path: root/drivers/infiniband/core/agent.c
diff options
authorIra Weiny <ira.weiny@intel.com>2015-06-06 14:38:30 -0400
committerDoug Ledford <dledford@redhat.com>2015-06-12 14:49:17 -0400
commitc9082e51b6a4ba0272c30027d87e67c6652a725d (patch)
treeaac79d30829b3602d5713c8dfa3e4b037d191aaa /drivers/infiniband/core/agent.c
parentIB/core: Add ability for drivers to report an alternate MAD size. (diff)
IB/mad: Convert allocations from kmem_cache to kzalloc
This patch implements allocating alternate receive MAD buffers within the MAD stack. Support for OPA to send/recv variable sized MADs is implemented later. 1) Convert MAD allocations from kmem_cache to kzalloc kzalloc is more flexible to support devices with different sized MADs and research and testing showed that the current use of kmem_cache does not provide performance benefits over kzalloc. 2) Change struct ib_mad_private to use a flex array for the mad data 3) Allocate ib_mad_private based on the size specified by devices in rdma_max_mad_size. 4) Carry the allocated size in ib_mad_private to be used when processing ib_mad_private objects. 5) Alter DMA mappings based on the mad_size of ib_mad_private. 6) Replace the use of sizeof and static defines as appropriate 7) Add appropriate casts for the MAD data when calling processing functions. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core/agent.c')
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/infiniband/core/agent.c b/drivers/infiniband/core/agent.c
index 4fe1fb6b37cd..6c420736ce93 100644
--- a/drivers/infiniband/core/agent.c
+++ b/drivers/infiniband/core/agent.c
@@ -78,9 +78,9 @@ ib_get_agent_port(const struct ib_device *device, int port_num)
return entry;
-void agent_send_response(const struct ib_mad *mad, const struct ib_grh *grh,
+void agent_send_response(const struct ib_mad_hdr *mad_hdr, const struct ib_grh *grh,
const struct ib_wc *wc, const struct ib_device *device,
- int port_num, int qpn)
+ int port_num, int qpn, size_t resp_mad_len)
struct ib_agent_port_private *port_priv;
struct ib_mad_agent *agent;
@@ -107,7 +107,8 @@ void agent_send_response(const struct ib_mad *mad, const struct ib_grh *grh,
send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0,
+ resp_mad_len - IB_MGMT_MAD_HDR,
if (IS_ERR(send_buf)) {
@@ -115,7 +116,7 @@ void agent_send_response(const struct ib_mad *mad, const struct ib_grh *grh,
goto err1;
- memcpy(send_buf->mad, mad, sizeof *mad);
+ memcpy(send_buf->mad, mad_hdr, resp_mad_len);
send_buf->ah = ah;
if (device->node_type == RDMA_NODE_IB_SWITCH) {