104a9016eSOhad Ben-Cohen /* 204a9016eSOhad Ben-Cohen * Remote processor messaging transport (OMAP platform-specific bits) 304a9016eSOhad Ben-Cohen * 404a9016eSOhad Ben-Cohen * Copyright (C) 2011 Texas Instruments, Inc. 504a9016eSOhad Ben-Cohen * Copyright (C) 2011 Google, Inc. 604a9016eSOhad Ben-Cohen * 704a9016eSOhad Ben-Cohen * Ohad Ben-Cohen <ohad@wizery.com> 804a9016eSOhad Ben-Cohen * Brian Swetland <swetland@google.com> 904a9016eSOhad Ben-Cohen * 1004a9016eSOhad Ben-Cohen * This software is licensed under the terms of the GNU General Public 1104a9016eSOhad Ben-Cohen * License version 2, as published by the Free Software Foundation, and 1204a9016eSOhad Ben-Cohen * may be copied, distributed, and modified under those terms. 1304a9016eSOhad Ben-Cohen * 1404a9016eSOhad Ben-Cohen * This program is distributed in the hope that it will be useful, 1504a9016eSOhad Ben-Cohen * but WITHOUT ANY WARRANTY; without even the implied warranty of 1604a9016eSOhad Ben-Cohen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1704a9016eSOhad Ben-Cohen * GNU General Public License for more details. 1804a9016eSOhad Ben-Cohen */ 1904a9016eSOhad Ben-Cohen 2004a9016eSOhad Ben-Cohen #include <linux/export.h> 2104a9016eSOhad Ben-Cohen #include <linux/remoteproc.h> 2204a9016eSOhad Ben-Cohen #include <linux/virtio.h> 2304a9016eSOhad Ben-Cohen #include <linux/virtio_config.h> 2404a9016eSOhad Ben-Cohen #include <linux/virtio_ids.h> 2504a9016eSOhad Ben-Cohen #include <linux/virtio_ring.h> 2604a9016eSOhad Ben-Cohen #include <linux/err.h> 2704a9016eSOhad Ben-Cohen #include <linux/kref.h> 2804a9016eSOhad Ben-Cohen #include <linux/slab.h> 2904a9016eSOhad Ben-Cohen 3004a9016eSOhad Ben-Cohen #include "remoteproc_internal.h" 3104a9016eSOhad Ben-Cohen 3204a9016eSOhad Ben-Cohen /* kick the remote processor, and let it know which virtqueue to poke at */ 3346f9c2b9SHeinz Graalfs static bool rproc_virtio_notify(struct virtqueue *vq) 3404a9016eSOhad Ben-Cohen { 357a186941SOhad Ben-Cohen struct rproc_vring *rvring = vq->priv; 367a186941SOhad Ben-Cohen struct rproc *rproc = rvring->rvdev->rproc; 377a186941SOhad Ben-Cohen int notifyid = rvring->notifyid; 3804a9016eSOhad Ben-Cohen 39b5ab5e24SOhad Ben-Cohen dev_dbg(&rproc->dev, "kicking vq index: %d\n", notifyid); 4004a9016eSOhad Ben-Cohen 417a186941SOhad Ben-Cohen rproc->ops->kick(rproc, notifyid); 4246f9c2b9SHeinz Graalfs return true; 4304a9016eSOhad Ben-Cohen } 4404a9016eSOhad Ben-Cohen 4504a9016eSOhad Ben-Cohen /** 4604a9016eSOhad Ben-Cohen * rproc_vq_interrupt() - tell remoteproc that a virtqueue is interrupted 4704a9016eSOhad Ben-Cohen * @rproc: handle to the remote processor 487a186941SOhad Ben-Cohen * @notifyid: index of the signalled virtqueue (unique per this @rproc) 4904a9016eSOhad Ben-Cohen * 5004a9016eSOhad Ben-Cohen * This function should be called by the platform-specific rproc driver, 5104a9016eSOhad Ben-Cohen * when the remote processor signals that a specific virtqueue has pending 5204a9016eSOhad Ben-Cohen * messages available. 5304a9016eSOhad Ben-Cohen * 547a186941SOhad Ben-Cohen * Returns IRQ_NONE if no message was found in the @notifyid virtqueue, 5504a9016eSOhad Ben-Cohen * and otherwise returns IRQ_HANDLED. 5604a9016eSOhad Ben-Cohen */ 577a186941SOhad Ben-Cohen irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int notifyid) 5804a9016eSOhad Ben-Cohen { 597a186941SOhad Ben-Cohen struct rproc_vring *rvring; 607a186941SOhad Ben-Cohen 61b5ab5e24SOhad Ben-Cohen dev_dbg(&rproc->dev, "vq index %d is interrupted\n", notifyid); 627a186941SOhad Ben-Cohen 637a186941SOhad Ben-Cohen rvring = idr_find(&rproc->notifyids, notifyid); 647a186941SOhad Ben-Cohen if (!rvring || !rvring->vq) 657a186941SOhad Ben-Cohen return IRQ_NONE; 667a186941SOhad Ben-Cohen 677a186941SOhad Ben-Cohen return vring_interrupt(0, rvring->vq); 6804a9016eSOhad Ben-Cohen } 6904a9016eSOhad Ben-Cohen EXPORT_SYMBOL(rproc_vq_interrupt); 7004a9016eSOhad Ben-Cohen 7104a9016eSOhad Ben-Cohen static struct virtqueue *rp_find_vq(struct virtio_device *vdev, 72f145928dSAnna, Suman unsigned int id, 7304a9016eSOhad Ben-Cohen void (*callback)(struct virtqueue *vq), 7404a9016eSOhad Ben-Cohen const char *name) 7504a9016eSOhad Ben-Cohen { 767a186941SOhad Ben-Cohen struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 7704a9016eSOhad Ben-Cohen struct rproc *rproc = vdev_to_rproc(vdev); 78b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 797a186941SOhad Ben-Cohen struct rproc_vring *rvring; 8004a9016eSOhad Ben-Cohen struct virtqueue *vq; 8104a9016eSOhad Ben-Cohen void *addr; 826db20ea8SOhad Ben-Cohen int len, size, ret; 8304a9016eSOhad Ben-Cohen 847a186941SOhad Ben-Cohen /* we're temporarily limited to two virtqueues per rvdev */ 857a186941SOhad Ben-Cohen if (id >= ARRAY_SIZE(rvdev->vring)) 867a186941SOhad Ben-Cohen return ERR_PTR(-EINVAL); 8704a9016eSOhad Ben-Cohen 886457f126SMichael S. Tsirkin if (!name) 896457f126SMichael S. Tsirkin return NULL; 906457f126SMichael S. Tsirkin 916db20ea8SOhad Ben-Cohen ret = rproc_alloc_vring(rvdev, id); 926db20ea8SOhad Ben-Cohen if (ret) 936db20ea8SOhad Ben-Cohen return ERR_PTR(ret); 9404a9016eSOhad Ben-Cohen 956db20ea8SOhad Ben-Cohen rvring = &rvdev->vring[id]; 967a186941SOhad Ben-Cohen addr = rvring->va; 977a186941SOhad Ben-Cohen len = rvring->len; 9804a9016eSOhad Ben-Cohen 997a186941SOhad Ben-Cohen /* zero vring */ 1007a186941SOhad Ben-Cohen size = vring_size(len, rvring->align); 1017a186941SOhad Ben-Cohen memset(addr, 0, size); 1027a186941SOhad Ben-Cohen 103b5ab5e24SOhad Ben-Cohen dev_dbg(dev, "vring%d: va %p qsz %d notifyid %d\n", 1047a186941SOhad Ben-Cohen id, addr, len, rvring->notifyid); 10504a9016eSOhad Ben-Cohen 10604a9016eSOhad Ben-Cohen /* 10704a9016eSOhad Ben-Cohen * Create the new vq, and tell virtio we're not interested in 10804a9016eSOhad Ben-Cohen * the 'weak' smp barriers, since we're talking with a real device. 