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RDS: Base init_depth and responder_resources on hw values 

Instead of using a constant for initiator_depth and
responder_resources, read the per-QP values when the
device is enumerated, and then use these values when creating
the connection.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
This commit is contained in:
Andy Grover 2010-01-12 10:50:48 -08:00
parent 15133f6e67
commit 40589e74f7
4 changed files with 24 additions and 11 deletions
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3
net/rds/ib.c
View File

@ -91,6 +91,9 @@ void rds_ib_add_one(struct ib_device *device)
min_t(unsigned int, dev_attr->max_fmr, fmr_pool_size) :
fmr_pool_size;
rds_ibdev->max_initiator_depth = dev_attr->max_qp_init_rd_atom;
rds_ibdev->max_responder_resources = dev_attr->max_qp_rd_atom;
rds_ibdev->dev = device;
rds_ibdev->pd = ib_alloc_pd(device);
if (IS_ERR(rds_ibdev->pd))

2
net/rds/ib.h
View File

@ -164,6 +164,8 @@ struct rds_ib_device {
unsigned int max_fmrs;
int max_sge;
unsigned int max_wrs;
unsigned int max_initiator_depth;
unsigned int max_responder_resources;
spinlock_t spinlock; /* protect the above */
};

27
net/rds/ib_cm.c
View File

@ -153,18 +153,25 @@ void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_even
static void rds_ib_cm_fill_conn_param(struct rds_connection *conn,
struct rdma_conn_param *conn_param,
struct rds_ib_connect_private *dp,
u32 protocol_version)
u32 protocol_version,
u32 max_responder_resources,
u32 max_initiator_depth)
{
struct rds_ib_connection *ic = conn->c_transport_data;
struct rds_ib_device *rds_ibdev;
memset(conn_param, 0, sizeof(struct rdma_conn_param));
/* XXX tune these? */
conn_param->responder_resources = 1;
conn_param->initiator_depth = 1;
rds_ibdev = ib_get_client_data(ic->i_cm_id->device, &rds_ib_client);
conn_param->responder_resources =
min_t(u32, rds_ibdev->max_responder_resources, max_responder_resources);
conn_param->initiator_depth =
min_t(u32, rds_ibdev->max_initiator_depth, max_initiator_depth);
conn_param->retry_count = min_t(unsigned int, rds_ib_retry_count, 7);
conn_param->rnr_retry_count = 7;
if (dp) {
struct rds_ib_connection *ic = conn->c_transport_data;
memset(dp, 0, sizeof(*dp));
dp->dp_saddr = conn->c_laddr;
dp->dp_daddr = conn->c_faddr;
@ -479,7 +486,9 @@ int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
goto out;
}
rds_ib_cm_fill_conn_param(conn, &conn_param, &dp_rep, version);
rds_ib_cm_fill_conn_param(conn, &conn_param, &dp_rep, version,
event->param.conn.responder_resources,
event->param.conn.initiator_depth);
/* rdma_accept() calls rdma_reject() internally if it fails */
err = rdma_accept(cm_id, &conn_param);
@ -516,8 +525,8 @@ int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id)
goto out;
}
rds_ib_cm_fill_conn_param(conn, &conn_param, &dp, RDS_PROTOCOL_VERSION);
rds_ib_cm_fill_conn_param(conn, &conn_param, &dp, RDS_PROTOCOL_VERSION,
UINT_MAX, UINT_MAX);
ret = rdma_connect(cm_id, &conn_param);
if (ret)
rds_ib_conn_error(conn, "rdma_connect failed (%d)\n", ret);

3
net/rds/rdma.c
View File

@ -745,7 +745,6 @@ int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm,
rm->atomic.op_swap_add = args->fadd.add;
}
rm->m_rdma_cookie = args->cookie;
rm->atomic.op_notify = !!(args->flags & RDS_RDMA_NOTIFY_ME);
rm->atomic.op_recverr = rs->rs_recverr;
rm->atomic.op_sg = rds_message_alloc_sgs(rm, 1);
@ -779,7 +778,7 @@ int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm,
rm->atomic.op_notifier->n_status = RDS_RDMA_SUCCESS;
}
rm->atomic.op_rkey = rds_rdma_cookie_key(rm->m_rdma_cookie);
rm->atomic.op_rkey = rds_rdma_cookie_key(args->cookie);
rm->atomic.op_remote_addr = args->remote_addr + rds_rdma_cookie_offset(args->cookie);
rm->atomic.op_active = 1;