Support the new memory registration API by allocating a
private page list array in mlx5_ib_mr and populate it when
mlx5_ib_map_mr_sg is invoked. Also, support IB_WR_REG_MR
by setting the exact WQE as IB_WR_FAST_REG_MR, just take the
needed information from different places:
- page_size, iova, length, access flags (ib_mr)
- page array (mlx5_ib_mr)
- key (ib_reg_wr)
The IB_WR_FAST_REG_MR handlers will be removed later when
all the ULPs will be converted.
Signed-off-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/cq.c | 3 ++
drivers/infiniband/hw/mlx5/main.c | 1 +
drivers/infiniband/hw/mlx5/mlx5_ib.h | 8 ++++
drivers/infiniband/hw/mlx5/mr.c | 65 ++++++++++++++++++++++++++++
drivers/infiniband/hw/mlx5/qp.c | 83 ++++++++++++++++++++++++++++++++++++
5 files changed, 160 insertions(+)
diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 5c9eeea62805..90daf791d51d 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -108,6 +108,9 @@ static enum ib_wc_opcode get_umr_comp(struct mlx5_ib_wq *wq, int idx)
case IB_WR_LOCAL_INV:
return IB_WC_LOCAL_INV;
+ case IB_WR_REG_MR:
+ return IB_WC_REG_MR;
+
case IB_WR_FAST_REG_MR:
return IB_WC_FAST_REG_MR;
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 276d7824be8a..7ebce545daf1 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1432,6 +1432,7 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev)
dev->ib_dev.detach_mcast = mlx5_ib_mcg_detach;
dev->ib_dev.process_mad = mlx5_ib_process_mad;
dev->ib_dev.alloc_mr = mlx5_ib_alloc_mr;
+ dev->ib_dev.map_mr_sg = mlx5_ib_map_mr_sg;
dev->ib_dev.alloc_fast_reg_page_list = mlx5_ib_alloc_fast_reg_page_list;
dev->ib_dev.free_fast_reg_page_list = mlx5_ib_free_fast_reg_page_list;
dev->ib_dev.check_mr_status = mlx5_ib_check_mr_status;
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index 210f99877b0b..bc1853f8e67d 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -319,6 +319,11 @@ enum mlx5_ib_mtt_access_flags {
struct mlx5_ib_mr {
struct ib_mr ibmr;
+ void *descs;
+ dma_addr_t desc_map;
+ int ndescs;
+ int max_descs;
+ int desc_size;
struct mlx5_core_mr mmr;
struct ib_umem *umem;
struct mlx5_shared_mr_info *smr_info;
@@ -560,6 +565,9 @@ int mlx5_ib_dereg_mr(struct ib_mr *ibmr);
struct ib_mr *mlx5_ib_alloc_mr(struct ib_pd *pd,
enum ib_mr_type mr_type,
u32 max_num_sg);
+int mlx5_ib_map_mr_sg(struct ib_mr *ibmr,
+ struct scatterlist *sg,
+ unsigned int sg_nents);
struct ib_fast_reg_page_list *mlx5_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
int page_list_len);
void mlx5_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list);
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 6d8aac0c1748..2f3b648719da 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -1165,6 +1165,35 @@ error:
return err;
}
+static int
+mlx5_alloc_priv_descs(struct ib_device *device,
+ struct mlx5_ib_mr *mr,
+ int ndescs,
+ int desc_size)
+{
+ int size = ndescs * desc_size;
+
