netdev - Re: [PATCH net-next 3/7] net/rds: Wait for the FRMR_IS_FREE (or FRMR_IS_STALE) transition after posting IB_WR_LOCAL

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Date:   Mon, 1 Jul 2019 14:06:50 -0700
From:   Gerd Rausch <gerd.rausch@...cle.com>
To:     santosh.shilimkar@...cle.com, netdev@...r.kernel.org
Cc:     David Miller <davem@...emloft.net>
Subject: Re: [PATCH net-next 3/7] net/rds: Wait for the FRMR_IS_FREE (or
 FRMR_IS_STALE) transition after posting IB_WR_LOCAL_INV

Hi Santosh,

On 01/07/2019 14.00, santosh.shilimkar@...cle.com wrote:
>>
> Look for command timeout in CX3 sources. 60 second is upper bound in
> CX3. Its not standard in specs(at least not that I know) though
> and may vary from vendor to vendor.
> 

I am not seeing it. Can you point me to the right place?

% grep -ni timeout drivers/net/ethernet/mellanox/mlx4/*.[ch]
drivers/net/ethernet/mellanox/mlx4/cmd.c:116:	GO_BIT_TIMEOUT_MSECS	= 10000
[...]
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h:101:#define MLX4_EN_WATCHDOG_TIMEOUT	(15 * HZ)
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h:155:#define MLX4_EN_TX_POLL_TIMEOUT	(HZ / 4)
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h:171:#define MLX4_EN_LOOPBACK_TIMEOUT	100
[...]
drivers/net/ethernet/mellanox/mlx4/reset.c:61:#define MLX4_SEM_TIMEOUT_JIFFIES	(10 * HZ)
drivers/net/ethernet/mellanox/mlx4/reset.c:62:#define MLX4_RESET_TIMEOUT_JIFFIES	(2 * HZ)


% grep -i timeout drivers/infiniband/hw/mlx4/*.[ch] 
drivers/infiniband/hw/mlx4/cm.c:42:#define CM_CLEANUP_CACHE_TIMEOUT  (30 * HZ)
[...]
drivers/infiniband/hw/mlx4/mcg.c:46:#define MAD_TIMEOUT_MS	2000
[...]
drivers/infiniband/hw/mlx4/qp.c:4358:		while (wait_for_completion_timeout(&sdrain->done, HZ / 10) <= 0)

Thanks,

  Gerd