[ewg] [PATCH 2/2] IB/ehca: Add PMA support
Joachim Fenkes
fenkes at de.ibm.com
Fri Jan 25 12:18:27 PST 2008
From: Hoang-Nam Nguyen <hnguyen at de.ibm.com>
This patch enables ehca to redirect any PMA queries to the
actual PMA QP.
Signed-off-by: Hoang-Nam Nguyen <hnguyen at de.ibm.com>
Reviewed-by: Joachim Fenkes <fenkes at de.ibm.com>
Reviewed-by: Christoph Raisch <raisch at de.ibm.com>
---
drivers/infiniband/hw/ehca/ehca_classes.h | 1 +
drivers/infiniband/hw/ehca/ehca_iverbs.h | 5 ++
drivers/infiniband/hw/ehca/ehca_main.c | 2 +-
drivers/infiniband/hw/ehca/ehca_sqp.c | 91 +++++++++++++++++++++++++++++
4 files changed, 98 insertions(+), 1 deletions(-)
diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h
index f281d16..92cce8a 100644
--- a/drivers/infiniband/hw/ehca/ehca_classes.h
+++ b/drivers/infiniband/hw/ehca/ehca_classes.h
@@ -101,6 +101,7 @@ struct ehca_sport {
spinlock_t mod_sqp_lock;
enum ib_port_state port_state;
struct ehca_sma_attr saved_attr;
+ u32 pma_qp_nr;
};
#define HCA_CAP_MR_PGSIZE_4K 0x80000000
diff --git a/drivers/infiniband/hw/ehca/ehca_iverbs.h b/drivers/infiniband/hw/ehca/ehca_iverbs.h
index c469bfd..a8a2ea5 100644
--- a/drivers/infiniband/hw/ehca/ehca_iverbs.h
+++ b/drivers/infiniband/hw/ehca/ehca_iverbs.h
@@ -187,6 +187,11 @@ int ehca_dealloc_ucontext(struct ib_ucontext *context);
int ehca_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
+int ehca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
+ struct ib_wc *in_wc, struct ib_grh *in_grh,
+ struct ib_mad *in_mad,
+ struct ib_mad *out_mad);
+
void ehca_poll_eqs(unsigned long data);
int ehca_calc_ipd(struct ehca_shca *shca, int port,
diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
index 0fe0c84..33b5bac 100644
--- a/drivers/infiniband/hw/ehca/ehca_main.c
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -472,7 +472,7 @@ int ehca_init_device(struct ehca_shca *shca)
shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
shca->ib_device.attach_mcast = ehca_attach_mcast;
shca->ib_device.detach_mcast = ehca_detach_mcast;
- /* shca->ib_device.process_mad = ehca_process_mad; */
+ shca->ib_device.process_mad = ehca_process_mad;
shca->ib_device.mmap = ehca_mmap;
if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
diff --git a/drivers/infiniband/hw/ehca/ehca_sqp.c b/drivers/infiniband/hw/ehca/ehca_sqp.c
index 79e72b2..706d97a 100644
--- a/drivers/infiniband/hw/ehca/ehca_sqp.c
+++ b/drivers/infiniband/hw/ehca/ehca_sqp.c
@@ -39,12 +39,18 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
+#include <rdma/ib_mad.h>
#include "ehca_classes.h"
#include "ehca_tools.h"
#include "ehca_iverbs.h"
#include "hcp_if.h"
+#define IB_MAD_STATUS_REDIRECT __constant_htons(0x0002)
+#define IB_MAD_STATUS_UNSUP_VERSION __constant_htons(0x0004)
+#define IB_MAD_STATUS_UNSUP_METHOD __constant_htons(0x0008)
+
+#define IB_PMA_CLASS_PORT_INFO __constant_htons(0x0001)
/**
* ehca_define_sqp - Defines special queue pair 1 (GSI QP). When special queue
@@ -83,6 +89,9 @@ u64 ehca_define_sqp(struct ehca_shca *shca,
port, ret);
return ret;
}
+ shca->sport[port - 1].pma_qp_nr = pma_qp_nr;
+ ehca_dbg(&shca->ib_device, "port=%x pma_qp_nr=%x",
+ port, pma_qp_nr);
break;
default:
ehca_err(&shca->ib_device, "invalid qp_type=%x",
@@ -109,3 +118,85 @@ u64 ehca_define_sqp(struct ehca_shca *shca,
return H_SUCCESS;
}
+
+struct ib_perf {
+ struct ib_mad_hdr mad_hdr;
+ u8 reserved[40];
+ u8 data[192];
+} __attribute__ ((packed));
+
+
+static int ehca_process_perf(struct ib_device *ibdev, u8 port_num,
+ struct ib_mad *in_mad, struct ib_mad *out_mad)
+{
+ struct ib_perf *in_perf = (struct ib_perf *)in_mad;
+ struct ib_perf *out_perf = (struct ib_perf *)out_mad;
+ struct ib_class_port_info *poi =
+ (struct ib_class_port_info *)out_perf->data;
+ struct ehca_shca *shca =
+ container_of(ibdev, struct ehca_shca, ib_device);
+ struct ehca_sport *sport = &shca->sport[port_num - 1];
+
+ ehca_dbg(ibdev, "method=%x", in_perf->mad_hdr.method);
+
+ *out_mad = *in_mad;
+
+ if (in_perf->mad_hdr.class_version != 1) {
+ ehca_warn(ibdev, "Unsupported class_version=%x",
+ in_perf->mad_hdr.class_version);
+ out_perf->mad_hdr.status = IB_MAD_STATUS_UNSUP_VERSION;
+ goto perf_reply;
+ }
+
+ switch (in_perf->mad_hdr.method) {
+ case IB_MGMT_METHOD_GET:
+ case IB_MGMT_METHOD_SET:
+ /* set class port info for redirection */
+ out_perf->mad_hdr.attr_id = IB_PMA_CLASS_PORT_INFO;
+ out_perf->mad_hdr.status = IB_MAD_STATUS_REDIRECT;
+ memset(poi, 0, sizeof(*poi));
+ poi->base_version = 1;
+ poi->class_version = 1;
+ poi->resp_time_value = 18;
+ poi->redirect_lid = sport->saved_attr.lid;
+ poi->redirect_qp = sport->pma_qp_nr;
+ poi->redirect_qkey = IB_QP1_QKEY;
+ poi->redirect_pkey = IB_DEFAULT_PKEY_FULL;
+
+ ehca_dbg(ibdev, "ehca_pma_lid=%x ehca_pma_qp=%x",
+ sport->saved_attr.lid, sport->pma_qp_nr);
+ break;
+
+ case IB_MGMT_METHOD_GET_RESP:
+ return IB_MAD_RESULT_FAILURE;
+
+ default:
+ out_perf->mad_hdr.status = IB_MAD_STATUS_UNSUP_METHOD;
+ break;
+ }
+
+perf_reply:
+ out_perf->mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
+
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
+}
+
+int ehca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
+ struct ib_wc *in_wc, struct ib_grh *in_grh,
+ struct ib_mad *in_mad,
+ struct ib_mad *out_mad)
+{
+ int ret;
+
+ if (!port_num || port_num > ibdev->phys_port_cnt)
+ return IB_MAD_RESULT_FAILURE;
+
+ /* accept only pma request */
+ if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
+ return IB_MAD_RESULT_SUCCESS;
+
+ ehca_dbg(ibdev, "port_num=%x src_qp=%x", port_num, in_wc->src_qp);
+ ret = ehca_process_perf(ibdev, port_num, in_mad, out_mad);
+
+ return ret;
+}
--
1.5.2
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