[openib-general] [PATCH] fix page_size_cap value in ib_query_device for mellanox provider

[Jack Morgenstein]

NOTE!!
This patch also affects interpretation of page_size_cap field in the 
ib_device_attr struct in file ib_verbs.h (i.e., for all providers).
The page_size_cap field is interpreted here as a bitmap of 
power-of-2 page sizes supported by the device.

Signed-off-by: Jack Morgenstein <jackm at mellanox.co.il>

Index: linux-kernel/drivers/infiniband/include/rdma/ib_verbs.h
===================================================================
--- linux-kernel/drivers/infiniband/include/rdma/ib_verbs.h	(revision 3827)
+++ linux-kernel/drivers/infiniband/include/rdma/ib_verbs.h	(working copy)
@@ -91,6 +91,7 @@
 	__be64			node_guid;
 	__be64			sys_image_guid;
 	u64			max_mr_size;
+	/* page_size_cap is a bitmap of supported power-of-2 page sizes. */
 	u64			page_size_cap;
 	u32			vendor_id;
 	u32			vendor_part_id;
Index: linux-kernel/drivers/infiniband/hw/mthca/mthca_dev.h
===================================================================
--- linux-kernel/drivers/infiniband/hw/mthca/mthca_dev.h	(revision 3827)
+++ linux-kernel/drivers/infiniband/hw/mthca/mthca_dev.h	(working copy)
@@ -154,6 +154,8 @@
 	int      reserved_mcgs;
 	int      num_pds;
 	int      reserved_pds;
+	/* page_size_cap is a bitmap of supported power-of-2 page sizes. */
+	u32      page_size_cap;
 	u32      flags;
 	u8       port_width_cap;
 };
Index: linux-kernel/drivers/infiniband/hw/mthca/mthca_main.c
===================================================================
--- linux-kernel/drivers/infiniband/hw/mthca/mthca_main.c	(revision 3827)
+++ linux-kernel/drivers/infiniband/hw/mthca/mthca_main.c	(working copy)
@@ -168,6 +168,7 @@
 	mdev->limits.max_srq_wqes       = dev_lim->max_srq_sz;
 	mdev->limits.reserved_srqs      = dev_lim->reserved_srqs;
 	mdev->limits.reserved_eecs      = dev_lim->reserved_eecs;
+	mdev->limits.page_size_cap      = ~(u32)(dev_lim->min_page_sz - 1);
 	/*
 	 * Subtract 1 from the limit because we need to allocate a
 	 * spare CQE so the HCA HW can tell the difference between an
Index: linux-kernel/drivers/infiniband/hw/mthca/mthca_provider.c
===================================================================
--- linux-kernel/drivers/infiniband/hw/mthca/mthca_provider.c	(revision 3827)
+++ linux-kernel/drivers/infiniband/hw/mthca/mthca_provider.c	(working copy)
@@ -111,6 +111,7 @@
 	props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
 	props->max_total_mcast_qp_attach = props->max_mcast_qp_attach * 
 					   props->max_mcast_grp;
+	props->page_size_cap       = (u64)mdev->limits.page_size_cap;
 
 	err = 0;
  out: