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Subject[PATCH 33 of 33] IB/ipath - fix drift between WCs in user and kernel space
Date
From
# HG changeset patch
# User Robert Walsh <robert.walsh@qlogic.com>
# Date 1173994466 25200
# Node ID e61b0123190cfbc01cc34d1c648d1752a89f8f3d
# Parent c3b5b279bc90e5758da2ac382cbff4ee0245e84b
IB/ipath - fix drift between WCs in user and kernel space

The kernel ib_wc structure now uses a QP pointer, but the user space
equivalent uses a QP number instead. This means we can no longer use
a simple structure copy to copy stuff into user space.

Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>

diff -r c3b5b279bc90 -r e61b0123190c drivers/infiniband/hw/ipath/ipath_cq.c
--- a/drivers/infiniband/hw/ipath/ipath_cq.c Thu Mar 15 14:34:26 2007 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_cq.c Thu Mar 15 14:34:26 2007 -0700
@@ -76,7 +76,20 @@ void ipath_cq_enter(struct ipath_cq *cq,
}
return;
}
- wc->queue[head] = *entry;
+ wc->queue[head].wr_id = entry->wr_id;
+ wc->queue[head].status = entry->status;
+ wc->queue[head].opcode = entry->opcode;
+ wc->queue[head].vendor_err = entry->vendor_err;
+ wc->queue[head].byte_len = entry->byte_len;
+ wc->queue[head].imm_data = (__u32 __force)entry->imm_data;
+ wc->queue[head].qp_num = entry->qp->qp_num;
+ wc->queue[head].src_qp = entry->src_qp;
+ wc->queue[head].wc_flags = entry->wc_flags;
+ wc->queue[head].pkey_index = entry->pkey_index;
+ wc->queue[head].slid = entry->slid;
+ wc->queue[head].sl = entry->sl;
+ wc->queue[head].dlid_path_bits = entry->dlid_path_bits;
+ wc->queue[head].port_num = entry->port_num;
wc->head = next;

if (cq->notify == IB_CQ_NEXT_COMP ||
@@ -122,9 +135,30 @@ int ipath_poll_cq(struct ib_cq *ibcq, in
if (tail > (u32) cq->ibcq.cqe)
tail = (u32) cq->ibcq.cqe;
for (npolled = 0; npolled < num_entries; ++npolled, ++entry) {
+ struct ipath_qp *qp;
+
if (tail == wc->head)
break;
- *entry = wc->queue[tail];
+
+ qp = ipath_lookup_qpn(&to_idev(cq->ibcq.device)->qp_table,
+ wc->queue[tail].qp_num);
+ entry->qp = &qp->ibqp;
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+
+ entry->wr_id = wc->queue[tail].wr_id;
+ entry->status = wc->queue[tail].status;
+ entry->opcode = wc->queue[tail].opcode;
+ entry->vendor_err = wc->queue[tail].vendor_err;
+ entry->byte_len = wc->queue[tail].byte_len;
+ entry->imm_data = wc->queue[tail].imm_data;
+ entry->src_qp = wc->queue[tail].src_qp;
+ entry->wc_flags = wc->queue[tail].wc_flags;
+ entry->pkey_index = wc->queue[tail].pkey_index;
+ entry->slid = wc->queue[tail].slid;
+ entry->sl = wc->queue[tail].sl;
+ entry->dlid_path_bits = wc->queue[tail].dlid_path_bits;
+ entry->port_num = wc->queue[tail].port_num;
if (tail >= cq->ibcq.cqe)
tail = 0;
else
diff -r c3b5b279bc90 -r e61b0123190c drivers/infiniband/hw/ipath/ipath_verbs.h
--- a/drivers/infiniband/hw/ipath/ipath_verbs.h Thu Mar 15 14:34:26 2007 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.h Thu Mar 15 14:34:26 2007 -0700
@@ -40,6 +40,7 @@
#include <linux/interrupt.h>
#include <linux/kref.h>
#include <rdma/ib_pack.h>
+#include <rdma/ib_user_verbs.h>

#include "ipath_layer.h"

@@ -188,7 +189,7 @@ struct ipath_cq_wc {
struct ipath_cq_wc {
u32 head; /* index of next entry to fill */
u32 tail; /* index of next ib_poll_cq() entry */
- struct ib_wc queue[1]; /* this is actually size ibcq.cqe + 1 */
+ struct ib_uverbs_wc queue[1]; /* this is actually size ibcq.cqe + 1 */
};

/*
-
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