Mesa (master): nvc0: store the number of GPCs to nvc0_screen

[Samuel Pitoiset]

Module: Mesa
Branch: master
Commit: 1825898e0471915673e572db4f61f1fd42461150
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=1825898e0471915673e572db4f61f1fd42461150

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Tue Oct  6 22:24:31 2015 +0200

nvc0: store the number of GPCs to nvc0_screen

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.pitoiset at gmail.com>
Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>

---

 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..7f0ada0 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 & 0x000000ff;
    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 */