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authorDennis Dalessandro <dennis.dalessandro@intel.com>2016-01-06 10:04:46 -0800
committerDoug Ledford <dledford@redhat.com>2016-03-10 20:37:14 -0500
commit0acb0cc7ecc1e4860b056368566c0c2c254ae281 (patch)
treefda9a57a2c01ae71e5722a8fe10a80a255a62154 /include/rdma/rdmavt_qp.h
parentb4e64397dabc946b83ffb1defa1215ede84c3b97 (diff)
IB/rdmavt: Initialize and teardown of qpn table
Add table init as well as teardown for handling qpn maps. Drivers can still provide this functionality by setting the QP_INIT_DRIVER bit. Reviewed-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma/rdmavt_qp.h')
-rw-r--r--include/rdma/rdmavt_qp.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h
index f33fbb0b3824..e6a7d17dcd30 100644
--- a/include/rdma/rdmavt_qp.h
+++ b/include/rdma/rdmavt_qp.h
@@ -259,4 +259,37 @@ struct rvt_srq {
u32 limit;
};
+#define RVT_QPN_MAX BIT(24)
+#define RVT_QPNMAP_ENTRIES (RVT_QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
+#define RVT_BITS_PER_PAGE (PAGE_SIZE * BITS_PER_BYTE)
+#define RVT_BITS_PER_PAGE_MASK (RVT_BITS_PER_PAGE - 1)
+
+/*
+ * QPN-map pages start out as NULL, they get allocated upon
+ * first use and are never deallocated. This way,
+ * large bitmaps are not allocated unless large numbers of QPs are used.
+ */
+struct rvt_qpn_map {
+ void *page;
+};
+
+struct rvt_qpn_table {
+ spinlock_t lock; /* protect changes to the qp table */
+ unsigned flags; /* flags for QP0/1 allocated for each port */
+ u32 last; /* last QP number allocated */
+ u32 nmaps; /* size of the map table */
+ u16 limit;
+ u8 incr;
+ /* bit map of free QP numbers other than 0/1 */
+ struct rvt_qpn_map map[RVT_QPNMAP_ENTRIES];
+};
+
+struct rvt_qp_ibdev {
+ u32 qp_table_size;
+ u32 qp_table_bits;
+ struct rvt_qp __rcu **qp_table;
+ spinlock_t qpt_lock; /* qptable lock */
+ struct rvt_qpn_table qpn_table;
+};
+
#endif /* DEF_RDMAVT_INCQP_H */