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tu/cs: Helpers to create a region that can be easily enabled/disabled

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To mitigate CB perf impact we'd need to be able to eaily toggle CB
related IB regions.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38378>
This commit is contained in:
Danylo Piliaiev 2025-11-11 14:47:11 +01:00 • committed by Marge Bot
parent a7f63a5dbb
commit 5d2b171886
1 changed files with 36 additions and 0 deletions
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36
src/freedreno/vulkan/tu_cs.h
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@ -441,6 +441,42 @@ tu_cs_trace_start(struct u_trace_context *utctx,
__attribute__((format(printf, 3, 4))) void
tu_cs_trace_end(struct u_trace_context *utctx, void *cs, const char *fmt, ...);
struct tu_cs_patchable_state {
uint32_t *nop_header;
uint32_t dwords;
uint32_t enable_patch;
uint32_t disable_patch;
uint32_t *_end;
};
/* Create a region that can be enabled/disabled by updating CP_NOP header. */
static struct tu_cs_patchable_state
tu_cs_patchable_start(struct tu_cs *cs, uint32_t reserved_size)
{
tu_cs_reserve(cs, reserved_size);
uint32_t *nop_header = cs->cur;
tu_cs_emit_pkt7(cs, CP_NOP, 0);
return (struct tu_cs_patchable_state) {
.nop_header = nop_header,
.dwords = 0,
.enable_patch = pm4_pkt7_hdr(CP_NOP, 0),
.disable_patch = 0,
._end = cs->end,
};
}
static void
tu_cs_patchable_end(struct tu_cs *cs,
bool enabled_by_default,
struct tu_cs_patchable_state *state)
{
assert(cs->end == state->_end);
state->dwords = cs->cur - state->nop_header - 1;
state->disable_patch = pm4_pkt7_hdr(CP_NOP, state->dwords);
if (!enabled_by_default)
*state->nop_header = state->disable_patch;
}
/* Helpers for bracketing a large sequence of commands of unknown size inside
* a CP_COND_REG_EXEC packet.
*/