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mlx5: Implement create_mr and destroy_mr

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Support create_mr and destroy_mr verbs.  Creating ib_mr may be done
for either ib_mr that will register regular page lists like
alloc_fast_reg_mr routine, or indirect ib_mrs that can register other
(pre-registered) ib_mrs in an indirect manner.

In addition user may request signature enable, that will mean that the
created ib_mr may be attached with signature attributes (BSF, PSVs).

Currently we only allow direct/indirect registration modes.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sagi Grimberg
2014-02-23 14:19:06 +02:00
committed by Roland Dreier
parent 1b01d33560
commit 3121e3c441
6 changed files with 222 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/hw/mlx5/main.c
View File

@@ -1423,9 +1423,11 @@ static int init_one(struct pci_dev *pdev,
dev->ib_dev.get_dma_mr = mlx5_ib_get_dma_mr;
dev->ib_dev.reg_user_mr = mlx5_ib_reg_user_mr;
dev->ib_dev.dereg_mr = mlx5_ib_dereg_mr;
dev->ib_dev.destroy_mr = mlx5_ib_destroy_mr;
dev->ib_dev.attach_mcast = mlx5_ib_mcg_attach;
dev->ib_dev.detach_mcast = mlx5_ib_mcg_detach;
dev->ib_dev.process_mad = mlx5_ib_process_mad;
dev->ib_dev.create_mr = mlx5_ib_create_mr;
dev->ib_dev.alloc_fast_reg_mr = mlx5_ib_alloc_fast_reg_mr;
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;

4
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@@ -265,6 +265,7 @@ struct mlx5_ib_mr {
enum ib_wc_status status;
struct mlx5_ib_dev *dev;
struct mlx5_create_mkey_mbox_out out;
struct mlx5_core_sig_ctx *sig;
};
struct mlx5_ib_fast_reg_page_list {
@@ -495,6 +496,9 @@ 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);
int mlx5_ib_dereg_mr(struct ib_mr *ibmr);
int mlx5_ib_destroy_mr(struct ib_mr *ibmr);
struct ib_mr *mlx5_ib_create_mr(struct ib_pd *pd,
struct ib_mr_init_attr *mr_init_attr);
struct ib_mr *mlx5_ib_alloc_fast_reg_mr(struct ib_pd *pd,
int max_page_list_len);
struct ib_fast_reg_page_list *mlx5_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,

111
drivers/infiniband/hw/mlx5/mr.c
View File

@@ -992,6 +992,117 @@ int mlx5_ib_dereg_mr(struct ib_mr *ibmr)
return 0;
}
struct ib_mr *mlx5_ib_create_mr(struct ib_pd *pd,
struct ib_mr_init_attr *mr_init_attr)
{
struct mlx5_ib_dev *dev = to_mdev(pd->device);
struct mlx5_create_mkey_mbox_in *in;
struct mlx5_ib_mr *mr;
int access_mode, err;
int ndescs = roundup(mr_init_attr->max_reg_descriptors, 4);
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
in = kzalloc(sizeof(*in), GFP_KERNEL);
if (!in) {
err = -ENOMEM;
goto err_free;
}
in->seg.status = 1 << 6; /* free */
in->seg.xlt_oct_size = cpu_to_be32(ndescs);
in->seg.qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);
in->seg.flags_pd = cpu_to_be32(to_mpd(pd)->pdn);
access_mode = MLX5_ACCESS_MODE_MTT;
if (mr_init_attr->flags & IB_MR_SIGNATURE_EN) {
u32 psv_index[2];
in->seg.flags_pd = cpu_to_be32(be32_to_cpu(in->seg.flags_pd) |
MLX5_MKEY_BSF_EN);
in->seg.bsfs_octo_size = cpu_to_be32(MLX5_MKEY_BSF_OCTO_SIZE);
mr->sig = kzalloc(sizeof(*mr->sig), GFP_KERNEL);
if (!mr->sig) {
err = -ENOMEM;
goto err_free_in;
}
/* create mem & wire PSVs */
err = mlx5_core_create_psv(&dev->mdev, to_mpd(pd)->pdn,
2, psv_index);
if (err)
goto err_free_sig;
access_mode = MLX5_ACCESS_MODE_KLM;
mr->sig->psv_memory.psv_idx = psv_index[0];
mr->sig->psv_wire.psv_idx = psv_index[1];
}
in->seg.flags = MLX5_PERM_UMR_EN | access_mode;
err = mlx5_core_create_mkey(&dev->mdev, &mr->mmr, in, sizeof(*in),
NULL, NULL, NULL);
if (err)
goto err_destroy_psv;
mr->ibmr.lkey = mr->mmr.key;
mr->ibmr.rkey = mr->mmr.key;
mr->umem = NULL;
kfree(in);
return &mr->ibmr;
err_destroy_psv:
if (mr->sig) {
if (mlx5_core_destroy_psv(&dev->mdev,
mr->sig->psv_memory.psv_idx))
mlx5_ib_warn(dev, "failed to destroy mem psv %d\n",
mr->sig->psv_memory.psv_idx);
if (mlx5_core_destroy_psv(&dev->mdev,
mr->sig->psv_wire.psv_idx))
mlx5_ib_warn(dev, "failed to destroy wire psv %d\n",
mr->sig->psv_wire.psv_idx);
}
err_free_sig:
kfree(mr->sig);
err_free_in:
kfree(in);
err_free:
kfree(mr);
return ERR_PTR(err);
}
int mlx5_ib_destroy_mr(struct ib_mr *ibmr)
{
struct mlx5_ib_dev *dev = to_mdev(ibmr->device);
struct mlx5_ib_mr *mr = to_mmr(ibmr);
int err;
if (mr->sig) {
if (mlx5_core_destroy_psv(&dev->mdev,
mr->sig->psv_memory.psv_idx))
mlx5_ib_warn(dev, "failed to destroy mem psv %d\n",
mr->sig->psv_memory.psv_idx);
if (mlx5_core_destroy_psv(&dev->mdev,
mr->sig->psv_wire.psv_idx))
mlx5_ib_warn(dev, "failed to destroy wire psv %d\n",
mr->sig->psv_wire.psv_idx);
kfree(mr->sig);
}
err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr);
if (err) {
mlx5_ib_warn(dev, "failed to destroy mkey 0x%x (%d)\n",
mr->mmr.key, err);
return err;
}
kfree(mr);
return err;
}
struct ib_mr *mlx5_ib_alloc_fast_reg_mr(struct ib_pd *pd,
int max_page_list_len)
{