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Make virtio queue re-initialization steps to be similar to

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original initialization, so we don't miss few registers to
configure.

This fixes vtnet(4) operation with QEMU's virtio-net-device.

Tested in QEMU with FreeBSD/RISC-V.

Reviewed by:	bryanv
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D15821
This commit is contained in:
Ruslan Bukin 2018-06-15 16:19:10 +00:00
parent d87ef77d0f
commit 1147facec3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=335211
1 changed files with 14 additions and 3 deletions
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17
sys/dev/virtio/mmio/virtio_mmio.c
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@ -512,7 +512,8 @@ vtmmio_alloc_virtqueues(device_t dev, int flags, int nvqs,
if (sc->vtmmio_vqs == NULL)
return (ENOMEM);
vtmmio_write_config_4(sc, VIRTIO_MMIO_GUEST_PAGE_SIZE, 1 << PAGE_SHIFT);
vtmmio_write_config_4(sc, VIRTIO_MMIO_GUEST_PAGE_SIZE,
(1 << PAGE_SHIFT));
for (idx = 0; idx < nvqs; idx++) {
vqx = &sc->vtmmio_vqs[idx];
@ -537,10 +538,10 @@ vtmmio_alloc_virtqueues(device_t dev, int flags, int nvqs,
VIRTIO_MMIO_VRING_ALIGN);
#if 0
device_printf(dev, "virtqueue paddr 0x%08lx\n",
(uint64_t)virtqueue_paddr(vq));
(uint64_t)virtqueue_paddr(vq));
#endif
vtmmio_write_config_4(sc, VIRTIO_MMIO_QUEUE_PFN,
virtqueue_paddr(vq) >> PAGE_SHIFT);
virtqueue_paddr(vq) >> PAGE_SHIFT);
vqx->vtv_vq = *info->vqai_vq = vq;
vqx->vtv_no_intr = info->vqai_intr == NULL;
@ -592,6 +593,9 @@ vtmmio_reinit(device_t dev, uint64_t features)
vtmmio_negotiate_features(dev, features);
vtmmio_write_config_4(sc, VIRTIO_MMIO_GUEST_PAGE_SIZE,
(1 << PAGE_SHIFT));
for (idx = 0; idx < sc->vtmmio_nvqs; idx++) {
error = vtmmio_reinit_virtqueue(sc, idx);
if (error)
@ -766,6 +770,13 @@ vtmmio_reinit_virtqueue(struct vtmmio_softc *sc, int idx)
if (error)
return (error);
vtmmio_write_config_4(sc, VIRTIO_MMIO_QUEUE_NUM, size);
vtmmio_write_config_4(sc, VIRTIO_MMIO_QUEUE_ALIGN,
VIRTIO_MMIO_VRING_ALIGN);
#if 0
device_printf(sc->dev, "virtqueue paddr 0x%08lx\n",
(uint64_t)virtqueue_paddr(vq));
#endif
vtmmio_write_config_4(sc, VIRTIO_MMIO_QUEUE_PFN,
virtqueue_paddr(vq) >> PAGE_SHIFT);