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RDMA/bnxt_re: Enable atomics only if host bios supports

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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>
This commit is contained in:
Devesh Sharma 2017-06-29 12:28:16 -07:00 committed by Doug Ledford
parent 536f092805
commit 254cd2590d
3 changed files with 21 additions and 2 deletions
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6
drivers/infiniband/hw/bnxt_re/ib_verbs.c
View File

@ -173,8 +173,10 @@ int bnxt_re_query_device(struct ib_device *ibdev,
ib_attr->max_pd = dev_attr->max_pd;
ib_attr->max_qp_rd_atom = dev_attr->max_qp_rd_atom;
ib_attr->max_qp_init_rd_atom = dev_attr->max_qp_init_rd_atom;
ib_attr->atomic_cap = IB_ATOMIC_HCA;
ib_attr->masked_atomic_cap = IB_ATOMIC_HCA;
if (dev_attr->is_atomic) {
ib_attr->atomic_cap = IB_ATOMIC_HCA;
ib_attr->masked_atomic_cap = IB_ATOMIC_HCA;
}
ib_attr->max_ee_rd_atom = 0;
ib_attr->max_res_rd_atom = 0;

14
drivers/infiniband/hw/bnxt_re/qplib_sp.c
View File

@ -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;

3
drivers/infiniband/hw/bnxt_re/qplib_sp.h
View File

@ -42,6 +42,8 @@
#define BNXT_QPLIB_RESERVED_QP_WRS 128
#define PCI_EXP_DEVCTL2_ATOMIC_REQ 0x0040
struct bnxt_qplib_dev_attr {
char fw_ver[32];
u16 max_sgid;
@ -70,6 +72,7 @@ struct bnxt_qplib_dev_attr {
u32 max_inline_data;
u32 l2_db_size;
u8 tqm_alloc_reqs[MAX_TQM_ALLOC_REQ];
bool is_atomic;
};
struct bnxt_qplib_pd {