RDMA/hns: Remove MW support

MW is no longer supported in hns. Delete relevant codes.

Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20250605024917.1132393-1-huangjunxian6@hisilicon.com
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

5 files changed, 1 insertions, 191 deletions

diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index 1dcc9cbb4678..40dcf77e2d92 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -316,16 +316,6 @@ struct hns_roce_mtr {
 	struct hns_roce_hem_cfg  hem_cfg; /* config for hardware addressing */
 };
 
-struct hns_roce_mw {
-	struct ib_mw		ibmw;
-	u32			pdn;
-	u32			rkey;
-	int			enabled; /* MW's active status */
-	u32			pbl_hop_num;
-	u32			pbl_ba_pg_sz;
-	u32			pbl_buf_pg_sz;
-};
-
 struct hns_roce_mr {
 	struct ib_mr		ibmr;
 	u64			iova; /* MR's virtual original addr */
@@ -933,7 +923,6 @@ struct hns_roce_hw {
 				struct hns_roce_mr *mr, int flags,
 				void *mb_buf);
 	int (*frmr_write_mtpt)(void *mb_buf, struct hns_roce_mr *mr);
-	int (*mw_write_mtpt)(void *mb_buf, struct hns_roce_mw *mw);
 	void (*write_cqc)(struct hns_roce_dev *hr_dev,
 			  struct hns_roce_cq *hr_cq, void *mb_buf, u64 *mtts,
 			  dma_addr_t dma_handle);
@@ -1078,11 +1067,6 @@ static inline struct hns_roce_mr *to_hr_mr(struct ib_mr *ibmr)
 	return container_of(ibmr, struct hns_roce_mr, ibmr);
 }
 
-static inline struct hns_roce_mw *to_hr_mw(struct ib_mw *ibmw)
-{
-	return container_of(ibmw, struct hns_roce_mw, ibmw);
-}
-
 static inline struct hns_roce_qp *to_hr_qp(struct ib_qp *ibqp)
 {
 	return container_of(ibqp, struct hns_roce_qp, ibqp);
@@ -1246,9 +1230,6 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
 int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata);
 unsigned long key_to_hw_index(u32 key);
 
-int hns_roce_alloc_mw(struct ib_mw *mw, struct ib_udata *udata);
-int hns_roce_dealloc_mw(struct ib_mw *ibmw);
-
 void hns_roce_buf_free(struct hns_roce_dev *hr_dev, struct hns_roce_buf *buf);
 struct hns_roce_buf *hns_roce_buf_alloc(struct hns_roce_dev *hr_dev, u32 size,
 					u32 page_shift, u32 flags);
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 764404017ee4..3e1189f456b9 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -144,7 +144,7 @@ static void set_frmr_seg(struct hns_roce_v2_rc_send_wqe *rc_sq_wqe,
 	u64 pbl_ba;
 
 	/* use ib_access_flags */
-	hr_reg_write_bool(fseg, FRMR_BIND_EN, wr->access & IB_ACCESS_MW_BIND);
+	hr_reg_write_bool(fseg, FRMR_BIND_EN, 0);
 	hr_reg_write_bool(fseg, FRMR_ATOMIC,
 			  wr->access & IB_ACCESS_REMOTE_ATOMIC);
 	hr_reg_write_bool(fseg, FRMR_RR, wr->access & IB_ACCESS_REMOTE_READ);
@@ -3313,8 +3313,6 @@ static int hns_roce_v2_write_mtpt(struct hns_roce_dev *hr_dev,
 	hr_reg_write(mpt_entry, MPT_ST, V2_MPT_ST_VALID);
 	hr_reg_write(mpt_entry, MPT_PD, mr->pd);
 
