RDMA/cxgb3: Set the max_mr_size device attribute correctly

cxgb3 only supports 4GB memory regions.  The lustre RDMA code uses
this attribute and currently has to code around our bad setting.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

4 files changed, 4 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/cxgb3/cxio_hal.h b/drivers/infiniband/hw/cxgb3/cxio_hal.h
index 99543d634704..2bcff7f5046e 100644
--- a/drivers/infiniband/hw/cxgb3/cxio_hal.h
+++ b/drivers/infiniband/hw/cxgb3/cxio_hal.h
@@ -53,6 +53,7 @@
 #define T3_MAX_PBL_SIZE 256
 #define T3_MAX_RQ_SIZE 1024
 #define T3_MAX_NUM_STAG (1<<15)
+#define T3_MAX_MR_SIZE 0x100000000ULL
 
 #define T3_STAG_UNSET 0xffffffff
 
diff --git a/drivers/infiniband/hw/cxgb3/iwch.c b/drivers/infiniband/hw/cxgb3/iwch.c
index 6ba4138c8ec3..71554eacb13c 100644
--- a/drivers/infiniband/hw/cxgb3/iwch.c
+++ b/drivers/infiniband/hw/cxgb3/iwch.c
@@ -83,6 +83,7 @@ static void rnic_init(struct iwch_dev *rnicp)
 	rnicp->attr.max_phys_buf_entries = T3_MAX_PBL_SIZE;
 	rnicp->attr.max_pds = T3_MAX_NUM_PD - 1;
 	rnicp->attr.mem_pgsizes_bitmask = 0x7FFF;	/* 4KB-128MB */
+	rnicp->attr.max_mr_size = T3_MAX_MR_SIZE;
 	rnicp->attr.can_resize_wq = 0;
 	rnicp->attr.max_rdma_reads_per_qp = 8;
 	rnicp->attr.max_rdma_read_resources =
diff --git a/drivers/infiniband/hw/cxgb3/iwch.h b/drivers/infiniband/hw/cxgb3/iwch.h
index 9ad9b1e7c8c1..d2409a505e8d 100644
--- a/drivers/infiniband/hw/cxgb3/iwch.h
+++ b/drivers/infiniband/hw/cxgb3/iwch.h
@@ -66,6 +66,7 @@ struct iwch_rnic_attributes {
 	 * size (4k)^i.  Phys block list mode unsupported.
 	 */
 	u32 mem_pgsizes_bitmask;
+	u64 max_mr_size;
 	u8 can_resize_wq;
 
 	/*
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index e343e9e64844..d07d3a377b5f 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -998,7 +998,7 @@ static int iwch_query_device(struct ib_device *ibdev,
 	props->device_cap_flags = dev->device_cap_flags;
 	props->vendor_id = (u32)dev->rdev.rnic_info.pdev->vendor;
 	props->vendor_part_id = (u32)dev->rdev.rnic_info.pdev->device;
-	props->max_mr_size = ~0ull;
+	props->max_mr_size = dev->attr.max_mr_size;
 	props->max_qp = dev->attr.max_qps;
 	props->max_qp_wr = dev->attr.max_wrs;
 	props->max_sge = dev->attr.max_sge_per_wr;