IB/ehca: Change meaning of hca_cap_mr_pgsize

ehca_shca.hca_cap_mr_pgsize now contains all supported page sizes ORed
together. This makes some checks easier to code and understand, plus
we can return this value verbatim in query_hca(), fixing a problem
with SRP (reported by Anton Blanchard -- thanks!).

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
index 403467f66fe6..d477dc3b4760 100644
--- a/drivers/infiniband/hw/ehca/ehca_main.c
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -260,13 +260,20 @@ static struct cap_descr {
         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 };
 
-int ehca_sense_attributes(struct ehca_shca *shca)
+static int ehca_sense_attributes(struct ehca_shca *shca)
 {
         int i, ret = 0;
         u64 h_ret;
         struct hipz_query_hca *rblock;
         struct hipz_query_port *port;
 
+        static const u32 pgsize_map[] = {
+                HCA_CAP_MR_PGSIZE_4K,  0x1000,
+                HCA_CAP_MR_PGSIZE_64K, 0x10000,
+                HCA_CAP_MR_PGSIZE_1M,  0x100000,
+                HCA_CAP_MR_PGSIZE_16M, 0x1000000,
+        };
+
         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
         if (!rblock) {
                 ehca_gen_err("Cannot allocate rblock memory.");
@@ -329,8 +336,15 @@ int ehca_sense_attributes(struct ehca_shca *shca)
                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 
-        shca->hca_cap_mr_pgsize = rblock->memory_page_size_supported;
+        /* translate supported MR page sizes; always support 4K */
+        shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
+        if (ehca_mr_largepage) { /* support extra sizes only if enabled */
+                for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
+                        if (rblock->memory_page_size_supported & pgsize_map[i])
+                                shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
+        }
 
+        /* query max MTU from first port -- it's the same for all ports */
         port = (struct hipz_query_port *)rblock;
         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
         if (h_ret != H_SUCCESS) {