRTIO_NET_F_MRG_RXBUF;
-
        /* not negotiating INDIRECT descriptor table support */
        mask |= VIRTIO_RING_F_INDIRECT_DESC;
 
        /* Prepare guest_features: feature that driver wants to support */
-       guest_features = VTNET_FEATURES & ~mask;
-       PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x\n",
-               guest_features);
+       hw->guest_features = VTNET_FEATURES & ~mask;
+       PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
+               hw->guest_features);
 
        /* Read device(host) feature bits */
-       hw->host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
-       PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x\n",
-               hw->host_features);
+       host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
+       PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
+               host_features);
 
        /*
         * Negotiate features: Subset of device feature bits are written back
         * guest feature bits.
         */
-       hw->guest_features = vtpci_negotiate_features(hw, guest_features);
-       PMD_INIT_LOG(DEBUG, "features after negotiate = %x\n",
+       hw->guest_features = vtpci_negotiate_features(hw, host_features);
+       PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
                hw->guest_features);
 }
 
@@ -559,21 +601,22 @@ parse_sysfs_value(const char *filename, unsigned long *val)
        char buf[BUFSIZ];
        char *end = NULL;
 
-       if ((f = fopen(filename, "r")) == NULL) {
-               PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s\n",
+       f = fopen(filename, "r");
+       if (f == NULL) {
+               PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
                             __func__, filename);
                return -1;
        }
 
        if (fgets(buf, sizeof(buf), f) == NULL) {
-               PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s\n",
+               PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
                             __func__, filename);
                fclose(f);
                return -1;
        }
        *val = strtoul(buf, &end, 0);
        if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
-               PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s\n",
+               PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
                             __func__, filename);
                fclose(f);
                return -1;
@@ -591,19 +634,19 @@ static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen)
 
        /* depending on kernel version, uio can be located in uio/uioX
         * or uio:uioX */
-       rte_snprintf(dirname, sizeof(dirname),
-                SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
-                loc->domain, loc->bus, loc->devid, loc->function);
+       snprintf(dirname, sizeof(dirname),
+                    SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
+                    loc->domain, loc->bus, loc->devid, loc->function);
        dir = opendir(dirname);
        if (dir == NULL) {
                /* retry with the parent directory */
-               rte_snprintf(dirname, sizeof(dirname),
-                        SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
-                        loc->domain, loc->bus, loc->devid, loc->function);
+               snprintf(dirname, sizeof(dirname),
+                            SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
+                            loc->domain, loc->bus, loc->devid, loc->function);
                dir = opendir(dirname);
 
                if (dir == NULL) {
-                       PMD_INIT_LOG(ERR, "Cannot opendir %s\n", dirname);
+                       PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
                        return -1;
                }
        }
@@ -623,7 +666,7 @@ static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen)
                errno = 0;
                uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
                if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
-                       rte_snprintf(buf, buflen, "%s/uio%u", dirname, uio_num);
+                       snprintf(buf, buflen, "%s/uio%u", dirname, uio_num);
                        break;
                }
 
@@ -631,7 +674,7 @@ static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen)
                errno = 0;
                uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
                if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
-                       rte_snprintf(buf, buflen, "%s/uio:uio%u", dirname,
+                       snprintf(buf, buflen, "%s/uio:uio%u", dirname,
                                     uio_num);
                        break;
                }
@@ -640,12 +683,36 @@ static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen)
 
        /* No uio resource found */
        if (e == NULL) {
-               PMD_INIT_LOG(ERR, "Could not find uio resource\n");
+               PMD_INIT_LOG(ERR, "Could not find uio resource");
                return -1;
        }
 
        return 0;
 }
+
+static int
+virtio_has_msix(const struct rte_pci_addr *loc)
+{
+       DIR *d;
+       char dirname[PATH_MAX];
+
+       snprintf(dirname, sizeof(dirname),
+                    SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
+                    loc->domain, loc->bus, loc->devid, loc->function);
+
+       d = opendir(dirname);
+       if (d)
+               closedir(d);
+
+       return (d != NULL);
+}
+#else
+static int
+virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
+{
+       /* nic_uio does not enable interrupts, return 0 (false). */
+       return 0;
+}
 #endif
 
 /*
@@ -663,61 +730,54 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
        struct virtio_hw *hw =
                VIRTIO_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
 
