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| author |   Devesh Sharma <devesh.sharma@broadcom.com> | 2017-06-29 12:28:16 -0700 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2017-07-20 11:20:50 -0400 |
| commit | 254cd2590d408f2c0375fbf73ef8250d47529e7b (patch) | |
| tree | 48f0a0954f92d87fd841f71f122dd486537d0c1f /drivers/infiniband/hw/bnxt_re/qplib_sp.c | |
| parent | RDMA/bnxt_re: Specify RDMA component when allocating stats context (diff) | |
| download | linux-dev-254cd2590d408f2c0375fbf73ef8250d47529e7b.tar.xz linux-dev-254cd2590d408f2c0375fbf73ef8250d47529e7b.zip | |
RDMA/bnxt_re: Enable atomics only if host bios supports
Driver shall check if the host system bios has enabled
Atomic operations capability in PCI Device Control 2
register of the pci-device. Expose the ATOMIC_HCA
flag only if the Atomic operations capability is set.
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/bnxt_re/qplib_sp.c')
| -rw-r--r-- | drivers/infiniband/hw/bnxt_re/qplib_sp.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c index 5827573875d4..ef91ab786dd4 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c @@ -51,6 +51,19 @@ const struct bnxt_qplib_gid bnxt_qplib_gid_zero = {{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }; /* Device */ + +static bool bnxt_qplib_is_atomic_cap(struct bnxt_qplib_rcfw *rcfw) +{ + int rc; + u16 pcie_ctl2; + + rc = pcie_capability_read_word(rcfw->pdev, PCI_EXP_DEVCTL2, + &pcie_ctl2); + if (rc) + return false; + return !!(pcie_ctl2 & PCI_EXP_DEVCTL2_ATOMIC_REQ); +} + int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw, struct bnxt_qplib_dev_attr *attr) { @@ -131,6 +144,7 @@ int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw, attr->tqm_alloc_reqs[i * 4 + 3] = *(++tqm_alloc); } + attr->is_atomic = bnxt_qplib_is_atomic_cap(rcfw); bail: bnxt_qplib_rcfw_free_sbuf(rcfw, sbuf); return rc; |