[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230628065919.54042-4-lulu@redhat.com>
Date: Wed, 28 Jun 2023 14:59:18 +0800
From: Cindy Lu <lulu@...hat.com>
To: lulu@...hat.com, jasowang@...hat.com, mst@...hat.com,
maxime.coquelin@...hat.com, xieyongji@...edance.com,
kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: [RFC 3/4] vduse: Add the function for get/free the mapp pages
From: Your Name <you@...mple.com>
Add the function for get/free pages, ad this info
will saved in dev->reconnect_info
Signed-off-by: Cindy Lu <lulu@...hat.com>
---
drivers/vdpa/vdpa_user/vduse_dev.c | 35 ++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 1b833bf0ae37..3df1256eccb4 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -1313,6 +1313,35 @@ static struct vduse_dev *vduse_dev_get_from_minor(int minor)
return dev;
}
+int vduse_get_vq_reconnnect(struct vduse_dev *dev, u16 idx)
+{
+ struct vdpa_reconnect_info *area;
+ void *addr = (void *)get_zeroed_page(GFP_KERNEL);
+
+ area = &dev->reconnect_info[idx];
+
+ area->addr = virt_to_phys(addr);
+ area->vaddr = (unsigned long)addr;
+ area->size = PAGE_SIZE;
+ area->index = idx;
+
+ return 0;
+}
+
+int vduse_free_vq_reconnnect(struct vduse_dev *dev, u16 idx)
+{
+ struct vdpa_reconnect_info *area;
+
+ area = &dev->reconnect_info[idx];
+ if ((area->size == PAGE_SIZE) && (area->addr != NULL)) {
+ free_page(area->vaddr);
+ area->size = 0;
+ area->addr = 0;
+ area->vaddr = 0;
+ }
+
+ return 0;
+}
static vm_fault_t vduse_vm_fault(struct vm_fault *vmf)
{
@@ -1446,6 +1475,10 @@ static int vduse_destroy_dev(char *name)
mutex_unlock(&dev->lock);
return -EBUSY;
}
+ for (int i = 0; i < dev->vq_num; i++) {
+
+ vduse_free_vq_reconnnect(dev, i);
+ }
dev->connected = true;
mutex_unlock(&dev->lock);
@@ -1583,6 +1616,8 @@ static int vduse_create_dev(struct vduse_dev_config *config,
INIT_WORK(&dev->vqs[i].kick, vduse_vq_kick_work);
spin_lock_init(&dev->vqs[i].kick_lock);
spin_lock_init(&dev->vqs[i].irq_lock);
+
+ vduse_get_vq_reconnnect(dev, i);
}
ret = idr_alloc(&vduse_idr, dev, 1, VDUSE_DEV_MAX, GFP_KERNEL);
--
2.34.3
Powered by blists - more mailing lists