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path: root/drivers/vdpa/vdpa_sim/vdpa_sim.c
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-rw-r--r--drivers/vdpa/vdpa_sim/vdpa_sim.c807
1 files changed, 807 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
new file mode 100644
index 000000000..76d41058a
--- /dev/null
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -0,0 +1,807 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * VDPA device simulator core.
+ *
+ * Copyright (c) 2020, Red Hat Inc. All rights reserved.
+ * Author: Jason Wang <jasowang@redhat.com>
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/slab.h>
+#include <linux/dma-map-ops.h>
+#include <linux/vringh.h>
+#include <linux/vdpa.h>
+#include <linux/vhost_iotlb.h>
+#include <uapi/linux/vdpa.h>
+#include <uapi/linux/vhost_types.h>
+
+#include "vdpa_sim.h"
+
+#define DRV_VERSION "0.1"
+#define DRV_AUTHOR "Jason Wang <jasowang@redhat.com>"
+#define DRV_DESC "vDPA Device Simulator core"
+#define DRV_LICENSE "GPL v2"
+
+static int batch_mapping = 1;
+module_param(batch_mapping, int, 0444);
+MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");
+
+static int max_iotlb_entries = 2048;
+module_param(max_iotlb_entries, int, 0444);
+MODULE_PARM_DESC(max_iotlb_entries,
+ "Maximum number of iotlb entries for each address space. 0 means unlimited. (default: 2048)");
+
+static bool use_va = true;
+module_param(use_va, bool, 0444);
+MODULE_PARM_DESC(use_va, "Enable/disable the device's ability to use VA");
+
+#define VDPASIM_QUEUE_ALIGN PAGE_SIZE
+#define VDPASIM_QUEUE_MAX 256
+#define VDPASIM_VENDOR_ID 0
+
+struct vdpasim_mm_work {
+ struct kthread_work work;
+ struct vdpasim *vdpasim;
+ struct mm_struct *mm_to_bind;
+ int ret;
+};
+
+static void vdpasim_mm_work_fn(struct kthread_work *work)
+{
+ struct vdpasim_mm_work *mm_work =
+ container_of(work, struct vdpasim_mm_work, work);
+ struct vdpasim *vdpasim = mm_work->vdpasim;
+
+ mm_work->ret = 0;
+
+ //TODO: should we attach the cgroup of the mm owner?
+ vdpasim->mm_bound = mm_work->mm_to_bind;
+}
+
+static void vdpasim_worker_change_mm_sync(struct vdpasim *vdpasim,
+ struct vdpasim_mm_work *mm_work)
+{
+ struct kthread_work *work = &mm_work->work;
+
+ kthread_init_work(work, vdpasim_mm_work_fn);
+ kthread_queue_work(vdpasim->worker, work);
+
+ kthread_flush_work(work);
+}
+
+static struct vdpasim *vdpa_to_sim(struct vdpa_device *vdpa)
+{
+ return container_of(vdpa, struct vdpasim, vdpa);
+}
+
+static void vdpasim_vq_notify(struct vringh *vring)
+{
+ struct vdpasim_virtqueue *vq =
+ container_of(vring, struct vdpasim_virtqueue, vring);
+
+ if (!vq->cb)
+ return;
+
+ vq->cb(vq->private);
+}
+
+static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx)
+{
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+ uint16_t last_avail_idx = vq->vring.last_avail_idx;
+ struct vring_desc *desc = (struct vring_desc *)
+ (uintptr_t)vq->desc_addr;
+ struct vring_avail *avail = (struct vring_avail *)
+ (uintptr_t)vq->driver_addr;
+ struct vring_used *used = (struct vring_used *)
+ (uintptr_t)vq->device_addr;
+
+ if (use_va && vdpasim->mm_bound) {
+ vringh_init_iotlb_va(&vq->vring, vdpasim->features, vq->num,
+ true, desc, avail, used);
+ } else {
+ vringh_init_iotlb(&vq->vring, vdpasim->features, vq->num,
+ true, desc, avail, used);
+ }
+
+ vq->vring.last_avail_idx = last_avail_idx;
+
+ /*
+ * Since vdpa_sim does not support receive inflight descriptors as a
+ * destination of a migration, let's set both avail_idx and used_idx
+ * the same at vq start. This is how vhost-user works in a
+ * VHOST_SET_VRING_BASE call.
+ *
+ * Although the simple fix is to set last_used_idx at
+ * vdpasim_set_vq_state, it would be reset at vdpasim_queue_ready.
+ */
+ vq->vring.last_used_idx = last_avail_idx;
+ vq->vring.notify = vdpasim_vq_notify;
+}
+
+static void vdpasim_vq_reset(struct vdpasim *vdpasim,
+ struct vdpasim_virtqueue *vq)
+{
+ vq->ready = false;
+ vq->desc_addr = 0;
+ vq->driver_addr = 0;
+ vq->device_addr = 0;
+ vq->cb = NULL;
+ vq->private = NULL;
+ vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,
+ VDPASIM_QUEUE_MAX, false, NULL, NULL, NULL);
+
+ vq->vring.notify = NULL;
+}
+
+static void vdpasim_do_reset(struct vdpasim *vdpasim)
+{
+ int i;
+
+ spin_lock(&vdpasim->iommu_lock);
+
+ for (i = 0; i < vdpasim->dev_attr.nvqs; i++) {
+ vdpasim_vq_reset(vdpasim, &vdpasim->vqs[i]);
+ vringh_set_iotlb(&vdpasim->vqs[i].vring, &vdpasim->iommu[0],
+ &vdpasim->iommu_lock);
+ }
+
+ for (i = 0; i < vdpasim->dev_attr.nas; i++) {
+ vhost_iotlb_reset(&vdpasim->iommu[i]);
+ vhost_iotlb_add_range(&vdpasim->iommu[i], 0, ULONG_MAX,
+ 0, VHOST_MAP_RW);
+ vdpasim->iommu_pt[i] = true;
+ }
+
+ vdpasim->running = true;
+ spin_unlock(&vdpasim->iommu_lock);
+
+ vdpasim->features = 0;
+ vdpasim->status = 0;
+ ++vdpasim->generation;
+}
+
+static const struct vdpa_config_ops vdpasim_config_ops;
+static const struct vdpa_config_ops vdpasim_batch_config_ops;
+
+static void vdpasim_work_fn(struct kthread_work *work)
+{
+ struct vdpasim *vdpasim = container_of(work, struct vdpasim, work);
+ struct mm_struct *mm = vdpasim->mm_bound;
+
+ if (use_va && mm) {
+ if (!mmget_not_zero(mm))
+ return;
+ kthread_use_mm(mm);
+ }
+
+ vdpasim->dev_attr.work_fn(vdpasim);
+
+ if (use_va && mm) {
+ kthread_unuse_mm(mm);
+ mmput(mm);
+ }
+}
+
+struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr,
+ const struct vdpa_dev_set_config *config)
+{
+ const struct vdpa_config_ops *ops;
+ struct vdpa_device *vdpa;
+ struct vdpasim *vdpasim;
+ struct device *dev;
+ int i, ret = -ENOMEM;
+
+ if (!dev_attr->alloc_size)
+ return ERR_PTR(-EINVAL);
+
+ if (config->mask & BIT_ULL(VDPA_ATTR_DEV_FEATURES)) {
+ if (config->device_features &
+ ~dev_attr->supported_features)
+ return ERR_PTR(-EINVAL);
+ dev_attr->supported_features =
+ config->device_features;
+ }
+
+ if (batch_mapping)
+ ops = &vdpasim_batch_config_ops;
+ else
+ ops = &vdpasim_config_ops;
+
+ vdpa = __vdpa_alloc_device(NULL, ops,
+ dev_attr->ngroups, dev_attr->nas,
+ dev_attr->alloc_size,
+ dev_attr->name, use_va);
+ if (IS_ERR(vdpa)) {
+ ret = PTR_ERR(vdpa);
+ goto err_alloc;
+ }
+
+ vdpasim = vdpa_to_sim(vdpa);
+ vdpasim->dev_attr = *dev_attr;
+ dev = &vdpasim->vdpa.dev;
+
+ kthread_init_work(&vdpasim->work, vdpasim_work_fn);
+ vdpasim->worker = kthread_create_worker(0, "vDPA sim worker: %s",
+ dev_attr->name);
+ if (IS_ERR(vdpasim->worker))
+ goto err_iommu;
+
+ mutex_init(&vdpasim->mutex);
+ spin_lock_init(&vdpasim->iommu_lock);
+
+ dev->dma_mask = &dev->coherent_dma_mask;
+ if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
+ goto err_iommu;
+ vdpasim->vdpa.mdev = dev_attr->mgmt_dev;
+
+ vdpasim->config = kzalloc(dev_attr->config_size, GFP_KERNEL);
+ if (!vdpasim->config)
+ goto err_iommu;
+
+ vdpasim->vqs = kcalloc(dev_attr->nvqs, sizeof(struct vdpasim_virtqueue),
+ GFP_KERNEL);
+ if (!vdpasim->vqs)
+ goto err_iommu;
+
+ vdpasim->iommu = kmalloc_array(vdpasim->dev_attr.nas,
+ sizeof(*vdpasim->iommu), GFP_KERNEL);
+ if (!vdpasim->iommu)
+ goto err_iommu;
+
+ vdpasim->iommu_pt = kmalloc_array(vdpasim->dev_attr.nas,
