[PATCH] drm/radeon: adjust default radeon_vm_block_size

[Alex Deucher]

On Fri, Jul 18, 2014 at 5:38 AM, Christian König
<deathsimple at vodafone.de> wrote:
> From: Christian König <christian.koenig at amd.com>
>
> Signed-off-by: Christian König <christian.koenig at amd.com>

Applied to my 3.17 tree.

Thanks,

Alex

> ---
>  drivers/gpu/drm/radeon/radeon_device.c | 6 +++++-
>  drivers/gpu/drm/radeon/radeon_drv.c    | 4 ++--
>  2 files changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
> index 03686fa..a2960db 100644
> --- a/drivers/gpu/drm/radeon/radeon_device.c
> +++ b/drivers/gpu/drm/radeon/radeon_device.c
> @@ -1077,7 +1077,11 @@ static void radeon_check_arguments(struct radeon_device *rdev)
>         /* defines number of bits in page table versus page directory,
>          * a page is 4KB so we have 12 bits offset, minimum 9 bits in the
>          * page table and the remaining bits are in the page directory */
> -       if (radeon_vm_block_size < 9) {
> +       if (radeon_vm_block_size == -1) {
> +               radeon_vm_block_size = (ilog2(radeon_vm_size) + 10) / 2;
> +               radeon_vm_block_size = max(radeon_vm_block_size, 9);
> +
> +       } else if (radeon_vm_block_size < 9) {
>                 dev_warn(rdev->dev, "VM page table size (%d) to small\n",
>                          radeon_vm_block_size);
>                 radeon_vm_block_size = 9;
> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
> index cb14213..fef5320 100644
> --- a/drivers/gpu/drm/radeon/radeon_drv.c
> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
> @@ -174,7 +174,7 @@ int radeon_aspm = -1;
>  int radeon_runtime_pm = -1;
>  int radeon_hard_reset = 0;
>  int radeon_vm_size = 4096;
> -int radeon_vm_block_size = 9;
> +int radeon_vm_block_size = -1;
>  int radeon_deep_color = 0;
>
>  MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers");
> @@ -246,7 +246,7 @@ module_param_named(hard_reset, radeon_hard_reset, int, 0444);
>  MODULE_PARM_DESC(vm_size, "VM address space size in megabytes (default 4GB)");
>  module_param_named(vm_size, radeon_vm_size, int, 0444);
>
> -MODULE_PARM_DESC(vm_block_size, "VM page table size in bits (default 9)");
> +MODULE_PARM_DESC(vm_block_size, "VM page table size in bits (default depending on vm_size)");
>  module_param_named(vm_block_size, radeon_vm_block_size, int, 0444);
>
>  MODULE_PARM_DESC(deep_color, "Deep Color support (1 = enable, 0 = disable (default))");
> --
> 1.9.1
>
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