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IB/mlx4: Do not attemp to report HCA clock offset on VFs 

mlx4 VFs can provide CQE raw time-stamping services, but they
don't have the hca core clock mapped to their PCI bars.

As such, we should not attempt to query and report the clock offset
to user space for VFs. Doing so causes query_device over VFs to fail
with -ENOSUPP.

Fixes: 4b664c4355 ('IB/mlx4: Add support for CQ time-stamping')
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
hifive-unleashed-5.1
Matan Barak 2015-07-01 14:31:02 +03:00 committed by Doug Ledford
parent be4b499323
commit 8a7ff14dcb
1 changed files with 6 additions and 5 deletions
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11
drivers/infiniband/hw/mlx4/main.c
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@ -253,14 +253,15 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
props->hca_core_clock = dev->dev->caps.hca_core_clock * 1000UL;
props->timestamp_mask = 0xFFFFFFFFFFFFULL;
err = mlx4_get_internal_clock_params(dev->dev, &clock_params);
if (err)
goto out;
if (!mlx4_is_slave(dev->dev))
err = mlx4_get_internal_clock_params(dev->dev, &clock_params);
if (uhw->outlen >= resp.response_length + sizeof(resp.hca_core_clock_offset)) {
resp.hca_core_clock_offset = clock_params.offset % PAGE_SIZE;
resp.response_length += sizeof(resp.hca_core_clock_offset);
resp.comp_mask |= QUERY_DEVICE_RESP_MASK_TIMESTAMP;
if (!err && !mlx4_is_slave(dev->dev)) {
resp.comp_mask |= QUERY_DEVICE_RESP_MASK_TIMESTAMP;
resp.hca_core_clock_offset = clock_params.offset % PAGE_SIZE;
}
}
if (uhw->outlen) {