iw_cxgb4: dump detailed driver-specific QP information
authorSteve Wise <swise@opengridcomputing.com>
Thu, 3 May 2018 15:41:49 +0000 (08:41 -0700)
committerDoug Ledford <dledford@redhat.com>
Thu, 3 May 2018 19:51:27 +0000 (15:51 -0400)
Provide a cxgb4-specific function to fill in qp state details.
This allows dumping important c4iw_qp state useful for debugging.

Included in the dump are the t4_sq, t4_rq structs, plus a dump
of the t4_swsqe and t4swrqe descriptors for the first and last
pending entries.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/hw/cxgb4/Makefile
drivers/infiniband/hw/cxgb4/iw_cxgb4.h
drivers/infiniband/hw/cxgb4/provider.c
drivers/infiniband/hw/cxgb4/restrack.c [new file with mode: 0644]

index fa40b685831b3f4d77e7f0080ce96e2f0fa67336..9edd92023e18f0481203563d2ffb69ef1860f190 100644 (file)
@@ -3,4 +3,5 @@ ccflags-y += -Idrivers/net/ethernet/chelsio/libcxgb
 
 obj-$(CONFIG_INFINIBAND_CXGB4) += iw_cxgb4.o
 
-iw_cxgb4-y :=  device.o cm.o provider.o mem.o cq.o qp.o resource.o ev.o id_table.o
+iw_cxgb4-y :=  device.o cm.o provider.o mem.o cq.o qp.o resource.o ev.o id_table.o \
+              restrack.o
index cc929002c05eb3ee244f95b1a33329fa72ab139a..5eec8772468c7bce380314c77f017698413d2e2a 100644 (file)
@@ -55,6 +55,7 @@
 #include <rdma/iw_cm.h>
 #include <rdma/rdma_netlink.h>
 #include <rdma/iw_portmap.h>
+#include <rdma/restrack.h>
 
 #include "cxgb4.h"
 #include "cxgb4_uld.h"
@@ -1078,4 +1079,8 @@ extern int use_dsgl;
 void c4iw_invalidate_mr(struct c4iw_dev *rhp, u32 rkey);
 struct c4iw_wr_wait *c4iw_alloc_wr_wait(gfp_t gfp);
 
+typedef int c4iw_restrack_func(struct sk_buff *msg,
+                              struct rdma_restrack_entry *res);
+extern c4iw_restrack_func *c4iw_restrack_funcs[RDMA_RESTRACK_MAX];
+
 #endif
index 0b9cc73c3ded4d1278eba138f37be5a14a0193b0..1feade8bb4b3b2b56e38af281362d7aa4a4796aa 100644 (file)
@@ -551,6 +551,13 @@ static struct net_device *get_netdev(struct ib_device *dev, u8 port)
        return ndev;
 }
 
+static int fill_res_entry(struct sk_buff *msg, struct rdma_restrack_entry *res)
+{
+       return (res->type < ARRAY_SIZE(c4iw_restrack_funcs) &&
+               c4iw_restrack_funcs[res->type]) ?
+               c4iw_restrack_funcs[res->type](msg, res) : 0;
+}
+
 void c4iw_register_device(struct work_struct *work)
 {
        int ret;
@@ -645,6 +652,7 @@ void c4iw_register_device(struct work_struct *work)
        dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref;
        dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref;
        dev->ibdev.iwcm->get_qp = c4iw_get_qp;
+       dev->ibdev.res.fill_res_entry = fill_res_entry;
        memcpy(dev->ibdev.iwcm->ifname, dev->rdev.lldi.ports[0]->name,
               sizeof(dev->ibdev.iwcm->ifname));
 
