linux-kernel - RE: [PATCH 07/22] NTB: Fix a few ntb.h issues

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Date:   Sat, 3 Dec 2016 19:06:20 -0500
From:   "Allen Hubbe" <Allen.Hubbe@...l.com>
To:     "'Serge Semin'" <fancer.lancer@...il.com>, <jdmason@...zu.us>,
        <dave.jiang@...el.com>, <Xiangliang.Yu@....com>
Cc:     <Sergey.Semin@...latforms.ru>, <linux-ntb@...glegroups.com>,
        <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 07/22] NTB: Fix a few ntb.h issues

From: Serge Semin 
> Fix some minor issues found in ntb.h file.
> 

"Fix a few issues" is not a descriptive commit title or message.

Please split: add NTB_SPEED_GEN4, ntb.h comments.

Changes look good and I will ack.

> Signed-off-by: Serge Semin <fancer.lancer@...il.com>
> 
> ---
>  include/linux/ntb.h | 18 ++++++++++++------
>  1 file changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/include/linux/ntb.h b/include/linux/ntb.h
> index a59a155..8b19327 100644
> --- a/include/linux/ntb.h
> +++ b/include/linux/ntb.h
> @@ -90,6 +90,7 @@ static inline char *ntb_topo_string(enum ntb_topo topo)
>   * @NTB_SPEED_GEN1:	Link is trained to gen1 speed.
>   * @NTB_SPEED_GEN2:	Link is trained to gen2 speed.
>   * @NTB_SPEED_GEN3:	Link is trained to gen3 speed.
> + * @NTB_SPEED_GEN4:	Link is trained to gen4 speed.
>   */
>  enum ntb_speed {
>  	NTB_SPEED_AUTO = -1,
> @@ -97,6 +98,7 @@ enum ntb_speed {
>  	NTB_SPEED_GEN1 = 1,
>  	NTB_SPEED_GEN2 = 2,
>  	NTB_SPEED_GEN3 = 3,
> +	NTB_SPEED_GEN4 = 4
>  };
> 
>  /**
> @@ -292,13 +294,18 @@ static inline int ntb_dev_ops_is_valid(const struct ntb_dev_ops
> *ops)
>  {
>  	/* commented callbacks are not required: */
>  	return
> +		/* Port operations are required */
>  		ops->port_number			&&
>  		ops->peer_port_count			&&
>  		ops->peer_port_number			&&
>  		ops->peer_port_idx			&&
> +
> +		/* Link operations are requiered */
>  		ops->link_is_up				&&
>  		ops->link_enable			&&
>  		ops->link_disable			&&
> +
> +		/* One or both MW interfaces should be developed */
>  		ops->mw_count				&&
>  		ops->mw_get_align			&&
>  		(ops->mw_set_trans			||
> @@ -308,12 +315,11 @@ static inline int ntb_dev_ops_is_valid(const struct ntb_dev_ops
> *ops)
>  		ops->peer_mw_get_addr			&&
>  		/* ops->peer_mw_clear_trans		&& */
> 
> +		/* Doorbell operations are mostly required */
>  		/* ops->db_is_unsafe			&& */
>  		ops->db_valid_mask			&&
> -
>  		/* both set, or both unset */
>  		(!ops->db_vector_count == !ops->db_vector_mask) &&
> -
>  		ops->db_read				&&
>  		/* ops->db_set				&& */
>  		ops->db_clear				&&
> @@ -327,6 +333,8 @@ static inline int ntb_dev_ops_is_valid(const struct ntb_dev_ops *ops)
>  		/* ops->peer_db_read_mask		&& */
>  		/* ops->peer_db_set_mask		&& */
>  		/* ops->peer_db_clear_mask		&& */
> +
> +		/* Scrachpad or messaging interfaces should be developed */
>  		((/* ops->spad_is_unsafe		&& */
>  		  ops->spad_count			&&
>  		  ops->spad_read			&&
> @@ -355,13 +363,12 @@ struct ntb_client {
>  	struct device_driver		drv;
>  	const struct ntb_client_ops	ops;
>  };
> -
>  #define drv_ntb_client(__drv) container_of((__drv), struct ntb_client, drv)
> 
>  /**
>   * struct ntb_device - ntb device
>   * @dev:		Linux device object.
> - * @pdev:		Pci device entry of the ntb.
> + * @pdev:		PCI device entry of the ntb.
>   * @topo:		Detected topology of the ntb.
>   * @port:		Local port of the ntb.
>   * @ops:		See &ntb_dev_ops.
> @@ -384,7 +391,6 @@ struct ntb_dev {
>  	/* block unregister until device is fully released */
>  	struct completion		released;
>  };
> -
>  #define dev_ntb(__dev) container_of((__dev), struct ntb_dev, dev)
> 
>  /**
> @@ -481,7 +487,7 @@ void ntb_link_event(struct ntb_dev *ntb);
>   * multiple interrupt vectors for doorbells, the vector number indicates which
>   * vector received the interrupt.  The vector number is relative to the first
>   * vector used for doorbells, starting at zero, and must be less than
> - ** ntb_db_vector_count().  The driver may call ntb_db_read() to check which
> + * ntb_db_vector_count().  The driver may call ntb_db_read() to check which
>   * doorbell bits need service, and ntb_db_vector_mask() to determine which of
>   * those bits are associated with the vector number.
>   */
> --
> 2.6.6