This patch implemented the IB core disassociate_ucontext API.
Signed-off-by: Wei Hu (Xavier) <[email protected]>
---
v2->v3: Addressed the comments from Jason. The related link:
https://lkml.org/lkml/2018/5/22/967
v1->v2: no change.
---
drivers/infiniband/hw/hns/hns_roce_device.h | 8 ++++
drivers/infiniband/hw/hns/hns_roce_main.c | 70 ++++++++++++++++++++++++++++-
2 files changed, 77 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h
b/drivers/infiniband/hw/hns/hns_roce_device.h
index da8512b..31221d5 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -217,11 +217,19 @@ struct hns_roce_uar {
unsigned long logic_idx;
};
+struct hns_roce_vma_data {
+ struct list_head list;
+ struct vm_area_struct *vma;
+ struct mutex *vma_list_mutex;
+};
+
struct hns_roce_ucontext {
struct ib_ucontext ibucontext;
struct hns_roce_uar uar;
struct list_head page_list;
struct mutex page_mutex;
+ struct list_head vma_list;
+ struct mutex vma_list_mutex;
};
struct hns_roce_pd {
diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c
b/drivers/infiniband/hw/hns/hns_roce_main.c
index ac51372..42296f0 100644
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -345,6 +345,8 @@ static struct ib_ucontext *hns_roce_alloc_ucontext(struct
ib_device *ib_dev,
if (ret)
goto error_fail_uar_alloc;
+ INIT_LIST_HEAD(&context->vma_list);
+ mutex_init(&context->vma_list_mutex);
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) {
INIT_LIST_HEAD(&context->page_list);
mutex_init(&context->page_mutex);
@@ -375,6 +377,50 @@ static int hns_roce_dealloc_ucontext(struct ib_ucontext
*ibcontext)
return 0;
}
+static void hns_roce_vma_open(struct vm_area_struct *vma)
+{
+ vma->vm_ops = NULL;
+}
+
+static void hns_roce_vma_close(struct vm_area_struct *vma)
+{
+ struct hns_roce_vma_data *vma_data;
+
+ vma_data = (struct hns_roce_vma_data *)vma->vm_private_data;
+ vma_data->vma = NULL;
+ mutex_lock(vma_data->vma_list_mutex);
+ list_del(&vma_data->list);
+ mutex_unlock(vma_data->vma_list_mutex);
+ kfree(vma_data);
+}
+
+static const struct vm_operations_struct hns_roce_vm_ops = {
+ .open = hns_roce_vma_open,
+ .close = hns_roce_vma_close,
+};
+
+static int hns_roce_set_vma_data(struct vm_area_struct *vma,
+ struct hns_roce_ucontext *context)
+{
+ struct list_head *vma_head = &context->vma_list;
+ struct hns_roce_vma_data *vma_data;
+
+ vma_data = kzalloc(sizeof(*vma_data), GFP_KERNEL);
+ if (!vma_data)
+ return -ENOMEM;
+
+ vma_data->vma = vma;
+ vma_data->vma_list_mutex = &context->vma_list_mutex;
+ vma->vm_private_data = vma_data;
+ vma->vm_ops = &hns_roce_vm_ops;
+
+ mutex_lock(&context->vma_list_mutex);
+ list_add(&vma_data->list, vma_head);
+ mutex_unlock(&context->vma_list_mutex);
+
+ return 0;
+}
+
static int hns_roce_mmap(struct ib_ucontext *context,
struct vm_area_struct *vma)
{
@@ -400,7 +446,7 @@ static int hns_roce_mmap(struct ib_ucontext *context,
} else
return -EINVAL;
- return 0;
+ return hns_roce_set_vma_data(vma, to_hr_ucontext(context));
}
static int hns_roce_port_immutable(struct ib_device *ib_dev, u8 port_num,
@@ -424,6 +470,27 @@ static int hns_roce_port_immutable(struct ib_device
*ib_dev, u8 port_num,
return 0;
}
+static void hns_roce_disassociate_ucontext(struct ib_ucontext *ibcontext)
+{
+ struct hns_roce_ucontext *context = to_hr_ucontext(ibcontext);
+ struct hns_roce_vma_data *vma_data, *n;
+ struct vm_area_struct *vma;
+ int ret;
+
+ mutex_lock(&context->vma_list_mutex);
+ list_for_each_entry_safe(vma_data, n, &context->vma_list, list) {
+ vma = vma_data->vma;
+ ret = zap_vma_ptes(vma, vma->vm_start, PAGE_SIZE);
+ WARN_ONCE(ret, "%s: zap_vma_ptes failed", __func__);
+
+ vma->vm_flags &= ~(VM_SHARED | VM_MAYSHARE);
+ vma->vm_ops = NULL;
+ list_del(&vma_data->list);
+ kfree(vma_data);
+ }
+ mutex_unlock(&context->vma_list_mutex);
+}
+
static void hns_roce_unregister_device(struct hns_roce_dev *hr_dev)
{
struct hns_roce_ib_iboe *iboe = &hr_dev->iboe;
@@ -519,6 +586,7 @@ static int hns_roce_register_device(struct hns_roce_dev
*hr_dev)
/* OTHERS */
ib_dev->get_port_immutable = hns_roce_port_immutable;
+ ib_dev->disassociate_ucontext = hns_roce_disassociate_ucontext;
ib_dev->driver_id = RDMA_DRIVER_HNS;
ret = ib_register_device(ib_dev, NULL);
--
1.9.1
