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Subject[RFC PATCH 06/24] vhost-vdpa: switch to use vhost-vdpa specific IOTLB
Date
To ease the implementation of per group ASID support for vDPA
device. This patch switches to use a vhost-vdpa specific IOTLB to
avoid the unnecessary refactoring of the vhost core.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vhost/vdpa.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 74bef1c15a70..ec3c94f706c1 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -40,6 +40,7 @@ struct vhost_vdpa {
struct vhost_virtqueue *vqs;
struct completion completion;
struct vdpa_device *vdpa;
+ struct vhost_iotlb *iotlb;
struct device dev;
struct cdev cdev;
atomic_t opened;
@@ -514,12 +515,11 @@ static void vhost_vdpa_iotlb_unmap(struct vhost_vdpa *v,

static void vhost_vdpa_iotlb_free(struct vhost_vdpa *v)
{
- struct vhost_dev *dev = &v->vdev;
- struct vhost_iotlb *iotlb = dev->iotlb;
+ struct vhost_iotlb *iotlb = v->iotlb;

vhost_vdpa_iotlb_unmap(v, iotlb, 0ULL, 0ULL - 1);
- kfree(dev->iotlb);
- dev->iotlb = NULL;
+ kfree(v->iotlb);
+ v->iotlb = NULL;
}

static int perm_to_iommu_flags(u32 perm)
@@ -681,7 +681,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev,
struct vhost_vdpa *v = container_of(dev, struct vhost_vdpa, vdev);
struct vdpa_device *vdpa = v->vdpa;
const struct vdpa_config_ops *ops = vdpa->config;
- struct vhost_iotlb *iotlb = dev->iotlb;
+ struct vhost_iotlb *iotlb = v->iotlb;
int r = 0;

r = vhost_dev_check_owner(dev);
@@ -812,12 +812,14 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep)

r = vhost_vdpa_alloc_domain(v);
if (r)
- goto err_init_iotlb;
+ goto err_alloc_domain;

filep->private_data = v;

return 0;

+err_alloc_domain:
+ vhost_vdpa_iotlb_free(v);
err_init_iotlb:
vhost_vdpa_cleanup(v);
err:
--
2.20.1
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