+ sizeof(*vdpasim->iommu_pt), GFP_KERNEL);
+ if (!vdpasim->iommu_pt)
+ goto err_iommu;
+
+ for (i = 0; i < vdpasim->dev_attr.nas; i++)
+ vhost_iotlb_init(&vdpasim->iommu[i], max_iotlb_entries, 0);
+
+ for (i = 0; i < dev_attr->nvqs; i++)
+ vringh_set_iotlb(&vdpasim->vqs[i].vring, &vdpasim->iommu[0],
+ &vdpasim->iommu_lock);
+
+ vdpasim->vdpa.dma_dev = dev;
+
+ return vdpasim;
+
+err_iommu:
+ put_device(dev);
+err_alloc:
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(vdpasim_create);
+
+void vdpasim_schedule_work(struct vdpasim *vdpasim)
+{
+ kthread_queue_work(vdpasim->worker, &vdpasim->work);
+}
+EXPORT_SYMBOL_GPL(vdpasim_schedule_work);
+
+static int vdpasim_set_vq_address(struct vdpa_device *vdpa, u16 idx,
+ u64 desc_area, u64 driver_area,
+ u64 device_area)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+
+ vq->desc_addr = desc_area;
+ vq->driver_addr = driver_area;
+ vq->device_addr = device_area;
+
+ return 0;
+}
+
+static void vdpasim_set_vq_num(struct vdpa_device *vdpa, u16 idx, u32 num)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+
+ vq->num = num;
+}
+
+static void vdpasim_kick_vq(struct vdpa_device *vdpa, u16 idx)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+
+ if (!vdpasim->running &&
+ (vdpasim->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
+ vdpasim->pending_kick = true;
+ return;
+ }
+
+ if (vq->ready)
+ vdpasim_schedule_work(vdpasim);
+}
+
+static void vdpasim_set_vq_cb(struct vdpa_device *vdpa, u16 idx,
+ struct vdpa_callback *cb)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+
+ vq->cb = cb->callback;
+ vq->private = cb->private;
+}
+
+static void vdpasim_set_vq_ready(struct vdpa_device *vdpa, u16 idx, bool ready)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+ bool old_ready;
+
+ mutex_lock(&vdpasim->mutex);
+ old_ready = vq->ready;
+ vq->ready = ready;
+ if (vq->ready && !old_ready) {
+ vdpasim_queue_ready(vdpasim, idx);
+ }
+ mutex_unlock(&vdpasim->mutex);
+}
+
+static bool vdpasim_get_vq_ready(struct vdpa_device *vdpa, u16 idx)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+
+ return vq->ready;
+}
+
+static int vdpasim_set_vq_state(struct vdpa_device *vdpa, u16 idx,
+ const struct vdpa_vq_state *state)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+ struct vringh *vrh = &vq->vring;
+
+ mutex_lock(&vdpasim->mutex);
+ vrh->last_avail_idx = state->split.avail_index;
+ mutex_unlock(&vdpasim->mutex);
+
+ return 0;
+}
+
+static int vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx,
+ struct vdpa_vq_state *state)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
+ struct vringh *vrh = &vq->vring;
+
+ state->split.avail_index = vrh->last_avail_idx;
+ return 0;
+}
+
+static int vdpasim_get_vq_stats(struct vdpa_device *vdpa, u16 idx,
+ struct sk_buff *msg,
+ struct netlink_ext_ack *extack)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ if (vdpasim->dev_attr.get_stats)
+ return vdpasim->dev_attr.get_stats(vdpasim, idx,
+ msg, extack);
+ return -EOPNOTSUPP;
+}
+
+static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
+{
+ return VDPASIM_QUEUE_ALIGN;
+}
+
+static u32 vdpasim_get_vq_group(struct vdpa_device *vdpa, u16 idx)
+{
+ /* RX and TX belongs to group 0, CVQ belongs to group 1 */
+ if (idx == 2)
+ return 1;
+ else
+ return 0;
+}
+
+static u64 vdpasim_get_device_features(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ return vdpasim->dev_attr.supported_features;
