>From 9652f29170c7daabf2e9a62acb848a05dc71db9a Mon Sep 17 00:00:00 2001 From: Vu Pham <[email protected]> Date: Tue, 10 Aug 2010 14:16:50 -0700 Subject: [PATCH 04/10] mlx4_core: Add interface to allocate fmr with pre-reserved MPTs
As we did with MRs, the fmr_alloc() will call mr_alloc() to allocate bitmap and create MPTs entry. fmr_alloc_reserver will call mr_alloc_reserve() to create MPTs entry with pre-reserved range Signed-off-by: Oren Duer <[email protected]> Signed-off-by: Vu Pham <[email protected]> --- drivers/net/mlx4/mr.c | 55 +++++++++++++++++++++++++++++++++++++++++++ include/linux/mlx4/device.h | 4 +++ 2 files changed, 59 insertions(+), 0 deletions(-) diff --git a/drivers/net/mlx4/mr.c b/drivers/net/mlx4/mr.c index ba0514d..67d858f 100644 --- a/drivers/net/mlx4/mr.c +++ b/drivers/net/mlx4/mr.c @@ -655,6 +655,49 @@ err_free: } EXPORT_SYMBOL_GPL(mlx4_fmr_alloc); +int mlx4_fmr_alloc_reserved(struct mlx4_dev *dev, u32 mridx, + u32 pd, u32 access, int max_pages, + int max_maps, u8 page_shift, struct mlx4_fmr *fmr) +{ + struct mlx4_priv *priv = mlx4_priv(dev); + u64 mtt_seg; + int err = -ENOMEM; + + if (page_shift < (ffs(dev->caps.page_size_cap) - 1) || page_shift >= 32) + return -EINVAL; + + /* All MTTs must fit in the same page */ + if (max_pages * sizeof *fmr->mtts > PAGE_SIZE) + return -EINVAL; + + fmr->page_shift = page_shift; + fmr->max_pages = max_pages; + fmr->max_maps = max_maps; + fmr->maps = 0; + + err = mlx4_mr_alloc_reserved(dev, mridx, pd, 0, 0, access, max_pages, + page_shift, &fmr->mr); + if (err) + return err; + + mtt_seg = fmr->mr.mtt.first_seg * dev->caps.mtt_entry_sz; + + fmr->mtts = mlx4_table_find(&priv->mr_table.mtt_table, + fmr->mr.mtt.first_seg, + &fmr->dma_handle); + if (!fmr->mtts) { + err = -ENOMEM; + goto err_free; + } + + return 0; + +err_free: + mlx4_mr_free_reserved(dev, &fmr->mr); + return err; +} +EXPORT_SYMBOL_GPL(mlx4_fmr_alloc_reserved); + int mlx4_fmr_enable(struct mlx4_dev *dev, struct mlx4_fmr *fmr) { struct mlx4_priv *priv = mlx4_priv(dev); @@ -697,6 +740,18 @@ int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr) } EXPORT_SYMBOL_GPL(mlx4_fmr_free); +int mlx4_fmr_free_reserved(struct mlx4_dev *dev, struct mlx4_fmr *fmr) +{ + if (fmr->maps) + return -EBUSY; + + fmr->mr.enabled = 0; + mlx4_mr_free_reserved(dev, &fmr->mr); + + return 0; +} +EXPORT_SYMBOL_GPL(mlx4_fmr_free_reserved); + int mlx4_SYNC_TPT(struct mlx4_dev *dev) { return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_SYNC_TPT, 1000); diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index da8ab85..3960033 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -474,11 +474,15 @@ void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index); int mlx4_map_phys_fmr(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u64 *page_list, int npages, u64 iova, u32 *lkey, u32 *rkey); +int mlx4_fmr_alloc_reserved(struct mlx4_dev *dev, u32 mridx, u32 pd, + u32 access, int max_pages, int max_maps, + u8 page_shift, struct mlx4_fmr *fmr); int mlx4_fmr_alloc(struct mlx4_dev *dev, u32 pd, u32 access, int max_pages, int max_maps, u8 page_shift, struct mlx4_fmr *fmr); int mlx4_fmr_enable(struct mlx4_dev *dev, struct mlx4_fmr *fmr); void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u32 *lkey, u32 *rkey); +int mlx4_fmr_free_reserved(struct mlx4_dev *dev, struct mlx4_fmr *fmr); int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr); int mlx4_SYNC_TPT(struct mlx4_dev *dev); -- 1.6.3.3
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