1 files changed, 261 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mana/device.c b/drivers/infiniband/hw/mana/device.c
new file mode 100644
index 000000000000..bdeddb642b87
--- /dev/null
+++ b/drivers/infiniband/hw/mana/device.c
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022, Microsoft Corporation. All rights reserved.
+ */
+
+#include "mana_ib.h"
+#include <net/mana/mana_auxiliary.h>
+#include <net/addrconf.h>
+
+MODULE_DESCRIPTION("Microsoft Azure Network Adapter IB driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("NET_MANA");
+
+static const struct ib_device_ops mana_ib_dev_ops = {
+	.owner = THIS_MODULE,
+	.driver_id = RDMA_DRIVER_MANA,
+	.uverbs_abi_ver = MANA_IB_UVERBS_ABI_VERSION,
+
+	.add_gid = mana_ib_gd_add_gid,
+	.alloc_pd = mana_ib_alloc_pd,
+	.alloc_ucontext = mana_ib_alloc_ucontext,
+	.create_ah = mana_ib_create_ah,
+	.create_cq = mana_ib_create_cq,
+	.create_qp = mana_ib_create_qp,
+	.create_rwq_ind_table = mana_ib_create_rwq_ind_table,
+	.create_wq = mana_ib_create_wq,
+	.dealloc_pd = mana_ib_dealloc_pd,
+	.dealloc_ucontext = mana_ib_dealloc_ucontext,
+	.del_gid = mana_ib_gd_del_gid,
+	.dereg_mr = mana_ib_dereg_mr,
+	.destroy_ah = mana_ib_destroy_ah,
+	.destroy_cq = mana_ib_destroy_cq,
+	.destroy_qp = mana_ib_destroy_qp,
+	.destroy_rwq_ind_table = mana_ib_destroy_rwq_ind_table,
+	.destroy_wq = mana_ib_destroy_wq,
+	.disassociate_ucontext = mana_ib_disassociate_ucontext,
+	.get_dma_mr = mana_ib_get_dma_mr,
+	.get_link_layer = mana_ib_get_link_layer,
+	.get_port_immutable = mana_ib_get_port_immutable,
+	.mmap = mana_ib_mmap,
+	.modify_qp = mana_ib_modify_qp,
+	.modify_wq = mana_ib_modify_wq,
+	.poll_cq = mana_ib_poll_cq,
+	.post_recv = mana_ib_post_recv,
+	.post_send = mana_ib_post_send,
+	.query_device = mana_ib_query_device,
+	.query_gid = mana_ib_query_gid,
+	.query_pkey = mana_ib_query_pkey,
+	.query_port = mana_ib_query_port,
+	.reg_user_mr = mana_ib_reg_user_mr,
+	.reg_user_mr_dmabuf = mana_ib_reg_user_mr_dmabuf,
+	.req_notify_cq = mana_ib_arm_cq,
+
+	INIT_RDMA_OBJ_SIZE(ib_ah, mana_ib_ah, ibah),
+	INIT_RDMA_OBJ_SIZE(ib_cq, mana_ib_cq, ibcq),
+	INIT_RDMA_OBJ_SIZE(ib_pd, mana_ib_pd, ibpd),
+	INIT_RDMA_OBJ_SIZE(ib_qp, mana_ib_qp, ibqp),
+	INIT_RDMA_OBJ_SIZE(ib_ucontext, mana_ib_ucontext, ibucontext),
+	INIT_RDMA_OBJ_SIZE(ib_rwq_ind_table, mana_ib_rwq_ind_table,
+			   ib_ind_table),
+};
+
+static const struct ib_device_ops mana_ib_stats_ops = {
+	.alloc_hw_port_stats = mana_ib_alloc_hw_port_stats,
+	.get_hw_stats = mana_ib_get_hw_stats,
+};
+
+static const struct ib_device_ops mana_ib_device_stats_ops = {
+	.alloc_hw_device_stats = mana_ib_alloc_hw_device_stats,
+};
+
+static int mana_ib_netdev_event(struct notifier_block *this,
+				unsigned long event, void *ptr)
+{
+	struct mana_ib_dev *dev = container_of(this, struct mana_ib_dev, nb);
+	struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
+	struct gdma_context *gc = dev->gdma_dev->gdma_context;
+	struct mana_context *mc = gc->mana.driver_data;
+	struct net_device *ndev;
+	int i;
+
+	/* Only process events from our parent device */
+	for (i = 0; i < dev->ib_dev.phys_port_cnt; i++)
+		if (event_dev == mc->ports[i]) {
+			switch (event) {
+			case NETDEV_CHANGEUPPER:
+				ndev = mana_get_primary_netdev(mc, i, &dev->dev_tracker);
+				/*
+				 * RDMA core will setup GID based on updated netdev.