+}
+
+static u64 vdpasim_get_backend_features(const struct vdpa_device *vdpa)
+{
+ return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
+}
+
+static int vdpasim_set_driver_features(struct vdpa_device *vdpa, u64 features)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ /* DMA mapping must be done by driver */
+ if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
+ return -EINVAL;
+
+ vdpasim->features = features & vdpasim->dev_attr.supported_features;
+
+ return 0;
+}
+
+static u64 vdpasim_get_driver_features(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ return vdpasim->features;
+}
+
+static void vdpasim_set_config_cb(struct vdpa_device *vdpa,
+ struct vdpa_callback *cb)
+{
+ /* We don't support config interrupt */
+}
+
+static u16 vdpasim_get_vq_num_max(struct vdpa_device *vdpa)
+{
+ return VDPASIM_QUEUE_MAX;
+}
+
+static u32 vdpasim_get_device_id(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ return vdpasim->dev_attr.id;
+}
+
+static u32 vdpasim_get_vendor_id(struct vdpa_device *vdpa)
+{
+ return VDPASIM_VENDOR_ID;
+}
+
+static u8 vdpasim_get_status(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ u8 status;
+
+ mutex_lock(&vdpasim->mutex);
+ status = vdpasim->status;
+ mutex_unlock(&vdpasim->mutex);
+
+ return status;
+}
+
+static void vdpasim_set_status(struct vdpa_device *vdpa, u8 status)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ mutex_lock(&vdpasim->mutex);
+ vdpasim->status = status;
+ mutex_unlock(&vdpasim->mutex);
+}
+
+static int vdpasim_reset(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ mutex_lock(&vdpasim->mutex);
+ vdpasim->status = 0;
+ vdpasim_do_reset(vdpasim);
+ mutex_unlock(&vdpasim->mutex);
+
+ return 0;
+}
+
+static int vdpasim_suspend(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ mutex_lock(&vdpasim->mutex);
+ vdpasim->running = false;
+ mutex_unlock(&vdpasim->mutex);
+
+ return 0;
+}
+
+static int vdpasim_resume(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ int i;
+
+ mutex_lock(&vdpasim->mutex);
+ vdpasim->running = true;
+
+ if (vdpasim->pending_kick) {
+ /* Process pending descriptors */
+ for (i = 0; i < vdpasim->dev_attr.nvqs; ++i)
+ vdpasim_kick_vq(vdpa, i);
+
+ vdpasim->pending_kick = false;
+ }
+
+ mutex_unlock(&vdpasim->mutex);
+
+ return 0;
+}
+
+static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ return vdpasim->dev_attr.config_size;
+}
+
+static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset,
+ void *buf, unsigned int len)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ if (offset + len > vdpasim->dev_attr.config_size)
+ return;
+
+ if (vdpasim->dev_attr.get_config)
+ vdpasim->dev_attr.get_config(vdpasim, vdpasim->config);
+
+ memcpy(buf, vdpasim->config + offset, len);
+}
+
+static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset,
+ const void *buf, unsigned int len)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ if (offset + len > vdpasim->dev_attr.config_size)
+ return;
+
+ memcpy(vdpasim->config + offset, buf, len);
+
+ if (vdpasim->dev_attr.set_config)
+ vdpasim->dev_attr.set_config(vdpasim, vdpasim->config);
+}
+
+static u32 vdpasim_get_generation(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ return vdpasim->generation;
+}
+
+static struct vdpa_iova_range vdpasim_get_iova_range(struct vdpa_device *vdpa)
