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IB/mlx4: Implement FMRs

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Implement FMRs for mlx4.  This is an adaptation of code from mthca.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Jack Morgenstein
2007-08-01 12:29:05 +03:00
committed by Roland Dreier
parent d7bb58fb1c
commit 8ad11fb6b0
5 changed files with 300 additions and 0 deletions
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93
drivers/infiniband/hw/mlx4/mr.c
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@ -181,3 +181,96 @@ int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
return 0;
}
struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
struct ib_fmr_attr *fmr_attr)
{
struct mlx4_ib_dev *dev = to_mdev(pd->device);
struct mlx4_ib_fmr *fmr;
int err = -ENOMEM;
fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
if (!fmr)
return ERR_PTR(-ENOMEM);
err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
fmr_attr->max_pages, fmr_attr->max_maps,
fmr_attr->page_shift, &fmr->mfmr);
if (err)
goto err_free;
err = mlx4_mr_enable(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
if (err)
goto err_mr;
fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
return &fmr->ibfmr;
err_mr:
mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
err_free:
kfree(fmr);
return ERR_PTR(err);
}
int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
int npages, u64 iova)
{
struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
&ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
}
int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
{
struct ib_fmr *ibfmr;
int err;
struct mlx4_dev *mdev = NULL;
list_for_each_entry(ibfmr, fmr_list, list) {
if (mdev && to_mdev(ibfmr->device)->dev != mdev)
return -EINVAL;
mdev = to_mdev(ibfmr->device)->dev;
}
if (!mdev)
return 0;
list_for_each_entry(ibfmr, fmr_list, list) {
struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
}
/*
* Make sure all MPT status updates are visible before issuing
* SYNC_TPT firmware command.
*/
wmb();
err = mlx4_SYNC_TPT(mdev);
if (err)
printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
"unmapping FMRs\n", err);
return 0;
}
int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
{
struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
int err;
err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
if (!err)
kfree(ifmr);
return err;
}