[dpdk-dev] [PATCH 05/15] net/virtio: save notify bar ID in virtio HW struct

[Maxime Coquelin]

SAving the notify bar ID in the virtio HW struct will be
used by the virtio-vdpa driver in its .get_notify_area()
callback.

Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
 drivers/net/virtio/virtio_pci.c | 6 ++++--
 drivers/net/virtio/virtio_pci.h | 1 +
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 4468e89cb..762847d70 100644
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -617,12 +617,14 @@ virtio_read_caps(struct rte_pci_device *dev, struct 
virtio_hw *hw)
                        ret = rte_pci_read_config(dev,
                                        &hw->notify_off_multiplier,
                                        4, pos + sizeof(cap));
-                       if (ret != 4)
+                       if (ret != 4) {
                                PMD_INIT_LOG(DEBUG,
                                        "failed to read notify_off_multiplier, 
ret %d",
                                        ret);
-                       else
+                       } else {
                                hw->notify_base = get_cfg_addr(dev, &cap);
+                               hw->notify_region = cap.bar;
+                       }
                        break;
                case VIRTIO_PCI_CAP_DEVICE_CFG:
                        hw->dev_cfg = get_cfg_addr(dev, &cap);
diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h
index 56f89a454..afdcc906f 100644
--- a/drivers/net/virtio/virtio_pci.h
+++ b/drivers/net/virtio/virtio_pci.h
@@ -256,6 +256,7 @@ struct virtio_hw {
        uint32_t    notify_off_multiplier;
        uint8_t     *isr;
        uint16_t    *notify_base;
+       uint8_t     notify_region;
        struct virtio_pci_common_cfg *common_cfg;
        struct virtio_net_config *dev_cfg;
        void        *virtio_user_dev;
-- 
2.21.0