common/mlx5: add Direct Verbs constants for Windows
[dpdk.git] / drivers / net / ngbe / ngbe_pf.c
index dc7bc03..7f9c04f 100644 (file)
@@ -12,6 +12,8 @@
 #include "ngbe_ethdev.h"
 
 #define NGBE_MAX_VFTA     (128)
+#define NGBE_VF_MSG_SIZE_DEFAULT 1
+#define NGBE_VF_GET_QUEUE_MSG_SIZE 5
 
 static inline uint16_t
 dev_num_vf(struct rte_eth_dev *eth_dev)
@@ -39,6 +41,16 @@ int ngbe_vf_perm_addr_gen(struct rte_eth_dev *dev, uint16_t vf_num)
        return 0;
 }
 
+static inline int
+ngbe_mb_intr_setup(struct rte_eth_dev *dev)
+{
+       struct ngbe_interrupt *intr = ngbe_dev_intr(dev);
+
+       intr->mask_misc |= NGBE_ICRMISC_VFMBX;
+
+       return 0;
+}
+
 int ngbe_pf_host_init(struct rte_eth_dev *eth_dev)
 {
        struct ngbe_vf_info **vfinfo = NGBE_DEV_VFDATA(eth_dev);
@@ -85,6 +97,9 @@ int ngbe_pf_host_init(struct rte_eth_dev *eth_dev)
        /* init_mailbox_params */
        hw->mbx.init_params(hw);
 
+       /* set mb interrupt mask */
+       ngbe_mb_intr_setup(eth_dev);
+
        return ret;
 }
 
@@ -194,3 +209,551 @@ int ngbe_pf_host_configure(struct rte_eth_dev *eth_dev)
        return 0;
 }
 
+static void
+ngbe_set_rx_mode(struct rte_eth_dev *eth_dev)
+{
+       struct rte_eth_dev_data *dev_data = eth_dev->data;
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       u32 fctrl, vmolr;
+       uint16_t vfn = dev_num_vf(eth_dev);
+
+       /* disable store-bad-packets */
+       wr32m(hw, NGBE_SECRXCTL, NGBE_SECRXCTL_SAVEBAD, 0);
+
+       /* Check for Promiscuous and All Multicast modes */
+       fctrl = rd32m(hw, NGBE_PSRCTL,
+                       ~(NGBE_PSRCTL_UCP | NGBE_PSRCTL_MCP));
+       fctrl |= NGBE_PSRCTL_BCA |
+                NGBE_PSRCTL_MCHFENA;
+
+       vmolr = rd32m(hw, NGBE_POOLETHCTL(vfn),
+                       ~(NGBE_POOLETHCTL_UCP |
+                         NGBE_POOLETHCTL_MCP |
+                         NGBE_POOLETHCTL_UCHA |
+                         NGBE_POOLETHCTL_MCHA));
+       vmolr |= NGBE_POOLETHCTL_BCA |
+                NGBE_POOLETHCTL_UTA |
+                NGBE_POOLETHCTL_VLA;
+
+       if (dev_data->promiscuous) {
+               fctrl |= NGBE_PSRCTL_UCP |
+                        NGBE_PSRCTL_MCP;
+               /* pf don't want packets routing to vf, so clear UPE */
+               vmolr |= NGBE_POOLETHCTL_MCP;
+       } else if (dev_data->all_multicast) {
+               fctrl |= NGBE_PSRCTL_MCP;
+               vmolr |= NGBE_POOLETHCTL_MCP;
+       } else {
+               vmolr |= NGBE_POOLETHCTL_UCHA;
+               vmolr |= NGBE_POOLETHCTL_MCHA;
+       }
+
+       wr32(hw, NGBE_POOLETHCTL(vfn), vmolr);
+
+       wr32(hw, NGBE_PSRCTL, fctrl);
+
+       ngbe_vlan_hw_strip_config(eth_dev);
+}
+
+static inline void
+ngbe_vf_reset_event(struct rte_eth_dev *eth_dev, uint16_t vf)
+{
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       struct ngbe_vf_info *vfinfo = *(NGBE_DEV_VFDATA(eth_dev));
+       int rar_entry = hw->mac.num_rar_entries - (vf + 1);
+       uint32_t vmolr = rd32(hw, NGBE_POOLETHCTL(vf));
+
+       vmolr |= (NGBE_POOLETHCTL_UCHA |
+                       NGBE_POOLETHCTL_BCA | NGBE_POOLETHCTL_UTA);
+       wr32(hw, NGBE_POOLETHCTL(vf), vmolr);
+
+       wr32(hw, NGBE_POOLTAG(vf), 0);
+
+       /* reset multicast table array for vf */
+       vfinfo[vf].num_vf_mc_hashes = 0;
+
+       /* reset rx mode */
+       ngbe_set_rx_mode(eth_dev);
+
+       hw->mac.clear_rar(hw, rar_entry);
+}
+
+static inline void
+ngbe_vf_reset_msg(struct rte_eth_dev *eth_dev, uint16_t vf)
+{
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       uint32_t reg;
+       uint32_t vf_shift;
+       const uint8_t VFRE_SHIFT = 5;  /* VFRE 32 bits per slot */
+       const uint8_t VFRE_MASK = (uint8_t)((1U << VFRE_SHIFT) - 1);
+       uint8_t  nb_q_per_pool;
+       int i;
+
+       vf_shift = vf & VFRE_MASK;
+
+       /* enable transmit for vf */
+       reg = rd32(hw, NGBE_POOLTXENA(0));
+       reg |= (1 << vf_shift);
+       wr32(hw, NGBE_POOLTXENA(0), reg);
+
+       /* enable all queue drop for IOV */
+       nb_q_per_pool = RTE_ETH_DEV_SRIOV(eth_dev).nb_q_per_pool;
+       for (i = vf * nb_q_per_pool; i < (vf + 1) * nb_q_per_pool; i++) {
+               ngbe_flush(hw);
+               reg = 1 << (i % 32);
+               wr32m(hw, NGBE_QPRXDROP, reg, reg);
+       }
+
+       /* enable receive for vf */
+       reg = rd32(hw, NGBE_POOLRXENA(0));
+       reg |= (reg | (1 << vf_shift));
+       wr32(hw, NGBE_POOLRXENA(0), reg);
+
+       ngbe_vf_reset_event(eth_dev, vf);
+}
+
+static int
+ngbe_disable_vf_mc_promisc(struct rte_eth_dev *eth_dev, uint32_t vf)
+{
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       uint32_t vmolr;
+
+       vmolr = rd32(hw, NGBE_POOLETHCTL(vf));
+
+       PMD_DRV_LOG(INFO, "VF %u: disabling multicast promiscuous\n", vf);
+
+       vmolr &= ~NGBE_POOLETHCTL_MCP;
+
+       wr32(hw, NGBE_POOLETHCTL(vf), vmolr);
+
+       return 0;
+}
+
+static int
+ngbe_vf_reset(struct rte_eth_dev *eth_dev, uint16_t vf, uint32_t *msgbuf)
+{
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       struct ngbe_vf_info *vfinfo = *(NGBE_DEV_VFDATA(eth_dev));
+       unsigned char *vf_mac = vfinfo[vf].vf_mac_addresses;
+       int rar_entry = hw->mac.num_rar_entries - (vf + 1);
+       uint8_t *new_mac = (uint8_t *)(&msgbuf[1]);
+
+       ngbe_vf_reset_msg(eth_dev, vf);
+
+       hw->mac.set_rar(hw, rar_entry, vf_mac, vf, true);
+
+       /* Disable multicast promiscuous at reset */
+       ngbe_disable_vf_mc_promisc(eth_dev, vf);
+
+       /* reply to reset with ack and vf mac address */
+       msgbuf[0] = NGBE_VF_RESET | NGBE_VT_MSGTYPE_ACK;
+       rte_memcpy(new_mac, vf_mac, RTE_ETHER_ADDR_LEN);
+       /*
+        * Piggyback the multicast filter type so VF can compute the
+        * correct vectors
+        */
+       msgbuf[3] = hw->mac.mc_filter_type;
+       ngbe_write_mbx(hw, msgbuf, NGBE_VF_PERMADDR_MSG_LEN, vf);
+
+       return 0;
+}
+
+static int
+ngbe_vf_set_mac_addr(struct rte_eth_dev *eth_dev,
+               uint32_t vf, uint32_t *msgbuf)
+{
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       struct ngbe_vf_info *vfinfo = *(NGBE_DEV_VFDATA(eth_dev));
+       int rar_entry = hw->mac.num_rar_entries - (vf + 1);
+       uint8_t *new_mac = (uint8_t *)(&msgbuf[1]);
+       struct rte_ether_addr *ea = (struct rte_ether_addr *)new_mac;
+
+       if (rte_is_valid_assigned_ether_addr(ea)) {
+               rte_memcpy(vfinfo[vf].vf_mac_addresses, new_mac, 6);
+               return hw->mac.set_rar(hw, rar_entry, new_mac, vf, true);
+       }
+       return -1;
+}
+
+static int
+ngbe_vf_set_multicast(struct rte_eth_dev *eth_dev,
+               uint32_t vf, uint32_t *msgbuf)
+{
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       struct ngbe_vf_info *vfinfo = *(NGBE_DEV_VFDATA(eth_dev));
+       int nb_entries = (msgbuf[0] & NGBE_VT_MSGINFO_MASK) >>
+               NGBE_VT_MSGINFO_SHIFT;
+       uint16_t *hash_list = (uint16_t *)&msgbuf[1];
+       uint32_t mta_idx;
+       uint32_t mta_shift;
+       const uint32_t NGBE_MTA_INDEX_MASK = 0x7F;
+       const uint32_t NGBE_MTA_BIT_SHIFT = 5;
+       const uint32_t NGBE_MTA_BIT_MASK = (0x1 << NGBE_MTA_BIT_SHIFT) - 1;
+       uint32_t reg_val;
+       int i;
+       u32 vmolr = rd32(hw, NGBE_POOLETHCTL(vf));
+
+       /* Disable multicast promiscuous first */
+       ngbe_disable_vf_mc_promisc(eth_dev, vf);
+
+       /* only so many hash values supported */
+       nb_entries = RTE_MIN(nb_entries, NGBE_MAX_VF_MC_ENTRIES);
+
+       /* store the mc entries  */
+       vfinfo->num_vf_mc_hashes = (uint16_t)nb_entries;
+       for (i = 0; i < nb_entries; i++)
+               vfinfo->vf_mc_hashes[i] = hash_list[i];
+
+       if (nb_entries == 0) {
+               vmolr &= ~NGBE_POOLETHCTL_MCHA;
+               wr32(hw, NGBE_POOLETHCTL(vf), vmolr);
+               return 0;
+       }
+
+       for (i = 0; i < vfinfo->num_vf_mc_hashes; i++) {
+               mta_idx = (vfinfo->vf_mc_hashes[i] >> NGBE_MTA_BIT_SHIFT)
+                               & NGBE_MTA_INDEX_MASK;
+               mta_shift = vfinfo->vf_mc_hashes[i] & NGBE_MTA_BIT_MASK;
+               reg_val = rd32(hw, NGBE_MCADDRTBL(mta_idx));
+               reg_val |= (1 << mta_shift);
+               wr32(hw, NGBE_MCADDRTBL(mta_idx), reg_val);
+       }
+
+       vmolr |= NGBE_POOLETHCTL_MCHA;
+       wr32(hw, NGBE_POOLETHCTL(vf), vmolr);
+
+       return 0;
+}
+
+static int
+ngbe_vf_set_vlan(struct rte_eth_dev *eth_dev, uint32_t vf, uint32_t *msgbuf)
+{
+       int add, vid;
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       struct ngbe_vf_info *vfinfo = *(NGBE_DEV_VFDATA(eth_dev));
+
+       add = (msgbuf[0] & NGBE_VT_MSGINFO_MASK)
+               >> NGBE_VT_MSGINFO_SHIFT;
+       vid = NGBE_PSRVLAN_VID(msgbuf[1]);
+
+       if (add)
+               vfinfo[vf].vlan_count++;
+       else if (vfinfo[vf].vlan_count)
+               vfinfo[vf].vlan_count--;
+       return hw->mac.set_vfta(hw, vid, vf, (bool)add, false);
+}
+
+static int
+ngbe_set_vf_lpe(struct rte_eth_dev *eth_dev,
+               __rte_unused uint32_t vf, uint32_t *msgbuf)
+{
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       uint32_t max_frame = msgbuf[1];
+       uint32_t max_frs;
+
+       if (max_frame < RTE_ETHER_MIN_LEN ||
+                       max_frame > RTE_ETHER_MAX_JUMBO_FRAME_LEN)
+               return -1;
+
+       max_frs = rd32m(hw, NGBE_FRMSZ, NGBE_FRMSZ_MAX_MASK);
+       if (max_frs < max_frame) {
+               wr32m(hw, NGBE_FRMSZ, NGBE_FRMSZ_MAX_MASK,
+                       NGBE_FRMSZ_MAX(max_frame));
+       }
+
+       return 0;
+}
+
+static int
+ngbe_negotiate_vf_api(struct rte_eth_dev *eth_dev,
+               uint32_t vf, uint32_t *msgbuf)
+{
+       uint32_t api_version = msgbuf[1];
+       struct ngbe_vf_info *vfinfo = *NGBE_DEV_VFDATA(eth_dev);
+
+       switch (api_version) {
+       case ngbe_mbox_api_10:
+       case ngbe_mbox_api_11:
+       case ngbe_mbox_api_12:
+       case ngbe_mbox_api_13:
+               vfinfo[vf].api_version = (uint8_t)api_version;
+               return 0;
+       default:
+               break;
+       }
+
+       PMD_DRV_LOG(ERR, "Negotiate invalid api version %u from VF %d\n",
+               api_version, vf);
+
+       return -1;
+}
+
+static int
+ngbe_get_vf_queues(struct rte_eth_dev *eth_dev, uint32_t vf, uint32_t *msgbuf)
+{
+       struct ngbe_vf_info *vfinfo = *NGBE_DEV_VFDATA(eth_dev);
+       uint32_t default_q = 0;
+
+       /* Verify if the PF supports the mbox APIs version or not */
+       switch (vfinfo[vf].api_version) {
+       case ngbe_mbox_api_20:
+       case ngbe_mbox_api_11:
+       case ngbe_mbox_api_12:
+       case ngbe_mbox_api_13:
+               break;
+       default:
+               return -1;
+       }
+
+       /* Notify VF of Rx and Tx queue number */
+       msgbuf[NGBE_VF_RX_QUEUES] = RTE_ETH_DEV_SRIOV(eth_dev).nb_q_per_pool;
+       msgbuf[NGBE_VF_TX_QUEUES] = RTE_ETH_DEV_SRIOV(eth_dev).nb_q_per_pool;
+
+       /* Notify VF of default queue */
+       msgbuf[NGBE_VF_DEF_QUEUE] = default_q;
+
+       msgbuf[NGBE_VF_TRANS_VLAN] = 0;
+
+       return 0;
+}
+
+static int
+ngbe_set_vf_mc_promisc(struct rte_eth_dev *eth_dev,
+               uint32_t vf, uint32_t *msgbuf)
+{
+       struct ngbe_vf_info *vfinfo = *(NGBE_DEV_VFDATA(eth_dev));
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       int xcast_mode = msgbuf[1];     /* msgbuf contains the flag to enable */
+       u32 vmolr, fctrl, disable, enable;
+
+       switch (vfinfo[vf].api_version) {
+       case ngbe_mbox_api_12:
+               /* promisc introduced in 1.3 version */
+               if (xcast_mode == NGBEVF_XCAST_MODE_PROMISC)
+                       return -EOPNOTSUPP;
+               break;
+               /* Fall threw */
+       case ngbe_mbox_api_13:
+               break;
+       default:
+               return -1;
+       }
+
+       if (vfinfo[vf].xcast_mode == xcast_mode)
+               goto out;
+
+       switch (xcast_mode) {
+       case NGBEVF_XCAST_MODE_NONE:
+               disable = NGBE_POOLETHCTL_BCA | NGBE_POOLETHCTL_MCHA |
+                         NGBE_POOLETHCTL_MCP | NGBE_POOLETHCTL_UCP |
+                         NGBE_POOLETHCTL_VLP;
+               enable = 0;
+               break;
+       case NGBEVF_XCAST_MODE_MULTI:
+               disable = NGBE_POOLETHCTL_MCP | NGBE_POOLETHCTL_UCP |
+                         NGBE_POOLETHCTL_VLP;
+               enable = NGBE_POOLETHCTL_BCA | NGBE_POOLETHCTL_MCHA;
+               break;
+       case NGBEVF_XCAST_MODE_ALLMULTI:
+               disable = NGBE_POOLETHCTL_UCP | NGBE_POOLETHCTL_VLP;
+               enable = NGBE_POOLETHCTL_BCA | NGBE_POOLETHCTL_MCHA |
+                        NGBE_POOLETHCTL_MCP;
+               break;
+       case NGBEVF_XCAST_MODE_PROMISC:
+               fctrl = rd32(hw, NGBE_PSRCTL);
+               if (!(fctrl & NGBE_PSRCTL_UCP)) {
+                       /* VF promisc requires PF in promisc */
+                       PMD_DRV_LOG(ERR,
+                              "Enabling VF promisc requires PF in promisc\n");
+                       return -1;
+               }
+
+               disable = 0;
+               enable = NGBE_POOLETHCTL_BCA | NGBE_POOLETHCTL_MCHA |
