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Date: Tue, 13 Jan 2015 13:58:47 -0500
From: Willem de Bruijn <willemb@...gle.com>
To: John Fastabend <john.fastabend@...il.com>
Cc: Network Development <netdev@...r.kernel.org>,
"Zhou, Danny" <danny.zhou@...el.com>,
Neil Horman <nhorman@...driver.com>,
Daniel Borkmann <dborkman@...hat.com>,
"Ronciak, John" <john.ronciak@...el.com>,
Hannes Frederic Sowa <hannes@...essinduktion.org>,
brouer@...hat.com
Subject: Re: [RFC PATCH v2 2/2] net: ixgbe: implement af_packet direct queue mappings
On Mon, Jan 12, 2015 at 11:35 PM, John Fastabend
<john.fastabend@...il.com> wrote:
> This allows driver queues to be split off and mapped into user
> space using af_packet.
>
> Signed-off-by: John Fastabend <john.r.fastabend@...el.com>
> ---
> drivers/net/ethernet/intel/ixgbe/ixgbe.h | 17 +
> drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c | 23 +
> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 407 ++++++++++++++++++++++
> drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 1
> 4 files changed, 440 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> index 38fc64c..aa4960e 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> @@ -204,6 +204,20 @@ struct ixgbe_tx_queue_stats {
> u64 tx_done_old;
> };
>
> +#define MAX_USER_DMA_REGIONS_PER_SOCKET 16
> +
> +struct ixgbe_user_dma_region {
> + dma_addr_t dma_region_iova;
> + unsigned long dma_region_size;
> + int direction;
> +};
> +
> +struct ixgbe_user_queue_info {
> + struct sock *sk_handle;
> + struct ixgbe_user_dma_region regions[MAX_USER_DMA_REGIONS_PER_SOCKET];
> + int num_of_regions;
> +};
> +
> struct ixgbe_rx_queue_stats {
> u64 rsc_count;
> u64 rsc_flush;
> @@ -673,6 +687,9 @@ struct ixgbe_adapter {
>
> struct ixgbe_q_vector *q_vector[MAX_Q_VECTORS];
>
> + /* Direct User Space Queues */
> + struct ixgbe_user_queue_info user_queue_info[MAX_RX_QUEUES];
> +
> /* DCB parameters */
> struct ieee_pfc *ixgbe_ieee_pfc;
> struct ieee_ets *ixgbe_ieee_ets;
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
> index e5be0dd..f180a58 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
> @@ -2598,12 +2598,17 @@ static int ixgbe_add_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
> if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
> return -EOPNOTSUPP;
>
> + if (fsp->ring_cookie > MAX_RX_QUEUES)
> + return -EINVAL;
> +
> /*
> * Don't allow programming if the action is a queue greater than
> - * the number of online Rx queues.
> + * the number of online Rx queues unless it is a user space
> + * queue.
> */
> if ((fsp->ring_cookie != RX_CLS_FLOW_DISC) &&
> - (fsp->ring_cookie >= adapter->num_rx_queues))
> + (fsp->ring_cookie >= adapter->num_rx_queues) &&
> + !adapter->user_queue_info[fsp->ring_cookie].sk_handle)
> return -EINVAL;
>
> /* Don't allow indexes to exist outside of available space */
> @@ -2680,12 +2685,18 @@ static int ixgbe_add_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
> /* apply mask and compute/store hash */
> ixgbe_atr_compute_perfect_hash_82599(&input->filter, &mask);
>
> + /* Set input action to reg_idx for driver owned queues otherwise
> + * use the absolute index for user space queues.
> + */
> + if (fsp->ring_cookie < adapter->num_rx_queues &&
> + fsp->ring_cookie != IXGBE_FDIR_DROP_QUEUE)
> + input->action = adapter->rx_ring[input->action]->reg_idx;
> +
> /* program filters to filter memory */
> err = ixgbe_fdir_write_perfect_filter_82599(hw,
> - &input->filter, input->sw_idx,
> - (input->action == IXGBE_FDIR_DROP_QUEUE) ?
> - IXGBE_FDIR_DROP_QUEUE :
> - adapter->rx_ring[input->action]->reg_idx);
> + &input->filter,
> + input->sw_idx,
> + input->action);
> if (err)
> goto err_out_w_lock;
>
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> index 2ed2c7d..be5bde86 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> @@ -50,6 +50,9 @@
> #include <linux/if_bridge.h>
> #include <linux/prefetch.h>
> #include <scsi/fc/fc_fcoe.h>
> +#include <linux/mm.h>
> +#include <linux/if_packet.h>
> +#include <linux/iommu.h>
>
> #ifdef CONFIG_OF
> #include <linux/of_net.h>
> @@ -80,6 +83,12 @@ const char ixgbe_driver_version[] = DRV_VERSION;
> static const char ixgbe_copyright[] =
> "Copyright (c) 1999-2014 Intel Corporation.";
>
> +static unsigned int *dummy_page_buf;
> +
> +#ifndef CONFIG_DMA_MEMORY_PROTECTION
> +#define CONFIG_DMA_MEMORY_PROTECTION
> +#endif
> +
> static const struct ixgbe_info *ixgbe_info_tbl[] = {
> [board_82598] = &ixgbe_82598_info,
> [board_82599] = &ixgbe_82599_info,
> @@ -167,6 +176,76 @@ MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
> MODULE_LICENSE("GPL");
> MODULE_VERSION(DRV_VERSION);
>
> +enum ixgbe_legacy_rx_enum {
> + IXGBE_LEGACY_RX_FIELD_PKT_ADDR = 0, /* Packet buffer address */
> + IXGBE_LEGACY_RX_FIELD_LENGTH, /* Packet length */
> + IXGBE_LEGACY_RX_FIELD_CSUM, /* Fragment checksum */
> + IXGBE_LEGACY_RX_FIELD_STATUS, /* Descriptors status */
> + IXGBE_LEGACY_RX_FIELD_ERRORS, /* Receive errors */
> + IXGBE_LEGACY_RX_FIELD_VLAN, /* VLAN tag */
> +};
> +
> +enum ixgbe_legacy_tx_enum {
> + IXGBE_LEGACY_TX_FIELD_PKT_ADDR = 0, /* Packet buffer address */
> + IXGBE_LEGACY_TX_FIELD_LENGTH, /* Packet length */
> + IXGBE_LEGACY_TX_FIELD_CSO, /* Checksum offset*/
> + IXGBE_LEGACY_TX_FIELD_CMD, /* Descriptor control */
> + IXGBE_LEGACY_TX_FIELD_STATUS, /* Descriptor status */
> + IXGBE_LEGACY_TX_FIELD_RSVD, /* Reserved */
> + IXGBE_LEGACY_TX_FIELD_CSS, /* Checksum start */
> + IXGBE_LEGACY_TX_FIELD_VLAN_TAG, /* VLAN tag */
> +};
> +
> +/* IXGBE Receive Descriptor - Legacy */
> +static const struct tpacket_nic_desc_fld ixgbe_legacy_rx_desc[] = {
> + /* Packet buffer address */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_RX_FIELD_PKT_ADDR,
> + 0, 64, 64, BO_NATIVE)},
> + /* Packet length */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_RX_FIELD_LENGTH,
> + 64, 16, 8, BO_NATIVE)},
> + /* Fragment checksum */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_RX_FIELD_CSUM,
> + 80, 16, 8, BO_NATIVE)},
> + /* Descriptors status */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_RX_FIELD_STATUS,
> + 96, 8, 8, BO_NATIVE)},
> + /* Receive errors */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_RX_FIELD_ERRORS,
> + 104, 8, 8, BO_NATIVE)},
> + /* VLAN tag */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_RX_FIELD_VLAN,
> + 112, 16, 8, BO_NATIVE)},
> +};
> +
> +/* IXGBE Transmit Descriptor - Legacy */
> +static const struct tpacket_nic_desc_fld ixgbe_legacy_tx_desc[] = {
> + /* Packet buffer address */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_TX_FIELD_PKT_ADDR,
> + 0, 64, 64, BO_NATIVE)},
> + /* Data buffer length */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_TX_FIELD_LENGTH,
> + 64, 16, 8, BO_NATIVE)},
> + /* Checksum offset */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_TX_FIELD_CSO,
> + 80, 8, 8, BO_NATIVE)},