-	hr_reg_write_bool(mpt_entry, MPT_BIND_EN,
-			  mr->access & IB_ACCESS_MW_BIND);
 	hr_reg_write_bool(mpt_entry, MPT_ATOMIC_EN,
 			  mr->access & IB_ACCESS_REMOTE_ATOMIC);
 	hr_reg_write_bool(mpt_entry, MPT_RR_EN,
@@ -3358,8 +3356,6 @@ static int hns_roce_v2_rereg_write_mtpt(struct hns_roce_dev *hr_dev,
 	hr_reg_write(mpt_entry, MPT_PD, mr->pd);
 
 	if (flags & IB_MR_REREG_ACCESS) {
-		hr_reg_write(mpt_entry, MPT_BIND_EN,
-			     (mr_access_flags & IB_ACCESS_MW_BIND ? 1 : 0));
 		hr_reg_write(mpt_entry, MPT_ATOMIC_EN,
 			     mr_access_flags & IB_ACCESS_REMOTE_ATOMIC ? 1 : 0);
 		hr_reg_write(mpt_entry, MPT_RR_EN,
@@ -3397,7 +3393,6 @@ static int hns_roce_v2_frmr_write_mtpt(void *mb_buf, struct hns_roce_mr *mr)
 	hr_reg_enable(mpt_entry, MPT_R_INV_EN);
 
 	hr_reg_enable(mpt_entry, MPT_FRE);
-	hr_reg_clear(mpt_entry, MPT_MR_MW);
 	hr_reg_enable(mpt_entry, MPT_BPD);
 	hr_reg_clear(mpt_entry, MPT_PA);
 
@@ -3417,38 +3412,6 @@ static int hns_roce_v2_frmr_write_mtpt(void *mb_buf, struct hns_roce_mr *mr)
 	return 0;
 }
 
-static int hns_roce_v2_mw_write_mtpt(void *mb_buf, struct hns_roce_mw *mw)
-{
-	struct hns_roce_v2_mpt_entry *mpt_entry;
-
-	mpt_entry = mb_buf;
-	memset(mpt_entry, 0, sizeof(*mpt_entry));
-
-	hr_reg_write(mpt_entry, MPT_ST, V2_MPT_ST_FREE);
-	hr_reg_write(mpt_entry, MPT_PD, mw->pdn);
-
-	hr_reg_enable(mpt_entry, MPT_R_INV_EN);
-	hr_reg_enable(mpt_entry, MPT_LW_EN);
-
-	hr_reg_enable(mpt_entry, MPT_MR_MW);
-	hr_reg_enable(mpt_entry, MPT_BPD);
-	hr_reg_clear(mpt_entry, MPT_PA);
-	hr_reg_write(mpt_entry, MPT_BQP,
-		     mw->ibmw.type == IB_MW_TYPE_1 ? 0 : 1);
-
-	mpt_entry->lkey = cpu_to_le32(mw->rkey);
-
-	hr_reg_write(mpt_entry, MPT_PBL_HOP_NUM,
-		     mw->pbl_hop_num == HNS_ROCE_HOP_NUM_0 ? 0 :
-							     mw->pbl_hop_num);
-	hr_reg_write(mpt_entry, MPT_PBL_BA_PG_SZ,
-		     mw->pbl_ba_pg_sz + PG_SHIFT_OFFSET);
-	hr_reg_write(mpt_entry, MPT_PBL_BUF_PG_SZ,
-		     mw->pbl_buf_pg_sz + PG_SHIFT_OFFSET);
-
-	return 0;
-}
-
 static int free_mr_post_send_lp_wqe(struct hns_roce_qp *hr_qp)
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(hr_qp->ibqp.device);
@@ -3849,7 +3812,6 @@ static const u32 wc_send_op_map[] = {
 	HR_WC_OP_MAP(ATOM_MSK_CMP_AND_SWAP,	MASKED_COMP_SWAP),
 	HR_WC_OP_MAP(ATOM_MSK_FETCH_AND_ADD,	MASKED_FETCH_ADD),
 	HR_WC_OP_MAP(FAST_REG_PMR,		REG_MR),
-	HR_WC_OP_MAP(BIND_MW,			REG_MR),
 };
 
