qedr: Add support for user context verbs

Add support for ucontext, query port, add and del gid verbs.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/qedr/Makefile

 obj-$(CONFIG_INFINIBAND_QEDR) := qedr.o
 
-qedr-y := main.o
+qedr-y := main.o verbs.o

drivers/infiniband/hw/qedr/main.c

@@ -32,6 +32,7 @@
 #include <linux/module.h>
 #include <rdma/ib_verbs.h>
 #include <rdma/ib_addr.h>
+#include <rdma/ib_user_verbs.h>
 #include <linux/netdevice.h>
 #include <linux/iommu.h>
 #include <net/addrconf.h>
@@ -39,6 +40,8 @@
 #include <linux/qed/qed_chain.h>
 #include <linux/qed/qed_if.h>
 #include "qedr.h"
+#include "verbs.h"
+#include <rdma/qedr-abi.h>
 
 MODULE_DESCRIPTION("QLogic 40G/100G ROCE Driver");
 MODULE_AUTHOR("QLogic Corporation");
@@ -80,6 +83,29 @@ static int qedr_register_device(struct qedr_dev *dev)
 
 	memcpy(dev->ibdev.node_desc, QEDR_NODE_DESC, sizeof(QEDR_NODE_DESC));
 	dev->ibdev.owner = THIS_MODULE;
+	dev->ibdev.uverbs_abi_ver = QEDR_ABI_VERSION;
+
+	dev->ibdev.uverbs_cmd_mask = QEDR_UVERBS(GET_CONTEXT) |
+				     QEDR_UVERBS(QUERY_DEVICE) |
+				     QEDR_UVERBS(QUERY_PORT);
+
+	dev->ibdev.phys_port_cnt = 1;
+	dev->ibdev.num_comp_vectors = dev->num_cnq;
+	dev->ibdev.node_type = RDMA_NODE_IB_CA;
+
+	dev->ibdev.query_device = qedr_query_device;
+	dev->ibdev.query_port = qedr_query_port;
+	dev->ibdev.modify_port = qedr_modify_port;
+
+	dev->ibdev.query_gid = qedr_query_gid;
+	dev->ibdev.add_gid = qedr_add_gid;
+	dev->ibdev.del_gid = qedr_del_gid;
+
+	dev->ibdev.alloc_ucontext = qedr_alloc_ucontext;
+	dev->ibdev.dealloc_ucontext = qedr_dealloc_ucontext;
+	dev->ibdev.mmap = qedr_mmap;
+
+	dev->ibdev.dma_device = &dev->pdev->dev;
 
 	dev->ibdev.get_link_layer = qedr_link_layer;
 	dev->ibdev.get_dev_fw_str = qedr_get_dev_fw_str;

drivers/infiniband/hw/qedr/qedr.h

@@ -49,6 +49,7 @@
 		 DP_NAME(dev) ? DP_NAME(dev) : "", ## __VA_ARGS__)
 
 #define QEDR_MSG_INIT "INIT"
+#define QEDR_MSG_MISC "MISC"
 
 struct qedr_dev;
 
@@ -176,6 +177,39 @@ struct qedr_dev {
 
 #define QEDR_UVERBS(CMD_NAME) (1ull << IB_USER_VERBS_CMD_##CMD_NAME)
 
+#define QEDR_ROCE_PKEY_MAX 1
+#define QEDR_ROCE_PKEY_TABLE_LEN 1
+#define QEDR_ROCE_PKEY_DEFAULT 0xffff
+
+struct qedr_ucontext {
+	struct ib_ucontext ibucontext;
+	struct qedr_dev *dev;
+	struct qedr_pd *pd;
+	u64 dpi_addr;
+	u64 dpi_phys_addr;
+	u32 dpi_size;
+	u16 dpi;
+
+	struct list_head mm_head;
+
+	/* Lock to protect mm list */
+	struct mutex mm_list_lock;
+};
+
+struct qedr_mm {
+	struct {
+		u64 phy_addr;
+		unsigned long len;
+	} key;
+	struct list_head entry;
+};
+
+static inline
+struct qedr_ucontext *get_qedr_ucontext(struct ib_ucontext *ibucontext)
+{
+	return container_of(ibucontext, struct qedr_ucontext, ibucontext);
+}
+
 static inline struct qedr_dev *get_qedr_dev(struct ib_device *ibdev)
 {
 	return container_of(ibdev, struct qedr_dev, ibdev);

drivers/infiniband/hw/qedr/verbs.h

+/* QLogic qedr NIC Driver
+ * Copyright (c) 2015-2016  QLogic Corporation
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and /or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __QEDR_VERBS_H__
+#define __QEDR_VERBS_H__
+
+int qedr_query_device(struct ib_device *ibdev,
+		      struct ib_device_attr *attr, struct ib_udata *udata);
+int qedr_query_port(struct ib_device *, u8 port, struct ib_port_attr *props);
+int qedr_modify_port(struct ib_device *, u8 port, int mask,
+		     struct ib_port_modify *props);
+
+int qedr_query_gid(struct ib_device *, u8 port, int index, union ib_gid *gid);
+
+struct ib_ucontext *qedr_alloc_ucontext(struct ib_device *, struct ib_udata *);
+int qedr_dealloc_ucontext(struct ib_ucontext *);
+
+int qedr_mmap(struct ib_ucontext *, struct vm_area_struct *vma);
+int qedr_del_gid(struct ib_device *device, u8 port_num,
+		 unsigned int index, void **context);
+int qedr_add_gid(struct ib_device *device, u8 port_num,
+		 unsigned int index, const union ib_gid *gid,
+		 const struct ib_gid_attr *attr, void **context);
+#endif

include/uapi/rdma/qedr-abi.h

+/* QLogic qedr NIC Driver
+ * Copyright (c) 2015-2016  QLogic Corporation
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and /or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __QEDR_USER_H__
+#define __QEDR_USER_H__
+
+#include <linux/types.h>
+
+#define QEDR_ABI_VERSION		(8)
+
+/* user kernel communication data structures. */
+
+struct qedr_alloc_ucontext_resp {
+	__u64 db_pa;
+	__u32 db_size;
+
+	__u32 max_send_wr;
+	__u32 max_recv_wr;
+	__u32 max_srq_wr;
+	__u32 sges_per_send_wr;
+	__u32 sges_per_recv_wr;
+	__u32 sges_per_srq_wr;
+	__u32 max_cqes;
+};
+#endif /* __QEDR_USER_H__ */