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authorMarek Olšák <marek.olsak@amd.com>2015-10-20 18:26:02 +0200
committerMarek Olšák <marek.olsak@amd.com>2015-10-20 18:27:11 +0200
commit814f31457e9ae83d4f1e39236f704721b279b73d (patch)
treed0677bba9f0815050c77e9edbaae8844bcac6d1b /src/gallium
parent921feb8782bdc3c459922858bee6d55919467436 (diff)
gallium: add PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT
This avoids a serious r600g bug leading to a GPU hang. The chances this bug will get fixed are pretty low now. I deeply regret listening to others and not pushing this patch, leaving other users with a GPU-crashing driver. Yes, it should be fixed in the compiler and it's ugly, but users couldn't care less about that. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=86720 Cc: 11.0 10.6 <mesa-stable@lists.freedesktop.org> Reviewed-by: Brian Paul <brianp@vmware.com>
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_limits.h2
-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_exec.h2
-rw-r--r--src/gallium/docs/source/screen.rst4
-rw-r--r--src/gallium/drivers/freedreno/freedreno_screen.c2
-rw-r--r--src/gallium/drivers/i915/i915_screen.c2
-rw-r--r--src/gallium/drivers/ilo/ilo_screen.c2
-rw-r--r--src/gallium/drivers/nouveau/nv30/nv30_screen.c4
-rw-r--r--src/gallium/drivers/nouveau/nv50/nv50_screen.c2
-rw-r--r--src/gallium/drivers/nouveau/nvc0/nvc0_screen.c2
-rw-r--r--src/gallium/drivers/r300/r300_screen.c4
-rw-r--r--src/gallium/drivers/r600/r600_pipe.c6
-rw-r--r--src/gallium/drivers/radeonsi/si_pipe.c2
-rw-r--r--src/gallium/drivers/svga/svga_screen.c4
-rw-r--r--src/gallium/drivers/vc4/vc4_screen.c2
-rw-r--r--src/gallium/include/pipe/p_defines.h3
15 files changed, 42 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_limits.h b/src/gallium/auxiliary/gallivm/lp_bld_limits.h
index 571c615f9f8..ad64ae058b6 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_limits.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_limits.h
@@ -137,6 +137,8 @@ gallivm_get_shader_param(enum pipe_shader_cap param)
case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
}
/* if we get here, we missed a shader cap above (and should have seen
* a compiler warning.)
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.h b/src/gallium/auxiliary/tgsi/tgsi_exec.h
index a371aa95e70..f86adcec506 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.h
@@ -474,6 +474,8 @@ tgsi_exec_get_shader_param(enum pipe_shader_cap param)
case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
}
/* if we get here, we missed a shader cap above (and should have seen
* a compiler warning.)
diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index 72f7596886d..151afb2dffe 100644
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -367,6 +367,10 @@ to be 0.
are supported.
* ``PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE``: Whether the driver doesn't
ignore tgsi_declaration_range::Last for shader inputs and outputs.
+* ``PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT``: This is the maximum number
+ of iterations that loops are allowed to have to be unrolled. It is only
+ a hint to state trackers. Whether any loops will be unrolled is not
+ guaranteed.
