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Date: Mon, 5 Apr 2021 08:49:56 +0300 From: Leon Romanovsky <leon@...nel.org> To: Doug Ledford <dledford@...hat.com>, Jason Gunthorpe <jgg@...dia.com> Cc: Parav Pandit <parav@...dia.com>, "David S. Miller" <davem@...emloft.net>, Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>, Jakub Kicinski <kuba@...nel.org>, Karsten Graul <kgraul@...ux.ibm.com>, linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, linux-s390@...r.kernel.org, Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>, netdev@...r.kernel.org, rds-devel@....oracle.com, Santosh Shilimkar <santosh.shilimkar@...cle.com> Subject: [PATCH rdma-next 4/8] IB/core: Skip device which doesn't have necessary capabilities From: Parav Pandit <parav@...dia.com> If device doesn't have multicast capability, avoid client registration for it. This saves 16Kbytes of memory for a RDMA device consist of 128 ports. If device doesn't support subnet administration, avoid client registration for it. This saves 8Kbytes of memory for a RDMA device consist of 128 ports. Signed-off-by: Parav Pandit <parav@...dia.com> Signed-off-by: Leon Romanovsky <leonro@...dia.com> --- drivers/infiniband/core/multicast.c | 15 ++++++++++++++- drivers/infiniband/core/sa_query.c | 15 ++++++++++++++- 2 files changed, 28 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/multicast.c b/drivers/infiniband/core/multicast.c index a5dd4b7a74bc..8c81acc24e3e 100644 --- a/drivers/infiniband/core/multicast.c +++ b/drivers/infiniband/core/multicast.c @@ -44,11 +44,13 @@ static int mcast_add_one(struct ib_device *device); static void mcast_remove_one(struct ib_device *device, void *client_data); +static bool mcast_client_supported(struct ib_device *device); static struct ib_client mcast_client = { .name = "ib_multicast", .add = mcast_add_one, - .remove = mcast_remove_one + .remove = mcast_remove_one, + .is_supported = mcast_client_supported, }; static struct ib_sa_client sa_client; @@ -816,6 +818,17 @@ static void mcast_event_handler(struct ib_event_handler *handler, } } +static bool mcast_client_supported(struct ib_device *device) +{ + u32 i; + + rdma_for_each_port(device, i) { + if (rdma_cap_ib_mcast(device, i)) + return true; + } + return false; +} + static int mcast_add_one(struct ib_device *device) { struct mcast_device *dev; diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c index 9a4a49c37922..7e00e24d9423 100644 --- a/drivers/infiniband/core/sa_query.c +++ b/drivers/infiniband/core/sa_query.c @@ -176,11 +176,13 @@ static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = { static int ib_sa_add_one(struct ib_device *device); static void ib_sa_remove_one(struct ib_device *device, void *client_data); +static bool ib_sa_client_supported(struct ib_device *device); static struct ib_client sa_client = { .name = "sa", .add = ib_sa_add_one, - .remove = ib_sa_remove_one + .remove = ib_sa_remove_one, + .is_supported = ib_sa_client_supported, }; static DEFINE_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); @@ -2293,6 +2295,17 @@ static void ib_sa_event(struct ib_event_handler *handler, } } +static bool ib_sa_client_supported(struct ib_device *device) +{ + unsigned int i; + + rdma_for_each_port(device, i) { + if (rdma_cap_ib_sa(device, i)) + return true; + } + return false; +} + static int ib_sa_add_one(struct ib_device *device) { struct ib_sa_device *sa_dev; -- 2.30.2
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