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authorJack Morgenstein <jackm@dev.mellanox.co.il>2012-06-19 10:21:44 +0200
committerRoland Dreier <roland@purestorage.com>2012-07-11 20:52:23 +0200
commit6634961c14d38ef64ec284c07aecb03d3dd03b4a (patch)
treea91bc4fa44848799c3035a9bfea1b288c2edac82 /drivers/infiniband/hw/mlx4/mad.c
parentmlx4_core: Allow guests to have IB ports (diff)
downloadlinux-6634961c14d38ef64ec284c07aecb03d3dd03b4a.tar.xz
linux-6634961c14d38ef64ec284c07aecb03d3dd03b4a.zip
mlx4: Put physical GID and P_Key table sizes in mlx4_phys_caps struct and paravirtualize them
To allow easy paravirtualization of P_Key and GID table sizes, keep paravirtualized sizes in mlx4_dev->caps, but save the actual physical sizes from FW in struct: mlx4_dev->phys_cap. In addition, in SR-IOV mode, do the following: 1. Reduce reported P_Key table size by 1. This is done to reserve the highest P_Key index for internal use, for declaring an invalid P_Key in P_Key paravirtualization. We require a P_Key index which always contain an invalid P_Key value for this purpose (i.e., one which cannot be modified by the subnet manager). The way to do this is to reduce the P_Key table size reported to the subnet manager by 1, so that it will not attempt to access the P_Key at index #127. 2. Paravirtualize the GID table size to 1. Thus, each guest sees only a single GID (at its paravirtualized index 0). In addition, since we are paravirtualizing the GID table size to 1, we add paravirtualization of the master GID event here (i.e., we do not do ib_dispatch_event() for the GUID change event on the master, since its (only) GUID never changes). Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx4/mad.c')
-rw-r--r--drivers/infiniband/hw/mlx4/mad.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index 58c45fb5bd31..c27141fef1ab 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -184,8 +184,10 @@ static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad,
break;
case IB_SMP_ATTR_GUID_INFO:
- mlx4_ib_dispatch_event(dev, port_num,
- IB_EVENT_GID_CHANGE);
+ /* paravirtualized master's guid is guid 0 -- does not change */
+ if (!mlx4_is_master(dev->dev))
+ mlx4_ib_dispatch_event(dev, port_num,
+ IB_EVENT_GID_CHANGE);
break;
default:
break;
@@ -487,7 +489,9 @@ void handle_port_mgmt_change_event(struct work_struct *work)
mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE);
break;
case MLX4_DEV_PMC_SUBTYPE_GUID_INFO:
- mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
+ /* paravirtualized master's guid is guid 0 -- does not change */
+ if (!mlx4_is_master(dev->dev))
+ mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
break;
default:
pr_warn("Unsupported subtype 0x%x for "