From: Anand Khoje <anand.a.khoje@oracle.com>
Date: Mon, 12 Jul 2021 17:56:23 +0530
Subject: IB/core: Updating cache for subnet_prefix in
config_non_roce_gid_cache()
Patch-mainline: v5.15-rc1
Git-commit: 0bc0602ae8275aadc7288692331589350987cef7
References: jsc#SLE-19249
Currently, cache for subnet_prefix was getting updated by reading port
attributes via ib_query_port. ib_query_port() calls ops.query_gid() to get
subnet_prefix and returns it via port_attr.
In ib_cache_update(), config_non_roce_gid_cache() obtains GIDs by calling
ops.query_gid(). We utilize this to store subnet_prefix in cache.
Link: https://lore.kernel.org/r/20210712122625.1147-2-anand.a.khoje@oracle.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Suggested-by: Aru Kolappan <aru.kolappan@oracle.com>
Signed-off-by: Anand Khoje <anand.a.khoje@oracle.com>
Signed-off-by: Haakon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/core/cache.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -1429,7 +1429,7 @@ int rdma_read_gid_l2_fields(const struct
EXPORT_SYMBOL(rdma_read_gid_l2_fields);
static int config_non_roce_gid_cache(struct ib_device *device,
- u32 port, int gid_tbl_len)
+ u32 port, struct ib_port_attr *tprops)
{
struct ib_gid_attr gid_attr = {};
struct ib_gid_table *table;
@@ -1441,7 +1441,7 @@ static int config_non_roce_gid_cache(str
table = rdma_gid_table(device, port);
mutex_lock(&table->lock);
- for (i = 0; i < gid_tbl_len; ++i) {
+ for (i = 0; i < tprops->gid_tbl_len; ++i) {
if (!device->ops.query_gid)
continue;
ret = device->ops.query_gid(device, port, i, &gid_attr.gid);
@@ -1452,6 +1452,8 @@ static int config_non_roce_gid_cache(str
goto err;
}
gid_attr.index = i;
+ tprops->subnet_prefix =
+ be64_to_cpu(gid_attr.gid.global.subnet_prefix);
add_modify_gid(table, &gid_attr);
}
err:
@@ -1484,7 +1486,7 @@ ib_cache_update(struct ib_device *device
if (!rdma_protocol_roce(device, port) && update_gids) {
ret = config_non_roce_gid_cache(device, port,
- tprops->gid_tbl_len);
+ tprops);
if (ret)
goto err;
}