RDMA/mlx5: Remove unused IB_WR_REG_SIG_MR code

IB_WR_REG_SIG_MR is not needed after IB_WR_REG_MR_INTEGRITY
was used.
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/mlx5/mr.c

@@ -1760,8 +1760,7 @@ static struct ib_mr *__mlx5_ib_alloc_mr(struct ib_pd *pd,
 			goto err_free_in;
 		mr->desc_size = sizeof(struct mlx5_klm);
 		mr->max_descs = ndescs;
-	} else if (mr_type == IB_MR_TYPE_SIGNATURE ||
-		   mr_type == IB_MR_TYPE_INTEGRITY) {
+	} else if (mr_type == IB_MR_TYPE_INTEGRITY) {
 		u32 psv_index[2];
 
 		MLX5_SET(mkc, mkc, bsf_en, 1);
@@ -1787,14 +1786,12 @@ static struct ib_mr *__mlx5_ib_alloc_mr(struct ib_pd *pd,
 		mr->sig->sig_err_exists = false;
 		/* Next UMR, Arm SIGERR */
 		++mr->sig->sigerr_count;
-		if (mr_type == IB_MR_TYPE_INTEGRITY) {
 		mr->pi_mr = mlx5_ib_alloc_pi_mr(pd, max_num_sg,
 						max_num_meta_sg);
 		if (IS_ERR(mr->pi_mr)) {
 			err = PTR_ERR(mr->pi_mr);
 			goto err_destroy_psv;
 		}
-		}
 	} else {
 		mlx5_ib_warn(dev, "Invalid mr type %d\n", mr_type);
 		err = -EINVAL;

drivers/infiniband/hw/mlx5/qp.c

@@ -4557,20 +4557,6 @@ static int set_sig_data_segment(const struct ib_send_wr *send_wr,
 	bool prot = false;
 	int ret;
 	int wqe_size;
-
-	if (send_wr->opcode == IB_WR_REG_SIG_MR) {
-		const struct ib_sig_handover_wr *wr = sig_handover_wr(send_wr);
-
-		data_len = wr->wr.sg_list->length;
-		data_key = wr->wr.sg_list->lkey;
-		data_va = wr->wr.sg_list->addr;
-		if (wr->prot) {
-			prot_len = wr->prot->length;
-			prot_key = wr->prot->lkey;
-			prot_va = wr->prot->addr;
-			prot = true;
-		}
-	} else {
 	struct mlx5_ib_mr *mr = to_mmr(sig_mr);
 	struct mlx5_ib_mr *pi_mr = mr->pi_mr;
 
@@ -4583,7 +4569,6 @@ static int set_sig_data_segment(const struct ib_send_wr *send_wr,
 		prot_va = pi_mr->ibmr.iova + data_len;
 		prot = true;
 	}
-	}
 
 	if (!prot || (data_key == prot_key && data_va == prot_va &&
 		      data_len == prot_len)) {
@@ -4748,57 +4733,6 @@ static int set_pi_umr_wr(const struct ib_send_wr *send_wr,
 	return 0;
 }
 
-static int set_sig_umr_wr(const struct ib_send_wr *send_wr,
-			  struct mlx5_ib_qp *qp, void **seg, int *size,
-			  void **cur_edge)
-{
-	const struct ib_sig_handover_wr *wr = sig_handover_wr(send_wr);
-	struct mlx5_ib_mr *sig_mr = to_mmr(wr->sig_mr);
-	u32 pdn = get_pd(qp)->pdn;
-	u32 xlt_size;
-	int region_len, ret;
-
-	if (unlikely(wr->wr.num_sge != 1) ||
-	    unlikely(wr->access_flags & IB_ACCESS_REMOTE_ATOMIC) ||
-	    unlikely(!sig_mr->sig) || unlikely(!qp->ibqp.integrity_en) ||
-	    unlikely(!sig_mr->sig->sig_status_checked))
-		return -EINVAL;
-
-	/* length of the protected region, data + protection */
-	region_len = wr->wr.sg_list->length;
-	if (wr->prot &&
-	    (wr->prot->lkey != wr->wr.sg_list->lkey  ||
-	     wr->prot->addr != wr->wr.sg_list->addr  ||
-	     wr->prot->length != wr->wr.sg_list->length))
-		region_len += wr->prot->length;
-
-	/**
-	 * KLM octoword size - if protection was provided
-	 * then we use strided block format (3 octowords),
-	 * else we use single KLM (1 octoword)
-	 **/
-	xlt_size = wr->prot ? 0x30 : sizeof(struct mlx5_klm);
-
-	set_sig_umr_segment(*seg, xlt_size);
-	*seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
-	*size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
-	handle_post_send_edge(&qp->sq, seg, *size, cur_edge);
-
-	set_sig_mkey_segment(*seg, wr->sig_mr, wr->access_flags, xlt_size,
-			     region_len, pdn);
-	*seg += sizeof(struct mlx5_mkey_seg);
-	*size += sizeof(struct mlx5_mkey_seg) / 16;
-	handle_post_send_edge(&qp->sq, seg, *size, cur_edge);
-
-	ret = set_sig_data_segment(send_wr, wr->sig_mr, wr->sig_attrs, qp, seg,
-				   size, cur_edge);
-	if (ret)
-		return ret;
-
-	sig_mr->sig->sig_status_checked = false;
-	return 0;
-}
-
 static int set_psv_wr(struct ib_sig_domain *domain,
 		      u32 psv_idx, void **seg, int *size)
 {
@@ -5187,74 +5121,6 @@ static int _mlx5_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
 				num_sge = 0;
 				goto skip_psv;
 
