User space verbs provider library would need chip context.
Changing the ABI to add chip version details in structure.
Furthermore, changing the kernel driver ucontext allocation
code to initialize the abi structure with appropriate values.
As suggested by community, appended the new fields at the
bottom of the ABI structure and retaining to older fields as
those were in the older versions.
Keeping the ABI version at 1 and adding a new field in the
ucontext response structure to hold the component mask.
The user space library should check pre-defined flags to
figure out if a certain feature is supported on not.
Signed-off-by: Devesh Sharma <devesh.sharma@xxxxxxxxxxxx>
---
drivers/infiniband/hw/bnxt_re/ib_verbs.c | 17 ++++++++++++++---
include/uapi/rdma/bnxt_re-abi.h | 11 +++++++++++
2 files changed, 25 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 08c1725..1d7469e 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -3692,9 +3692,10 @@ struct ib_ucontext *bnxt_re_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata)
{
struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
+ struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
struct bnxt_re_uctx_resp resp;
struct bnxt_re_ucontext *uctx;
- struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
+ u32 chip_met_rev_num = 0;
int rc;
dev_dbg(rdev_to_dev(rdev), "ABI version requested %d",
@@ -3719,14 +3720,24 @@ struct ib_ucontext *bnxt_re_alloc_ucontext(struct ib_device *ibdev,
}
spin_lock_init(&uctx->sh_lock);
- resp.dev_id = rdev->en_dev->pdev->devfn; /*Temp, Use idr_alloc instead*/
+ resp.comp_mask |= BNXT_RE_UCNTX_CMASK_HAVE_CCTX;
+ chip_met_rev_num = rdev->chip_ctx.chip_num;
+ chip_met_rev_num |= ((u32)rdev->chip_ctx.chip_rev & 0xFF) <<
+ BNXT_RE_CHIP_ID0_CHIP_REV_SFT;
+ chip_met_rev_num |= ((u32)rdev->chip_ctx.chip_metal & 0xFF) <<
+ BNXT_RE_CHIP_ID0_CHIP_MET_SFT;
+ resp.chip_id0 = chip_met_rev_num;
+ /* Future extension of chip info */
+ resp.chip_id1 = 0;
+ /*Temp, Use idr_alloc instead */
+ resp.dev_id = rdev->en_dev->pdev->devfn;
resp.max_qp = rdev->qplib_ctx.qpc_count;
resp.pg_size = PAGE_SIZE;
resp.cqe_sz = sizeof(struct cq_base);
resp.max_cqd = dev_attr->max_cq_wqes;
resp.rsvd = 0;
- rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
+ rc = ib_copy_to_udata(udata, &resp, min(udata->outlen, sizeof(resp)));
if (rc) {
dev_err(rdev_to_dev(rdev), "Failed to copy user context");
rc = -EFAULT;
diff --git a/include/uapi/rdma/bnxt_re-abi.h b/include/uapi/rdma/bnxt_re-abi.h
index a7a6111..dc52e3c 100644
--- a/include/uapi/rdma/bnxt_re-abi.h
+++ b/include/uapi/rdma/bnxt_re-abi.h
@@ -44,6 +44,14 @@
#define BNXT_RE_ABI_VERSION 1
+#define BNXT_RE_CHIP_ID0_CHIP_NUM_SFT 0x00
+#define BNXT_RE_CHIP_ID0_CHIP_REV_SFT 0x10
+#define BNXT_RE_CHIP_ID0_CHIP_MET_SFT 0x18
+
+enum {
+ BNXT_RE_UCNTX_CMASK_HAVE_CCTX = 0x1ULL
+};
+
struct bnxt_re_uctx_resp {
__u32 dev_id;
__u32 max_qp;
@@ -51,6 +59,9 @@ struct bnxt_re_uctx_resp {
__u32 cqe_sz;
__u32 max_cqd;
__u32 rsvd;
+ __aligned_u64 comp_mask;
+ __u32 chip_id0;
+ __u32 chip_id1;
};
/*
--
1.8.3.1
