netdev - RE: [PATCH] [V2] Add non-Virtex5 support for LL TEMAC driver

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Message-ID: <f317aea4-8499-4830-b4d0-58fd67b8f354@VA3EHSMHS020.ehs.local>
Date:	Mon, 15 Mar 2010 10:03:21 -0700
From:	Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
To:	"John Linn" <john.linn@...inx.com>, <netdev@...r.kernel.org>,
	<linuxppc-dev@...abs.org>, <grant.likely@...retlab.ca>,
	<jwboyer@...ux.vnet.ibm.com>
CC:	<michal.simek@...alogix.com>, "John Tyner" <jtyner@...ucr.edu>,
	<john.williams@...alogix.com>
Subject: RE: [PATCH] [V2] Add non-Virtex5 support for LL TEMAC driver



> -----Original Message-----
> From: linuxppc-dev-bounces+stephen=neuendorffer.name@...ts.ozlabs.org
[mailto:linuxppc-dev-
> bounces+stephen=neuendorffer.name@...ts.ozlabs.org] On Behalf Of John
Linn
> Sent: Friday, March 12, 2010 5:06 PM
> To: netdev@...r.kernel.org; linuxppc-dev@...abs.org;
grant.likely@...retlab.ca;
> jwboyer@...ux.vnet.ibm.com
> Cc: michal.simek@...alogix.com; John Tyner; John Linn;
john.williams@...alogix.com
> Subject: [PATCH] [V2] Add non-Virtex5 support for LL TEMAC driver
> 
> This patch adds support for using the LL TEMAC Ethernet driver on
> non-Virtex 5 platforms by adding support for accessing the Soft DMA
> registers as if they were memory mapped instead of solely through the
> DCR's (available on the Virtex 5).
> 
> The patch also updates the driver so that it runs on the MicroBlaze.
> The changes were tested on the PowerPC 440, PowerPC 405, and the
> MicroBlaze platforms.
> 
> Signed-off-by: John Tyner <jtyner@...ucr.edu>
> Signed-off-by: John Linn <john.linn@...inx.com>
> ---
> 
> V2 - Incorporated comments from Grant and added more logic to allow
the driver
> to work on MicroBlaze.
> 
>  drivers/net/Kconfig         |    1 -
>  drivers/net/ll_temac.h      |   17 +++++-
>  drivers/net/ll_temac_main.c |  124
++++++++++++++++++++++++++++++++++---------
>  3 files changed, 113 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
> index 9b6efe1..5402105 100644
> --- a/drivers/net/Kconfig
> +++ b/drivers/net/Kconfig
> @@ -2443,7 +2443,6 @@ config MV643XX_ETH
>  config XILINX_LL_TEMAC
>  	tristate "Xilinx LL TEMAC (LocalLink Tri-mode Ethernet MAC)
driver"
>  	select PHYLIB
> -	depends on PPC_DCR_NATIVE
>  	help
>  	  This driver supports the Xilinx 10/100/1000 LocalLink TEMAC
>  	  core used in Xilinx Spartan and Virtex FPGAs
> diff --git a/drivers/net/ll_temac.h b/drivers/net/ll_temac.h
> index 1af66a1..915aa34 100644
> --- a/drivers/net/ll_temac.h
> +++ b/drivers/net/ll_temac.h
> @@ -5,8 +5,11 @@
>  #include <linux/netdevice.h>
>  #include <linux/of.h>
>  #include <linux/spinlock.h>
> +
> +#ifdef CONFIG_PPC_DCR
>  #include <asm/dcr.h>
>  #include <asm/dcr-regs.h>
> +#endif
> 
>  /* packet size info */
>  #define XTE_HDR_SIZE			14      /* size of Ethernet
header */
> @@ -290,8 +293,12 @@ This option defaults to enabled (set) */
> 
>  #define TX_CONTROL_CALC_CSUM_MASK   1
> 
> +/* Align the IP data in the packet on word boundaries as MicroBlaze
> + * needs it.
> + */
> +
>  #define XTE_ALIGN       32
> -#define BUFFER_ALIGN(adr) ((XTE_ALIGN - ((u32) adr)) % XTE_ALIGN)
> +#define BUFFER_ALIGN(adr) ((34 - ((u32) adr)) % XTE_ALIGN)

Is '34' really XTE_ALIGN + 2?  (I really have no idea.... it just looks
like a suspicious change.)

Steve

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