10904a9016eSOhad Ben-Cohen */ 11017bb6d40SJason Wang vq = vring_new_virtqueue(id, len, rvring->align, vdev, false, addr, 11104a9016eSOhad Ben-Cohen rproc_virtio_notify, callback, name); 11204a9016eSOhad Ben-Cohen if (!vq) { 113b5ab5e24SOhad Ben-Cohen dev_err(dev, "vring_new_virtqueue %s failed\n", name); 1146db20ea8SOhad Ben-Cohen rproc_free_vring(rvring); 1157a186941SOhad Ben-Cohen return ERR_PTR(-ENOMEM); 11604a9016eSOhad Ben-Cohen } 11704a9016eSOhad Ben-Cohen 1187a186941SOhad Ben-Cohen rvring->vq = vq; 1197a186941SOhad Ben-Cohen vq->priv = rvring; 12004a9016eSOhad Ben-Cohen 12104a9016eSOhad Ben-Cohen return vq; 12204a9016eSOhad Ben-Cohen } 12304a9016eSOhad Ben-Cohen 124dab55bbaSOhad Ben-Cohen static void __rproc_virtio_del_vqs(struct virtio_device *vdev) 12504a9016eSOhad Ben-Cohen { 12604a9016eSOhad Ben-Cohen struct virtqueue *vq, *n; 1277a186941SOhad Ben-Cohen struct rproc_vring *rvring; 12804a9016eSOhad Ben-Cohen 12904a9016eSOhad Ben-Cohen list_for_each_entry_safe(vq, n, &vdev->vqs, list) { 1307a186941SOhad Ben-Cohen rvring = vq->priv; 1317a186941SOhad Ben-Cohen rvring->vq = NULL; 13204a9016eSOhad Ben-Cohen vring_del_virtqueue(vq); 1336db20ea8SOhad Ben-Cohen rproc_free_vring(rvring); 13404a9016eSOhad Ben-Cohen } 13504a9016eSOhad Ben-Cohen } 13604a9016eSOhad Ben-Cohen 137dab55bbaSOhad Ben-Cohen static void rproc_virtio_del_vqs(struct virtio_device *vdev) 138dab55bbaSOhad Ben-Cohen { 139dab55bbaSOhad Ben-Cohen __rproc_virtio_del_vqs(vdev); 140dab55bbaSOhad Ben-Cohen } 141dab55bbaSOhad Ben-Cohen 142f145928dSAnna, Suman static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs, 14304a9016eSOhad Ben-Cohen struct virtqueue *vqs[], 14404a9016eSOhad Ben-Cohen vq_callback_t *callbacks[], 145f7ad26ffSStefan Hajnoczi const char * const names[]) 14604a9016eSOhad Ben-Cohen { 14704a9016eSOhad Ben-Cohen int i, ret; 14804a9016eSOhad Ben-Cohen 14904a9016eSOhad Ben-Cohen for (i = 0; i < nvqs; ++i) { 15004a9016eSOhad Ben-Cohen vqs[i] = rp_find_vq(vdev, i, callbacks[i], names[i]); 15104a9016eSOhad Ben-Cohen if (IS_ERR(vqs[i])) { 15204a9016eSOhad Ben-Cohen ret = PTR_ERR(vqs[i]); 15304a9016eSOhad Ben-Cohen goto error; 15404a9016eSOhad Ben-Cohen } 15504a9016eSOhad Ben-Cohen } 15604a9016eSOhad Ben-Cohen 15704a9016eSOhad Ben-Cohen return 0; 15804a9016eSOhad Ben-Cohen 15904a9016eSOhad Ben-Cohen error: 160dab55bbaSOhad Ben-Cohen __rproc_virtio_del_vqs(vdev); 16104a9016eSOhad Ben-Cohen return ret; 16204a9016eSOhad Ben-Cohen } 16304a9016eSOhad Ben-Cohen 16404a9016eSOhad Ben-Cohen static u8 rproc_virtio_get_status(struct virtio_device *vdev) 16504a9016eSOhad Ben-Cohen { 16692b38f85SSjur Brændeland struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 16792b38f85SSjur Brændeland struct fw_rsc_vdev *rsc; 16892b38f85SSjur Brændeland 16992b38f85SSjur Brændeland rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset; 17092b38f85SSjur Brændeland 17192b38f85SSjur Brændeland return rsc->status; 17204a9016eSOhad Ben-Cohen } 17304a9016eSOhad Ben-Cohen 17404a9016eSOhad Ben-Cohen static void rproc_virtio_set_status(struct virtio_device *vdev, u8 status) 17504a9016eSOhad Ben-Cohen { 17692b38f85SSjur Brændeland struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 17792b38f85SSjur Brændeland struct fw_rsc_vdev *rsc; 17892b38f85SSjur Brændeland 17992b38f85SSjur Brændeland rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset; 