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| author |   Devesh Sharma <devesh.sharma@broadcom.com> | 2021-06-03 18:45:32 +0530 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2021-06-03 16:59:11 -0300 |
| commit | 35f5ace5dea4816f9a20746935a356132bf235ba (patch) | |
| tree | b7c1b25534b2d58037eed94b072ca25989763481 /drivers/infiniband/hw/bnxt_re/qplib_res.c | |
| parent | RDMA/rxe: Fix failure during driver load (diff) | |
| download | linux-dev-35f5ace5dea4816f9a20746935a356132bf235ba.tar.xz linux-dev-35f5ace5dea4816f9a20746935a356132bf235ba.zip | |
RDMA/bnxt_re: Enable global atomic ops if platform supports
Enabling Atomic operations for Gen P5 devices if the underlying platform
supports global atomic ops.
Link: https://lore.kernel.org/r/20210603131534.982257-2-devesh.sharma@broadcom.com
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/bnxt_re/qplib_res.c')
| -rw-r--r-- | drivers/infiniband/hw/bnxt_re/qplib_res.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c index 3ca47004b752..17f0701b3cee 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_res.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c @@ -959,3 +959,20 @@ fail: bnxt_qplib_free_res(res); return rc; } + +int bnxt_qplib_determine_atomics(struct pci_dev *dev) +{ + int comp; + u16 ctl2; + + comp = pci_enable_atomic_ops_to_root(dev, + PCI_EXP_DEVCAP2_ATOMIC_COMP32); + if (comp) + return -EOPNOTSUPP; + comp = pci_enable_atomic_ops_to_root(dev, + PCI_EXP_DEVCAP2_ATOMIC_COMP64); + if (comp) + return -EOPNOTSUPP; + pcie_capability_read_word(dev, PCI_EXP_DEVCTL2, &ctl2); + return !(ctl2 & PCI_EXP_DEVCTL2_ATOMIC_REQ); +} |