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RDMA/bnxt_re: Refactor bnxt_re_create_cq()

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Some applications may allocate dmabuf based memory for CQs. To support
this, update the existing code to use SZ_4K to specify supported HW
page size for CQs, as we support only 4K pages for now.
Call ib_umem_find_best_pgsz() to ensure umem supports this requested
page size. A helper function includes these changes.

Link: https://patch.msgid.link/r/20260302110036.36387-5-sriharsha.basavapatna@broadcom.com
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Sriharsha Basavapatna
2026-03-02 16:30:34 +05:30
committed by Jason Gunthorpe
parent 1234a9d8ae
commit 3d4a42360c
1 changed files with 26 additions and 3 deletions
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29
drivers/infiniband/hw/bnxt_re/ib_verbs.c
View File

@@ -3349,6 +3349,26 @@ int bnxt_re_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
return ib_respond_empty_udata(udata);
}
static int bnxt_re_setup_sginfo(struct bnxt_re_dev *rdev,
struct ib_umem *umem,
struct bnxt_qplib_sg_info *sginfo)
{
unsigned long page_size;
if (!umem)
return -EINVAL;
page_size = ib_umem_find_best_pgsz(umem, SZ_4K, 0);
if (!page_size || page_size != SZ_4K)
return -EINVAL;
sginfo->umem = umem;
sginfo->npages = ib_umem_num_dma_blocks(umem, page_size);
sginfo->pgsize = page_size;
sginfo->pgshft = __builtin_ctz(page_size);
return 0;
}
int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
struct uverbs_attr_bundle *attrs)
{
@@ -3380,8 +3400,6 @@ int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
if (entries > dev_attr->max_cq_wqes + 1)
entries = dev_attr->max_cq_wqes + 1;
cq->qplib_cq.sg_info.pgsize = PAGE_SIZE;
cq->qplib_cq.sg_info.pgshft = PAGE_SHIFT;
if (udata) {
struct bnxt_re_cq_req req;
@@ -3396,7 +3414,10 @@ int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
rc = PTR_ERR(cq->umem);
goto fail;
}
cq->qplib_cq.sg_info.umem = cq->umem;
rc = bnxt_re_setup_sginfo(rdev, cq->umem, &cq->qplib_cq.sg_info);
if (rc)
goto fail;
cq->qplib_cq.dpi = &uctx->dpi;
} else {
cq->max_cql = min_t(u32, entries, MAX_CQL_PER_POLL);
@@ -3406,6 +3427,8 @@ int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
goto fail;
}
cq->qplib_cq.sg_info.pgsize = SZ_4K;
cq->qplib_cq.sg_info.pgshft = __builtin_ctz(SZ_4K);
cq->qplib_cq.dpi = &rdev->dpi_privileged;
}
cq->qplib_cq.max_wqe = entries;