+				 * It's not possible to race with the core as rtnl lock is being
+				 * held.
+				 */
+				ib_device_set_netdev(&dev->ib_dev, ndev, i + 1);
+
+				/* mana_get_primary_netdev() returns ndev with refcount held */
+				if (ndev)
+					netdev_put(ndev, &dev->dev_tracker);
+
+				return NOTIFY_OK;
+			default:
+				return NOTIFY_DONE;
+			}
+		}
+	return NOTIFY_DONE;
+}
+
+static int mana_ib_probe(struct auxiliary_device *adev,
+			 const struct auxiliary_device_id *id)
+{
+	struct mana_adev *madev = container_of(adev, struct mana_adev, adev);
+	struct gdma_context *gc = madev->mdev->gdma_context;
+	struct mana_context *mc = gc->mana.driver_data;
+	struct gdma_dev *mdev = madev->mdev;
+	struct net_device *ndev;
+	struct mana_ib_dev *dev;
+	u8 mac_addr[ETH_ALEN];
+	int ret, i;
+
+	dev = ib_alloc_device(mana_ib_dev, ib_dev);
+	if (!dev)
+		return -ENOMEM;
+
+	ib_set_device_ops(&dev->ib_dev, &mana_ib_dev_ops);
+	dev->ib_dev.node_type = RDMA_NODE_IB_CA;
+	dev->ib_dev.num_comp_vectors = gc->max_num_queues;
+	dev->ib_dev.dev.parent = gc->dev;
+	dev->gdma_dev = mdev;
+	xa_init_flags(&dev->qp_table_wq, XA_FLAGS_LOCK_IRQ);
+
+	if (mana_ib_is_rnic(dev)) {
+		dev->ib_dev.phys_port_cnt = 1;
+		addrconf_addr_eui48((u8 *)&dev->ib_dev.node_guid, mc->ports[0]->dev_addr);
+		ret = mana_ib_gd_query_adapter_caps(dev);
+		if (ret) {
+			ibdev_err(&dev->ib_dev, "Failed to query device caps, ret %d", ret);
+			goto free_ib_device;
+		}
+
+		ib_set_device_ops(&dev->ib_dev, &mana_ib_stats_ops);
+		if (dev->adapter_caps.feature_flags & MANA_IB_FEATURE_DEV_COUNTERS_SUPPORT)
+			ib_set_device_ops(&dev->ib_dev, &mana_ib_device_stats_ops);
+
+		ret = mana_ib_create_eqs(dev);
+		if (ret) {
+			ibdev_err(&dev->ib_dev, "Failed to create EQs, ret %d", ret);
+			goto free_ib_device;
+		}
+
+		ret = mana_ib_gd_create_rnic_adapter(dev);
+		if (ret)
+			goto destroy_eqs;
+
+		if (dev->adapter_caps.feature_flags & MANA_IB_FEATURE_MULTI_PORTS_SUPPORT)
+			dev->ib_dev.phys_port_cnt = mc->num_ports;
+
+		for (i = 0; i < dev->ib_dev.phys_port_cnt; i++) {
+			ndev = mana_get_primary_netdev(mc, i, &dev->dev_tracker);
+			if (!ndev) {
+				ret = -ENODEV;
+				ibdev_err(&dev->ib_dev,
+					  "Failed to get netdev for IB port %d", i + 1);
+				goto destroy_rnic;
+			}
+			ether_addr_copy(mac_addr, ndev->dev_addr);
+			ret = ib_device_set_netdev(&dev->ib_dev, ndev, i + 1);
+			/* mana_get_primary_netdev() returns ndev with refcount held */
+			netdev_put(ndev, &dev->dev_tracker);
+			if (ret) {
+				ibdev_err(&dev->ib_dev, "Failed to set ib netdev, ret %d", ret);
+				goto destroy_rnic;
+			}
+			ret = mana_ib_gd_config_mac(dev, ADDR_OP_ADD, mac_addr);
+			if (ret) {
+				ibdev_err(&dev->ib_dev, "Failed to add Mac address, ret %d", ret);
+				goto destroy_rnic;
+			}
+		}
+		dev->nb.notifier_call = mana_ib_netdev_event;
+		ret = register_netdevice_notifier(&dev->nb);
+		if (ret) {
+			ibdev_err(&dev->ib_dev, "Failed to register net notifier, %d", ret);
+			goto destroy_rnic;
+		}
+	} else {
+		dev->ib_dev.phys_port_cnt = mc->num_ports;
+		ret = mana_eth_query_adapter_caps(dev);
+		if (ret) {
+			ibdev_err(&dev->ib_dev, "Failed to query ETH device caps, ret %d", ret);
+			goto free_ib_device;
+		}
+	}
+
+	dev->av_pool = dma_pool_create("mana_ib_av", gc->dev, MANA_AV_BUFFER_SIZE,
+				       MANA_AV_BUFFER_SIZE, 0);
+	if (!dev->av_pool) {
+		ret = -ENOMEM;
+		goto deregister_net_notifier;
+	}
+
+	ibdev_dbg(&dev->ib_dev, "mdev=%p id=%d num_ports=%d\n", mdev,
+		  mdev->dev_id.as_uint32, dev->ib_dev.phys_port_cnt);
+
+	ret = ib_register_device(&dev->ib_dev, mana_ib_is_rnic(dev) ? "mana_%d" : "manae_%d",
+				 gc->dev);
+	if (ret)
+		goto deallocate_pool;
+
+	dev_set_drvdata(&adev->dev, dev);
+
+	return 0;
+
+deallocate_pool:
+	dma_pool_destroy(dev->av_pool);
+deregister_net_notifier:
+	if (mana_ib_is_rnic(dev))
+		unregister_netdevice_notifier(&dev->nb);
+destroy_rnic:
+	if (mana_ib_is_rnic(dev))
+		mana_ib_gd_destroy_rnic_adapter(dev);
+destroy_eqs:
+	if (mana_ib_is_rnic(dev))
+		mana_ib_destroy_eqs(dev);
+free_ib_device:
+	xa_destroy(&dev->qp_table_wq);
+	ib_dealloc_device(&dev->ib_dev);
+	return ret;
+}
+
+static void mana_ib_remove(struct auxiliary_device *adev)
+{
+	struct mana_ib_dev *dev = dev_get_drvdata(&adev->dev);
+
+	if (mana_ib_is_rnic(dev))
+		mana_drain_gsi_sqs(dev);
+
+	ib_unregister_device(&dev->ib_dev);
+	dma_pool_destroy(dev->av_pool);
+	if (mana_ib_is_rnic(dev)) {
+		unregister_netdevice_notifier(&dev->nb);
+		mana_ib_gd_destroy_rnic_adapter(dev);
+		mana_ib_destroy_eqs(dev);
+	}
+	xa_destroy(&dev->qp_table_wq);
+	ib_dealloc_device(&dev->ib_dev);
+}
+
+static const struct auxiliary_device_id mana_id_table[] = {
+	{ .name = "mana.rdma", },
+	{ .name = "mana.eth", },
+	{},
+};
+
+MODULE_DEVICE_TABLE(auxiliary, mana_id_table);
+
+static struct auxiliary_driver mana_driver = {
+	.probe = mana_ib_probe,
+	.remove = mana_ib_remove,
+	.id_table = mana_id_table,
+};
+
+module_auxiliary_driver(mana_driver);