[PATCH v3 06/17] rdma_rxe: Added stubs for alloc_mw and dealloc_mw verbs

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Added a new file focused on memory windows, rxe_mw.c and adds stubbed
out kernel verbs API for alloc_mw and dealloc_mw. These functions are added
to the context ops struct and bits added to the supported APIs mask.

Signed-off-by: Bob Pearson <rpearson@xxxxxxx>
---
 drivers/infiniband/sw/rxe/Makefile    |  1 +
 drivers/infiniband/sw/rxe/rxe_loc.h   |  5 +++++
 drivers/infiniband/sw/rxe/rxe_mw.c    | 22 ++++++++++++++++++++++
 drivers/infiniband/sw/rxe/rxe_verbs.c |  4 ++++
 4 files changed, 32 insertions(+)
 create mode 100644 drivers/infiniband/sw/rxe/rxe_mw.c

diff --git a/drivers/infiniband/sw/rxe/Makefile b/drivers/infiniband/sw/rxe/Makefile
index 66af72dca759..1e24673e9318 100644
--- a/drivers/infiniband/sw/rxe/Makefile
+++ b/drivers/infiniband/sw/rxe/Makefile
@@ -15,6 +15,7 @@ rdma_rxe-y := \
 	rxe_qp.o \
 	rxe_cq.o \
 	rxe_mr.o \
+	rxe_mw.o \
 	rxe_opcode.o \
 	rxe_mmap.o \
 	rxe_icrc.o \
diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h
index 47d1730f43dd..9ab5f2c34def 100644
--- a/drivers/infiniband/sw/rxe/rxe_loc.h
+++ b/drivers/infiniband/sw/rxe/rxe_loc.h
@@ -111,6 +111,11 @@ void rxe_mem_cleanup(struct rxe_pool_entry *arg);
 
 int advance_dma_data(struct rxe_dma_info *dma, unsigned int length);
 
+/* rxe_mw.c */
+struct ib_mw *rxe_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
+			   struct ib_udata *udata);
+int rxe_dealloc_mw(struct ib_mw *ibmw);
+
 /* rxe_net.c */
 void rxe_loopback(struct sk_buff *skb);
 int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb);
diff --git a/drivers/infiniband/sw/rxe/rxe_mw.c b/drivers/infiniband/sw/rxe/rxe_mw.c
new file mode 100644
index 000000000000..f5df5e0b714f
--- /dev/null
+++ b/drivers/infiniband/sw/rxe/rxe_mw.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * linux/drivers/infiniband/sw/rxe/rxe_mw.c
+ *
+ * Copyright (c) 2020 Hewlett Packard Enterprise, Inc. All rights reserved.
+ */
+
+#include "rxe.h"
+#include "rxe_loc.h"
+
+struct ib_mw *rxe_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
+			   struct ib_udata *udata)
+{
+	pr_err_once("%s: not implemented\n", __func__);
+	return ERR_PTR(-EINVAL);
+}
+
+int rxe_dealloc_mw(struct ib_mw *ibmw)
+{
+	pr_err_once("%s: not implemented\n", __func__);
+	return -EINVAL;
+}
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index c2d09998b778..dcd8693f8ce6 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -1106,6 +1106,8 @@ static const struct ib_device_ops rxe_dev_ops = {
 	.reg_user_mr = rxe_reg_user_mr,
 	.req_notify_cq = rxe_req_notify_cq,
 	.resize_cq = rxe_resize_cq,
+	.alloc_mw = rxe_alloc_mw,
+	.dealloc_mw = rxe_dealloc_mw,
 
 	INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah),
 	INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq),
@@ -1167,6 +1169,8 @@ int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name)
 	    | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
 	    | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
 	    | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
+	    | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_MW)
+	    | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_MW)
 	    ;
 
 	ib_set_device_ops(dev, &rxe_dev_ops);
-- 
2.25.1




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