-       if (RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr) ) {
+       if (RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr)) {
                PMD_INIT_LOG(ERR,
                        "MBUF HEADROOM should be enough to hold virtio net hdr\n");
-               return (-1);
-       }
-
-       if (! (rte_eal_get_configuration()->flags & EAL_FLG_HIGH_IOPL)) {
-               PMD_INIT_LOG(ERR,
-                       "IOPL call failed in EAL init - cannot use virtio PMD driver\n");
-               return (-1);
+               return -1;
        }
 
        eth_dev->dev_ops = &virtio_eth_dev_ops;
-       eth_dev->rx_pkt_burst = &virtio_recv_pkts;
        eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
 
-       if(rte_eal_process_type() == RTE_PROC_SECONDARY)
+       if (rte_eal_process_type() == RTE_PROC_SECONDARY)
                return 0;
 
        pci_dev = eth_dev->pci_dev;
 
-       hw->device_id = pci_dev->id.device_id;
-       hw->vendor_id = pci_dev->id.vendor_id;
 #ifdef RTE_EXEC_ENV_LINUXAPP
        {
                char dirname[PATH_MAX];
                char filename[PATH_MAX];
-               unsigned long start,size;
+               unsigned long start, size;
 
                if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname)) < 0)
                        return -1;
 
                /* get portio size */
-               rte_snprintf(filename, sizeof(filename),
+               snprintf(filename, sizeof(filename),
                             "%s/portio/port0/size", dirname);
                if (parse_sysfs_value(filename, &size) < 0) {
-                       PMD_INIT_LOG(ERR, "%s(): cannot parse size\n",
+                       PMD_INIT_LOG(ERR, "%s(): cannot parse size",
                                     __func__);
                        return -1;
                }
 
                /* get portio start */
-               rte_snprintf(filename, sizeof(filename),
+               snprintf(filename, sizeof(filename),
                             "%s/portio/port0/start", dirname);
                if (parse_sysfs_value(filename, &start) < 0) {
-                       PMD_INIT_LOG(ERR, "%s(): cannot parse portio start\n",
+                       PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
                                     __func__);
                        return -1;
                }
                pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
                pci_dev->mem_resource[0].len =  (uint64_t)size;
-               PMD_INIT_LOG(DEBUG, "PCI Port IO found start=0x%lx with "
-                            "size=0x%lx\n", start, size);
+               PMD_INIT_LOG(DEBUG,
+                            "PCI Port IO found start=0x%lx with size=0x%lx",
+                            start, size);
        }
 #endif
+       hw->use_msix = virtio_has_msix(&pci_dev->addr);
        hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
 
        /* Reset the device although not necessary at startup */
@@ -731,10 +791,13 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
        virtio_negotiate_features(hw);
 
        /* Setting up rx_header size for the device */
-       if(vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
+       if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
+               eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
                hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
-       else
+       } else {
+               eth_dev->rx_pkt_burst = &virtio_recv_pkts;
                hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
+       }
 
        /* Allocate memory for storing MAC addresses */
        eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
@@ -742,15 +805,17 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
                PMD_INIT_LOG(ERR,
                        "Failed to allocate %d bytes needed to store MAC addresses",
                        ETHER_ADDR_LEN);
-               return (-ENOMEM);
+               return -ENOMEM;
        }
 
        /* Copy the permanent MAC address to: virtio_hw */
        virtio_get_hwaddr(hw);
        ether_addr_copy((struct ether_addr *) hw->mac_addr,
                        &eth_dev->data->mac_addrs[0]);
-       PMD_INIT_LOG(DEBUG, "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", hw->mac_addr[0],
-                       hw->mac_addr[1],hw->mac_addr[2], hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
+       PMD_INIT_LOG(DEBUG,
+                    "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
+                    hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
+                    hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
 
        if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
                config = &local_config;
@@ -758,16 +823,16 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
                if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
                        offset_conf += sizeof(config->status);
                } else {
-                       PMD_INIT_LOG(DEBUG, "VIRTIO_NET_F_STATUS is "
-                               "not supported\n");
+                       PMD_INIT_LOG(DEBUG,
+                                    "VIRTIO_NET_F_STATUS is not supported");
                        config->status = 0;
                }
 
                if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
                        offset_conf += sizeof(config->max_virtqueue_pairs);
                } else {
-                       PMD_INIT_LOG(DEBUG, "VIRTIO_NET_F_MQ is "
-                               "not supported\n");
+                       PMD_INIT_LOG(DEBUG,
+                                    "VIRTIO_NET_F_MQ is not supported");
                        config->max_virtqueue_pairs = 1;
                }
 
@@ -784,11 +849,11 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
                                        config->max_virtqueue_pairs * 2,
                                        SOCKET_ID_ANY);
 
-               PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d\n",
+               PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
                                config->max_virtqueue_pairs);
-               PMD_INIT_LOG(DEBUG, "config->status=%d\n", config->status);
+               PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
                PMD_INIT_LOG(DEBUG,
-                               "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
+                               "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
                                config->mac[0], config->mac[1],
                                config->mac[2], config->mac[3],
                                config->mac[4], config->mac[5]);
@@ -800,7 +865,7 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
        eth_dev->data->nb_rx_queues = hw->max_rx_queues;
        eth_dev->data->nb_tx_queues = hw->max_tx_queues;
 
-       PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d\n",
+       PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
                        hw->max_rx_queues, hw->max_tx_queues);
        PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
                        eth_dev->data->port_id, pci_dev->id.vendor_id,
@@ -812,7 +877,7 @@ static struct eth_driver rte_virtio_pmd = {
        {
                .name = "rte_virtio_pmd",
                .id_table = pci_id_virtio_map,
-               .drv_flags = RTE_PCI_DRV_NEED_IGB_UIO,
+               .drv_flags = RTE_PCI_DRV_NEED_MAPPING,
        },
        .eth_dev_init = eth_virtio_dev_init,
        .dev_private_size = sizeof(struct virtio_adapter),
@@ -825,10 +890,16 @@ static struct eth_driver rte_virtio_pmd = {
  * Returns 0 on success.
  */
 static int
-rte_virtio_pmd_init(const char *name __rte_unused, const char *param __rte_unused)
+rte_virtio_pmd_init(const char *name __rte_unused,
+                   const char *param __rte_unused)
 {
+       if (rte_eal_iopl_init() != 0) {
+               PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
+               return -1;
+       }
+
        rte_eth_driver_register(&rte_virtio_pmd);
-       return (0);
+       return 0;
 }
 
 /*
@@ -849,9 +920,18 @@ virtio_dev_tx_queue_release(__rte_unused void *txq)
  * It returns 0 on success.
  */
 static int
-virtio_dev_configure(__rte_unused struct rte_eth_dev *dev)
+virtio_dev_configure(struct rte_eth_dev *dev)
 {
-       return (0);
+       const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
+
+       PMD_INIT_LOG(DEBUG, "configure");
+
+       if (rxmode->hw_ip_checksum) {
+               PMD_DRV_LOG(ERR, "HW IP checksum not supported");
+               return (-EINVAL);
+       }
+
+       return 0;
 }
 
 
@@ -869,23 +949,23 @@ virtio_dev_start(struct rte_eth_dev *dev)
        /* Tell the host we've known how to drive the device. */
        vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
 
-       hw->adapter_stopped = 0;
-
        virtio_dev_cq_start(dev);
 
        /* Do final configuration before rx/tx engine starts */
        virtio_dev_rxtx_start(dev);
 
        /* Check VIRTIO_NET_F_STATUS for link status*/
-       if(vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
+       if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
                vtpci_read_dev_config(hw,
                                offsetof(struct virtio_net_config, status),
                                &status, sizeof(status));
-               if((status & VIRTIO_NET_S_LINK_UP) == 0) {
-                       PMD_INIT_LOG(ERR,     "Port: %d Link is DOWN\n", dev->data->port_id);
-                       return (-EIO);
+               if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
+                       PMD_INIT_LOG(ERR, "Port: %d Link is DOWN",
+                                    dev->data->port_id);
+                       return -EIO;
                } else {
-                       PMD_INIT_LOG(DEBUG, "Port: %d Link is UP\n",  dev->data->port_id);
+                       PMD_INIT_LOG(DEBUG, "Port: %d Link is UP",
+                                    dev->data->port_id);
                }
        }
        vtpci_reinit_complete(hw);
@@ -900,12 +980,12 @@ virtio_dev_start(struct rte_eth_dev *dev)
                        return -EINVAL;
        }
 
