On 2/28/2017 12:45 PM, Yishai Hadas wrote:
From: Eli Cohen <eli@xxxxxxxxxxxx> The hardware allows now to use UARs with a fixed size of 4KB. To enable this feature we need both firmware and driver to support this feature in order to make benefit of this. Benefit is obtained when the system page size is larger than 4KB, like power pc. In order to support compatbility between any version of library/driver/firmware we add a flags field to struct mlx5_alloc_ucontext to notify the kernel driver whether this is a new library that supports 4KB UARs. In response, the kernel driver will return log_uar_size and number of UARs in a page. We also make order in the terms used. So a "page" now refers to a system page, "uar" refers to the 4KB UAR area and "uuar" or micro uar refers to the section in the device registers that is used for posting doorbells. In case of larger page sizes, we will try to assign more lockless uuars and preserve the number of medium latency uuars. Signed-off-by: Eli Cohen <eli@xxxxxxxxxxxx> Reviewed-by: Yishai Hadas <yishaih@xxxxxxxxxxxx> --- Pull request was sent: https://github.com/linux-rdma/rdma-core/pull/85 providers/mlx5/mlx5-abi.h | 17 +++++-- providers/mlx5/mlx5.c | 127 ++++++++++++++++++++++++++++++++-------------- providers/mlx5/mlx5.h | 8 ++- 3 files changed, 108 insertions(+), 44 deletions(-) diff --git a/providers/mlx5/mlx5-abi.h b/providers/mlx5/mlx5-abi.h index 272d14e..5d10486 100644 --- a/providers/mlx5/mlx5-abi.h +++ b/providers/mlx5/mlx5-abi.h @@ -48,10 +48,16 @@ enum { };
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