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IB/mlx5: Fix micro UAR allocator

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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>
This commit is contained in:
Eli Cohen 2014-01-14 17:45:12 +02:00 • committed by Roland Dreier
parent 24e42754f6
commit c1be5232d2
3 changed files with 70 additions and 27 deletions
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7
include/linux/mlx5/device.h
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@ -104,9 +104,10 @@ enum {
};
enum {
MLX5_BF_REGS_PER_PAGE = 4,
MLX5_MAX_UAR_PAGES = 1 << 8,
MLX5_MAX_UUARS = MLX5_MAX_UAR_PAGES * MLX5_BF_REGS_PER_PAGE,
MLX5_BF_REGS_PER_PAGE = 4,
MLX5_MAX_UAR_PAGES = 1 << 8,
MLX5_NON_FP_BF_REGS_PER_PAGE = 2,
MLX5_MAX_UUARS = MLX5_MAX_UAR_PAGES * MLX5_NON_FP_BF_REGS_PER_PAGE,
};
enum {