> + /* Command byte */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_TX_FIELD_CMD,
> + 88, 8, 8, BO_NATIVE)},
> + /* Transmitted status */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_TX_FIELD_STATUS,
> + 96, 4, 1, BO_NATIVE)},
> + /* Reserved */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_TX_FIELD_RSVD,
> + 100, 4, 1, BO_NATIVE)},
> + /* Checksum start */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_TX_FIELD_CSS,
> + 104, 8, 8, BO_NATIVE)},
> + /* VLAN tag */
> + {PACKET_NIC_DESC_FIELD(IXGBE_LEGACY_TX_FIELD_VLAN_TAG,
> + 112, 16, 8, BO_NATIVE)},
> +};
> +
> static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev);
>
> static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
> @@ -3137,6 +3216,17 @@ static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
> IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
> }
>
> +static bool ixgbe_have_user_queues(struct ixgbe_adapter *adapter)
> +{
> + int i;
> +
> + for (i = 0; i < MAX_RX_QUEUES; i++) {
> + if (adapter->user_queue_info[i].sk_handle)
> + return true;
> + }
> + return false;
> +}
> +
> static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
> struct ixgbe_ring *ring)
> {
> @@ -3171,7 +3261,8 @@ static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
> * and performance reasons.
> */
> if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
> - !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
> + !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en) ||
> + ixgbe_have_user_queues(adapter)) {
> for (i = 0; i < adapter->num_rx_queues; i++)
> ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
> } else {
> @@ -7938,6 +8029,306 @@ static void ixgbe_fwd_del(struct net_device *pdev, void *priv)
> kfree(fwd_adapter);
> }
>
> +static int ixgbe_ndo_split_queue_pairs(struct net_device *dev,
> + unsigned int start_from,
> + unsigned int qpairs_num,
> + struct sock *sk)
> +{
> + struct ixgbe_adapter *adapter = netdev_priv(dev);
> + unsigned int qpair_index;
> +
> + /* allocate whatever available qpairs */
> + if (start_from == -1) {
When is this wildcard case used? If the nic is configured to send
specific traffic to a specific rxqueue, then that queue has to be
mapped. When is an arbitrary queue acceptable?
> + unsigned int count = 0;
> +
> + for (qpair_index = adapter->num_rx_queues;
> + qpair_index < MAX_RX_QUEUES;
> + qpair_index++) {
> + if (!adapter->user_queue_info[qpair_index].sk_handle) {
> + count++;
> + if (count == qpairs_num) {
> + start_from = qpair_index - count + 1;
> + break;
> + }
> + } else {
> + count = 0;
> + }
> + }
> + }
> +
> + /* otherwise the caller specified exact queues */
> + if ((start_from > MAX_TX_QUEUES) ||
> + (start_from > MAX_RX_QUEUES) ||
> + (start_from + qpairs_num > MAX_TX_QUEUES) ||
> + (start_from + qpairs_num > MAX_RX_QUEUES))
> + return -EINVAL;
> +
> + /* If the qpairs are being used by the driver do not let user space
> + * consume the queues. Also if the queue has already been allocated
> + * to a socket do fail the request.
> + */
> + for (qpair_index = start_from;
> + qpair_index < start_from + qpairs_num;
> + qpair_index++) {
> + if ((qpair_index < adapter->num_tx_queues) ||
> + (qpair_index < adapter->num_rx_queues))
> + return -EINVAL;
is there a similar check to ensure that the driver does not increase its
number of queues with ethtool -X and subsumes user queues?
