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radeonsi: add si_install_draw_wrapper

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This allows to implement custom draw_vbo code-path without
touching si_draw_vbo.

As an example, skipped all draw calls with an odd new_draws
could be done like this:

   void mywrapper(...) {
   	   if (new_draws % 2)
   	      return;
   	   return sctx->real_draw_vbo(...);
   }

   if (some_condition_is_met)
      si_install_draw_wrapper(sctx, mywrapper);

Instead of having to add the "if ()" condition inside si_draw_vbo.

Note that a single wrapper may be installed so care must be taken
to not override an existing wrapper.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10979>
This commit is contained in:
Pierre-Eric Pelloux-Prayer 2021-05-19 17:11:57 +02:00
parent ff8a930cf7
commit b2bd9c5ccd
2 changed files with 32 additions and 6 deletions
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23
src/gallium/drivers/radeonsi/si_pipe.h
View file

@ -1286,6 +1286,8 @@ struct si_context {
struct hash_table *dirty_implicit_resources;
pipe_draw_vbo_func draw_vbo[NUM_GFX_VERSIONS - GFX6][2][2][2][2];
/* When b.draw_vbo is a wrapper, real_draw_vbo is the real draw_vbo function */
pipe_draw_vbo_func real_draw_vbo;
/* SQTT */
struct ac_thread_trace_data *thread_trace;
@ -1341,6 +1343,11 @@ void si_replace_buffer_storage(struct pipe_context *ctx, struct pipe_resource *d
void si_init_screen_buffer_functions(struct si_screen *sscreen);
void si_init_buffer_functions(struct si_context *sctx);
/* Replace the sctx->b.draw_vbo function with a wrapper. This can be use to implement
* optimizations without affecting the normal draw_vbo functions perf.
*/
void si_install_draw_wrapper(struct si_context *sctx, pipe_draw_vbo_func wrapper);
/* si_clear.c */
#define SI_CLEAR_TYPE_CMASK (1 << 0)
#define SI_CLEAR_TYPE_DCC (1 << 1)
@ -2010,12 +2017,16 @@ static inline unsigned si_get_shader_wave_size(struct si_shader *shader)
static inline void si_select_draw_vbo(struct si_context *sctx)
{
sctx->b.draw_vbo = sctx->draw_vbo[sctx->chip_class - GFX6]
[!!sctx->shader.tes.cso]
[!!sctx->shader.gs.cso]
[sctx->ngg]
[si_compute_prim_discard_enabled(sctx)];
assert(sctx->b.draw_vbo);
pipe_draw_vbo_func draw_vbo = sctx->draw_vbo[sctx->chip_class - GFX6]
[!!sctx->shader.tes.cso]
[!!sctx->shader.gs.cso]
[sctx->ngg]
[si_compute_prim_discard_enabled(sctx)];
assert(draw_vbo);
if (unlikely(sctx->real_draw_vbo))
sctx->real_draw_vbo = draw_vbo;
else
sctx->b.draw_vbo = draw_vbo;
}
/* Return the number of samples that the rasterizer uses. */

15
src/gallium/drivers/radeonsi/si_state_draw.cpp
View file

@ -2416,3 +2416,18 @@ void si_init_draw_functions(struct si_context *sctx)
si_init_ia_multi_vgt_param_table(sctx);
}
extern "C"
void si_install_draw_wrapper(struct si_context *sctx, pipe_draw_vbo_func wrapper)
{
if (wrapper) {
if (wrapper != sctx->b.draw_vbo) {
assert (!sctx->real_draw_vbo);
sctx->real_draw_vbo = sctx->b.draw_vbo;
sctx->b.draw_vbo = wrapper;
}
} else if (sctx->real_draw_vbo) {
sctx->real_draw_vbo = NULL;
si_select_draw_vbo(sctx);
}
}