This patch adds the MR datastructures based on hfi1 into rvt. For now the
data structures are defined in include/rdma/rdma_vt.h but once all MR
functionality has been moved from the drivers into rvt these should move to
rdmavt/mr.h
Reviewed-by: Ira Weiny <ira.we...@intel.com>
Reviewed-by: Dean Luick <dean.lu...@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marcinis...@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessan...@intel.com>
---
Changes since v1:
Rename rdi.lk_table => rdi.lkey_table
include/rdma/rdma_vt.h | 53 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/include/rdma/rdma_vt.h b/include/rdma/rdma_vt.h
index bf072a4..f232e39 100644
--- a/include/rdma/rdma_vt.h
+++ b/include/rdma/rdma_vt.h
@@ -56,6 +56,56 @@
#include "ib_verbs.h"
/*
+ * For Memory Regions. This stuff should probably be moved into rdmavt/mr.h
once
+ * drivers no longer need access to the MR directly.
+ */
+
+/*
+ * A segment is a linear region of low physical memory.
+ * Used by the verbs layer.
+ */
+struct rvt_seg {
+ void *vaddr;
+ size_t length;
+};
+
+/* The number of rvt_segs that fit in a page. */
+#define RVT_SEGSZ (PAGE_SIZE / sizeof(struct rvt_seg))
+
+struct rvt_segarray {
+ struct rvt_seg segs[RVT_SEGSZ];
+};
+
+struct rvt_mregion {
+ struct ib_pd *pd; /* shares refcnt of ibmr.pd */
+ u64 user_base; /* User's address for this region */
+ u64 iova; /* IB start address of this region */
+ size_t length;
+ u32 lkey;
+ u32 offset; /* offset (bytes) to start of region */
+ int access_flags;
+ u32 max_segs; /* number of rvt_segs in all the arrays */
+ u32 mapsz; /* size of the map array */
+ u8 page_shift; /* 0 - non unform/non powerof2 sizes */
+ u8 lkey_published; /* in global table */
+ struct completion comp; /* complete when refcount goes to zero */
+ atomic_t refcount;
+ struct rvt_segarray *map[0]; /* the segments */
+};
+
+#define RVT_MAX_LKEY_TABLE_BITS 23
+
+struct rvt_lkey_table {
+ spinlock_t lock; /* protect changes in this struct */
+ u32 next; /* next unused index (speeds search) */
+ u32 gen; /* generation count */
+ u32 max; /* size of the table */
+ struct rvt_mregion __rcu **table;
+};
+
+/* End Memmory Region */
+
+/*
* Things that are driver specific, module parameters in hfi1 and qib
*/
struct rvt_driver_params {
@@ -119,6 +169,9 @@ struct rvt_dev_info {
/* Driver specific properties */
struct rvt_driver_params dparms;
+ struct rvt_mregion __rcu *dma_mr;
+ struct rvt_lkey_table lkey_table;
+
/* PKey Table goes here */
/*
--
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