18092b38f85SSjur Brændeland 18192b38f85SSjur Brændeland rsc->status = status; 1827a186941SOhad Ben-Cohen dev_dbg(&vdev->dev, "status: %d\n", status); 18304a9016eSOhad Ben-Cohen } 18404a9016eSOhad Ben-Cohen 18504a9016eSOhad Ben-Cohen static void rproc_virtio_reset(struct virtio_device *vdev) 18604a9016eSOhad Ben-Cohen { 18792b38f85SSjur Brændeland struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 18892b38f85SSjur Brændeland struct fw_rsc_vdev *rsc; 18992b38f85SSjur Brændeland 19092b38f85SSjur Brændeland rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset; 19192b38f85SSjur Brændeland 19292b38f85SSjur Brændeland rsc->status = 0; 19304a9016eSOhad Ben-Cohen dev_dbg(&vdev->dev, "reset !\n"); 19404a9016eSOhad Ben-Cohen } 19504a9016eSOhad Ben-Cohen 19604a9016eSOhad Ben-Cohen /* provide the vdev features as retrieved from the firmware */ 197d0254773SMichael S. Tsirkin static u64 rproc_virtio_get_features(struct virtio_device *vdev) 19804a9016eSOhad Ben-Cohen { 1997a186941SOhad Ben-Cohen struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 20092b38f85SSjur Brændeland struct fw_rsc_vdev *rsc; 20104a9016eSOhad Ben-Cohen 20292b38f85SSjur Brændeland rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset; 20392b38f85SSjur Brændeland 20492b38f85SSjur Brændeland return rsc->dfeatures; 20504a9016eSOhad Ben-Cohen } 20604a9016eSOhad Ben-Cohen 2075c609a5eSMichael S. Tsirkin static int rproc_virtio_finalize_features(struct virtio_device *vdev) 20804a9016eSOhad Ben-Cohen { 2097a186941SOhad Ben-Cohen struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 21092b38f85SSjur Brændeland struct fw_rsc_vdev *rsc; 21192b38f85SSjur Brændeland 21292b38f85SSjur Brændeland rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset; 21304a9016eSOhad Ben-Cohen 21404a9016eSOhad Ben-Cohen /* Give virtio_ring a chance to accept features */ 21504a9016eSOhad Ben-Cohen vring_transport_features(vdev); 21604a9016eSOhad Ben-Cohen 21793d389f8SMichael S. Tsirkin /* Make sure we don't have any features > 32 bits! */ 21893d389f8SMichael S. Tsirkin BUG_ON((u32)vdev->features != vdev->features); 21993d389f8SMichael S. Tsirkin 22004a9016eSOhad Ben-Cohen /* 22104a9016eSOhad Ben-Cohen * Remember the finalized features of our vdev, and provide it 22204a9016eSOhad Ben-Cohen * to the remote processor once it is powered on. 22304a9016eSOhad Ben-Cohen */ 224e16e12beSMichael S. Tsirkin rsc->gfeatures = vdev->features; 2255c609a5eSMichael S. Tsirkin 2265c609a5eSMichael S. Tsirkin return 0; 22792b38f85SSjur Brændeland } 22892b38f85SSjur Brændeland 229f145928dSAnna, Suman static void rproc_virtio_get(struct virtio_device *vdev, unsigned int offset, 230f145928dSAnna, Suman void *buf, unsigned int len) 23192b38f85SSjur Brændeland { 23292b38f85SSjur Brændeland struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 23392b38f85SSjur Brændeland struct fw_rsc_vdev *rsc; 23492b38f85SSjur Brændeland void *cfg; 23592b38f85SSjur Brændeland 23692b38f85SSjur Brændeland rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset; 23792b38f85SSjur Brændeland cfg = &rsc->vring[rsc->num_of_vrings]; 23892b38f85SSjur Brændeland 23992b38f85SSjur Brændeland if (offset + len > rsc->config_len || offset + len < len) { 24092b38f85SSjur Brændeland dev_err(&vdev->dev, "rproc_virtio_get: access out of bounds\n"); 24192b38f85SSjur Brændeland return; 24292b38f85SSjur Brændeland } 24392b38f85SSjur Brændeland 24492b38f85SSjur Brændeland memcpy(buf, cfg + offset, len); 24592b38f85SSjur Brændeland } 24692b38f85SSjur Brændeland 247f145928dSAnna, Suman static void rproc_virtio_set(struct virtio_device *vdev, unsigned int offset, 248f145928dSAnna, Suman const void *buf, unsigned int len) 24992b38f85SSjur Brændeland { 25092b38f85SSjur Brændeland struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 25192b38f85SSjur Brændeland struct fw_rsc_vdev *rsc; 25292b38f85SSjur Brændeland void *cfg; 25392b38f85SSjur Brændeland 25492b38f85SSjur Brændeland rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset; 25592b38f85SSjur Brændeland cfg = &rsc->vring[rsc->num_of_vrings]; 25692b38f85SSjur Brændeland 25792b38f85SSjur Brændeland if (offset + len > rsc->config_len || offset + len < len) { 25892b38f85SSjur Brændeland dev_err(&vdev->dev, "rproc_virtio_set: access out of bounds\n"); 25992b38f85SSjur Brændeland return; 26092b38f85SSjur Brændeland } 26192b38f85SSjur Brændeland 26292b38f85SSjur Brændeland memcpy(cfg + offset, buf, len); 26304a9016eSOhad Ben-Cohen } 26404a9016eSOhad Ben-Cohen 26593503932SStephen Hemminger static const struct virtio_config_ops rproc_virtio_config_ops = { 26604a9016eSOhad Ben-Cohen .get_features = rproc_virtio_get_features, 26704a9016eSOhad Ben-Cohen .finalize_features = rproc_virtio_finalize_features, 26804a9016eSOhad Ben-Cohen .find_vqs = rproc_virtio_find_vqs, 26904a9016eSOhad Ben-Cohen .del_vqs = rproc_virtio_del_vqs, 27004a9016eSOhad Ben-Cohen .reset = rproc_virtio_reset, 27104a9016eSOhad Ben-Cohen .set_status = rproc_virtio_set_status, 27204a9016eSOhad Ben-Cohen .get_status = rproc_virtio_get_status, 27392b38f85SSjur Brændeland .get = rproc_virtio_get, 27492b38f85SSjur Brændeland .set = rproc_virtio_set, 27504a9016eSOhad Ben-Cohen }; 27604a9016eSOhad Ben-Cohen 27704a9016eSOhad Ben-Cohen /* 27804a9016eSOhad Ben-Cohen * This function is called whenever vdev is released, and is responsible 2797183a2a7SOhad Ben-Cohen * to decrement the remote processor's refcount which was taken when vdev was 28004a9016eSOhad Ben-Cohen * added. 28104a9016eSOhad Ben-Cohen * 28204a9016eSOhad Ben-Cohen * Never call this function directly; it will be called by the driver 28304a9016eSOhad Ben-Cohen * core when needed. 28404a9016eSOhad Ben-Cohen */ 285aab8d802SBjorn Andersson static void rproc_virtio_dev_release(struct device *dev) 28604a9016eSOhad Ben-Cohen { 28704a9016eSOhad Ben-Cohen struct virtio_device *vdev = dev_to_virtio(dev); 2886db20ea8SOhad Ben-Cohen struct rproc_vdev *rvdev = vdev_to_rvdev(vdev); 28904a9016eSOhad Ben-Cohen struct rproc *rproc = vdev_to_rproc(vdev); 29004a9016eSOhad Ben-Cohen 291aab8d802SBjorn Andersson kref_put(&rvdev->refcount, rproc_vdev_release); 2926db20ea8SOhad Ben-Cohen 2937183a2a7SOhad Ben-Cohen put_device(&rproc->dev); 29404a9016eSOhad Ben-Cohen } 29504a9016eSOhad Ben-Cohen 29604a9016eSOhad Ben-Cohen /** 2977a186941SOhad Ben-Cohen * rproc_add_virtio_dev() - register an rproc-induced virtio device 2987a186941SOhad Ben-Cohen * @rvdev: the remote vdev 29904a9016eSOhad Ben-Cohen * 3007a186941SOhad Ben-Cohen * This function registers a virtio device. This vdev's partent is 3017a186941SOhad Ben-Cohen * the rproc device. 