linux-kernel - Re: [PATCH] [AGPGART] intel_agp: fix GTT map size on G33

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Message-Id: <20070910221502.dba1d5ce.akpm@linux-foundation.org>
Date:	Mon, 10 Sep 2007 22:15:02 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Zhenyu Wang <zhenyu.z.wang@...el.com>
Cc:	Dave Airlie <airlied@...ux.ie>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [AGPGART] intel_agp: fix GTT map size on G33

On Wed, 5 Sep 2007 15:13:07 +0800 Zhenyu Wang <zhenyu.z.wang@...el.com> wrote:

> 
> Subject: [PATCH] [AGPGART] intel_agp: fix GTT map size on G33
> 
> G33 has 1MB GTT table range. Fix GTT mapping
> in case like 512MB aperture size.
> 
> Signed-off-by: Zhenyu Wang <zhenyu.z.wang@...el.com>
> ---
>  drivers/char/agp/intel-agp.c |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
> index 20d50d0..6a5c555 100644
> --- a/drivers/char/agp/intel-agp.c
> +++ b/drivers/char/agp/intel-agp.c
> @@ -919,6 +919,7 @@ static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge)
>  	struct aper_size_info_fixed *size;
>  	int num_entries;
>  	u32 temp, temp2;
> +	int gtt_map_size = 256 * 1024;
>  
>  	size = agp_bridge->current_size;
>  	page_order = size->page_order;
> @@ -928,7 +929,9 @@ static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge)
>  	pci_read_config_dword(intel_private.pcidev, I915_MMADDR, &temp);
>  	pci_read_config_dword(intel_private.pcidev, I915_PTEADDR,&temp2);
>  
> -	intel_private.gtt = ioremap(temp2, 256 * 1024);
> +	if (IS_G33)
> +	    gtt_map_size = 1024 * 1024; /* 1M on G33 */
> +	intel_private.gtt = ioremap(temp2, gtt_map_size);
>  	if (!intel_private.gtt)
>  		return -ENOMEM;
>  

Ditto.  What happens if this patch isn't in 2.6.23?  And is it applicable to
and needed in 2.6.22?
-
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