netdev - Re: [PATCH 04/39] mv643xx_eth: get rid of individual port config register bit defines

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Message-ID: <20080605110734.GB1059@farnsworth.org>
Date:	Thu, 5 Jun 2008 04:07:34 -0700
From:	Dale Farnsworth <dale@...nsworth.org>
To:	Lennert Buytenhek <buytenh@...tstofly.org>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 04/39] mv643xx_eth: get rid of individual port config
	register bit defines

On Tue, Jun 03, 2008 at 01:02:19PM +0200, Lennert Buytenhek wrote:
> The mv643xx_eth driver only ever changes bit 0 of the port config
> register at run time, the rest of the register bits are fixed (and
> always zero).  Document the meaning of the chosen default value,
> and get rid of all the defines for each of the individual bits.
> 
> Signed-off-by: Lennert Buytenhek <buytenh@...vell.com>
> ---
>  drivers/net/mv643xx_eth.c |   44 +++++++-------------------------------------
>  1 files changed, 7 insertions(+), 37 deletions(-)
> 
> diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
> index 9a9218f..38ba365 100644
> --- a/drivers/net/mv643xx_eth.c
> +++ b/drivers/net/mv643xx_eth.c
> @@ -109,39 +109,6 @@ static char mv643xx_driver_version[] = "1.0";
>  #define OTHER_MCAST_TABLE(p)		(0x1500 + ((p) << 10))
>  #define UNICAST_TABLE(p)		(0x1600 + ((p) << 10))
>  
> -/* These macros describe Ethernet Port configuration reg (Px_cR) bits */
> -#define UNICAST_NORMAL_MODE		(0 << 0)
> -#define UNICAST_PROMISCUOUS_MODE	(1 << 0)
> -#define DEFAULT_RX_QUEUE(queue)		((queue) << 1)
> -#define DEFAULT_RX_ARP_QUEUE(queue)	((queue) << 4)
> -#define RECEIVE_BC_IF_NOT_IP_OR_ARP	(0 << 7)
> -#define REJECT_BC_IF_NOT_IP_OR_ARP	(1 << 7)
> -#define RECEIVE_BC_IF_IP		(0 << 8)
> -#define REJECT_BC_IF_IP			(1 << 8)
> -#define RECEIVE_BC_IF_ARP		(0 << 9)
> -#define REJECT_BC_IF_ARP		(1 << 9)
> -#define TX_AM_NO_UPDATE_ERROR_SUMMARY	(1 << 12)
> -#define CAPTURE_TCP_FRAMES_DIS		(0 << 14)
> -#define CAPTURE_TCP_FRAMES_EN		(1 << 14)
> -#define CAPTURE_UDP_FRAMES_DIS		(0 << 15)
> -#define CAPTURE_UDP_FRAMES_EN		(1 << 15)
> -#define DEFAULT_RX_TCP_QUEUE(queue)	((queue) << 16)
> -#define DEFAULT_RX_UDP_QUEUE(queue)	((queue) << 19)
> -#define DEFAULT_RX_BPDU_QUEUE(queue)	((queue) << 22)
> -
> -#define PORT_CONFIG_DEFAULT_VALUE			\
> -		UNICAST_NORMAL_MODE		|	\
> -		DEFAULT_RX_QUEUE(0)		|	\
> -		DEFAULT_RX_ARP_QUEUE(0)		|	\
> -		RECEIVE_BC_IF_NOT_IP_OR_ARP	|	\
> -		RECEIVE_BC_IF_IP		|	\
> -		RECEIVE_BC_IF_ARP		|	\
> -		CAPTURE_TCP_FRAMES_DIS		|	\
> -		CAPTURE_UDP_FRAMES_DIS		|	\
> -		DEFAULT_RX_TCP_QUEUE(0)		|	\
> -		DEFAULT_RX_UDP_QUEUE(0)		|	\
> -		DEFAULT_RX_BPDU_QUEUE(0)
> -
>  /* These macros describe Ethernet Port configuration extend reg (Px_cXR) bits*/
>  #define CLASSIFY_EN				(1 << 0)
>  #define SPAN_BPDU_PACKETS_AS_NORMAL		(0 << 1)
> @@ -1802,9 +1769,9 @@ static void mv643xx_eth_set_rx_mode(struct net_device *dev)
>  
>  	config_reg = rdl(mp, PORT_CONFIG(mp->port_num));
>  	if (dev->flags & IFF_PROMISC)
> -		config_reg |= (u32) UNICAST_PROMISCUOUS_MODE;
> +		config_reg |= 0x00000001;

Except for the stupid cast, I think the meaning was clearer with the
define.

>  	else
> -		config_reg &= ~(u32) UNICAST_PROMISCUOUS_MODE;
> +		config_reg &= ~0x00000001;
>  	wrl(mp, PORT_CONFIG(mp->port_num), config_reg);
>  
>  	eth_port_set_multicast_list(dev);
> @@ -2226,8 +2193,11 @@ static void eth_port_start(struct net_device *dev)
>  	/* Add the assigned Ethernet address to the port's address table */
>  	eth_port_uc_addr_set(mp, dev->dev_addr);
>  
> -	/* Assign port configuration and command. */
> -	wrl(mp, PORT_CONFIG(port_num), PORT_CONFIG_DEFAULT_VALUE);
> +	/*
> +	 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
> +	 * frames to RX queue #0.
> +	 */
> +	wrl(mp, PORT_CONFIG(port_num), 0x00000000);

Same here.

>  	wrl(mp, PORT_CONFIG_EXT(port_num), PORT_CONFIG_EXTEND_DEFAULT_VALUE);

Getting rid of the unused definitions is a good thing though.

-Dale
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