drm/i915/perf: Fix noa wait predication for DG2

Predication for batch buffer commands changed in XEHPSDV.
MI_BATCH_BUFFER_START predicates based on MI_SET_PREDICATE_RESULT
register. The MI_SET_PREDICATE_RESULT register can only be modified
with MI_SET_PREDICATE command. When configured, the MI_SET_PREDICATE
command sets MI_SET_PREDICATE_RESULT based on bit 0 of
MI_PREDICATE_RESULT_2. Use this to configure predication in noa_wait.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221026222102.5526-4-umesh.nerlige.ramappa@intel.com

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_regs.h b/drivers/gpu/drm/i915/gt/intel_engine_regs.h
index fe1a0d5..ee3efd0 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_engine_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_regs.h
@@ -201,6 +201,7 @@
 #define RING_CONTEXT_STATUS_PTR(base)          _MMIO((base) + 0x3a0)
 #define RING_CTX_TIMESTAMP(base)               _MMIO((base) + 0x3a8) /* gen8+ */
 #define RING_PREDICATE_RESULT(base)            _MMIO((base) + 0x3b8)
+#define MI_PREDICATE_RESULT_2_ENGINE(base)     _MMIO((base) + 0x3bc)
 #define RING_FORCE_TO_NONPRIV(base, i)         _MMIO(((base) + 0x4D0) + (i) * 4)
 #define   RING_FORCE_TO_NONPRIV_DENY           REG_BIT(30)
 #define   RING_FORCE_TO_NONPRIV_ADDRESS_MASK   REG_GENMASK(25, 2)

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 2b772a6..e68666b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -286,6 +286,7 @@ static u32 i915_perf_stream_paranoid = true;
 #define OAREPORT_REASON_CTX_SWITCH     (1<<3)
 #define OAREPORT_REASON_CLK_RATIO      (1<<5)
 
+#define HAS_MI_SET_PREDICATE(i915) (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
 
 /* For sysctl proc_dointvec_minmax of i915_oa_max_sample_rate
  *
@@ -1760,6 +1761,9 @@ static int alloc_noa_wait(struct i915_perf_stream *stream)
                DELTA_TARGET,
                N_CS_GPR
        };
+       i915_reg_t mi_predicate_result = HAS_MI_SET_PREDICATE(i915) ?
+                                         MI_PREDICATE_RESULT_2_ENGINE(base) :
+                                         MI_PREDICATE_RESULT_1(RENDER_RING_BASE);
 
        bo = i915_gem_object_create_internal(i915, 4096);
        if (IS_ERR(bo)) {
@@ -1797,7 +1801,7 @@ retry:
                        stream, cs, true /* save */, CS_GPR(i),
                        INTEL_GT_SCRATCH_FIELD_PERF_CS_GPR + 8 * i, 2);
        cs = save_restore_register(
-               stream, cs, true /* save */, MI_PREDICATE_RESULT_1(RENDER_RING_BASE),
+               stream, cs, true /* save */, mi_predicate_result,
                INTEL_GT_SCRATCH_FIELD_PERF_PREDICATE_RESULT_1, 1);
 
        /* First timestamp snapshot location. */
@@ -1851,7 +1855,10 @@ retry:
         */
        *cs++ = MI_LOAD_REGISTER_REG | (3 - 2);
        *cs++ = i915_mmio_reg_offset(CS_GPR(JUMP_PREDICATE));
-       *cs++ = i915_mmio_reg_offset(MI_PREDICATE_RESULT_1(RENDER_RING_BASE));
+       *cs++ = i915_mmio_reg_offset(mi_predicate_result);
+
+       if (HAS_MI_SET_PREDICATE(i915))
+               *cs++ = MI_SET_PREDICATE | 1;
 
        /* Restart from the beginning if we had timestamps roll over. */
        *cs++ = (GRAPHICS_VER(i915) < 8 ?
@@ -1861,6 +1868,9 @@ retry:
        *cs++ = i915_ggtt_offset(vma) + (ts0 - batch) * 4;
        *cs++ = 0;
 
+       if (HAS_MI_SET_PREDICATE(i915))
+               *cs++ = MI_SET_PREDICATE;
+
        /*
         * Now add the diff between to previous timestamps and add it to :
         *      (((1 * << 64) - 1) - delay_ns)
@@ -1888,7 +1898,10 @@ retry:
         */
        *cs++ = MI_LOAD_REGISTER_REG | (3 - 2);
        *cs++ = i915_mmio_reg_offset(CS_GPR(JUMP_PREDICATE));
-       *cs++ = i915_mmio_reg_offset(MI_PREDICATE_RESULT_1(RENDER_RING_BASE));
+       *cs++ = i915_mmio_reg_offset(mi_predicate_result);
+
+       if (HAS_MI_SET_PREDICATE(i915))
+               *cs++ = MI_SET_PREDICATE | 1;
 
        /* Predicate the jump.  */
        *cs++ = (GRAPHICS_VER(i915) < 8 ?
@@ -1898,13 +1911,16 @@ retry:
        *cs++ = i915_ggtt_offset(vma) + (jump - batch) * 4;
        *cs++ = 0;
 
+       if (HAS_MI_SET_PREDICATE(i915))
+               *cs++ = MI_SET_PREDICATE;
+
        /* Restore registers. */
        for (i = 0; i < N_CS_GPR; i++)
                cs = save_restore_register(
                        stream, cs, false /* restore */, CS_GPR(i),
                        INTEL_GT_SCRATCH_FIELD_PERF_CS_GPR + 8 * i, 2);
        cs = save_restore_register(
-               stream, cs, false /* restore */, MI_PREDICATE_RESULT_1(RENDER_RING_BASE),
+               stream, cs, false /* restore */, mi_predicate_result,
                INTEL_GT_SCRATCH_FIELD_PERF_PREDICATE_RESULT_1, 1);
 
        /* And return to the ring. */