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| author |   Eli Cohen <eli@dev.mellanox.co.il> | 2014-01-14 17:45:12 +0200 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2014-01-14 13:54:23 -0800 |
| commit | c1be5232d21de68f46637e617225b9b7c586451a (patch) | |
| tree | ca552be072b1ec232a4ca7b1d3154fd6b5f4946f /drivers/infiniband/hw/mlx5/main.c | |
| parent | mlx5_core: Remove dead code (diff) | |
| download | linux-dev-c1be5232d21de68f46637e617225b9b7c586451a.tar.xz linux-dev-c1be5232d21de68f46637e617225b9b7c586451a.zip | |
IB/mlx5: Fix micro UAR allocator
The micro UAR (uuar) allocator had a bug which resulted from the fact
that in each UAR we only have two micro UARs avaialable, those at
index 0 and 1. This patch defines iterators to aid in traversing the
list of available micro UARs when allocating a uuar.
In addition, change the logic in create_user_qp() so that if high
class allocation fails (high class means lower latency), we revert to
medium class and not to the low class.
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/main.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 306534109627..9660d093f8cf 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -541,6 +541,7 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, struct mlx5_ib_ucontext *context; struct mlx5_uuar_info *uuari; struct mlx5_uar *uars; + int gross_uuars; int num_uars; int uuarn; int err; @@ -559,11 +560,13 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, if (req.total_num_uuars == 0) return ERR_PTR(-EINVAL); - req.total_num_uuars = ALIGN(req.total_num_uuars, MLX5_BF_REGS_PER_PAGE); + req.total_num_uuars = ALIGN(req.total_num_uuars, + MLX5_NON_FP_BF_REGS_PER_PAGE); if (req.num_low_latency_uuars > req.total_num_uuars - 1) return ERR_PTR(-EINVAL); - num_uars = req.total_num_uuars / MLX5_BF_REGS_PER_PAGE; + num_uars = req.total_num_uuars / MLX5_NON_FP_BF_REGS_PER_PAGE; + gross_uuars = num_uars * MLX5_BF_REGS_PER_PAGE; resp.qp_tab_size = 1 << dev->mdev.caps.log_max_qp; resp.bf_reg_size = dev->mdev.caps.bf_reg_size; resp.cache_line_size = L1_CACHE_BYTES; @@ -585,7 +588,7 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, goto out_ctx; } - uuari->bitmap = kcalloc(BITS_TO_LONGS(req.total_num_uuars), + uuari->bitmap = kcalloc(BITS_TO_LONGS(gross_uuars), sizeof(*uuari->bitmap), GFP_KERNEL); if (!uuari->bitmap) { @@ -595,13 +598,13 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, /* * clear all fast path uuars */ - for (i = 0; i < req.total_num_uuars; i++) { + for (i = 0; i < gross_uuars; i++) { uuarn = i & 3; if (uuarn == 2 || uuarn == 3) set_bit(i, uuari->bitmap); } - uuari->count = kcalloc(req.total_num_uuars, sizeof(*uuari->count), GFP_KERNEL); + uuari->count = kcalloc(gross_uuars, sizeof(*uuari->count), GFP_KERNEL); if (!uuari->count) { err = -ENOMEM; goto out_bitmap; |