From: Xi Wang <wangxi11@xxxxxxxxxx>
Classify the uar address by wrapping the uar type and start page as offset
for hns rdma io mmap.
Signed-off-by: Xi Wang <wangxi11@xxxxxxxxxx>
Signed-off-by: Weihang Li <liweihang@xxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_main.c | 27 ++++++++++++++++++++++++---
include/uapi/rdma/hns-abi.h | 4 ++++
2 files changed, 28 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
index 6c6e82b..00dbbf1 100644
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -338,12 +338,23 @@ static void hns_roce_dealloc_ucontext(struct ib_ucontext *ibcontext)
hns_roce_uar_free(to_hr_dev(ibcontext->device), &context->uar);
}
-static int hns_roce_mmap(struct ib_ucontext *context,
- struct vm_area_struct *vma)
+/* command value is offset[15:8] */
+static inline int hns_roce_mmap_get_command(unsigned long offset)
+{
+ return (offset >> 8) & 0xff;
+}
+
+/* index value is offset[63:16] | offset[7:0] */
+static inline unsigned long hns_roce_mmap_get_index(unsigned long offset)
+{
+ return ((offset >> 16) << 8) | (offset & 0xff);
+}
+
+static int mmap_uar(struct ib_ucontext *context, struct vm_area_struct *vma)
{
struct hns_roce_dev *hr_dev = to_hr_dev(context->device);
- switch (vma->vm_pgoff) {
+ switch (hns_roce_mmap_get_index(vma->vm_pgoff)) {
case 0:
return rdma_user_mmap_io(context, vma,
to_hr_ucontext(context)->uar.pfn,
@@ -370,6 +381,16 @@ static int hns_roce_mmap(struct ib_ucontext *context,
}
}
+static int hns_roce_mmap(struct ib_ucontext *uctx, struct vm_area_struct *vma)
+{
+ switch (hns_roce_mmap_get_command(vma->vm_pgoff)) {
+ case HNS_ROCE_MMAP_REGULAR_PAGE:
+ return mmap_uar(uctx, vma);
+ default:
+ return -EINVAL;
+ }
+}
+
static int hns_roce_port_immutable(struct ib_device *ib_dev, u32 port_num,
struct ib_port_immutable *immutable)
{
diff --git a/include/uapi/rdma/hns-abi.h b/include/uapi/rdma/hns-abi.h
index 42b1776..18529d7 100644
--- a/include/uapi/rdma/hns-abi.h
+++ b/include/uapi/rdma/hns-abi.h
@@ -94,4 +94,8 @@ struct hns_roce_ib_alloc_pd_resp {
__u32 pdn;
};
+enum {
+ HNS_ROCE_MMAP_REGULAR_PAGE,
+};
+
#endif /* HNS_ABI_USER_H */
--
2.7.4
