diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/misc/mic/vop/vop_main.c | 766 |
1 files changed, 766 insertions, 0 deletions
diff --git a/drivers/misc/mic/vop/vop_main.c b/drivers/misc/mic/vop/vop_main.c new file mode 100644 index 000000000..f4332a97c --- /dev/null +++ b/drivers/misc/mic/vop/vop_main.c @@ -0,0 +1,766 @@ +/* + * Intel MIC Platform Software Stack (MPSS) + * + * Copyright(c) 2016 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Adapted from: + * + * virtio for kvm on s390 + * + * Copyright IBM Corp. 2008 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License (version 2 only) + * as published by the Free Software Foundation. + * + * Author(s): Christian Borntraeger <borntraeger@de.ibm.com> + * + * Intel Virtio Over PCIe (VOP) driver. + * + */ +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/dma-mapping.h> + +#include "vop_main.h" + +#define VOP_MAX_VRINGS 4 + +/* + * _vop_vdev - Allocated per virtio device instance injected by the peer. + * + * @vdev: Virtio device + * @desc: Virtio device page descriptor + * @dc: Virtio device control + * @vpdev: VOP device which is the parent for this virtio device + * @vr: Buffer for accessing the VRING + * @used: Buffer for used + * @used_size: Size of the used buffer + * @reset_done: Track whether VOP reset is complete + * @virtio_cookie: Cookie returned upon requesting a interrupt + * @c2h_vdev_db: The doorbell used by the guest to interrupt the host + * @h2c_vdev_db: The doorbell used by the host to interrupt the guest + * @dnode: The destination node + */ +struct _vop_vdev { + struct virtio_device vdev; + struct mic_device_desc __iomem *desc; + struct mic_device_ctrl __iomem *dc; + struct vop_device *vpdev; + void __iomem *vr[VOP_MAX_VRINGS]; + dma_addr_t used[VOP_MAX_VRINGS]; + int used_size[VOP_MAX_VRINGS]; + struct completion reset_done; + struct mic_irq *virtio_cookie; + int c2h_vdev_db; + int h2c_vdev_db; + int dnode; +}; + +#define to_vopvdev(vd) container_of(vd, struct _vop_vdev, vdev) + +#define _vop_aligned_desc_size(d) __mic_align(_vop_desc_size(d), 8) + +/* Helper API to obtain the parent of the virtio device */ +static inline struct device *_vop_dev(struct _vop_vdev *vdev) +{ + return vdev->vdev.dev.parent; +} + +static inline unsigned _vop_desc_size(struct mic_device_desc __iomem *desc) +{ + return sizeof(*desc) + + ioread8(&desc->num_vq) * sizeof(struct mic_vqconfig) + + ioread8(&desc->feature_len) * 2 + + ioread8(&desc->config_len); +} + +static inline struct mic_vqconfig __iomem * +_vop_vq_config(struct mic_device_desc __iomem *desc) +{ + return (struct mic_vqconfig __iomem *)(desc + 1); +} + +static inline u8 __iomem * +_vop_vq_features(struct mic_device_desc __iomem *desc) +{ + return (u8 __iomem *)(_vop_vq_config(desc) + ioread8(&desc->num_vq)); +} + +static inline u8 __iomem * +_vop_vq_configspace(struct mic_device_desc __iomem *desc) +{ + return _vop_vq_features(desc) + ioread8(&desc->feature_len) * 2; +} + +static inline unsigned +_vop_total_desc_size(struct mic_device_desc __iomem *desc) +{ + return _vop_aligned_desc_size(desc) + sizeof(struct mic_device_ctrl); +} + +/* This gets the device's feature bits. */ +static u64 vop_get_features(struct virtio_device *vdev) +{ + unsigned int i, bits; + u32 features = 0; + struct mic_device_desc __iomem *desc = to_vopvdev(vdev)->desc; + u8 __iomem *in_features = _vop_vq_features(desc); + int feature_len = ioread8(&desc->feature_len); + + bits = min_t(unsigned, feature_len, sizeof(vdev->features)) * 8; + for (i = 0; i < bits; i++) + if (ioread8(&in_features[i / 8]) & (BIT(i % 8))) + features |= BIT(i); + + return features; +} + +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); + + 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; +} + +/* + * Reading and writing elements in config space + */ +static void vop_get(struct virtio_device *vdev, unsigned int offset, + void *buf, unsigned len) +{ + struct mic_device_desc __iomem *desc = to_vopvdev(vdev)->desc; + + if (offset + len > ioread8(&desc->config_len)) + return; + memcpy_fromio(buf, _vop_vq_configspace(desc) + offset, len); +} + +static void vop_set(struct virtio_device *vdev, unsigned int offset, + const void *buf, unsigned len) +{ + struct mic_device_desc __iomem *desc = to_vopvdev(vdev)->desc; + + if (offset + len > ioread8(&desc->config_len)) + return; + memcpy_toio(_vop_vq_configspace(desc) + offset, buf, len); +} + +/* + * The operations to get and set the status word just access the status + * field of the device descriptor. set_status also interrupts the host + * to tell about status changes. + */ +static u8 vop_get_status(struct virtio_device *vdev) +{ + return ioread8(&to_vopvdev(vdev)->desc->status); +} + +static void vop_set_status(struct virtio_device *dev, u8 status) +{ + struct _vop_vdev *vdev = to_vopvdev(dev); + struct vop_device *vpdev = vdev->vpdev; + + if (!status) + return; + iowrite8(status, &vdev->desc->status); + vpdev->hw_ops->send_intr(vpdev, vdev->c2h_vdev_db); +} + +/* Inform host on a virtio device reset and wait for ack from host */ +static void vop_reset_inform_host(struct virtio_device *dev) +{ + struct _vop_vdev *vdev = to_vopvdev(dev); + struct mic_device_ctrl __iomem *dc = vdev->dc; + struct vop_device *vpdev = vdev->vpdev; + int retry; + + iowrite8(0, &dc->host_ack); + iowrite8(1, &dc->vdev_reset); + vpdev->hw_ops->send_intr(vpdev, vdev->c2h_vdev_db); + + /* Wait till host completes all card accesses and acks the reset */ + for (retry = 100; retry--;) { + if (ioread8(&dc->host_ack)) + break; + msleep(100); + }; + + dev_dbg(_vop_dev(vdev), "%s: retry: %d\n", __func__, retry); + + /* Reset status to 0 in case we timed out */ + iowrite8(0, &vdev->desc->status); +} + +static void vop_reset(struct virtio_device *dev) +{ + struct _vop_vdev *vdev = to_vopvdev(dev); + + dev_dbg(_vop_dev(vdev), "%s: virtio id %d\n", + __func__, dev->id.device); + + vop_reset_inform_host(dev); + complete_all(&vdev->reset_done); +} + +/* + * The virtio_ring code calls this API when it wants to notify the Host. + */ +static bool vop_notify(struct virtqueue *vq) +{ + struct _vop_vdev *vdev = vq->priv; + struct vop_device *vpdev = vdev->vpdev; + + vpdev->hw_ops->send_intr(vpdev, vdev->c2h_vdev_db); + return true; +} + +static void vop_del_vq(struct virtqueue *vq, int n) +{ + struct _vop_vdev *vdev = to_vopvdev(vq->vdev); + struct vring *vr = (struct vring *)(vq + 1); + struct vop_device *vpdev = vdev->vpdev; + + dma_unmap_single(&vpdev->dev, vdev->used[n], + vdev->used_size[n], DMA_BIDIRECTIONAL); + free_pages((unsigned long)vr->used, get_order(vdev->used_size[n])); + vring_del_virtqueue(vq); + vpdev->hw_ops->iounmap(vpdev, vdev->vr[n]); + vdev->vr[n] = NULL; +} + +static