 static int to_ib_wc_send_op(u32 hr_opcode)
@@ -6948,7 +6910,6 @@ static const struct hns_roce_hw hns_roce_hw_v2 = {
 	.write_mtpt = hns_roce_v2_write_mtpt,
 	.rereg_write_mtpt = hns_roce_v2_rereg_write_mtpt,
 	.frmr_write_mtpt = hns_roce_v2_frmr_write_mtpt,
-	.mw_write_mtpt = hns_roce_v2_mw_write_mtpt,
 	.write_cqc = hns_roce_v2_write_cqc,
 	.set_hem = hns_roce_v2_set_hem,
 	.clear_hem = hns_roce_v2_clear_hem,
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
index bc7466830eaf..be8ef8ddd422 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
@@ -814,24 +814,16 @@ struct hns_roce_v2_mpt_entry {
 
 #define V2_MPT_BYTE_8_LW_EN_S 7
 
-#define V2_MPT_BYTE_8_MW_CNT_S 8
-#define V2_MPT_BYTE_8_MW_CNT_M GENMASK(31, 8)
-
 #define V2_MPT_BYTE_12_FRE_S 0
 
 #define V2_MPT_BYTE_12_PA_S 1
 
-#define V2_MPT_BYTE_12_MR_MW_S 4
-
 #define V2_MPT_BYTE_12_BPD_S 5
 
 #define V2_MPT_BYTE_12_BQP_S 6
 
 #define V2_MPT_BYTE_12_INNER_PA_VLD_S 7
 
-#define V2_MPT_BYTE_12_MW_BIND_QPN_S 8
-#define V2_MPT_BYTE_12_MW_BIND_QPN_M GENMASK(31, 8)
-
 #define V2_MPT_BYTE_48_PBL_BA_H_S 0
 #define V2_MPT_BYTE_48_PBL_BA_H_M GENMASK(28, 0)
 
diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
index e7a497cc125c..55962653f214 100644
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -672,13 +672,6 @@ static const struct ib_device_ops hns_roce_dev_mr_ops = {
 	.rereg_user_mr = hns_roce_rereg_user_mr,
 };
 
-static const struct ib_device_ops hns_roce_dev_mw_ops = {
-	.alloc_mw = hns_roce_alloc_mw,
-	.dealloc_mw = hns_roce_dealloc_mw,
-
-	INIT_RDMA_OBJ_SIZE(ib_mw, hns_roce_mw, ibmw),
-};
-
 static const struct ib_device_ops hns_roce_dev_frmr_ops = {
 	.alloc_mr = hns_roce_alloc_mr,
 	.map_mr_sg = hns_roce_map_mr_sg,
@@ -732,9 +725,6 @@ static int hns_roce_register_device(struct hns_roce_dev *hr_dev)
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_REREG_MR)
 		ib_set_device_ops(ib_dev, &hns_roce_dev_mr_ops);
 
-	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_MW)
-		ib_set_device_ops(ib_dev, &hns_roce_dev_mw_ops);
-
 	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_FRMR)
 		ib_set_device_ops(ib_dev, &hns_roce_dev_frmr_ops);
 
diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c
index 93a48b41955b..ebef93559225 100644
--- a/drivers/infiniband/hw/hns/hns_roce_mr.c
+++ b/drivers/infiniband/hw/hns/hns_roce_mr.c
@@ -483,120 +483,6 @@ err_page_list:
 	return sg_num;
 }
 
