Lines Matching +full:virtio +full:- +full:pci

1 /*-
27  * The Virtio 9P transport driver. This file contains all functions related to
49 #include <dev/virtio/virtio.h>
50 #include <dev/virtio/virtqueue.h>
51 #include <dev/virtio/virtio_ring.h>
52 #include <dev/virtio/p9fs/virtio_p9fs.h>
54 #define VT9P_MTX(_sc) (&(_sc)->vt9p_mtx)
58     "VIRTIO 9P CHAN lock", NULL, MTX_DEF)
87 /* We don't currently allow canceling of virtio requests */
113 	KASSERT(req->tc->tag != req->rc->tag,
125 	KASSERT(req->tc->tag == req->rc->tag,
148 	sg = chan->vt9p_sglist;
149 	vq = chan->vt9p_vq;
157 	/* Handle out VirtIO ring buffers */
158 	error = sglist_append(sg, req->tc->sdata, req->tc->size);
164 	readable = sg->sg_nseg;
166 	error = sglist_append(sg, req->rc->sdata, req->rc->capacity);
172 	writable = sg->sg_nseg - readable;
181 			cv_wait(&chan->submit_cv, VT9P_MTX(chan));
182 			P9_DEBUG(TRANS, "%s: retry virtio request\n", __func__);
185 			P9_DEBUG(ERROR, "%s: virtio enuqueue failed \n", __func__);
202 	P9_DEBUG(TRANS, "%s: virtio request kicked\n", __func__);
220 	vq = chan->vt9p_vq;
227 		curreq->rc->tag = curreq->tc->tag;
234 	cv_signal(&chan->submit_cv);
247 	dev = sc->vt9p_dev;
249 	VQ_ALLOC_INFO_INIT(&vq_info, sc->max_nsegs,
250 	    vt9p_intr_complete, sc, &sc->vt9p_vq,
256 /* Probe for existence of 9P virtio channels */
261 	/* If the virtio device type is a 9P device, then we claim and attach it */
264 	device_set_desc(dev, "VirtIO 9P Transport");
274 	virtqueue_disable_intr(sc->vt9p_vq);
275 	virtio_stop(sc->vt9p_dev);
278 /* Detach the 9P virtio PCI device */
289 	if (sc->vt9p_sglist) {
290 		sglist_free(sc->vt9p_sglist);
291 		sc->vt9p_sglist = NULL;
293 	if (sc->mount_tag) {
294 		free(sc->mount_tag, M_P9FS_MNTTAG);
295 		sc->mount_tag = NULL;
302 	cv_destroy(&sc->submit_cv);
307 /* Attach the 9P virtio PCI device */
319 	chan->vt9p_dev = dev;
324 	cv_init(&chan->submit_cv, "Conditional variable for submit queue" );
325 	chan->max_nsegs = MAX_SUPPORTED_SGS;
326 	chan->vt9p_sglist = sglist_alloc(chan->max_nsegs, M_WAITOK);
354 	chan->mount_tag_len = mount_tag_len;
355 	chan->mount_tag = mount_tag;
360 	    CTLFLAG_RD, chan->mount_tag, 0, "Mount tag");
373 	error = virtqueue_enable_intr(chan->vt9p_vq);
392  * Allocate a new virtio channel. This sets up a transport channel
408 		if (!strcmp(sc->mount_tag, mount_tag)) {
419 	if (chan && chan->busy) {
420 		//p9_debug(TRANS, "Channel busy: used by clnt=%p\n", chan->client);
427 		chan->busy = true;
442 	chan->busy = false;
446 	.name = "virtio",
493 MODULE_DEPEND(virtio_p9fs, virtio, 1, 1, 1);