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authorTom Tucker <tom@ogc.us>2012-02-20 13:07:57 -0600
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-03-21 09:31:47 -0400
commit9b78145c0f280d4f01c460d6251eab2584181fa9 (patch)
tree09f0f8b13541db68f23e73be122129a9ee4e4dcb /net/sunrpc/xprtrdma
parent4a6862b3649d705bf41a36e3c7943d0322a9ee27 (diff)
xprtrdma: Remove assumption that each segment is <= PAGE_SIZE
The xprtrdma FRMR mapping logic assumes that a segment is <= PAGE_SIZE. This is not true for NFS4. Signed-off-by: Tom Tucker <tom@ogc.us> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
-rw-r--r--net/sunrpc/xprtrdma/verbs.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 28236bab57f9..745973b729af 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1490,6 +1490,9 @@ rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg,
u8 key;
int len, pageoff;
int i, rc;
+ int seg_len;
+ u64 pa;
+ int page_no;
pageoff = offset_in_page(seg1->mr_offset);
seg1->mr_offset -= pageoff; /* start of page */
@@ -1497,11 +1500,15 @@ rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg,
len = -pageoff;
if (*nsegs > RPCRDMA_MAX_DATA_SEGS)
*nsegs = RPCRDMA_MAX_DATA_SEGS;
- for (i = 0; i < *nsegs;) {
+ for (page_no = i = 0; i < *nsegs;) {
rpcrdma_map_one(ia, seg, writing);
- seg1->mr_chunk.rl_mw->r.frmr.fr_pgl->page_list[i] = seg->mr_dma;
+ pa = seg->mr_dma;
+ for (seg_len = seg->mr_len; seg_len > 0; seg_len -= PAGE_SIZE) {
+ seg1->mr_chunk.rl_mw->r.frmr.fr_pgl->
+ page_list[page_no++] = pa;
+ pa += PAGE_SIZE;
+ }
len += seg->mr_len;
- BUG_ON(seg->mr_len > PAGE_SIZE);
++seg;
++i;
/* Check for holes */
@@ -1540,9 +1547,9 @@ rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg,
frmr_wr.send_flags = IB_SEND_SIGNALED;
frmr_wr.wr.fast_reg.iova_start = seg1->mr_dma;
frmr_wr.wr.fast_reg.page_list = seg1->mr_chunk.rl_mw->r.frmr.fr_pgl;
- frmr_wr.wr.fast_reg.page_list_len = i;
+ frmr_wr.wr.fast_reg.page_list_len = page_no;
frmr_wr.wr.fast_reg.page_shift = PAGE_SHIFT;
- frmr_wr.wr.fast_reg.length = i << PAGE_SHIFT;
+ frmr_wr.wr.fast_reg.length = page_no << PAGE_SHIFT;
BUG_ON(frmr_wr.wr.fast_reg.length < len);
frmr_wr.wr.fast_reg.access_flags = (writing ?
IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE :