[PATCH v3] drm/xe/vram: fix ccs offset calculation

[Lucas De Marchi]

On Mon, Sep 16, 2024 at 09:49:12AM GMT, Matthew Auld wrote:
>Spec says SW is expected to round up to the nearest 128K, if not already
>aligned for the CC unit view of CCS. We are seeing the assert sometimes
>pop on BMG to tell us that there is a hole between GSM and CCS, as well
>as popping other asserts with having a vram size with strange alignment,
>which is likely caused by misaligned offset here.
>
>v2 (Shuicheng):
> - Do the round_up() on final SW address.
>
>BSpec: 68023
>Fixes: b5c2ca0372dc ("drm/xe/xe2hpg: Determine flat ccs offset for vram")
>Signed-off-by: Matthew Auld <matthew.auld at intel.com>
>Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
>Cc: Akshata Jahagirdar <akshata.jahagirdar at intel.com>
>Cc: Lucas De Marchi <lucas.demarchi at intel.com>
>Cc: Shuicheng Lin <shuicheng.lin at intel.com>
>Cc: Matt Roper <matthew.d.roper at intel.com>
>Cc: <stable at vger.kernel.org> # v6.10+
>Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
>Tested-by: Shuicheng Lin <shuicheng.lin at intel.com>

This version now works for the random BMG I was using.

Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>

thanks
Lucas De Marchi