From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, jasowang@redhat.com,
virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org
Cc: shahafs@mellanox.com
Subject: [PATCH V2 07/19] virtio-pci-modern: introduce helpers for setting and getting features
Date: Fri, 4 Dec 2020 12:03:41 +0800 [thread overview]
Message-ID: <20201204040353.21679-8-jasowang@redhat.com> (raw)
In-Reply-To: <20201204040353.21679-1-jasowang@redhat.com>
This patch introduces helpers for setting and getting features.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/virtio/virtio_pci_modern.c | 43 +++++++++++++++++++++++-------
1 file changed, 33 insertions(+), 10 deletions(-)
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index ccde0a41209a..cb14fc334a9c 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -137,12 +137,16 @@ static void __iomem *map_capability(struct pci_dev *dev, int off,
return p;
}
-/* virtio config->get_features() implementation */
-static u64 vp_get_features(struct virtio_device *vdev)
+/*
+ * vp_modern_get_features - get features from device
+ * @mdev: the modern virtio-pci device
+ *
+ * Returns the features read from the device
+ */
+static u64 vp_modern_get_features(struct virtio_pci_modern_device *mdev)
{
- struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
+
u64 features;
vp_iowrite32(0, &cfg->device_feature_select);
@@ -153,6 +157,14 @@ static u64 vp_get_features(struct virtio_device *vdev)
return features;
}
+/* virtio config->get_features() implementation */
+static u64 vp_get_features(struct virtio_device *vdev)
+{
+ struct virtio_pci_device *vp_dev = to_vp_device(vdev);
+
+ return vp_modern_get_features(&vp_dev->mdev);
+}
+
static void vp_transport_features(struct virtio_device *vdev, u64 features)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
@@ -163,12 +175,26 @@ static void vp_transport_features(struct virtio_device *vdev, u64 features)
__virtio_set_bit(vdev, VIRTIO_F_SR_IOV);
}
+/*
+ * vp_modern_set_features - set features to device
+ * @mdev: the modern virtio-pci device
+ * @features: the features set to device
+ */
+static void vp_modern_set_features(struct virtio_pci_modern_device *mdev,
+ u64 features)
+{
+ struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
+
+ vp_iowrite32(0, &cfg->guest_feature_select);
+ vp_iowrite32((u32)features, &cfg->guest_feature);
+ vp_iowrite32(1, &cfg->guest_feature_select);
+ vp_iowrite32(features >> 32, &cfg->guest_feature);
+}
+
/* virtio config->finalize_features() implementation */
static int vp_finalize_features(struct virtio_device *vdev)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
- struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
u64 features = vdev->features;
/* Give virtio_ring a chance to accept features. */
@@ -183,10 +209,7 @@ static int vp_finalize_features(struct virtio_device *vdev)
return -EINVAL;
}
- vp_iowrite32(0, &cfg->guest_feature_select);
- vp_iowrite32((u32)vdev->features, &cfg->guest_feature);
- vp_iowrite32(1, &cfg->guest_feature_select);
- vp_iowrite32(vdev->features >> 32, &cfg->guest_feature);
+ vp_modern_set_features(&vp_dev->mdev, vdev->features);
return 0;
}
--
2.25.1
next prev parent reply other threads:[~2020-12-04 4:06 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 4:03 [PATCH V2 00/19] vDPA driver for virtio-pci device Jason Wang
2020-12-04 4:03 ` [PATCH V2 01/19] virtio-pci: do not access iomem via struct virtio_pci_device directly Jason Wang
2020-12-04 4:03 ` [PATCH V2 02/19] virtio-pci: split out modern device Jason Wang
2020-12-04 4:03 ` [PATCH V2 03/19] virtio-pci-modern: factor out modern device initialization logic Jason Wang
2020-12-04 4:03 ` [PATCH V2 04/19] virtio-pci-modern: introduce vp_modern_remove() Jason Wang
2020-12-04 4:03 ` [PATCH V2 05/19] virtio-pci-modern: introduce helper to set config vector Jason Wang
2020-12-04 4:03 ` [PATCH V2 06/19] virtio-pci-modern: introduce helpers for setting and getting status Jason Wang
2020-12-04 4:03 ` Jason Wang [this message]
2020-12-04 4:03 ` [PATCH V2 08/19] virtio-pci-modern: introduce vp_modern_generation() Jason Wang
2020-12-04 4:03 ` [PATCH V2 09/19] virtio-pci-modern: introduce vp_modern_set_queue_vector() Jason Wang
2020-12-04 4:03 ` [PATCH V2 10/19] virtio-pci-modern: introduce vp_modern_queue_address() Jason Wang
2020-12-04 4:03 ` [PATCH V2 11/19] virtio-pci-modern: introduce helper to set/get queue_enable Jason Wang
2020-12-04 4:03 ` [PATCH V2 12/19] virtio-pci-modern: introduce helper for setting/geting queue size Jason Wang
2020-12-04 4:03 ` [PATCH V2 13/19] virtio-pci-modern: introduce helper for getting queue nums Jason Wang
2020-12-04 4:03 ` [PATCH V2 14/19] virtio-pci-modern: introduce helper to get notification offset Jason Wang
2020-12-04 4:03 ` [PATCH V2 15/19] virito-pci-modern: rename map_capability() to vp_modern_map_capability() Jason Wang
2020-12-04 4:03 ` [PATCH V2 16/19] virtio-pci: introduce modern device module Jason Wang
2020-12-04 17:10 ` Randy Dunlap
2021-01-04 3:22 ` Jason Wang
2020-12-04 4:03 ` [PATCH V2 17/19] vdpa: set the virtqueue num during register Jason Wang
2020-12-04 14:30 ` Stefano Garzarella
2020-12-04 4:03 ` [PATCH V2 18/19] virtio_vdpa: don't warn when fail to disable vq Jason Wang
2020-12-04 4:03 ` [PATCH V2 19/19] vdpa: introduce virtio pci driver Jason Wang
2020-12-04 15:20 ` Stefano Garzarella
2020-12-04 17:12 ` Randy Dunlap
2020-12-07 3:29 ` Jason Wang
2021-01-04 3:28 ` Jason Wang
2020-12-31 3:52 ` [PATCH V2 00/19] vDPA driver for virtio-pci device Jason Wang
2021-01-03 12:37 ` Michael S. Tsirkin
2021-01-04 6:58 ` Jason Wang
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