On Fri, Oct 16, 2015 at 1:22 PM, Samuel Pitoiset
<samuel.pitoi...@gmail.com> wrote:
> NOUVEAU_GETPARAM_GRAPH_UNITS param returns the number of GPCs, the total
> number of TPCs and the number of ROP units. Note that when the DRM
> version is too old the default number of GPCs is fixed to 4.
>
> This will be used to launch the compute kernel which is used to read MP
> performance counters over all GPCs.
>
> Signed-off-by: Samuel Pitoiset <samuel.pitoi...@gmail.com>
> ---
> src/gallium/drivers/nouveau/nvc0/nvc0_screen.c | 1 +
> src/gallium/drivers/nouveau/nvc0/nvc0_screen.h | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
> b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
> index afd91e6..ba53d10 100644
> --- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
> +++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
> @@ -914,6 +914,7 @@ nvc0_screen_create(struct nouveau_device *dev)
> else
> value = (16 << 8) | 4;
> }
> + screen->gpc_count = value & 0x0000ffff;
gpc_count is a u8... I guess you wanted to make this &0xff? Doesn't
*really* matter in practice, but a bit confusing.
> screen->mp_count = value >> 8;
> screen->mp_count_compute = screen->mp_count;
>
> diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.h
> b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.h
> index 8cf7560..857eb03 100644
> --- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.h
> +++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.h
> @@ -67,6 +67,7 @@ struct nvc0_screen {
> struct nouveau_bo *txc; /* TIC (offset 0) and TSC (65536) */
> struct nouveau_bo *poly_cache;
>
> + uint8_t gpc_count;
> uint16_t mp_count;
> uint16_t mp_count_compute; /* magic reg can make compute use fewer MPs */
>
> --
> 2.6.1
>
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