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Commit 254cd259 authored by Devesh Sharma's avatar Devesh Sharma Committed by Doug Ledford
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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: default avatarDevesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: default avatarSelvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 536f0928

drivers/infiniband/hw/bnxt_re/ib_verbs.c

+4 −2
Original line number Diff line number Diff line
@@ -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;

	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;

drivers/infiniband/hw/bnxt_re/qplib_sp.c

+14 −0
Original line number Diff line number Diff line
@@ -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;

drivers/infiniband/hw/bnxt_re/qplib_sp.h

+3 −0
Original line number Diff line number Diff line
@@ -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 {