+{
+ struct vdpa_iova_range range = {
+ .first = 0ULL,
+ .last = ULLONG_MAX,
+ };
+
+ return range;
+}
+
+static int vdpasim_set_group_asid(struct vdpa_device *vdpa, unsigned int group,
+ unsigned int asid)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vhost_iotlb *iommu;
+ int i;
+
+ if (group > vdpasim->dev_attr.ngroups)
+ return -EINVAL;
+
+ if (asid >= vdpasim->dev_attr.nas)
+ return -EINVAL;
+
+ iommu = &vdpasim->iommu[asid];
+
+ mutex_lock(&vdpasim->mutex);
+
+ for (i = 0; i < vdpasim->dev_attr.nvqs; i++)
+ if (vdpasim_get_vq_group(vdpa, i) == group)
+ vringh_set_iotlb(&vdpasim->vqs[i].vring, iommu,
+ &vdpasim->iommu_lock);
+
+ mutex_unlock(&vdpasim->mutex);
+
+ return 0;
+}
+
+static int vdpasim_set_map(struct vdpa_device *vdpa, unsigned int asid,
+ struct vhost_iotlb *iotlb)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vhost_iotlb_map *map;
+ struct vhost_iotlb *iommu;
+ u64 start = 0ULL, last = 0ULL - 1;
+ int ret;
+
+ if (asid >= vdpasim->dev_attr.nas)
+ return -EINVAL;
+
+ spin_lock(&vdpasim->iommu_lock);
+
+ iommu = &vdpasim->iommu[asid];
+ vhost_iotlb_reset(iommu);
+ vdpasim->iommu_pt[asid] = false;
+
+ for (map = vhost_iotlb_itree_first(iotlb, start, last); map;
+ map = vhost_iotlb_itree_next(map, start, last)) {
+ ret = vhost_iotlb_add_range(iommu, map->start,
+ map->last, map->addr, map->perm);
+ if (ret)
+ goto err;
+ }
+ spin_unlock(&vdpasim->iommu_lock);
+ return 0;
+
+err:
+ vhost_iotlb_reset(iommu);
+ spin_unlock(&vdpasim->iommu_lock);
+ return ret;
+}
+
+static int vdpasim_bind_mm(struct vdpa_device *vdpa, struct mm_struct *mm)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_mm_work mm_work;
+
+ mm_work.vdpasim = vdpasim;
+ mm_work.mm_to_bind = mm;
+
+ vdpasim_worker_change_mm_sync(vdpasim, &mm_work);
+
+ return mm_work.ret;
+}
+
+static void vdpasim_unbind_mm(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ struct vdpasim_mm_work mm_work;
+
+ mm_work.vdpasim = vdpasim;
+ mm_work.mm_to_bind = NULL;
+
+ vdpasim_worker_change_mm_sync(vdpasim, &mm_work);
+}
+
+static int vdpasim_dma_map(struct vdpa_device *vdpa, unsigned int asid,
+ u64 iova, u64 size,
+ u64 pa, u32 perm, void *opaque)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ int ret;
+
+ if (asid >= vdpasim->dev_attr.nas)
+ return -EINVAL;
+
+ spin_lock(&vdpasim->iommu_lock);
+ if (vdpasim->iommu_pt[asid]) {
+ vhost_iotlb_reset(&vdpasim->iommu[asid]);
+ vdpasim->iommu_pt[asid] = false;
+ }
+ ret = vhost_iotlb_add_range_ctx(&vdpasim->iommu[asid], iova,
+ iova + size - 1, pa, perm, opaque);
+ spin_unlock(&vdpasim->iommu_lock);
+
+ return ret;
+}
+
+static int vdpasim_dma_unmap(struct vdpa_device *vdpa, unsigned int asid,
+ u64 iova, u64 size)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+ if (asid >= vdpasim->dev_attr.nas)
+ return -EINVAL;
+
+ if (vdpasim->iommu_pt[asid]) {
+ vhost_iotlb_reset(&vdpasim->iommu[asid]);
+ vdpasim->iommu_pt[asid] = false;
+ }
+
+ spin_lock(&vdpasim->iommu_lock);
+ vhost_iotlb_del_range(&vdpasim->iommu[asid], iova, iova + size - 1);
+ spin_unlock(&vdpasim->iommu_lock);
+
+ return 0;
+}
+
+static void vdpasim_free(struct vdpa_device *vdpa)
+{
+ struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ int i;
+
+ kthread_cancel_work_sync(&vdpasim->work);
+ kthread_destroy_worker(vdpasim->worker);
+
+ for (i = 0; i < vdpasim->dev_attr.nvqs; i++) {