> +
> + if (adapter->user_queue_info[qpair_index].sk_handle)
> + return -EBUSY;
> + }
> +
> + /* remember the sk handle for each queue pair */
> + for (qpair_index = start_from;
> + qpair_index < start_from + qpairs_num;
> + qpair_index++) {
> + adapter->user_queue_info[qpair_index].sk_handle = sk;
> + adapter->user_queue_info[qpair_index].num_of_regions = 0;
> + }
> +
> + return 0;
> +}
> +
> +static int ixgbe_ndo_get_split_queue_pairs(struct net_device *dev,
> + unsigned int *start_from,
> + unsigned int *qpairs_num,
> + struct sock *sk)
> +{
> + struct ixgbe_adapter *adapter = netdev_priv(dev);
> + unsigned int qpair_index;
> + *qpairs_num = 0;
> +
> + for (qpair_index = adapter->num_tx_queues;
> + qpair_index < MAX_RX_QUEUES;
> + qpair_index++) {
> + if (adapter->user_queue_info[qpair_index].sk_handle == sk) {
> + if (*qpairs_num == 0)
> + *start_from = qpair_index;
> + *qpairs_num = *qpairs_num + 1;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int ixgbe_ndo_return_queue_pairs(struct net_device *dev, struct sock *sk)
> +{
> + struct ixgbe_adapter *adapter = netdev_priv(dev);
> + struct ixgbe_user_queue_info *info;
> + unsigned int qpair_index;
> +
> + for (qpair_index = adapter->num_tx_queues;
> + qpair_index < MAX_RX_QUEUES;
> + qpair_index++) {
> + info = &adapter->user_queue_info[qpair_index];
> +
> + if (info->sk_handle == sk) {
> + info->sk_handle = NULL;
> + info->num_of_regions = 0;
> + }
> + }
> +
> + return 0;
> +}
> +
> +/* Rx descriptor starts from 0x1000 and Tx descriptor starts from 0x6000
> + * both the TX and RX descriptors use 4K pages.
> + */
> +#define RX_DESC_ADDR_OFFSET 0x1000
> +#define TX_DESC_ADDR_OFFSET 0x6000
> +#define PAGE_SIZE_4K 4096
> +
> +static int
> +ixgbe_ndo_qpair_map_region(struct net_device *dev,
> + struct tpacket_dev_qpair_map_region_info *info)
> +{
> + struct ixgbe_adapter *adapter = netdev_priv(dev);
> +
> + /* no need to map systme memory to userspace for ixgbe */
> + info->tp_dev_sysm_sz = 0;
> + info->tp_num_sysm_map_regions = 0;
> +
> + info->tp_dev_bar_sz = pci_resource_len(adapter->pdev, 0);
> + info->tp_num_map_regions = 2;
> +
> + info->tp_regions[0].page_offset = RX_DESC_ADDR_OFFSET;
> + info->tp_regions[0].page_sz = PAGE_SIZE;
> + info->tp_regions[0].page_cnt = 1;
> + info->tp_regions[1].page_offset = TX_DESC_ADDR_OFFSET;
> + info->tp_regions[1].page_sz = PAGE_SIZE;
> + info->tp_regions[1].page_cnt = 1;
> +
> + return 0;
> +}
> +
> +static int ixgbe_ndo_get_device_desc_info(struct net_device *dev,
> + struct tpacket_dev_info *dev_info)
> +{
> + struct ixgbe_adapter *adapter = netdev_priv(dev);
> + int max_queues;
> + int i;
> + __u8 flds_rx = sizeof(ixgbe_legacy_rx_desc) /
> + sizeof(struct tpacket_nic_desc_fld);
> + __u8 flds_tx = sizeof(ixgbe_legacy_tx_desc) /
> + sizeof(struct tpacket_nic_desc_fld);
> +
> + max_queues = max(adapter->num_rx_queues, adapter->num_tx_queues);
> +
> + dev_info->tp_device_id = adapter->hw.device_id;
> + dev_info->tp_vendor_id = adapter->hw.vendor_id;
> + dev_info->tp_subsystem_device_id = adapter->hw.subsystem_device_id;
> + dev_info->tp_subsystem_vendor_id = adapter->hw.subsystem_vendor_id;
> + dev_info->tp_revision_id = adapter->hw.revision_id;