30204a9016eSOhad Ben-Cohen * 3037a186941SOhad Ben-Cohen * Returns 0 on success or an appropriate error value otherwise. 30404a9016eSOhad Ben-Cohen */ 3057a186941SOhad Ben-Cohen int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id) 30604a9016eSOhad Ben-Cohen { 3077a186941SOhad Ben-Cohen struct rproc *rproc = rvdev->rproc; 308b5ab5e24SOhad Ben-Cohen struct device *dev = &rproc->dev; 3097a186941SOhad Ben-Cohen struct virtio_device *vdev = &rvdev->vdev; 31004a9016eSOhad Ben-Cohen int ret; 31104a9016eSOhad Ben-Cohen 3127a186941SOhad Ben-Cohen vdev->id.device = id, 3137a186941SOhad Ben-Cohen vdev->config = &rproc_virtio_config_ops, 3147a186941SOhad Ben-Cohen vdev->dev.parent = dev; 315aab8d802SBjorn Andersson vdev->dev.release = rproc_virtio_dev_release; 31604a9016eSOhad Ben-Cohen 31704a9016eSOhad Ben-Cohen /* 31804a9016eSOhad Ben-Cohen * We're indirectly making a non-temporary copy of the rproc pointer 31904a9016eSOhad Ben-Cohen * here, because drivers probed with this vdev will indirectly 32004a9016eSOhad Ben-Cohen * access the wrapping rproc. 32104a9016eSOhad Ben-Cohen * 32204a9016eSOhad Ben-Cohen * Therefore we must increment the rproc refcount here, and decrement 32304a9016eSOhad Ben-Cohen * it _only_ when the vdev is released. 32404a9016eSOhad Ben-Cohen */ 3257183a2a7SOhad Ben-Cohen get_device(&rproc->dev); 32604a9016eSOhad Ben-Cohen 327aab8d802SBjorn Andersson /* Reference the vdev and vring allocations */ 328aab8d802SBjorn Andersson kref_get(&rvdev->refcount); 329aab8d802SBjorn Andersson 3307a186941SOhad Ben-Cohen ret = register_virtio_device(vdev); 33104a9016eSOhad Ben-Cohen if (ret) { 3327183a2a7SOhad Ben-Cohen put_device(&rproc->dev); 33304a9016eSOhad Ben-Cohen dev_err(dev, "failed to register vdev: %d\n", ret); 3347a186941SOhad Ben-Cohen goto out; 33504a9016eSOhad Ben-Cohen } 33604a9016eSOhad Ben-Cohen 3377a186941SOhad Ben-Cohen dev_info(dev, "registered %s (type %d)\n", dev_name(&vdev->dev), id); 3387a186941SOhad Ben-Cohen 3397a186941SOhad Ben-Cohen out: 34004a9016eSOhad Ben-Cohen return ret; 34104a9016eSOhad Ben-Cohen } 34204a9016eSOhad Ben-Cohen 34304a9016eSOhad Ben-Cohen /** 3447a186941SOhad Ben-Cohen * rproc_remove_virtio_dev() - remove an rproc-induced virtio device 3457a186941SOhad Ben-Cohen * @rvdev: the remote vdev 34604a9016eSOhad Ben-Cohen * 3477a186941SOhad Ben-Cohen * This function unregisters an existing virtio device. 34804a9016eSOhad Ben-Cohen */ 3497a186941SOhad Ben-Cohen void rproc_remove_virtio_dev(struct rproc_vdev *rvdev) 35004a9016eSOhad Ben-Cohen { 35104a9016eSOhad Ben-Cohen unregister_virtio_device(&rvdev->vdev); 35204a9016eSOhad Ben-Cohen } 353