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radeonsi: add flag L2_STREAM for minimal cache usage

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This commit is contained in:
Marek Olšák 2018-08-02 20:33:06 -04:00
parent 8f6e06d160
commit 0c5429cc73
3 changed files with 13 additions and 6 deletions
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2
src/amd/common/sid.h
View file

@ -294,11 +294,13 @@
#define V_500_GDS 1 /* program SAS to 1 as well */
#define V_500_DATA 2
#define V_500_SRC_ADDR_TC_L2 3 /* new for CIK */
#define S_500_DST_CACHE_POLICY(x) (((unsigned)(x) & 0x3) << 25) /* CIK+ */
#define S_500_DST_SEL(x) (((unsigned)(x) & 0x3) << 20)
#define V_500_DST_ADDR 0
#define V_500_GDS 1 /* program DAS to 1 as well */
#define V_500_NOWHERE 2 /* new for GFX9 */
#define V_500_DST_ADDR_TC_L2 3 /* new for CIK */
#define S_500_SRC_CACHE_POLICY(x) (((unsigned)(x) & 0x3) << 13) /* CIK+ */
#define S_500_ENGINE(x) ((x) & 0x1)
#define V_500_ME 0
#define V_500_PFP 1

16
src/gallium/drivers/radeonsi/si_cp_dma.c
View file

@ -88,15 +88,19 @@ static void si_emit_cp_dma(struct si_context *sctx, uint64_t dst_va,
/* Src and dst flags. */
if (sctx->chip_class >= GFX9 && !(flags & CP_DMA_CLEAR) &&
src_va == dst_va)
src_va == dst_va) {
header |= S_411_DST_SEL(V_411_NOWHERE); /* prefetch only */
else if (sctx->chip_class >= CIK && cache_policy != L2_BYPASS)
header |= S_411_DST_SEL(V_411_DST_ADDR_TC_L2);
} else if (sctx->chip_class >= CIK && cache_policy != L2_BYPASS) {
header |= S_411_DST_SEL(V_411_DST_ADDR_TC_L2) |
S_500_DST_CACHE_POLICY(cache_policy == L2_STREAM);
}
if (flags & CP_DMA_CLEAR)
if (flags & CP_DMA_CLEAR) {
header |= S_411_SRC_SEL(V_411_DATA);
else if (sctx->chip_class >= CIK && cache_policy != L2_BYPASS)
header |= S_411_SRC_SEL(V_411_SRC_ADDR_TC_L2);
} else if (sctx->chip_class >= CIK && cache_policy != L2_BYPASS) {
header |= S_411_SRC_SEL(V_411_SRC_ADDR_TC_L2) |
S_500_SRC_CACHE_POLICY(cache_policy == L2_STREAM);
}
if (sctx->chip_class >= CIK) {
radeon_emit(cs, PKT3(PKT3_DMA_DATA, 5, 0));

1
src/gallium/drivers/radeonsi/si_pipe.h
View file

@ -1111,6 +1111,7 @@ void si_init_clear_functions(struct si_context *sctx);
enum si_cache_policy {
L2_BYPASS,
L2_LRU, /* same as SLC=0 */
L2_STREAM, /* same as SLC=1 */
};
enum si_coherency {