-static void hns_roce_mw_free(struct hns_roce_dev *hr_dev,
-			     struct hns_roce_mw *mw)
-{
-	struct device *dev = hr_dev->dev;
-	int ret;
-
-	if (mw->enabled) {
-		ret = hns_roce_destroy_hw_ctx(hr_dev, HNS_ROCE_CMD_DESTROY_MPT,
-					      key_to_hw_index(mw->rkey) &
-					      (hr_dev->caps.num_mtpts - 1));
-		if (ret)
-			dev_warn(dev, "MW DESTROY_MPT failed (%d)\n", ret);
-
-		hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table,
-				   key_to_hw_index(mw->rkey));
-	}
-
-	ida_free(&hr_dev->mr_table.mtpt_ida.ida,
-		 (int)key_to_hw_index(mw->rkey));
-}
-
-static int hns_roce_mw_enable(struct hns_roce_dev *hr_dev,
-			      struct hns_roce_mw *mw)
-{
-	struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
-	struct hns_roce_cmd_mailbox *mailbox;
-	struct device *dev = hr_dev->dev;
-	unsigned long mtpt_idx = key_to_hw_index(mw->rkey);
-	int ret;
-
-	/* prepare HEM entry memory */
-	ret = hns_roce_table_get(hr_dev, &mr_table->mtpt_table, mtpt_idx);
-	if (ret)
-		return ret;
-
-	mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
-	if (IS_ERR(mailbox)) {
-		ret = PTR_ERR(mailbox);
-		goto err_table;
-	}
-
-	ret = hr_dev->hw->mw_write_mtpt(mailbox->buf, mw);
-	if (ret) {
-		dev_err(dev, "MW write mtpt fail!\n");
-		goto err_page;
-	}
-
-	ret = hns_roce_create_hw_ctx(hr_dev, mailbox, HNS_ROCE_CMD_CREATE_MPT,
-				     mtpt_idx & (hr_dev->caps.num_mtpts - 1));
-	if (ret) {
-		dev_err(dev, "MW CREATE_MPT failed (%d)\n", ret);
-		goto err_page;
-	}
-
-	mw->enabled = 1;
-
-	hns_roce_free_cmd_mailbox(hr_dev, mailbox);
-
-	return 0;
-
-err_page:
-	hns_roce_free_cmd_mailbox(hr_dev, mailbox);
-
-err_table:
-	hns_roce_table_put(hr_dev, &mr_table->mtpt_table, mtpt_idx);
-
-	return ret;
-}
-
-int hns_roce_alloc_mw(struct ib_mw *ibmw, struct ib_udata *udata)
-{
-	struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device);
-	struct hns_roce_ida *mtpt_ida = &hr_dev->mr_table.mtpt_ida;
-	struct ib_device *ibdev = &hr_dev->ib_dev;
-	struct hns_roce_mw *mw = to_hr_mw(ibmw);
-	int ret;
-	int id;
-
-	/* Allocate a key for mw from mr_table */
-	id = ida_alloc_range(&mtpt_ida->ida, mtpt_ida->min, mtpt_ida->max,
-			     GFP_KERNEL);
-	if (id < 0) {
-		ibdev_err(ibdev, "failed to alloc id for MW key, id(%d)\n", id);
-		return -ENOMEM;
-	}
-
-	mw->rkey = hw_index_to_key(id);
-
-	ibmw->rkey = mw->rkey;
-	mw->pdn = to_hr_pd(ibmw->pd)->pdn;
-	mw->pbl_hop_num = hr_dev->caps.pbl_hop_num;
-	mw->pbl_ba_pg_sz = hr_dev->caps.pbl_ba_pg_sz;
-	mw->pbl_buf_pg_sz = hr_dev->caps.pbl_buf_pg_sz;
-
-	ret = hns_roce_mw_enable(hr_dev, mw);
-	if (ret)
-		goto err_mw;
-
-	return 0;
-
-err_mw:
-	hns_roce_mw_free(hr_dev, mw);
-	return ret;
-}
-
-int hns_roce_dealloc_mw(struct ib_mw *ibmw)
-{
-	struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device);
-	struct hns_roce_mw *mw = to_hr_mw(ibmw);
-
-	hns_roce_mw_free(hr_dev, mw);
-	return 0;
-}
-
 static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 			  struct hns_roce_buf_region *region, dma_addr_t *pages,
 			  int max_count)