p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

RDMA/hns: Implement the disassociate_ucontext API 

This patch implemented the IB core disassociate_ucontext API.

Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Wei Hu(Xavier) 2018-05-28 19:39:27 +08:00 committed by Doug Ledford
parent a0976f418d
commit fedc3abe7b
2 changed files with 77 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/infiniband/hw/hns/hns_roce_device.h
View File

@ -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 {

70
drivers/infiniband/hw/hns/hns_roce_main.c
View File

@ -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);