C++ (Cpp) vring_transport_features Examples

Example #1

File: zynq_rpmsg_driver.c Project: PetrLukas/open-amp

static void zynq_rpmsg_virtio_finalize_features(struct virtio_device *vdev)
{
	/* Set vring transport features. */
	vring_transport_features(vdev);

	zynq_rpmsg_p->gen_feature = vdev->features[0];
}

Example #2

File: lguest_device.c Project: AdrianHuang/linux-3.8.13

/*
 * The virtio core takes the features the Host offers, and copies the ones
 * supported by the driver into the vdev->features array.  Once that's all
 * sorted out, this routine is called so we can tell the Host which features we
 * understand and accept.
 */
static void lg_finalize_features(struct virtio_device *vdev)
{
	unsigned int i, bits;
	struct lguest_device_desc *desc = to_lgdev(vdev)->desc;
	/* Second half of bitmap is features we accept. */
	u8 *out_features = lg_features(desc) + desc->feature_len;

	/* Give virtio_ring a chance to accept features. */
	vring_transport_features(vdev);

	/*
	 * The vdev->feature array is a Linux bitmask: this isn't the same as a
	 * the simple array of bits used by lguest devices for features.  So we
	 * do this slow, manual conversion which is completely general.
	 */
	memset(out_features, 0, desc->feature_len);
	bits = min_t(unsigned, desc->feature_len, sizeof(vdev->features)) * 8;
	for (i = 0; i < bits; i++) {
		if (test_bit(i, vdev->features))
			out_features[i / 8] |= (1 << (i % 8));
	}

	/* Tell Host we've finished with this device's feature negotiation */
	status_notify(vdev);
}

Example #3

File: vop_main.c Project: Anjali05/linux

static int vop_finalize_features(struct virtio_device *vdev)
{
	unsigned int i, bits;
	struct mic_device_desc __iomem *desc = to_vopvdev(vdev)->desc;
	u8 feature_len = ioread8(&desc->feature_len);
	/* Second half of bitmap is features we accept. */
	u8 __iomem *out_features =
		_vop_vq_features(desc) + feature_len;

	/* Give virtio_ring a chance to accept features. */
	vring_transport_features(vdev);

	/* Give virtio_vop a chance to accept features. */
	vop_transport_features(vdev);

	memset_io(out_features, 0, feature_len);
	bits = min_t(unsigned, feature_len,
		     sizeof(vdev->features)) * 8;
	for (i = 0; i < bits; i++) {
		if (__virtio_test_bit(vdev, i))
			iowrite8(ioread8(&out_features[i / 8]) | (1 << (i % 8)),
				 &out_features[i / 8]);
	}
	return 0;
}

Example #4

File: virtio_mmio.c Project: ashang/xpenology-3.x

static void vm_finalize_features(struct virtio_device *vdev)
{
	struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
	int i;

	/* Give virtio_ring a chance to accept features. */
	vring_transport_features(vdev);

	for (i = 0; i < ARRAY_SIZE(vdev->features); i++) {
		writel(i, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES_SEL);
		writel(vdev->features[i],
				vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES);
	}
}

Example #5

File: virtio_pci_legacy.c Project: ReneNyffenegger/linux

/* virtio config->finalize_features() implementation */
static int vp_finalize_features(struct virtio_device *vdev)
{
	struct virtio_pci_device *vp_dev = to_vp_device(vdev);

	/* Give virtio_ring a chance to accept features. */
	vring_transport_features(vdev);

	/* Make sure we don't have any features > 32 bits! */
	BUG_ON((u32)vdev->features != vdev->features);

	/* We only support 32 feature bits. */
	iowrite32(vdev->features, vp_dev->ioaddr + VIRTIO_PCI_GUEST_FEATURES);

	return 0;
}

Example #6

File: kvm_virtio.c Project: johnny/CobraDroidBeta

static void kvm_finalize_features(struct virtio_device *vdev)
{
	unsigned int i, bits;
	struct kvm_device_desc *desc = to_kvmdev(vdev)->desc;
	/* Second half of bitmap is features we accept. */
	u8 *out_features = kvm_vq_features(desc) + desc->feature_len;

	/* Give virtio_ring a chance to accept features. */
	vring_transport_features(vdev);

	memset(out_features, 0, desc->feature_len);
	bits = min_t(unsigned, desc->feature_len, sizeof(vdev->features)) * 8;
	for (i = 0; i < bits; i++) {
		if (test_bit(i, vdev->features))
			out_features[i / 8] |= (1 << (i % 8));
	}
}

Example #7

File: imx_rpmsg.c Project: FEDEVEL/openrex-linux-3.14

static void imx_rpmsg_finalize_features(struct virtio_device *vdev)
{
	/* Give virtio_ring a chance to accept features */
	vring_transport_features(vdev);
}