* [PATCH for-next] RDMA/hns: Remove MW support
@ 2025-06-05 2:49 Junxian Huang
2025-06-05 11:10 ` Zhu Yanjun
2025-06-12 8:23 ` Leon Romanovsky
0 siblings, 2 replies; 5+ messages in thread
From: Junxian Huang @ 2025-06-05 2:49 UTC (permalink / raw)
To: jgg, leon; +Cc: linux-rdma, linuxarm, huangjunxian6, tangchengchang
MW is no longer supported in hns. Delete relevant codes.
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
---
The corresponding rdma-core PR is:
https://github.com/linux-rdma/rdma-core/pull/1613
---
drivers/infiniband/hw/hns/hns_roce_device.h | 19 ----
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 41 +------
drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 8 --
drivers/infiniband/hw/hns/hns_roce_main.c | 10 --
drivers/infiniband/hw/hns/hns_roce_mr.c | 114 --------------------
5 files changed, 1 insertion(+), 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 fa8747656f25..761c184727a2 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 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
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)
--
2.33.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH for-next] RDMA/hns: Remove MW support
2025-06-05 2:49 [PATCH for-next] RDMA/hns: Remove MW support Junxian Huang
@ 2025-06-05 11:10 ` Zhu Yanjun
2025-06-05 13:34 ` Junxian Huang
2025-06-12 8:23 ` Leon Romanovsky
1 sibling, 1 reply; 5+ messages in thread
From: Zhu Yanjun @ 2025-06-05 11:10 UTC (permalink / raw)
To: Junxian Huang, jgg, leon; +Cc: linux-rdma, linuxarm, tangchengchang
On 05.06.25 04:49, Junxian Huang wrote:
> MW is no longer supported in hns. Delete relevant codes.
Is MW referring to "Memory Window"? A sub-concept of memory range in RDMA?
If so, why is MW no longer supported in HNS?
I'm just curious about this—I don’t mean to question the commit.
Zhu Yanjun
>
> Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
> ---
>
> The corresponding rdma-core PR is:
> https://github.com/linux-rdma/rdma-core/pull/1613
>
> ---
> drivers/infiniband/hw/hns/hns_roce_device.h | 19 ----
> drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 41 +------
> drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 8 --
> drivers/infiniband/hw/hns/hns_roce_main.c | 10 --
> drivers/infiniband/hw/hns/hns_roce_mr.c | 114 --------------------
> 5 files changed, 1 insertion(+), 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 fa8747656f25..761c184727a2 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 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
> 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)
> --
> 2.33.0
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH for-next] RDMA/hns: Remove MW support
2025-06-05 11:10 ` Zhu Yanjun
@ 2025-06-05 13:34 ` Junxian Huang
2025-06-05 14:50 ` Zhu Yanjun
0 siblings, 1 reply; 5+ messages in thread
From: Junxian Huang @ 2025-06-05 13:34 UTC (permalink / raw)
To: Zhu Yanjun, jgg, leon; +Cc: linux-rdma, linuxarm, tangchengchang
On 2025/6/5 19:10, Zhu Yanjun wrote:
> On 05.06.25 04:49, Junxian Huang wrote:
>> MW is no longer supported in hns. Delete relevant codes.
>
> Is MW referring to "Memory Window"? A sub-concept of memory range in RDMA?
Yes.
> If so, why is MW no longer supported in HNS?
Our HW doesn't fully implement MW, and we do not plan to improve it
for now. To avoid unnecessary problems, we decided to remove it from
driver.
Junxian
> I'm just curious about this—I don’t mean to question the commit.
>
> Zhu Yanjun
>
>>
>> Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
>> ---
>>
>> The corresponding rdma-core PR is:
>> https://github.com/linux-rdma/rdma-core/pull/1613
>>
>> ---
>> drivers/infiniband/hw/hns/hns_roce_device.h | 19 ----
>> drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 41 +------
>> drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 8 --
>> drivers/infiniband/hw/hns/hns_roce_main.c | 10 --
>> drivers/infiniband/hw/hns/hns_roce_mr.c | 114 --------------------
>> 5 files changed, 1 insertion(+), 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 fa8747656f25..761c184727a2 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 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
>> 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)
>> --
>> 2.33.0
>>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH for-next] RDMA/hns: Remove MW support
2025-06-05 13:34 ` Junxian Huang
@ 2025-06-05 14:50 ` Zhu Yanjun
0 siblings, 0 replies; 5+ messages in thread
From: Zhu Yanjun @ 2025-06-05 14:50 UTC (permalink / raw)
To: Junxian Huang, jgg, leon; +Cc: linux-rdma, linuxarm, tangchengchang
On 05.06.25 15:34, Junxian Huang wrote:
>
> On 2025/6/5 19:10, Zhu Yanjun wrote:
>> On 05.06.25 04:49, Junxian Huang wrote:
>>> MW is no longer supported in hns. Delete relevant codes.
>> Is MW referring to "Memory Window"? A sub-concept of memory range in RDMA?
> Yes.
>
>> If so, why is MW no longer supported in HNS?
> Our HW doesn't fully implement MW, and we do not plan to improve it
> for now. To avoid unnecessary problems, we decided to remove it from
> driver.
Thanks a lot.
I built this commit in my local hosts. It seems that it works very well.
I do not have your HW. So I can not make tests with this commit.
But I just looked through this commit. It looks very well.
Thus,
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Zhu Yanjun
> Junxian
>
>> I'm just curious about this—I don’t mean to question the commit.
>>
>> Zhu Yanjun
>>
>>> Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
>>> ---
>>>
>>> The corresponding rdma-core PR is:
>>> https://github.com/linux-rdma/rdma-core/pull/1613
>>>
>>> ---
>>> drivers/infiniband/hw/hns/hns_roce_device.h | 19 ----
>>> drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 41 +------
>>> drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 8 --
>>> drivers/infiniband/hw/hns/hns_roce_main.c | 10 --
>>> drivers/infiniband/hw/hns/hns_roce_mr.c | 114 --------------------
>>> 5 files changed, 1 insertion(+), 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 fa8747656f25..761c184727a2 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 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
>>> 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)
>>> --
>>> 2.33.0
>>>
--
Best Regards,
Yanjun.Zhu
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH for-next] RDMA/hns: Remove MW support
2025-06-05 2:49 [PATCH for-next] RDMA/hns: Remove MW support Junxian Huang
2025-06-05 11:10 ` Zhu Yanjun
@ 2025-06-12 8:23 ` Leon Romanovsky
1 sibling, 0 replies; 5+ messages in thread
From: Leon Romanovsky @ 2025-06-12 8:23 UTC (permalink / raw)
To: jgg, Junxian Huang; +Cc: linux-rdma, linuxarm, tangchengchang
On Thu, 05 Jun 2025 10:49:17 +0800, Junxian Huang wrote:
> MW is no longer supported in hns. Delete relevant codes.
>
>
Applied, thanks!
[1/1] RDMA/hns: Remove MW support
https://git.kernel.org/rdma/rdma/c/8f077ba91b593f
Best regards,
--
Leon Romanovsky <leon@kernel.org>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2025-06-12 8:23 UTC | newest]
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2025-06-05 2:49 [PATCH for-next] RDMA/hns: Remove MW support Junxian Huang
2025-06-05 11:10 ` Zhu Yanjun
2025-06-05 13:34 ` Junxian Huang
2025-06-05 14:50 ` Zhu Yanjun
2025-06-12 8:23 ` Leon Romanovsky
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