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IB/mlx5: Device memory mr registration support 

Adding mlx5_ib driver implementation for reg_dm_mr callback
which allows registering device memory (DM) as an MR for
local and remote access.

Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Ariel Levkovich 2018-04-05 18:53:29 +03:00 committed by Jason Gunthorpe
parent cdbd0d2bae
commit 6c29f57ea4
3 changed files with 84 additions and 0 deletions
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1
drivers/infiniband/hw/mlx5/main.c
View File

@ -5226,6 +5226,7 @@ int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
if (MLX5_CAP_DEV_MEM(mdev, memic)) {
dev->ib_dev.alloc_dm = mlx5_ib_alloc_dm;
dev->ib_dev.dealloc_dm = mlx5_ib_dealloc_dm;
dev->ib_dev.reg_dm_mr = mlx5_ib_reg_dm_mr;
}
dev->ib_dev.create_flow = mlx5_ib_create_flow;

9
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -540,6 +540,12 @@ struct mlx5_ib_dm {
#define MLX5_IB_MTT_PRESENT (MLX5_IB_MTT_READ | MLX5_IB_MTT_WRITE)
#define MLX5_IB_DM_ALLOWED_ACCESS (IB_ACCESS_LOCAL_WRITE |\
IB_ACCESS_REMOTE_WRITE |\
IB_ACCESS_REMOTE_READ |\
IB_ACCESS_REMOTE_ATOMIC |\
IB_ZERO_BASED)
struct mlx5_ib_mr {
struct ib_mr ibmr;
void *descs;
@ -1075,6 +1081,9 @@ struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev,
struct ib_dm_alloc_attr *attr,
struct uverbs_attr_bundle *attrs);
int mlx5_ib_dealloc_dm(struct ib_dm *ibdm);
struct ib_mr *mlx5_ib_reg_dm_mr(struct ib_pd *pd, struct ib_dm *dm,
struct ib_dm_mr_attr *attr,
struct uverbs_attr_bundle *attrs);
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
void mlx5_ib_internal_fill_odp_caps(struct mlx5_ib_dev *dev);

74
drivers/infiniband/hw/mlx5/mr.c
View File

@ -1229,6 +1229,80 @@ static void set_mr_fileds(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr,
mr->access_flags = access_flags;
}
static struct ib_mr *mlx5_ib_get_memic_mr(struct ib_pd *pd, u64 memic_addr,
u64 length, int acc)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
int inlen = MLX5_ST_SZ_BYTES(create_mkey_in);
struct mlx5_core_dev *mdev = dev->mdev;
struct mlx5_ib_mr *mr;
void *mkc;
u32 *in;
int err;
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
in = kzalloc(inlen, GFP_KERNEL);
if (!in) {
err = -ENOMEM;
goto err_free;
}
mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
MLX5_SET(mkc, mkc, access_mode_1_0, MLX5_MKC_ACCESS_MODE_MEMIC & 0x3);
MLX5_SET(mkc, mkc, access_mode_4_2,
(MLX5_MKC_ACCESS_MODE_MEMIC >> 2) & 0x7);
MLX5_SET(mkc, mkc, a, !!(acc & IB_ACCESS_REMOTE_ATOMIC));
MLX5_SET(mkc, mkc, rw, !!(acc & IB_ACCESS_REMOTE_WRITE));
MLX5_SET(mkc, mkc, rr, !!(acc & IB_ACCESS_REMOTE_READ));
MLX5_SET(mkc, mkc, lw, !!(acc & IB_ACCESS_LOCAL_WRITE));
MLX5_SET(mkc, mkc, lr, 1);
MLX5_SET64(mkc, mkc, len, length);
MLX5_SET(mkc, mkc, pd, to_mpd(pd)->pdn);
MLX5_SET(mkc, mkc, qpn, 0xffffff);
MLX5_SET64(mkc, mkc, start_addr,
memic_addr - pci_resource_start(dev->mdev->pdev, 0));
err = mlx5_core_create_mkey(mdev, &mr->mmkey, in, inlen);
if (err)
goto err_in;
kfree(in);
mr->umem = NULL;
set_mr_fileds(dev, mr, 0, length, acc);
return &mr->ibmr;
err_in:
kfree(in);
err_free:
kfree(mr);
return ERR_PTR(err);
}
struct ib_mr *mlx5_ib_reg_dm_mr(struct ib_pd *pd, struct ib_dm *dm,
struct ib_dm_mr_attr *attr,
struct uverbs_attr_bundle *attrs)
{
struct mlx5_ib_dm *mdm = to_mdm(dm);
u64 memic_addr;
if (attr->access_flags & ~MLX5_IB_DM_ALLOWED_ACCESS)
return ERR_PTR(-EINVAL);
memic_addr = mdm->dev_addr + attr->offset;
return mlx5_ib_get_memic_mr(pd, memic_addr, attr->length,
attr->access_flags);
}
struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt_addr, int access_flags,
struct ib_udata *udata)