+                        NGBE_POOLETHCTL_MCP | NGBE_POOLETHCTL_UCP |
+                        NGBE_POOLETHCTL_VLP;
+               break;
+       default:
+               return -1;
+       }
+
+       vmolr = rd32(hw, NGBE_POOLETHCTL(vf));
+       vmolr &= ~disable;
+       vmolr |= enable;
+       wr32(hw, NGBE_POOLETHCTL(vf), vmolr);
+       vfinfo[vf].xcast_mode = xcast_mode;
+
+out:
+       msgbuf[1] = xcast_mode;
+
+       return 0;
+}
+
+static int
+ngbe_set_vf_macvlan_msg(struct rte_eth_dev *dev, uint32_t vf, uint32_t *msgbuf)
+{
+       struct ngbe_hw *hw = ngbe_dev_hw(dev);
+       struct ngbe_vf_info *vf_info = *(NGBE_DEV_VFDATA(dev));
+       uint8_t *new_mac = (uint8_t *)(&msgbuf[1]);
+       struct rte_ether_addr *ea = (struct rte_ether_addr *)new_mac;
+       int index = (msgbuf[0] & NGBE_VT_MSGINFO_MASK) >>
+                   NGBE_VT_MSGINFO_SHIFT;
+
+       if (index) {
+               if (!rte_is_valid_assigned_ether_addr(ea)) {
+                       PMD_DRV_LOG(ERR, "set invalid mac vf:%d\n", vf);
+                       return -1;
+               }
+
+               vf_info[vf].mac_count++;
+
+               hw->mac.set_rar(hw, vf_info[vf].mac_count,
+                               new_mac, vf, true);
+       } else {
+               if (vf_info[vf].mac_count) {
+                       hw->mac.clear_rar(hw, vf_info[vf].mac_count);
+                       vf_info[vf].mac_count = 0;
+               }
+       }
+       return 0;
+}
+
+static int
+ngbe_rcv_msg_from_vf(struct rte_eth_dev *eth_dev, uint16_t vf)
+{
+       uint16_t mbx_size = NGBE_P2VMBX_SIZE;
+       uint16_t msg_size = NGBE_VF_MSG_SIZE_DEFAULT;
+       uint32_t msgbuf[NGBE_P2VMBX_SIZE];
+       int32_t retval;
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       struct ngbe_vf_info *vfinfo = *NGBE_DEV_VFDATA(eth_dev);
+       struct ngbe_mb_event_param ret_param;
+
+       retval = ngbe_read_mbx(hw, msgbuf, mbx_size, vf);
+       if (retval) {
+               PMD_DRV_LOG(ERR, "Error mbx recv msg from VF %d", vf);
+               return retval;
+       }
+
+       /* do nothing with the message already been processed */
+       if (msgbuf[0] & (NGBE_VT_MSGTYPE_ACK | NGBE_VT_MSGTYPE_NACK))
+               return retval;
+
+       /* flush the ack before we write any messages back */
+       ngbe_flush(hw);
+
+       /**
+        * initialise structure to send to user application
+        * will return response from user in retval field
+        */
+       ret_param.retval = NGBE_MB_EVENT_PROCEED;
+       ret_param.vfid = vf;
+       ret_param.msg_type = msgbuf[0] & 0xFFFF;
+       ret_param.msg = (void *)msgbuf;
+
+       /* perform VF reset */
+       if (msgbuf[0] == NGBE_VF_RESET) {
+               int ret = ngbe_vf_reset(eth_dev, vf, msgbuf);
+
+               vfinfo[vf].clear_to_send = true;
+
+               /* notify application about VF reset */
+               rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_VF_MBOX,
+                                             &ret_param);
+               return ret;
+       }
+
+       /**
+        * ask user application if we allowed to perform those functions
+        * if we get ret_param.retval == RTE_PMD_COMPAT_MB_EVENT_PROCEED
+        * then business as usual,
+        * if 0, do nothing and send ACK to VF