> + dev_info->tp_numa_node = dev_to_node(&dev->dev);
> +
> + dev_info->tp_num_total_qpairs = min(MAX_RX_QUEUES, MAX_TX_QUEUES);
> + dev_info->tp_num_inuse_qpairs = max_queues;
> +
> + dev_info->tp_num_rx_desc_fmt = 1;
> + dev_info->tp_num_tx_desc_fmt = 1;
> +
> + dev_info->tp_rx_dexpr[0].version = 1;
> + dev_info->tp_rx_dexpr[0].size = sizeof(union ixgbe_adv_rx_desc);
> + dev_info->tp_rx_dexpr[0].byte_order = BO_NATIVE;
> + dev_info->tp_rx_dexpr[0].num_of_fld = flds_rx;
> + for (i = 0; i < dev_info->tp_rx_dexpr[0].num_of_fld; i++)
> + memcpy(&dev_info->tp_rx_dexpr[0].fields[i],
> + &ixgbe_legacy_rx_desc[i],
> + sizeof(struct tpacket_nic_desc_fld));
> +
> + dev_info->tp_tx_dexpr[0].version = 1;
> + dev_info->tp_tx_dexpr[0].size = sizeof(union ixgbe_adv_tx_desc);
> + dev_info->tp_tx_dexpr[0].byte_order = BO_NATIVE;
> + dev_info->tp_tx_dexpr[0].num_of_fld = flds_tx;
> + for (i = 0; i < dev_info->tp_rx_dexpr[0].num_of_fld; i++)
> + memcpy(&dev_info->tp_tx_dexpr[0].fields[i],
> + &ixgbe_legacy_tx_desc[i],
> + sizeof(struct tpacket_nic_desc_fld));
> +
> + return 0;
> +}
> +
> +static int
> +ixgbe_ndo_qpair_page_map(struct vm_area_struct *vma, struct net_device *dev)
> +{
> + struct ixgbe_adapter *adapter = netdev_priv(dev);
> + phys_addr_t phy_addr = pci_resource_start(adapter->pdev, 0);
> + unsigned long pfn_rx = (phy_addr + RX_DESC_ADDR_OFFSET) >> PAGE_SHIFT;
> + unsigned long pfn_tx = (phy_addr + TX_DESC_ADDR_OFFSET) >> PAGE_SHIFT;
> + unsigned long dummy_page_phy;
> + pgprot_t pre_vm_page_prot;
> + unsigned long start;
> + unsigned int i;
> + int err;
> +
> + if (!dummy_page_buf) {
> + dummy_page_buf = kzalloc(PAGE_SIZE_4K, GFP_KERNEL);
> + if (!dummy_page_buf)
> + return -ENOMEM;
> +
> + for (i = 0; i < PAGE_SIZE_4K / sizeof(unsigned int); i++)
> + dummy_page_buf[i] = 0xdeadbeef;
> + }
> +
> + dummy_page_phy = virt_to_phys(dummy_page_buf);
> + pre_vm_page_prot = vma->vm_page_prot;
> + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
> +
> + /* assume the vm_start is 4K aligned address */
> + for (start = vma->vm_start;
> + start < vma->vm_end;
> + start += PAGE_SIZE_4K) {
> + if (start == vma->vm_start + RX_DESC_ADDR_OFFSET) {
> + err = remap_pfn_range(vma, start, pfn_rx, PAGE_SIZE_4K,
> + vma->vm_page_prot);
> + if (err)
> + return -EAGAIN;
> + } else if (start == vma->vm_start + TX_DESC_ADDR_OFFSET) {
> + err = remap_pfn_range(vma, start, pfn_tx, PAGE_SIZE_4K,
> + vma->vm_page_prot);
> + if (err)
> + return -EAGAIN;
> + } else {
> + unsigned long addr = dummy_page_phy > PAGE_SHIFT;
> +
> + err = remap_pfn_range(vma, start, addr, PAGE_SIZE_4K,
> + pre_vm_page_prot);
> + if (err)
> + return -EAGAIN;
> + }
> + }
> + return 0;
> +}
> +
> +static int
> +ixgbe_ndo_val_dma_mem_region_map(struct net_device *dev,
> + struct tpacket_dma_mem_region *region,
> + struct sock *sk)
> +{
> + struct ixgbe_adapter *adapter = netdev_priv(dev);
> + unsigned int qpair_index, i;
> + struct ixgbe_user_queue_info *info;
> +
> +#ifdef CONFIG_DMA_MEMORY_PROTECTION
> + /* IOVA not equal to physical address means IOMMU takes effect */
> + if (region->phys_addr == region->iova)
> + return -EFAULT;
> +#endif
> +