+ vringh_kiov_cleanup(&vdpasim->vqs[i].out_iov);
+ vringh_kiov_cleanup(&vdpasim->vqs[i].in_iov);
+ }
+
+ vdpasim->dev_attr.free(vdpasim);
+
+ for (i = 0; i < vdpasim->dev_attr.nas; i++)
+ vhost_iotlb_reset(&vdpasim->iommu[i]);
+ kfree(vdpasim->iommu);
+ kfree(vdpasim->iommu_pt);
+ kfree(vdpasim->vqs);
+ kfree(vdpasim->config);
+}
+
+static const struct vdpa_config_ops vdpasim_config_ops = {
+ .set_vq_address = vdpasim_set_vq_address,
+ .set_vq_num = vdpasim_set_vq_num,
+ .kick_vq = vdpasim_kick_vq,
+ .set_vq_cb = vdpasim_set_vq_cb,
+ .set_vq_ready = vdpasim_set_vq_ready,
+ .get_vq_ready = vdpasim_get_vq_ready,
+ .set_vq_state = vdpasim_set_vq_state,
+ .get_vendor_vq_stats = vdpasim_get_vq_stats,
+ .get_vq_state = vdpasim_get_vq_state,
+ .get_vq_align = vdpasim_get_vq_align,
+ .get_vq_group = vdpasim_get_vq_group,
+ .get_device_features = vdpasim_get_device_features,
+ .get_backend_features = vdpasim_get_backend_features,
+ .set_driver_features = vdpasim_set_driver_features,
+ .get_driver_features = vdpasim_get_driver_features,
+ .set_config_cb = vdpasim_set_config_cb,
+ .get_vq_num_max = vdpasim_get_vq_num_max,
+ .get_device_id = vdpasim_get_device_id,
+ .get_vendor_id = vdpasim_get_vendor_id,
+ .get_status = vdpasim_get_status,
+ .set_status = vdpasim_set_status,
+ .reset = vdpasim_reset,
+ .suspend = vdpasim_suspend,
+ .resume = vdpasim_resume,
+ .get_config_size = vdpasim_get_config_size,
+ .get_config = vdpasim_get_config,
+ .set_config = vdpasim_set_config,
+ .get_generation = vdpasim_get_generation,
+ .get_iova_range = vdpasim_get_iova_range,
+ .set_group_asid = vdpasim_set_group_asid,
+ .dma_map = vdpasim_dma_map,
+ .dma_unmap = vdpasim_dma_unmap,
+ .bind_mm = vdpasim_bind_mm,
+ .unbind_mm = vdpasim_unbind_mm,
+ .free = vdpasim_free,
+};
+
+static const struct vdpa_config_ops vdpasim_batch_config_ops = {
+ .set_vq_address = vdpasim_set_vq_address,
+ .set_vq_num = vdpasim_set_vq_num,
+ .kick_vq = vdpasim_kick_vq,
+ .set_vq_cb = vdpasim_set_vq_cb,
+ .set_vq_ready = vdpasim_set_vq_ready,
+ .get_vq_ready = vdpasim_get_vq_ready,
+ .set_vq_state = vdpasim_set_vq_state,
+ .get_vendor_vq_stats = vdpasim_get_vq_stats,
+ .get_vq_state = vdpasim_get_vq_state,
+ .get_vq_align = vdpasim_get_vq_align,
+ .get_vq_group = vdpasim_get_vq_group,
+ .get_device_features = vdpasim_get_device_features,
+ .get_backend_features = vdpasim_get_backend_features,
+ .set_driver_features = vdpasim_set_driver_features,
+ .get_driver_features = vdpasim_get_driver_features,
+ .set_config_cb = vdpasim_set_config_cb,
+ .get_vq_num_max = vdpasim_get_vq_num_max,
+ .get_device_id = vdpasim_get_device_id,
+ .get_vendor_id = vdpasim_get_vendor_id,
+ .get_status = vdpasim_get_status,
+ .set_status = vdpasim_set_status,
+ .reset = vdpasim_reset,
+ .suspend = vdpasim_suspend,
+ .resume = vdpasim_resume,
+ .get_config_size = vdpasim_get_config_size,
+ .get_config = vdpasim_get_config,
+ .set_config = vdpasim_set_config,
+ .get_generation = vdpasim_get_generation,
+ .get_iova_range = vdpasim_get_iova_range,
+ .set_group_asid = vdpasim_set_group_asid,
+ .set_map = vdpasim_set_map,
+ .bind_mm = vdpasim_bind_mm,
+ .unbind_mm = vdpasim_unbind_mm,
+ .free = vdpasim_free,
+};
+
+MODULE_VERSION(DRV_VERSION);
+MODULE_LICENSE(DRV_LICENSE);
+MODULE_AUTHOR(DRV_AUTHOR);
+MODULE_DESCRIPTION(DRV_DESC);
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-02 05:47:06 +0000