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From: Leon Romanovsky <leon@kernel.org>
To: Doug Ledford <dledford@redhat.com>, Jason Gunthorpe <jgg@nvidia.com>
Cc: Parav Pandit <parav@nvidia.com>,
	"David S. Miller" <davem@davemloft.net>,
	Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Karsten Graul <kgraul@linux.ibm.com>,
	linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org,
	linux-s390@vger.kernel.org,
	Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>,
	netdev@vger.kernel.org, rds-devel@oss.oracle.com,
	Santosh Shilimkar <santosh.shilimkar@oracle.com>
Subject: [PATCH rdma-next 1/8] RDMA/core: Check if client supports IB device or not
Date: Mon,  5 Apr 2021 08:49:53 +0300
Message-ID: <20210405055000.215792-2-leon@kernel.org> (raw)
In-Reply-To: <20210405055000.215792-1-leon@kernel.org>

From: Parav Pandit <parav@nvidia.com>

RDMA devices are of different transport(iWarp, IB, RoCE) and have
different attributes.
Not all clients are interested in all type of devices.

Implement a generic callback that each IB client can implement to decide
if client add() or remove() should be done by the IB core or not for a
given IB device, client combination.

Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/infiniband/core/device.c | 3 +++
 include/rdma/ib_verbs.h          | 9 +++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index c660cef66ac6..c9af2deba8c1 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -691,6 +691,9 @@ static int add_client_context(struct ib_device *device,
 	if (!device->kverbs_provider && !client->no_kverbs_req)
 		return 0;
 
+	if (client->is_supported && !client->is_supported(device))
+		return 0;
+
 	down_write(&device->client_data_rwsem);
 	/*
 	 * So long as the client is registered hold both the client and device
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 59138174affa..777fbcbd4858 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2756,6 +2756,15 @@ struct ib_client {
 			const union ib_gid *gid,
 			const struct sockaddr *addr,
 			void *client_data);
+	/*
+	 * Returns if the client is supported for a given device or not.
+	 * @dev: An RDMA device to check if client can support this RDMA or not.
+	 *
+	 * A client that is interested in specific device attributes, should
+	 * implement it to check if client can be supported for this device or
+	 * not.
+	 */
+	bool (*is_supported)(struct ib_device *dev);
 
 	refcount_t uses;
 	struct completion uses_zero;
-- 
2.30.2


  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-05  5:49 [PATCH rdma-next 0/8] Generalize if ULP supported check Leon Romanovsky
2021-04-05  5:49 ` Leon Romanovsky [this message]
2021-04-05  6:20   ` [PATCH rdma-next 1/8] RDMA/core: Check if client supports IB device or not Gal Pressman
2021-04-05  8:46     ` Leon Romanovsky
2021-04-05  5:49 ` [PATCH rdma-next 2/8] RDMA/cma: Skip device which doesn't support CM Leon Romanovsky
2021-04-05  5:49 ` [PATCH rdma-next 3/8] IB/cm: Skip device which doesn't support IB CM Leon Romanovsky
2021-04-05  5:49 ` [PATCH rdma-next 4/8] IB/core: Skip device which doesn't have necessary capabilities Leon Romanovsky
2021-04-06 15:46   ` Jason Gunthorpe
2021-04-07 15:06     ` Parav Pandit
2021-04-07 15:13       ` Jason Gunthorpe
2021-04-07 15:44         ` Parav Pandit
2021-04-08 12:16           ` Jason Gunthorpe
2021-04-09 12:31             ` Parav Pandit
2021-04-05  5:49 ` [PATCH rdma-next 5/8] IB/IPoIB: Skip device which doesn't have InfiniBand port Leon Romanovsky
2021-04-05  5:49 ` [PATCH rdma-next 6/8] IB/opa_vnic: Move to client_supported callback Leon Romanovsky
2021-04-05  5:49 ` [PATCH rdma-next 7/8] net/smc: " Leon Romanovsky
2021-04-05  5:50 ` [PATCH rdma-next 8/8] net/rds: " Leon Romanovsky
2021-04-05 16:12   ` Santosh Shilimkar

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