> + for (qpair_index = adapter->num_tx_queues;
> + qpair_index < MAX_RX_QUEUES;
> + qpair_index++) {
> + info = &adapter->user_queue_info[qpair_index];
> + i = info->num_of_regions;
> +
> + if (info->sk_handle != sk)
> + continue;
> +
> + if (info->num_of_regions >= MAX_USER_DMA_REGIONS_PER_SOCKET)
> + return -EFAULT;
> +
> + info->regions[i].dma_region_size = region->size;
> + info->regions[i].direction = region->direction;
> + info->regions[i].dma_region_iova = region->iova;
> + info->num_of_regions++;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +ixgbe_get_dma_region_info(struct net_device *dev,
> + struct tpacket_dma_mem_region *region,
> + struct sock *sk)
> +{
> + struct ixgbe_adapter *adapter = netdev_priv(dev);
> + struct ixgbe_user_queue_info *info;
> + unsigned int qpair_index;
> +
> + for (qpair_index = adapter->num_tx_queues;
> + qpair_index < MAX_RX_QUEUES;
> + qpair_index++) {
> + int i;
> +
> + info = &adapter->user_queue_info[qpair_index];
> + if (info->sk_handle != sk)
> + continue;
> +
> + for (i = 0; i <= info->num_of_regions; i++) {
> + struct ixgbe_user_dma_region *r;
> +
> + r = &info->regions[i];
> + if ((r->dma_region_size == region->size) &&
> + (r->direction == region->direction)) {
> + region->iova = r->dma_region_iova;
> + return 0;
> + }
> + }
> + }
> +
> + return -1;
> +}
> +
> static const struct net_device_ops ixgbe_netdev_ops = {
> .ndo_open = ixgbe_open,
> .ndo_stop = ixgbe_close,
> @@ -7982,6 +8373,15 @@ static const struct net_device_ops ixgbe_netdev_ops = {
> .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
> .ndo_dfwd_add_station = ixgbe_fwd_add,
> .ndo_dfwd_del_station = ixgbe_fwd_del,
> +
> + .ndo_split_queue_pairs = ixgbe_ndo_split_queue_pairs,
> + .ndo_get_split_queue_pairs = ixgbe_ndo_get_split_queue_pairs,
> + .ndo_return_queue_pairs = ixgbe_ndo_return_queue_pairs,
> + .ndo_get_device_desc_info = ixgbe_ndo_get_device_desc_info,
> + .ndo_direct_qpair_page_map = ixgbe_ndo_qpair_page_map,
> + .ndo_get_dma_region_info = ixgbe_get_dma_region_info,
> + .ndo_get_device_qpair_map_region_info = ixgbe_ndo_qpair_map_region,
> + .ndo_validate_dma_mem_region_map = ixgbe_ndo_val_dma_mem_region_map,
> };
>
> /**
> @@ -8203,7 +8603,9 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> hw->back = adapter;
> adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
>
> - hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
> + hw->pci_hw_addr = pci_resource_start(pdev, 0);
> +
> + hw->hw_addr = ioremap(hw->pci_hw_addr,
> pci_resource_len(pdev, 0));
> adapter->io_addr = hw->hw_addr;
> if (!hw->hw_addr) {
> @@ -8875,6 +9277,7 @@ module_init(ixgbe_init_module);
> **/
> static void __exit ixgbe_exit_module(void)
> {
> + kfree(dummy_page_buf);
> #ifdef CONFIG_IXGBE_DCA
> dca_unregister_notify(&dca_notifier);
> #endif
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> index d101b25..4034d31 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> @@ -3180,6 +3180,7 @@ struct ixgbe_mbx_info {
>
> struct ixgbe_hw {
> u8 __iomem *hw_addr;
> + phys_addr_t pci_hw_addr;
> void *back;
> struct ixgbe_mac_info mac;
> struct ixgbe_addr_filter_info addr_ctrl;
>
> --
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