IB/ipath: Fix ib_ipath driver to work with SRP
I am still working on a proposal to remove the phys_to_virt() calls
in the ib_ipath driver. In the mean time, this patch allows SRP
to work by fixing the R_Key check and conversion from IB address
to kernel virtual address. It also returns the correct page size
for FMRs.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_keys.c b/drivers/infiniband/hw/ipath/ipath_keys.c
index 46773c6..a5ca279 100644
--- a/drivers/infiniband/hw/ipath/ipath_keys.c
+++ b/drivers/infiniband/hw/ipath/ipath_keys.c
@@ -197,6 +197,21 @@
size_t off;
int ret;
+ /*
+ * We use RKEY == zero for physical addresses
+ * (see ipath_get_dma_mr).
+ */
+ if (rkey == 0) {
+ sge->mr = NULL;
+ sge->vaddr = phys_to_virt(vaddr);
+ sge->length = len;
+ sge->sge_length = len;
+ ss->sg_list = NULL;
+ ss->num_sge = 1;
+ ret = 1;
+ goto bail;
+ }
+
mr = rkt->table[(rkey >> (32 - ib_ipath_lkey_table_size))];
if (unlikely(mr == NULL || mr->lkey != rkey)) {
ret = 0;