void vop_del_vqs(struct virtio_device *dev) +{ + struct _vop_vdev *vdev = to_vopvdev(dev); + struct virtqueue *vq, *n; + int idx = 0; + + dev_dbg(_vop_dev(vdev), "%s\n", __func__); + + list_for_each_entry_safe(vq, n, &dev->vqs, list) + vop_del_vq(vq, idx++); +} + +/* + * This routine will assign vring's allocated in host/io memory. Code in + * virtio_ring.c however continues to access this io memory as if it were local + * memory without io accessors. + */ +static struct virtqueue *vop_find_vq(struct virtio_device *dev, + unsigned index, + void (*callback)(struct virtqueue *vq), + const char *name, bool ctx) +{ + struct _vop_vdev *vdev = to_vopvdev(dev); + struct vop_device *vpdev = vdev->vpdev; + struct mic_vqconfig __iomem *vqconfig; + struct mic_vqconfig config; + struct virtqueue *vq; + void __iomem *va; + struct _mic_vring_info __iomem *info; + void *used; + int vr_size, _vr_size, err, magic; + struct vring *vr; + u8 type = ioread8(&vdev->desc->type); + + if (index >= ioread8(&vdev->desc->num_vq)) + return ERR_PTR(-ENOENT); + + if (!name) + return ERR_PTR(-ENOENT); + + /* First assign the vring's allocated in host memory */ + vqconfig = _vop_vq_config(vdev->desc) + index; + memcpy_fromio(&config, vqconfig, sizeof(config)); + _vr_size = round_up(vring_size(le16_to_cpu(config.num), MIC_VIRTIO_RING_ALIGN), 4); + vr_size = PAGE_ALIGN(_vr_size + sizeof(struct _mic_vring_info)); + va = vpdev->hw_ops->ioremap(vpdev, le64_to_cpu(config.address), + vr_size); + if (!va) + return ERR_PTR(-ENOMEM); + vdev->vr[index] = va; + memset_io(va, 0x0, _vr_size); + vq = vring_new_virtqueue( + index, + le16_to_cpu(config.num), MIC_VIRTIO_RING_ALIGN, + dev, + false, + ctx, + (void __force *)va, vop_notify, callback, name); + if (!vq) { + err = -ENOMEM; + goto unmap; + } + info = va + _vr_size; + magic = ioread32(&info->magic); + + if (WARN(magic != MIC_MAGIC + type + index, "magic mismatch")) { + err = -EIO; + goto unmap; + } + + /* Allocate and reassign used ring now */ + vdev->used_size[index] = PAGE_ALIGN(sizeof(__u16) * 3 + + sizeof(struct vring_used_elem) * + le16_to_cpu(config.num)); + used = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, + get_order(vdev->used_size[index])); + if (!used) { + err = -ENOMEM; + dev_err(_vop_dev(vdev), "%s %d err %d\n", + __func__, __LINE__, err); + goto del_vq; + } + vdev->used[index] = dma_map_single(&vpdev->dev, used, + vdev->used_size[index], + DMA_BIDIRECTIONAL); + if (dma_mapping_error(&vpdev->dev, vdev->used[index])) { + err = -ENOMEM; + dev_err(_vop_dev(vdev), "%s %d err %d\n", + __func__, __LINE__, err); + goto free_used; + } + writeq(vdev->used[index], &vqconfig->used_address); + /* + * To reassign the used ring here we are directly accessing + * struct vring_virtqueue which is a private data structure + * in virtio_ring.c. At the minimum, a BUILD_BUG_ON() in + * vring_new_virtqueue() would ensure that + * (&vq->vring == (struct vring *) (&vq->vq + 1)); + */ + vr = (struct vring *)(vq + 1); + vr->used = used; + + vq->priv = vdev; + return vq; +free_used: + free_pages((unsigned long)used, + get_order(vdev->used_size[index])); +del_vq: + vring_del_virtqueue(vq); +unmap: + vpdev->hw_ops->iounmap(vpdev, vdev->vr[index]); + return ERR_PTR(err); +} + +static int vop_find_vqs(struct virtio_device *dev, unsigned nvqs, + struct virtqueue *vqs[], + vq_callback_t *callbacks[], + const char * const names[], const bool *ctx, + struct irq_affinity *desc) +{ + struct _vop_vdev *vdev = to_vopvdev(dev); + struct vop_device *vpdev = vdev->vpdev; + struct mic_device_ctrl __iomem *dc = vdev->dc; + int i, err, retry; + + /* We must have this many virtqueues. */ + if (nvqs > ioread8(&vdev->desc->num_vq)) + return -ENOENT; + + for (i = 0; i < nvqs; ++i) { + dev_dbg(_vop_dev(vdev), "%s: %d: %s\n", + __func__, i, names[i]); + vqs[i] = vop_find_vq(dev, i, callbacks[i], names[i], + ctx ? ctx[i] : false); + if (IS_ERR(vqs[i])) { + err = PTR_ERR(vqs[i]); + goto error; + } + } + + iowrite8(1, &dc->used_address_updated); + /* + * Send an interrupt to the host to inform it that used + * rings have been re-assigned. + */ + vpdev->hw_ops->send_intr(vpdev, vdev->c2h_vdev_db); + for (retry = 100; --retry;) { + if (!ioread8(&dc->used_address_updated)) + break; + msleep(100); + }; + + dev_dbg(_vop_dev(vdev), "%s: retry: %d\n", __func__, retry); + if (!retry) { + err = -ENODEV; + goto error; + } + + return 0; +error: + vop_del_vqs(dev); + return err; +} + +/* + * The config ops structure as defined by virtio config + */ +static struct virtio_config_ops vop_vq_config_ops = { + .get_features = vop_get_features, + .finalize_features = vop_finalize_features, + .get = vop_get, + .set = vop_set, + .get_status = vop_get_status, + .set_status = vop_set_status, + .reset = vop_reset, + .find_vqs = vop_find_vqs, + .del_vqs = vop_del_vqs, +}; + +static irqreturn_t vop_virtio_intr_handler(int irq, void *data) +{ + struct _vop_vdev *vdev = data; + struct vop_device *vpdev = vdev->vpdev; + struct virtqueue *vq; + + vpdev->hw_ops->ack_interrupt(vpdev, vdev->h2c_vdev_db); + list_for_each_entry(vq, &vdev->vdev.vqs, list) + vring_interrupt(0, vq); + + return IRQ_HANDLED; +} + +static void vop_virtio_release_dev(struct device *_d) +{ + struct virtio_device *vdev = + container_of(_d, struct virtio_device, dev); + struct _vop_vdev *vop_vdev = + container_of(vdev, struct _vop_vdev, vdev); + + kfree(vop_vdev); +} + +/* + * adds a new device and register it with virtio + * appropriate drivers are loaded by the device model + */ +static int _vop_add_device(struct mic_device_desc __iomem *d, + unsigned int offset, struct vop_device *vpdev, + int dnode) +{ + struct _vop_vdev *vdev, *reg_dev = NULL; + int ret; + u8 type = ioread8(&d->type); + + vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); + if (!vdev) + return -ENOMEM; + + vdev->vpdev = vpdev; + vdev->vdev.dev.parent = &vpdev->dev; + vdev->vdev.dev.release = vop_virtio_release_dev; + vdev->vdev.id.device = type; + vdev->vdev.config = &vop_vq_config_ops; + vdev->desc = d; + vdev->dc = (void __iomem *)d + _vop_aligned_desc_size(d); + vdev->dnode = dnode; + vdev->vdev.priv = (void *)(u64)dnode; + init_completion(&vdev->reset_done); + + vdev->h2c_vdev_db = vpdev->hw_ops->next_db(vpdev); + vdev->virtio_cookie = vpdev->hw_ops->request_irq(vpdev, + vop_virtio_intr_handler, "virtio intr", + vdev, vdev->h2c_vdev_db); + if (IS_ERR(vdev->virtio_cookie)) { + ret = PTR_ERR(vdev->virtio_cookie); + goto kfree; + } + iowrite8((u8)vdev->h2c_vdev_db, &vdev->dc->h2c_vdev_db); + vdev->c2h_vdev_db = ioread8(&vdev->dc->c2h_vdev_db); + + ret = register_virtio_device(&vdev->vdev); + reg_dev = vdev; + if (ret) { + dev_err(_vop_dev(vdev), + "Failed to register vop device %u type %u\n", + offset, type); + goto free_irq; + } + writeq((u64)vdev, &vdev->dc->vdev); + dev_dbg(_vop_dev(vdev), "%s: registered vop device %u type %u vdev %p\n", + __func__, offset, type, vdev); + + return 0; + +free_irq: + vpdev->hw_ops->free_irq(vpdev, vdev->virtio_cookie, vdev); +kfree: + if (reg_dev) + put_device(&vdev->vdev.dev); + else + kfree(vdev); + return ret; +} + +/* + * match for a vop device with a specific desc pointer + */ +static int vop_match_desc(struct device *dev, void *data) +{ + struct virtio_device *_dev = dev_to_virtio(dev); + struct _vop_vdev *vdev = to_vopvdev(_dev); + + return vdev->desc == (void __iomem *)data; +} + +static void _vop_handle_config_change(struct mic_device_desc __iomem *d, + unsigned int offset, + struct vop_device *vpdev) +{ + struct mic_device_ctrl __iomem *dc + = (void __iomem *)d + _vop_aligned_desc_size(d); + struct _vop_vdev *vdev = (struct _vop_vdev *)readq(&dc->vdev); + + if (ioread8(&dc->config_change) != MIC_VIRTIO_PARAM_CONFIG_CHANGED) + return; + + dev_dbg(&vpdev->dev, "%s %d\n", __func__, __LINE__); + virtio_config_changed(&vdev->vdev); + iowrite8(1, &dc->guest_ack); +} + +/* + * removes a virtio device if a hot remove event has been + * requested by the host. + */ +static int _vop_remove_device(struct mic_device_desc __iomem *d, + unsigned int offset, struct vop_device *vpdev) +{ + struct mic_device_ctrl __iomem *dc + = (void __iomem *)d + _vop_aligned_desc_size(d); + struct _vop_vdev *vdev = (struct _vop_vdev *)readq(&dc->vdev); + u8 status; + int ret = -1; + + if (ioread8(&dc->config_change) == MIC_VIRTIO_PARAM_DEV_REMOVE) { + struct device *dev = get_device(&vdev->vdev.dev); + + dev_dbg(&vpdev->dev, + "%s %d config_change %d type %d vdev %p\n", + __func__, __LINE__, + ioread8(&dc->config_change), ioread8(&d->type), vdev); + status = ioread8(&d->status); + reinit_completion(&vdev->reset_done); + unregister_virtio_device(&vdev->vdev); + vpdev->hw_ops->free_irq(vpdev, vdev->virtio_cookie, vdev); + iowrite8(-1, &dc->h2c_vdev_db); + if (status & VIRTIO_CONFIG_S_DRIVER_OK) + wait_for_completion(&vdev->reset_done); + put_device(dev); + iowrite8(1, &dc->guest_ack); + dev_dbg(&vpdev->dev, "%s %d guest_ack %d\n", + __func__, __LINE__, ioread8(&dc->guest_ack)); + iowrite8(-1, &d->type); + ret = 0; + } + return ret; +} + +#define REMOVE_DEVICES true + +static void _vop_scan_devices(void __iomem *dp, struct vop_device *vpdev, + bool remove, int dnode) +{ + s8 type; + unsigned int i; + struct mic_device_desc __iomem *d; + struct mic_device_ctrl __iomem *dc; + struct device *dev; + int ret; + + for (i = sizeof(struct mic_bootparam); + i < MIC_DP_SIZE; i += _vop_total_desc_size(d)) { + d = dp + i; + dc = (void __iomem *)d + _vop_aligned_desc_size(d); + /* + * This read barrier is paired with the corresponding write + * barrier on the host which is inserted before adding or + * removing a virtio device descriptor, by updating the type. + */ + rmb(); + type = ioread8(&d->type); + + /* end of list */ + if (type == 0) + break; + + if (type == -1) + continue; + + /* device already exists */ + dev = device_find_child(&vpdev->dev, (void __force *)d, + vop_match_desc); + if (dev) { + if (remove) + iowrite8(MIC_VIRTIO_PARAM_DEV_REMOVE, + &dc->config_change); + put_device(dev); + _vop_handle_config_change(d, i, vpdev); + ret = _vop_remove_device(d, i, vpdev); + if (remove) { + iowrite8(0, &dc->config_change); + iowrite8(0, &dc->guest_ack); + } + continue; + } + + /* new device */ + dev_dbg(&vpdev->dev, "%s %d Adding new virtio device %p\n", + __func__, __LINE__, d); + if (!remove) + _vop_add_device(d, i, vpdev, dnode); + } +} + +static void vop_scan_devices(struct vop_info *vi, + struct vop_device *vpdev, bool remove) +{ + void __iomem *dp = vpdev->hw_ops->get_remote_dp(vpdev); + + if (!dp) + return; + mutex_lock(&vi->vop_mutex); + _vop_scan_devices(dp, vpdev, remove, vpdev->dnode); + mutex_unlock(&vi->vop_mutex); +} + +/* + * vop_hotplug_device tries to find changes in the device page. + */ +static void vop_hotplug_devices(struct work_struct *work) +{ + struct vop_info *vi = container_of(work, struct vop_info, + hotplug_work); + + vop_scan_devices(vi, vi->vpdev, !REMOVE_DEVICES); +} + +/* + * Interrupt handler for hot plug/config changes etc. + */ +static irqreturn_t vop_extint_handler(int irq, void *data) +{ + struct vop_info *vi = data; + struct mic_bootparam __iomem *bp; + struct vop_device *vpdev = vi->vpdev; + + bp = vpdev->hw_ops->get_remote_dp(vpdev); + dev_dbg(&vpdev->dev, "%s %d hotplug work\n", + __func__, __LINE__); + vpdev->hw_ops->ack_interrupt(vpdev, ioread8(&bp->h2c_config_db)); + schedule_work(&vi->hotplug_work); + return IRQ_HANDLED; +} + +static int vop_driver_probe(struct vop_device *vpdev) +{ + struct vop_info *vi; + int rc; + + vi = kzalloc(sizeof(*vi), GFP_KERNEL); + if (!vi) { + rc = -ENOMEM; + goto exit; + } + dev_set_drvdata(&vpdev->dev, vi); + vi->vpdev = vpdev; + + mutex_init(&vi->vop_mutex); + INIT_WORK(&vi->hotplug_work, vop_hotplug_devices); + if (vpdev->dnode) { + rc = vop_host_init(vi); + if (rc < 0) + goto free; + } else { + struct mic_bootparam __iomem *bootparam; + + vop_scan_devices(vi, vpdev, !REMOVE_DEVICES); + + vi->h2c_config_db = vpdev->hw_ops->next_db(vpdev); + vi->cookie = vpdev->hw_ops->request_irq(vpdev, + vop_extint_handler, + "virtio_config_intr", + vi, vi->h2c_config_db); + if (IS_ERR(vi->cookie)) { + rc = PTR_ERR(vi->cookie); + goto free; + } + bootparam = vpdev->hw_ops->get_remote_dp(vpdev); + iowrite8(vi->h2c_config_db, &bootparam->h2c_config_db); + } + vop_init_debugfs(vi); + return 0; +free: + kfree(vi); +exit: + return rc; +} + +static void vop_driver_remove(struct vop_device *vpdev) +{ + struct vop_info *vi = dev_get_drvdata(&vpdev->dev); + + if (vpdev->dnode) { + vop_host_uninit(vi); + } else { + struct mic_bootparam __iomem *bootparam = + vpdev->hw_ops->get_remote_dp(vpdev); + if (bootparam) + iowrite8(-1, &bootparam->h2c_config_db); + vpdev->hw_ops->free_irq(vpdev, vi->cookie, vi); + flush_work(&vi->hotplug_work); + vop_scan_devices(vi, vpdev, REMOVE_DEVICES); + } + vop_exit_debugfs(vi); + kfree(vi); +} + +static struct vop_device_id id_table[] = { + { VOP_DEV_TRNSP, VOP_DEV_ANY_ID }, + { 0 }, +}; + +static struct vop_driver vop_driver = { + .driver.name = KBUILD_MODNAME, + .driver.owner = THIS_MODULE, + .id_table = id_table, + .probe = vop_driver_probe, + .remove = vop_driver_remove, +}; + +module_vop_driver(vop_driver); + +MODULE_DEVICE_TABLE(mbus, id_table); +MODULE_AUTHOR("Intel Corporation"); +MODULE_DESCRIPTION("Intel(R) Virtio Over PCIe (VOP) driver"); +MODULE_LICENSE("GPL v2"); |