-       PMD_INIT_LOG(DEBUG, "nb_queues=%d\n", nb_queues);
+       PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
 
        for (i = 0; i < nb_queues; i++)
                virtqueue_notify(dev->data->rx_queues[i]);
 
-       PMD_INIT_LOG(DEBUG, "Notified backend at initialization\n");
+       PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
 
        for (i = 0; i < dev->data->nb_rx_queues; i++)
                VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
@@ -920,38 +1000,41 @@ static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
 {
        struct rte_mbuf *buf;
        int i, mbuf_num = 0;
+
        for (i = 0; i < dev->data->nb_rx_queues; i++) {
-               PMD_INIT_LOG(DEBUG, "Before freeing rxq[%d] used and "
-                       "unused buf\n", i);
+               PMD_INIT_LOG(DEBUG,
+                            "Before freeing rxq[%d] used and unused buf", i);
                VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
 
                while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
                                        dev->data->rx_queues[i])) != NULL) {
-                       rte_pktmbuf_free_seg(buf);
+                       rte_pktmbuf_free(buf);
                        mbuf_num++;
                }
 
-               PMD_INIT_LOG(DEBUG, "free %d mbufs\n", mbuf_num);
-               PMD_INIT_LOG(DEBUG, "After freeing rxq[%d] used and "
-                       "unused buf\n", i);
+               PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
+               PMD_INIT_LOG(DEBUG,
+                            "After freeing rxq[%d] used and unused buf", i);
                VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
        }
 
        for (i = 0; i < dev->data->nb_tx_queues; i++) {
-               PMD_INIT_LOG(DEBUG, "Before freeing txq[%d] used and "
-                       "unused bufs\n", i);
+               PMD_INIT_LOG(DEBUG,
+                            "Before freeing txq[%d] used and unused bufs",
+                            i);
                VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
 
                mbuf_num = 0;
                while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
                                        dev->data->tx_queues[i])) != NULL) {
-                       rte_pktmbuf_free_seg(buf);
+                       rte_pktmbuf_free(buf);
+
                        mbuf_num++;
                }
 
-               PMD_INIT_LOG(DEBUG, "free %d mbufs\n", mbuf_num);
-               PMD_INIT_LOG(DEBUG, "After freeing txq[%d] used and "
-                       "unused buf\n", i);
+               PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
+               PMD_INIT_LOG(DEBUG,
+                            "After freeing txq[%d] used and unused buf", i);
                VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
        }
 }
@@ -980,34 +1063,37 @@ virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complet
        memset(&link, 0, sizeof(link));
        virtio_dev_atomic_read_link_status(dev, &link);
        old = link;
-       link.link_duplex = FULL_DUPLEX ;
-       link.link_speed  = SPEED_10G ;
-       if(vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
-               PMD_INIT_LOG(DEBUG, "Get link status from hw\n");
+       link.link_duplex = FULL_DUPLEX;
+       link.link_speed  = SPEED_10G;
+       if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
+               PMD_INIT_LOG(DEBUG, "Get link status from hw");
                vtpci_read_dev_config(hw,
                                offsetof(struct virtio_net_config, status),
                                &status, sizeof(status));
-               if((status & VIRTIO_NET_S_LINK_UP) == 0) {
+               if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
                        link.link_status = 0;
-                       PMD_INIT_LOG(DEBUG, "Port %d is down\n",dev->data->port_id);
+                       PMD_INIT_LOG(DEBUG, "Port %d is down",
+                                    dev->data->port_id);
                } else {
                        link.link_status = 1;
-                       PMD_INIT_LOG(DEBUG, "Port %d is up\n",dev->data->port_id);
+                       PMD_INIT_LOG(DEBUG, "Port %d is up",
+                                    dev->data->port_id);
                }
        } else {
-               link.link_status = 1;   //Link up
+               link.link_status = 1;   /* Link up */
        }
        virtio_dev_atomic_write_link_status(dev, &link);
-       if(old.link_status == link.link_status)
-               return (-1);
+       if (old.link_status == link.link_status)
+               return -1;
        /*changed*/
-       return (0);
+       return 0;
 }
 
 static void
 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 {
        struct virtio_hw *hw = VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
        dev_info->driver_name = dev->driver->pci_drv.name;
        dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
        dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;