+ mr->descs = dma_alloc_coherent(device->dma_device, size,
+ &mr->desc_map, GFP_KERNEL);
+ if (!mr->descs)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void
+mlx5_free_priv_descs(struct mlx5_ib_mr *mr)
+{
+ struct ib_device *device = mr->ibmr.device;
+ int size = mr->max_descs * mr->desc_size;
+
+ if (mr->descs) {
+ dma_free_coherent(device->dma_device, size,
+ mr->descs, mr->desc_map);
+ mr->descs = NULL;
+ }
+}
+
static int clean_mr(struct mlx5_ib_mr *mr)
{
struct mlx5_ib_dev *dev = to_mdev(mr->ibmr.device);
@@ -1184,6 +1213,8 @@ static int clean_mr(struct mlx5_ib_mr *mr)
mr->sig = NULL;
}
+ mlx5_free_priv_descs(mr);
+
if (!umred) {
err = destroy_mkey(dev, mr);
if (err) {
@@ -1273,6 +1304,14 @@ struct ib_mr *mlx5_ib_alloc_mr(struct ib_pd *pd,
if (mr_type == IB_MR_TYPE_MEM_REG) {
access_mode = MLX5_ACCESS_MODE_MTT;
in->seg.log2_page_size = PAGE_SHIFT;
+
+ err = mlx5_alloc_priv_descs(pd->device, mr,
+ ndescs, sizeof(u64));
+ if (err)
+ goto err_free_in;
+
+ mr->desc_size = sizeof(u64);
+ mr->max_descs = ndescs;
} else if (mr_type == IB_MR_TYPE_SIGNATURE) {
u32 psv_index[2];
@@ -1329,6 +1368,7 @@ err_destroy_psv:
mlx5_ib_warn(dev, "failed to destroy wire psv %d\n",
mr->sig->psv_wire.psv_idx);
}
+ mlx5_free_priv_descs(mr);
err_free_sig:
kfree(mr->sig);
err_free_in:
@@ -1420,3 +1460,28 @@ int mlx5_ib_check_mr_status(struct ib_mr *ibmr, u32 check_mask,
done:
return ret;
}
+
+static int mlx5_set_page(struct ib_mr *ibmr, u64 addr)
+{
+ struct mlx5_ib_mr *mr = to_mmr(ibmr);
+ __be64 *descs;
+
+ if (unlikely(mr->ndescs == mr->max_descs))
+ return -ENOMEM;
+
+ descs = mr->descs;
+ descs[mr->ndescs++] = cpu_to_be64(addr | MLX5_EN_RD | MLX5_EN_WR);
+
+ return 0;
+}
+
+int mlx5_ib_map_mr_sg(struct ib_mr *ibmr,
+ struct scatterlist *sg,
+ unsigned int sg_nents)
+{
+ struct mlx5_ib_mr *mr = to_mmr(ibmr);
+
+ mr->ndescs = 0;
+
+ return ib_sg_to_pages(ibmr, sg, sg_nents, mlx5_set_page);
+}
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index dcd8d58f95e1..61d3aa9a6ca9 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -65,6 +65,7 @@ static const u32 mlx5_ib_opcode[] = {
[IB_WR_SEND_WITH_INV] = MLX5_OPCODE_SEND_INVAL,
[IB_WR_LOCAL_INV] = MLX5_OPCODE_UMR,
[IB_WR_FAST_REG_MR] = MLX5_OPCODE_UMR,
+ [IB_WR_REG_MR] = MLX5_OPCODE_UMR,
[IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_MASKED_CS,
[IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_MASKED_FA,
[MLX5_IB_WR_UMR] = MLX5_OPCODE_UMR,
@@ -1901,6 +1902,17 @@ static __be64 sig_mkey_mask(void)
return cpu_to_be64(result);
}
+static void set_reg_umr_seg(struct mlx5_wqe_umr_ctrl_seg *umr,
+ struct mlx5_ib_mr *mr)
+{
+ int ndescs = mr->ndescs;
+
+ memset(umr, 0, sizeof(*umr));
+ umr->flags = MLX5_UMR_CHECK_NOT_FREE;
+ umr->klm_octowords = get_klm_octo(ndescs);
+ umr->mkey_mask = frwr_mkey_mask();
+}
+
static void set_frwr_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr,
struct ib_send_wr *wr, int li)
{
@@ -1992,6 +2004,22 @@ static u8 get_umr_flags(int acc)