-			case IB_WR_REG_SIG_MR:
-				qp->sq.wr_data[idx] = IB_WR_REG_SIG_MR;
-				mr = to_mmr(sig_handover_wr(wr)->sig_mr);
-
-				ctrl->imm = cpu_to_be32(mr->ibmr.rkey);
-				err = set_sig_umr_wr(wr, qp, &seg, &size,
-						     &cur_edge);
-				if (err) {
-					mlx5_ib_warn(dev, "\n");
-					*bad_wr = wr;
-					goto out;
-				}
-
-				finish_wqe(qp, ctrl, seg, size, cur_edge, idx,
-					   wr->wr_id, nreq, fence,
-					   MLX5_OPCODE_UMR);
-				/*
-				 * SET_PSV WQEs are not signaled and solicited
-				 * on error
-				 */
-				err = __begin_wqe(qp, &seg, &ctrl, wr, &idx,
-						  &size, &cur_edge, nreq, false,
-						  true);
-				if (err) {
-					mlx5_ib_warn(dev, "\n");
-					err = -ENOMEM;
-					*bad_wr = wr;
-					goto out;
-				}
-
-				err = set_psv_wr(&sig_handover_wr(wr)->sig_attrs->mem,
-						 mr->sig->psv_memory.psv_idx, &seg,
-						 &size);
-				if (err) {
-					mlx5_ib_warn(dev, "\n");
-					*bad_wr = wr;
-					goto out;
-				}
-
-				finish_wqe(qp, ctrl, seg, size, cur_edge, idx,
-					   wr->wr_id, nreq, fence,
-					   MLX5_OPCODE_SET_PSV);
-				err = __begin_wqe(qp, &seg, &ctrl, wr, &idx,
-						  &size, &cur_edge, nreq, false,
-						  true);
-				if (err) {
-					mlx5_ib_warn(dev, "\n");
-					err = -ENOMEM;
-					*bad_wr = wr;
-					goto out;
-				}
-
-				err = set_psv_wr(&sig_handover_wr(wr)->sig_attrs->wire,
-						 mr->sig->psv_wire.psv_idx, &seg,
-						 &size);
-				if (err) {
-					mlx5_ib_warn(dev, "\n");
-					*bad_wr = wr;
-					goto out;
-				}
-
-				finish_wqe(qp, ctrl, seg, size, cur_edge, idx,
-					   wr->wr_id, nreq, fence,
-					   MLX5_OPCODE_SET_PSV);
-				qp->next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
-				num_sge = 0;
-				goto skip_psv;
-
 			default:
 				break;
 			}

drivers/infiniband/hw/vmw_pvrdma/pvrdma.h

@@ -456,7 +456,7 @@ static inline enum pvrdma_wr_opcode ib_wr_opcode_to_pvrdma(enum ib_wr_opcode op)
 		return PVRDMA_WR_MASKED_ATOMIC_CMP_AND_SWP;
 	case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
 		return PVRDMA_WR_MASKED_ATOMIC_FETCH_AND_ADD;
-	case IB_WR_REG_SIG_MR:
+	case IB_WR_REG_MR_INTEGRITY:
 		return PVRDMA_WR_REG_SIG_MR;
 	default:
 		return PVRDMA_WR_ERROR;

include/rdma/ib_verbs.h

@@ -776,9 +776,6 @@ __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
  * enum ib_mr_type - memory region type
  * @IB_MR_TYPE_MEM_REG:       memory region that is used for
  *                            normal registration
- * @IB_MR_TYPE_SIGNATURE:     memory region that is used for
- *                            signature operations (data-integrity
- *                            capable regions)
  * @IB_MR_TYPE_SG_GAPS:       memory region that is capable to
  *                            register any arbitrary sg lists (without
  *                            the normal mr constraints - see
@@ -794,7 +791,6 @@ __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
  */
 enum ib_mr_type {
 	IB_MR_TYPE_MEM_REG,
-	IB_MR_TYPE_SIGNATURE,
 	IB_MR_TYPE_SG_GAPS,
 	IB_MR_TYPE_DM,
 	IB_MR_TYPE_USER,
@@ -1235,7 +1231,6 @@ enum ib_wr_opcode {
 
 	/* These are kernel only and can not be issued by userspace */
 	IB_WR_REG_MR = 0x20,
-	IB_WR_REG_SIG_MR,
 	IB_WR_REG_MR_INTEGRITY,
 
 	/* reserve values for low level drivers' internal use.
@@ -1346,20 +1341,6 @@ static inline const struct ib_reg_wr *reg_wr(const struct ib_send_wr *wr)
 	return container_of(wr, struct ib_reg_wr, wr);
 }
 
-struct ib_sig_handover_wr {
-	struct ib_send_wr	wr;
-	struct ib_sig_attrs    *sig_attrs;
-	struct ib_mr	       *sig_mr;
-	int			access_flags;
-	struct ib_sge	       *prot;
-};
-
-static inline const struct ib_sig_handover_wr *
-sig_handover_wr(const struct ib_send_wr *wr)
-{
-	return container_of(wr, struct ib_sig_handover_wr, wr);
-}
-
 struct ib_recv_wr {
 	struct ib_recv_wr      *next;
 	union {