linux-kernel - Re: [PATCH v2] calgary: Increase the maximum PHB bus number

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Message-ID: <61b968730912091137v45ba41ccte425941eeeaa963d@mail.gmail.com>
Date:	Wed, 9 Dec 2009 13:37:09 -0600
From:	Jon Mason <jdmason@...zu.us>
To:	djwong@...ibm.com
Cc:	Ingo Molnar <mingo@...e.hu>, discuss@...-64.org,
	Corinna Schultz <coschult@...ibm.com>,
	Muli Ben-Yehuda <muli@...ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] calgary: Increase the maximum PHB bus number

Thanks for fixing the comment

Acked-by: Jon Mason <jdmason@...zu.us>

On Wed, Dec 9, 2009 at 12:40 PM, Darrick J. Wong <djwong@...ibm.com> wrote:
> Newer systems (x3950M2) can have 48 PHBs per chassis and 8 chassis, so bump the
> limits up and provide an explanation of the requirements for each class.
>
> Signed-off-by: Darrick J. Wong <djwong@...ibm.com>
> Acked-by: Muli Ben-Yehuda <muli@...ibm.com>
> ---
>
>  arch/x86/kernel/pci-calgary_64.c |   13 +++++++++----
>  1 files changed, 9 insertions(+), 4 deletions(-)
>
>
> diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
> index e6ec8a2..4b7eb90 100644
> --- a/arch/x86/kernel/pci-calgary_64.c
> +++ b/arch/x86/kernel/pci-calgary_64.c
> @@ -102,10 +102,15 @@ int use_calgary __read_mostly = 0;
>  #define PMR_SOFTSTOPFAULT      0x40000000
>  #define PMR_HARDSTOP           0x20000000
>
> -#define MAX_NUM_OF_PHBS                8 /* how many PHBs in total? */
> -#define MAX_NUM_CHASSIS                8 /* max number of chassis */
> -/* MAX_PHB_BUS_NUM is the maximal possible dev->bus->number */
> -#define MAX_PHB_BUS_NUM                (MAX_NUM_OF_PHBS * MAX_NUM_CHASSIS * 2)
> +/*
> + * The maximum PHB bus number.
> + * x3950M2 (rare): 8 chassis, 48 PHBs per chassis = 384
> + * x3950M2: 4 chassis, 48 PHBs per chassis        = 192
> + * x3950 (PCIE): 8 chassis, 32 PHBs per chassis   = 256
> + * x3950 (PCIX): 8 chassis, 16 PHBs per chassis   = 128
> + */
> +#define MAX_PHB_BUS_NUM                384
> +
>  #define PHBS_PER_CALGARY       4
>
>  /* register offsets in Calgary's internal register space */
>
--
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