MLX5_PERM_LOCAL_READ | MLX5_PERM_UMR_EN;
}
+static void set_reg_mkey_seg(struct mlx5_mkey_seg *seg,
+ struct mlx5_ib_mr *mr,
+ u32 key, int access)
+{
+ int ndescs = ALIGN(mr->ndescs, 8) >> 1;
+
+ memset(seg, 0, sizeof(*seg));
+ seg->flags = get_umr_flags(access) | MLX5_ACCESS_MODE_MTT;
+ seg->qpn_mkey7_0 = cpu_to_be32((key & 0xff) | 0xffffff00);
+ seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL);
+ seg->start_addr = cpu_to_be64(mr->ibmr.iova);
+ seg->len = cpu_to_be64(mr->ibmr.length);
+ seg->xlt_oct_size = cpu_to_be32(ndescs);
+ seg->log2_page_size = ilog2(mr->ibmr.page_size);
+}
+
static void set_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr,
int li, int *writ)
{
@@ -2033,6 +2061,17 @@ static void set_reg_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *w
mlx5_mkey_variant(umrwr->mkey));
}
+static void set_reg_data_seg(struct mlx5_wqe_data_seg *dseg,
+ struct mlx5_ib_mr *mr,
+ struct mlx5_ib_pd *pd)
+{
+ int bcount = mr->desc_size * mr->ndescs;
+
+ dseg->addr = cpu_to_be64(mr->desc_map);
+ dseg->byte_count = cpu_to_be32(ALIGN(bcount, 64));
+ dseg->lkey = cpu_to_be32(pd->ibpd.local_dma_lkey);
+}
+
static void set_frwr_pages(struct mlx5_wqe_data_seg *dseg,
struct ib_send_wr *wr,
struct mlx5_core_dev *mdev,
@@ -2438,6 +2477,38 @@ static int set_psv_wr(struct ib_sig_domain *domain,
return 0;
}
+static int set_reg_wr(struct mlx5_ib_qp *qp,
+ struct ib_reg_wr *wr,
+ void **seg, int *size)
+{
+ struct mlx5_ib_mr *mr = to_mmr(wr->mr);
+ struct mlx5_ib_pd *pd = to_mpd(qp->ibqp.pd);
+
+ if (unlikely(wr->wr.send_flags & IB_SEND_INLINE)) {
+ mlx5_ib_warn(to_mdev(qp->ibqp.device),
+ "Invalid IB_SEND_INLINE send flag\n");
+ return -EINVAL;
+ }
+
+ set_reg_umr_seg(*seg, mr);
+ *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
+ *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
+ if (unlikely((*seg == qp->sq.qend)))
+ *seg = mlx5_get_send_wqe(qp, 0);
+
+ set_reg_mkey_seg(*seg, mr, wr->key, wr->access);
+ *seg += sizeof(struct mlx5_mkey_seg);
+ *size += sizeof(struct mlx5_mkey_seg) / 16;
+ if (unlikely((*seg == qp->sq.qend)))
+ *seg = mlx5_get_send_wqe(qp, 0);
+
+ set_reg_data_seg(*seg, mr, pd);
+ *seg += sizeof(struct mlx5_wqe_data_seg);
+ *size += (sizeof(struct mlx5_wqe_data_seg) / 16);
+
+ return 0;
+}
+
static int set_frwr_li_wr(void **seg, struct ib_send_wr *wr, int *size,
struct mlx5_core_dev *mdev, struct mlx5_ib_pd *pd, struct mlx5_ib_qp *qp)
{
@@ -2680,6 +2751,18 @@ int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
num_sge = 0;
break;
+ case IB_WR_REG_MR:
+ next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
+ qp->sq.wr_data[idx] = IB_WR_REG_MR;
+ ctrl->imm = cpu_to_be32(reg_wr(wr)->key);
+ err = set_reg_wr(qp, reg_wr(wr), &seg, &size);
+ if (err) {
+ *bad_wr = wr;
+ goto out;
+ }
+ num_sge = 0;
+ break;
+
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);
--
1.8.4.3
--
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