From: Marek Olšák Date: Mon, 19 Aug 2019 17:15:54 +0000 (-0400) Subject: radeonsi: fix scratch buffer WAVESIZE setting leading to corruption X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=360cf3c4b05679709574ef4d20b5097b0fd0be82;p=mesa.git radeonsi: fix scratch buffer WAVESIZE setting leading to corruption Cc: 19.2 19.1 Reviewed-by: Pierre-Eric Pelloux-Prayer --- diff --git a/src/gallium/drivers/radeonsi/si_compute.c b/src/gallium/drivers/radeonsi/si_compute.c index 32f934237b0..3acc1c69a0a 100644 --- a/src/gallium/drivers/radeonsi/si_compute.c +++ b/src/gallium/drivers/radeonsi/si_compute.c @@ -532,9 +532,13 @@ static bool si_switch_compute_shader(struct si_context *sctx, COMPUTE_DBG(sctx->screen, "COMPUTE_PGM_RSRC1: 0x%08x " "COMPUTE_PGM_RSRC2: 0x%08x\n", config->rsrc1, config->rsrc2); + sctx->max_seen_compute_scratch_bytes_per_wave = + MAX2(sctx->max_seen_compute_scratch_bytes_per_wave, + config->scratch_bytes_per_wave); + radeon_set_sh_reg(cs, R_00B860_COMPUTE_TMPRING_SIZE, S_00B860_WAVES(sctx->scratch_waves) - | S_00B860_WAVESIZE(config->scratch_bytes_per_wave >> 10)); + | S_00B860_WAVESIZE(sctx->max_seen_compute_scratch_bytes_per_wave >> 10)); sctx->cs_shader_state.emitted_program = program; sctx->cs_shader_state.offset = offset; diff --git a/src/gallium/drivers/radeonsi/si_pipe.h b/src/gallium/drivers/radeonsi/si_pipe.h index b0495f0841b..86aee2e0824 100644 --- a/src/gallium/drivers/radeonsi/si_pipe.h +++ b/src/gallium/drivers/radeonsi/si_pipe.h @@ -1078,6 +1078,8 @@ struct si_context { struct si_resource *scratch_buffer; unsigned scratch_waves; unsigned spi_tmpring_size; + unsigned max_seen_scratch_bytes_per_wave; + unsigned max_seen_compute_scratch_bytes_per_wave; struct si_resource *compute_scratch_buffer; diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c index 5d64f39b287..d6fa1f18582 100644 --- a/src/gallium/drivers/radeonsi/si_state_shaders.c +++ b/src/gallium/drivers/radeonsi/si_state_shaders.c @@ -3625,11 +3625,6 @@ static int si_update_scratch_buffer(struct si_context *sctx, return 1; } -static unsigned si_get_current_scratch_buffer_size(struct si_context *sctx) -{ - return sctx->scratch_buffer ? sctx->scratch_buffer->b.b.width0 : 0; -} - static unsigned si_get_scratch_buffer_bytes_per_wave(struct si_shader *shader) { return shader ? shader->config.scratch_bytes_per_wave : 0; @@ -3644,23 +3639,6 @@ static struct si_shader *si_get_tcs_current(struct si_context *sctx) sctx->fixed_func_tcs_shader.current; } -static unsigned si_get_max_scratch_bytes_per_wave(struct si_context *sctx) -{ - unsigned bytes = 0; - - bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(sctx->ps_shader.current)); - bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(sctx->gs_shader.current)); - bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(sctx->vs_shader.current)); - bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(sctx->tes_shader.current)); - - if (sctx->tes_shader.cso) { - struct si_shader *tcs = si_get_tcs_current(sctx); - - bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(tcs)); - } - return bytes; -} - static bool si_update_scratch_relocs(struct si_context *sctx) { struct si_shader *tcs = si_get_tcs_current(sctx); @@ -3722,16 +3700,40 @@ static bool si_update_scratch_relocs(struct si_context *sctx) static bool si_update_spi_tmpring_size(struct si_context *sctx) { - unsigned current_scratch_buffer_size = - si_get_current_scratch_buffer_size(sctx); - unsigned scratch_bytes_per_wave = - si_get_max_scratch_bytes_per_wave(sctx); - unsigned scratch_needed_size = scratch_bytes_per_wave * - sctx->scratch_waves; + /* SPI_TMPRING_SIZE.WAVESIZE must be constant for each scratch buffer. + * There are 2 cases to handle: + * + * - If the current needed size is less than the maximum seen size, + * use the maximum seen size, so that WAVESIZE remains the same. + * + * - If the current needed size is greater than the maximum seen size, + * the scratch buffer is reallocated, so we can increase WAVESIZE. + * + * Shaders that set SCRATCH_EN=0 don't allocate scratch space. + * Otherwise, the number of waves that can use scratch is + * SPI_TMPRING_SIZE.WAVES. + */ + unsigned bytes = 0; + + bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(sctx->ps_shader.current)); + bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(sctx->gs_shader.current)); + bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(sctx->vs_shader.current)); + + if (sctx->tes_shader.cso) { + bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(sctx->tes_shader.current)); + bytes = MAX2(bytes, si_get_scratch_buffer_bytes_per_wave(si_get_tcs_current(sctx))); + } + + sctx->max_seen_scratch_bytes_per_wave = + MAX2(sctx->max_seen_scratch_bytes_per_wave, bytes); + + unsigned scratch_needed_size = + sctx->max_seen_scratch_bytes_per_wave * sctx->scratch_waves; unsigned spi_tmpring_size; if (scratch_needed_size > 0) { - if (scratch_needed_size > current_scratch_buffer_size) { + if (!sctx->scratch_buffer || + scratch_needed_size > sctx->scratch_buffer->b.b.width0) { /* Create a bigger scratch buffer */ si_resource_reference(&sctx->scratch_buffer, NULL); @@ -3758,7 +3760,7 @@ static bool si_update_spi_tmpring_size(struct si_context *sctx) "scratch size should already be aligned correctly."); spi_tmpring_size = S_0286E8_WAVES(sctx->scratch_waves) | - S_0286E8_WAVESIZE(scratch_bytes_per_wave >> 10); + S_0286E8_WAVESIZE(sctx->max_seen_scratch_bytes_per_wave >> 10); if (spi_tmpring_size != sctx->spi_tmpring_size) { sctx->spi_tmpring_size = spi_tmpring_size; si_mark_atom_dirty(sctx, &sctx->atoms.s.scratch_state);