RDMA/bnxt_re: Update ABI to pass wqe-mode to user space

Changing ucontext ABI response structure to pass wqe_mode to user library.
A flag in comp_mask has been set to indicate presence of wqe_mode.

Moved wqe-mode ABI to uapi/rdma/bnxt_re-abi.h

Link: https://lore.kernel.org/r/20210616202817.1185276-1-devesh.sharma@broadcom.comSigned-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/bnxt_re/ib_verbs.c

@@ -3882,6 +3882,9 @@ int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata)
 	resp.max_cqd = dev_attr->max_cq_wqes;
 	resp.rsvd    = 0;
 
+	resp.comp_mask |= BNXT_RE_UCNTX_CMASK_HAVE_MODE;
+	resp.mode = rdev->chip_ctx->modes.wqe_mode;
+
 	rc = ib_copy_to_udata(udata, &resp, min(udata->outlen, sizeof(resp)));
 	if (rc) {
 		ibdev_err(ibdev, "Failed to copy user context");

drivers/infiniband/hw/bnxt_re/qplib_fp.h

@@ -39,6 +39,8 @@
 #ifndef __BNXT_QPLIB_FP_H__
 #define __BNXT_QPLIB_FP_H__
 
+#include <rdma/bnxt_re-abi.h>
+
 /* Few helper structures temporarily defined here
  * should get rid of these when roce_hsi.h is updated
  * in original code base

drivers/infiniband/hw/bnxt_re/qplib_res.h

@@ -45,12 +45,6 @@ extern const struct bnxt_qplib_gid bnxt_qplib_gid_zero;
 #define CHIP_NUM_57504		0x1751
 #define CHIP_NUM_57502		0x1752
 
-enum bnxt_qplib_wqe_mode {
-	BNXT_QPLIB_WQE_MODE_STATIC	= 0x00,
-	BNXT_QPLIB_WQE_MODE_VARIABLE	= 0x01,
-	BNXT_QPLIB_WQE_MODE_INVALID	= 0x02
-};
-
 struct bnxt_qplib_drv_modes {
 	u8	wqe_mode;
 	/* Other modes to follow here */

include/uapi/rdma/bnxt_re-abi.h

@@ -49,7 +49,14 @@
 #define BNXT_RE_CHIP_ID0_CHIP_MET_SFT		0x18
 
 enum {
-	BNXT_RE_UCNTX_CMASK_HAVE_CCTX = 0x1ULL
+	BNXT_RE_UCNTX_CMASK_HAVE_CCTX = 0x1ULL,
+	BNXT_RE_UCNTX_CMASK_HAVE_MODE = 0x02ULL,
+};
+
+enum bnxt_re_wqe_mode {
+	BNXT_QPLIB_WQE_MODE_STATIC	= 0x00,
+	BNXT_QPLIB_WQE_MODE_VARIABLE	= 0x01,
+	BNXT_QPLIB_WQE_MODE_INVALID	= 0x02,
 };
 
 struct bnxt_re_uctx_resp {
@@ -62,6 +69,8 @@ struct bnxt_re_uctx_resp {
 	__aligned_u64 comp_mask;
 	__u32 chip_id0;
 	__u32 chip_id1;
+	__u32 mode;
+	__u32 rsvd1; /* padding */
 };
 
 /*