diff --git a/drivers/infiniband/hw/cxgb4/restrack.c b/drivers/infiniband/hw/cxgb4/restrack.c
new file mode 100644 (file)
index 0000000..a677940
--- /dev/null
@@ -0,0 +1,248 @@
+/*
+ * Copyright (c) 2018 Chelsio, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "iw_cxgb4.h"
+#include <rdma/restrack.h>
+#include <uapi/rdma/rdma_netlink.h>
+
+static int fill_sq(struct sk_buff *msg, struct t4_wq *wq)
+{
+       /* WQ+SQ */
+       if (rdma_nl_put_driver_u32(msg, "sqid", wq->sq.qid))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "flushed", wq->flushed))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "memsize", wq->sq.memsize))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "cidx", wq->sq.cidx))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "pidx", wq->sq.pidx))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "wq_pidx", wq->sq.wq_pidx))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "flush_cidx", wq->sq.flush_cidx))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "in_use", wq->sq.in_use))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "size", wq->sq.size))
+               goto err;
+       if (rdma_nl_put_driver_u32_hex(msg, "flags", wq->sq.flags))
+               goto err;
+       return 0;
+err:
+       return -EMSGSIZE;
+}
+
+static int fill_rq(struct sk_buff *msg, struct t4_wq *wq)
+{
+       /* RQ */
+       if (rdma_nl_put_driver_u32(msg, "rqid", wq->rq.qid))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "memsize", wq->rq.memsize))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "cidx", wq->rq.cidx))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "pidx", wq->rq.pidx))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "wq_pidx", wq->rq.wq_pidx))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "msn", wq->rq.msn))
+               goto err;
+       if (rdma_nl_put_driver_u32_hex(msg, "rqt_hwaddr", wq->rq.rqt_hwaddr))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "rqt_size", wq->rq.rqt_size))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "in_use", wq->rq.in_use))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "size", wq->rq.size))
+               goto err;
+       return 0;
+err:
+       return -EMSGSIZE;
+}
+
+static int fill_swsqe(struct sk_buff *msg, struct t4_sq *sq, u16 idx,
+                     struct t4_swsqe *sqe)
+{
+       if (rdma_nl_put_driver_u32(msg, "idx", idx))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "opcode", sqe->opcode))
+               goto err;
+       if (rdma_nl_put_driver_u64_hex(msg, "wr_id", sqe->wr_id))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "complete", sqe->complete))
+               goto err;
+       if (sqe->complete &&
+           rdma_nl_put_driver_u32(msg, "cqe_status", CQE_STATUS(&sqe->cqe)))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "signaled", sqe->signaled))
+               goto err;
+       if (rdma_nl_put_driver_u32(msg, "flushed", sqe->flushed))
+               goto err;
+       return 0;
+err:
+       return -EMSGSIZE;
+}
+
+/*
+ * Dump the first and last pending sqes.
+ */
+static int fill_swsqes(struct sk_buff *msg, struct t4_sq *sq,
+                      u16 first_idx, struct t4_swsqe *first_sqe,
+                      u16 last_idx, struct t4_swsqe *last_sqe)
+{
+       if (!first_sqe)
+               goto out;
+       if (fill_swsqe(msg, sq, first_idx, first_sqe))
+               goto err;
+       if (!last_sqe)
+               goto out;
+       if (fill_swsqe(msg, sq, last_idx, last_sqe))
+               goto err;
+out:
+       return 0;
+err:
+       return -EMSGSIZE;
+}
+
+static int fill_swrqe(struct sk_buff *msg, struct t4_rq *rq, u16 idx,
+                     struct t4_swrqe *rqe)
+{
+       if (rdma_nl_put_driver_u32(msg, "idx", idx))
+               goto err;
+       if (rdma_nl_put_driver_u64_hex(msg, "wr_id", rqe->wr_id))
+               goto err;
+       return 0;
+err:
+       return -EMSGSIZE;
+}
+
+/*
+ * Dump the first and last pending rqes.
+ */
+static int fill_swrqes(struct sk_buff *msg, struct t4_rq *rq,
+                      u16 first_idx, struct t4_swrqe *first_rqe,
+                      u16 last_idx, struct t4_swrqe *last_rqe)
+{
+       if (!first_rqe)
+               goto out;
+       if (fill_swrqe(msg, rq, first_idx, first_rqe))
+               goto err;
+       if (!last_rqe)
+               goto out;
+       if (fill_swrqe(msg, rq, last_idx, last_rqe))
+               goto err;
+out:
+       return 0;
+err:
+       return -EMSGSIZE;
+}
+
+static int fill_res_qp_entry(struct sk_buff *msg,
+                            struct rdma_restrack_entry *res)
+{
+       struct ib_qp *ibqp = container_of(res, struct ib_qp, res);
+       struct t4_swsqe *fsp = NULL, *lsp = NULL;
+       struct t4_swrqe *frp = NULL, *lrp = NULL;
+       struct c4iw_qp *qhp = to_c4iw_qp(ibqp);
+       struct t4_swsqe first_sqe, last_sqe;
+       struct t4_swrqe first_rqe, last_rqe;
+       u16 first_sq_idx, last_sq_idx;
+       u16 first_rq_idx, last_rq_idx;
+       struct nlattr *table_attr;
+       struct t4_wq wq;
+
+       /* User qp state is not available, so don't dump user qps */
+       if (qhp->ucontext)
+               return 0;
+
+       table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_DRIVER);
+       if (!table_attr)
+               goto err;
+
+       /* Get a consistent snapshot */
+       spin_lock_irq(&qhp->lock);
+       wq = qhp->wq;
+
+       /* If there are any pending sqes, copy the first and last */
+       if (wq.sq.cidx != wq.sq.pidx) {
+               first_sq_idx = wq.sq.cidx;
+               first_sqe = qhp->wq.sq.sw_sq[first_sq_idx];
+               fsp = &first_sqe;
+               last_sq_idx = wq.sq.pidx;
+               if (last_sq_idx-- == 0)
+                       last_sq_idx = wq.sq.size - 1;
+               if (last_sq_idx != first_sq_idx) {
+                       last_sqe = qhp->wq.sq.sw_sq[last_sq_idx];
+                       lsp = &last_sqe;
+               }
+       }
+
+       /* If there are any pending rqes, copy the first and last */
+       if (wq.rq.cidx != wq.rq.pidx) {
+               first_rq_idx = wq.rq.cidx;
+               first_rqe = qhp->wq.rq.sw_rq[first_rq_idx];
+               frp = &first_rqe;
+               last_rq_idx = wq.rq.pidx;
+               if (last_rq_idx-- == 0)
+                       last_rq_idx = wq.rq.size - 1;
+               if (last_rq_idx != first_rq_idx) {
+                       last_rqe = qhp->wq.rq.sw_rq[last_rq_idx];
+                       lrp = &last_rqe;
+               }
+       }
+       spin_unlock_irq(&qhp->lock);
+
+       if (fill_sq(msg, &wq))
+               goto err_cancel_table;
+
+       if (fill_swsqes(msg, &wq.sq, first_sq_idx, fsp, last_sq_idx, lsp))
+               goto err_cancel_table;
+
+       if (fill_rq(msg, &wq))
+               goto err_cancel_table;
+
+       if (fill_swrqes(msg, &wq.rq, first_rq_idx, frp, last_rq_idx, lrp))
+               goto err_cancel_table;
+
+       nla_nest_end(msg, table_attr);
+       return 0;
+
+err_cancel_table:
+       nla_nest_cancel(msg, table_attr);
+err:
+       return -EMSGSIZE;
+}
+
+c4iw_restrack_func *c4iw_restrack_funcs[RDMA_RESTRACK_MAX] = {
+       [RDMA_RESTRACK_QP]      = fill_res_qp_entry,
+};