.. _pipe_compute_cap:
diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c
index f85e4586413..50d140fe903 100644
--- a/src/gallium/drivers/freedreno/freedreno_screen.c
+++ b/src/gallium/drivers/freedreno/freedreno_screen.c
@@ -412,6 +412,8 @@ fd_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
return 16;
case PIPE_SHADER_CAP_PREFERRED_IR:
return PIPE_SHADER_IR_TGSI;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
}
debug_printf("unknown shader param %d\n", param);
return 0;
diff --git a/src/gallium/drivers/i915/i915_screen.c b/src/gallium/drivers/i915/i915_screen.c
index c91408d3d9b..5812af626cb 100644
--- a/src/gallium/drivers/i915/i915_screen.c
+++ b/src/gallium/drivers/i915/i915_screen.c
@@ -167,6 +167,8 @@ i915_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_sha
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
default:
debug_printf("%s: Unknown cap %u.\n", __FUNCTION__, cap);
return 0;
diff --git a/src/gallium/drivers/ilo/ilo_screen.c b/src/gallium/drivers/ilo/ilo_screen.c
index acf688fc02c..e1a7dc56685 100644
--- a/src/gallium/drivers/ilo/ilo_screen.c
+++ b/src/gallium/drivers/ilo/ilo_screen.c
@@ -138,6 +138,8 @@ ilo_get_shader_param(struct pipe_screen *screen, unsigned shader,
return PIPE_SHADER_IR_TGSI;
case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
return 1;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
default:
return 0;
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_screen.c b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
index d4cf143b9a3..03301649e38 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
@@ -264,6 +264,8 @@ nv30_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
default:
debug_printf("unknown vertex shader param %d\n", param);
return 0;
@@ -305,6 +307,8 @@ nv30_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
default:
debug_printf("unknown fragment shader param %d\n", param);
return 0;
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
index a4431f20e14..ec51d00f266 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
@@ -300,6 +300,8 @@ nv50_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
default:
NOUVEAU_ERR("unknown PIPE_SHADER_CAP %d\n", param);
return 0;
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index d34c8a2b07b..af8e5f72670 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -313,6 +313,8 @@ nvc0_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
return 16; /* would be 32 in linked (OpenGL-style) mode */
case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
return 16; /* XXX not sure if more are really safe */
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
default:
NOUVEAU_ERR("unknown PIPE_SHADER_CAP %d\n", param);
return 0;
diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
index c1c522b0a3a..a576abdfaf2 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -303,6 +303,8 @@ static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, e
case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
case PIPE_SHADER_CAP_PREFERRED_IR:
return PIPE_SHADER_IR_TGSI;
}
@@ -359,6 +361,8 @@ static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, e
case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
case PIPE_SHADER_CAP_PREFERRED_IR:
return PIPE_SHADER_IR_TGSI;
}
diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c
index 75de553be2b..9a97de9965e 100644
--- a/src/gallium/drivers/r600/r600_pipe.c
+++ b/src/gallium/drivers/r600/r600_pipe.c
@@ -511,6 +511,12 @@ static int r600_get_shader_param(struct pipe_screen* pscreen, unsigned shader, e
case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ /* due to a bug in the shader compiler, some loops hang
+ * if they are not unrolled, see:
+ * https://bugs.freedesktop.org/show_bug.cgi?id=86720
+ */
+ return 255;
}
return 0;
}
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index c084f03cd25..5f910c95ef3 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -508,6 +508,8 @@ static int si_get_shader_param(struct pipe_screen* pscreen, unsigned shader, enu
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
return 1;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
}
return 0;
}
diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index 9bf661fab8c..17b042e7d95 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -456,6 +456,8 @@ vgpu9_get_shader_param(struct pipe_screen *screen, unsigned shader,
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
}
/* If we get here, we failed to handle a cap above */
debug_printf("Unexpected fragment shader query %u\n", param);
@@ -512,6 +514,8 @@ vgpu9_get_shader_param(struct pipe_screen *screen, unsigned shader,
case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
return 0;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
}
/* If we get here, we failed to handle a cap above */
debug_printf("Unexpected vertex shader query %u\n", param);
diff --git a/src/gallium/drivers/vc4/vc4_screen.c b/src/gallium/drivers/vc4/vc4_screen.c
index 3b12464a2f6..774ec095652 100644
--- a/src/gallium/drivers/vc4/vc4_screen.c
+++ b/src/gallium/drivers/vc4/vc4_screen.c
@@ -337,6 +337,8 @@ vc4_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
return VC4_MAX_TEXTURE_SAMPLERS;
case PIPE_SHADER_CAP_PREFERRED_IR:
return PIPE_SHADER_IR_TGSI;
+ case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
+ return 32;
default:
fprintf(stderr, "unknown shader param %d\n", param);
return 0;
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 3a1265dcc22..1ad545aae09 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -697,7 +697,8 @@ enum pipe_shader_cap
PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED, /* all rounding modes */
PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED,
PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED,
- PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE
+ PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE,
+ PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT,
};
/**