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author | Rusty Russell <rusty@rustcorp.com.au> | 2013-10-14 18:11:51 +1030 |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2013-10-17 10:55:37 +1030 |
commit | 855e0c5288177bcb193f6f6316952d2490478e1c (patch) | |
tree | 7c5cfed44c9def1a7ca3388f37a9520de52af44b /drivers/net | |
parent | 0b90d0622ad290b3717a13489b396af52aea9d2d (diff) | |
download | linux-855e0c5288177bcb193f6f6316952d2490478e1c.tar.gz linux-855e0c5288177bcb193f6f6316952d2490478e1c.tar.bz2 linux-855e0c5288177bcb193f6f6316952d2490478e1c.zip |
virtio: use size-based config accessors.
This lets the transport do endian conversion if necessary, and insulates
the drivers from the difference.
Most drivers can use the simple helpers virtio_cread() and virtio_cwrite().
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/caif/caif_virtio.c | 23 | ||||
-rw-r--r-- | drivers/net/virtio_net.c | 28 |
2 files changed, 29 insertions, 22 deletions
diff --git a/drivers/net/caif/caif_virtio.c b/drivers/net/caif/caif_virtio.c index b9ed1288ce2d..985608634f8c 100644 --- a/drivers/net/caif/caif_virtio.c +++ b/drivers/net/caif/caif_virtio.c @@ -686,18 +686,19 @@ static int cfv_probe(struct virtio_device *vdev) goto err; /* Get the CAIF configuration from virtio config space, if available */ -#define GET_VIRTIO_CONFIG_OPS(_v, _var, _f) \ - ((_v)->config->get(_v, offsetof(struct virtio_caif_transf_config, _f), \ - &_var, \ - FIELD_SIZEOF(struct virtio_caif_transf_config, _f))) - if (vdev->config->get) { - GET_VIRTIO_CONFIG_OPS(vdev, cfv->tx_hr, headroom); - GET_VIRTIO_CONFIG_OPS(vdev, cfv->rx_hr, headroom); - GET_VIRTIO_CONFIG_OPS(vdev, cfv->tx_tr, tailroom); - GET_VIRTIO_CONFIG_OPS(vdev, cfv->rx_tr, tailroom); - GET_VIRTIO_CONFIG_OPS(vdev, cfv->mtu, mtu); - GET_VIRTIO_CONFIG_OPS(vdev, cfv->mru, mtu); + virtio_cread(vdev, struct virtio_caif_transf_config, headroom, + &cfv->tx_hr); + virtio_cread(vdev, struct virtio_caif_transf_config, headroom, + &cfv->rx_hr); + virtio_cread(vdev, struct virtio_caif_transf_config, tailroom, + &cfv->tx_tr); + virtio_cread(vdev, struct virtio_caif_transf_config, tailroom, + &cfv->rx_tr); + virtio_cread(vdev, struct virtio_caif_transf_config, mtu, + &cfv->mtu); + virtio_cread(vdev, struct virtio_caif_transf_config, mtu, + &cfv->mru); } else { cfv->tx_hr = CFV_DEF_HEADROOM; cfv->rx_hr = CFV_DEF_HEADROOM; diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 2ad3d96d4a7c..ee022714eadb 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -852,8 +852,13 @@ static int virtnet_set_mac_address(struct net_device *dev, void *p) return -EINVAL; } } else if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) { - vdev->config->set(vdev, offsetof(struct virtio_net_config, mac), - addr->sa_data, dev->addr_len); + unsigned int i; + + /* Naturally, this has an atomicity problem. */ + for (i = 0; i < dev->addr_len; i++) + virtio_cwrite8(vdev, + offsetof(struct virtio_net_config, mac) + + i, addr->sa_data[i]); } eth_commit_mac_addr_change(dev, p); @@ -1266,9 +1271,8 @@ static void virtnet_config_changed_work(struct work_struct *work) if (!vi->config_enable) goto done; - if (virtio_config_val(vi->vdev, VIRTIO_NET_F_STATUS, - offsetof(struct virtio_net_config, status), - &v) < 0) + if (virtio_cread_feature(vi->vdev, VIRTIO_NET_F_STATUS, + struct virtio_net_config, status, &v) < 0) goto done; if (v & VIRTIO_NET_S_ANNOUNCE) { @@ -1490,9 +1494,9 @@ static int virtnet_probe(struct virtio_device *vdev) u16 max_queue_pairs; /* Find if host supports multiqueue virtio_net device */ - err = virtio_config_val(vdev, VIRTIO_NET_F_MQ, - offsetof(struct virtio_net_config, - max_virtqueue_pairs), &max_queue_pairs); + err = virtio_cread_feature(vdev, VIRTIO_NET_F_MQ, + struct virtio_net_config, + max_virtqueue_pairs, &max_queue_pairs); /* We need at least 2 queue's */ if (err || max_queue_pairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || @@ -1544,9 +1548,11 @@ static int virtnet_probe(struct virtio_device *vdev) dev->vlan_features = dev->features; /* Configuration may specify what MAC to use. Otherwise random. */ - if (virtio_config_val_len(vdev, VIRTIO_NET_F_MAC, - offsetof(struct virtio_net_config, mac), - dev->dev_addr, dev->addr_len) < 0) + if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) + virtio_cread_bytes(vdev, + offsetof(struct virtio_net_config, mac), + dev->dev_addr, dev->addr_len); + else eth_hw_addr_random(dev); /* Set up our device-specific information */ |