+        * if ret_param.retval > 1, do nothing and send NAK to VF
+        */
+       rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_VF_MBOX,
+                                     &ret_param);
+
+       retval = ret_param.retval;
+
+       /* check & process VF to PF mailbox message */
+       switch ((msgbuf[0] & 0xFFFF)) {
+       case NGBE_VF_SET_MAC_ADDR:
+               if (retval == NGBE_MB_EVENT_PROCEED)
+                       retval = ngbe_vf_set_mac_addr(eth_dev, vf, msgbuf);
+               break;
+       case NGBE_VF_SET_MULTICAST:
+               if (retval == NGBE_MB_EVENT_PROCEED)
+                       retval = ngbe_vf_set_multicast(eth_dev, vf, msgbuf);
+               break;
+       case NGBE_VF_SET_LPE:
+               if (retval == NGBE_MB_EVENT_PROCEED)
+                       retval = ngbe_set_vf_lpe(eth_dev, vf, msgbuf);
+               break;
+       case NGBE_VF_SET_VLAN:
+               if (retval == NGBE_MB_EVENT_PROCEED)
+                       retval = ngbe_vf_set_vlan(eth_dev, vf, msgbuf);
+               break;
+       case NGBE_VF_API_NEGOTIATE:
+               retval = ngbe_negotiate_vf_api(eth_dev, vf, msgbuf);
+               break;
+       case NGBE_VF_GET_QUEUES:
+               retval = ngbe_get_vf_queues(eth_dev, vf, msgbuf);
+               msg_size = NGBE_VF_GET_QUEUE_MSG_SIZE;
+               break;
+       case NGBE_VF_UPDATE_XCAST_MODE:
+               if (retval == NGBE_MB_EVENT_PROCEED)
+                       retval = ngbe_set_vf_mc_promisc(eth_dev, vf, msgbuf);
+               break;
+       case NGBE_VF_SET_MACVLAN:
+               if (retval == NGBE_MB_EVENT_PROCEED)
+                       retval = ngbe_set_vf_macvlan_msg(eth_dev, vf, msgbuf);
+               break;
+       default:
+               PMD_DRV_LOG(DEBUG, "Unhandled Msg %8.8x", (uint32_t)msgbuf[0]);
+               retval = NGBE_ERR_MBX;
+               break;
+       }
+
+       /* response the VF according to the message process result */
+       if (retval)
+               msgbuf[0] |= NGBE_VT_MSGTYPE_NACK;
+       else
+               msgbuf[0] |= NGBE_VT_MSGTYPE_ACK;
+
+       msgbuf[0] |= NGBE_VT_MSGTYPE_CTS;
+
+       ngbe_write_mbx(hw, msgbuf, msg_size, vf);
+
+       return retval;
+}
+
+static inline void
+ngbe_rcv_ack_from_vf(struct rte_eth_dev *eth_dev, uint16_t vf)
+{
+       uint32_t msg = NGBE_VT_MSGTYPE_NACK;
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+       struct ngbe_vf_info *vfinfo = *NGBE_DEV_VFDATA(eth_dev);
+
+       if (!vfinfo[vf].clear_to_send)
+               ngbe_write_mbx(hw, &msg, 1, vf);
+}
+
+void ngbe_pf_mbx_process(struct rte_eth_dev *eth_dev)
+{
+       uint16_t vf;
+       struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
+
+       for (vf = 0; vf < dev_num_vf(eth_dev); vf++) {
+               /* check & process vf function level reset */
+               if (!ngbe_check_for_rst(hw, vf))
+                       ngbe_vf_reset_event(eth_dev, vf);
+
+               /* check & process vf mailbox messages */
+               if (!ngbe_check_for_msg(hw, vf))
+                       ngbe_rcv_msg_from_vf(eth_dev, vf);
+
+               /* check & process acks from vf */
+               if (!ngbe_check_for_ack(hw, vf))
+                       ngbe_rcv_ack_from_vf(eth_dev, vf);
+       }
+}