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

diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index afd91e6feeeda6c1f57c1b7b6c3fc4601a1d862f..7f0ada0c03221d490eb5eb3c9dd480af2f23519b 100644 (file)
--- 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 8cf7560e21f2763f2d67829cce97195dba1b952b..857eb0316c7156bfb428896c8ca33d16b07ccbba 100644 (file)
--- 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 */