[Intel-gfx] [PATCH v8 1/4] drm/i915/perf: break OA config buffer object in 2
Lionel Landwerlin
lionel.g.landwerlin at intel.com
Tue Apr 28 13:56:47 UTC 2020
We want to enable performance monitoring on multiple contexts to cover
the Iris use case of using 2 GEM contexts (3D & compute).
So start by breaking the OA configuration BO which contains global &
per context register writes.
NOA muxes & OA configurations are global, while FLEXEU register
configurations are per context.
v2: Use an offset into the same VMA (Chris)
v3: Use a bitfield to select config parts to emit (Umesh)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
drivers/gpu/drm/i915/i915_perf.c | 177 ++++++++++++++++++++-----------
1 file changed, 114 insertions(+), 63 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index dec1b33e4da8..6d8a1e624bc3 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -367,11 +367,18 @@ struct perf_open_properties {
u64 poll_oa_period;
};
+enum i915_oa_config_part {
+ I915_OA_CONFIG_PART_PER_CONTEXT,
+ I915_OA_CONFIG_PART_GLOBAL,
+ I915_OA_CONFIG_PART_MAX,
+};
+
struct i915_oa_config_bo {
struct llist_node node;
struct i915_oa_config *oa_config;
struct i915_vma *vma;
+ u32 per_context_offset;
};
static struct ctl_table_header *sysctl_header;
@@ -1826,37 +1833,43 @@ static struct i915_oa_config_bo *
alloc_oa_config_buffer(struct i915_perf_stream *stream,
struct i915_oa_config *oa_config)
{
- struct drm_i915_gem_object *obj;
struct i915_oa_config_bo *oa_bo;
+ struct drm_i915_gem_object *obj;
size_t config_length = 0;
- u32 *cs;
+ u32 *cs_start, *cs;
int err;
oa_bo = kzalloc(sizeof(*oa_bo), GFP_KERNEL);
if (!oa_bo)
return ERR_PTR(-ENOMEM);
+ /*
+ * Global configuration requires a jump into the NOA wait BO for it to
+ * apply.
+ */
config_length += num_lri_dwords(oa_config->mux_regs_len);
config_length += num_lri_dwords(oa_config->b_counter_regs_len);
- config_length += num_lri_dwords(oa_config->flex_regs_len);
config_length += 3; /* MI_BATCH_BUFFER_START */
+
+ config_length += num_lri_dwords(oa_config->flex_regs_len);
+ config_length += 1 /* MI_BATCH_BUFFER_END */;
+
config_length = ALIGN(sizeof(u32) * config_length, I915_GTT_PAGE_SIZE);
- obj = i915_gem_object_create_shmem(stream->perf->i915, config_length);
+ obj = i915_gem_object_create_shmem(stream->perf->i915,
+ config_length);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto err_free;
}
- cs = i915_gem_object_pin_map(obj, I915_MAP_WB);
- if (IS_ERR(cs)) {
- err = PTR_ERR(cs);
- goto err_oa_bo;
+ cs_start = i915_gem_object_pin_map(obj, I915_MAP_WB);
+ if (IS_ERR(cs_start)) {
+ err = PTR_ERR(cs_start);
+ goto err_bo;
}
- cs = write_cs_mi_lri(cs,
- oa_config->mux_regs,
- oa_config->mux_regs_len);
+ cs = cs_start;
cs = write_cs_mi_lri(cs,
oa_config->b_counter_regs,
oa_config->b_counter_regs_len);
@@ -1871,6 +1884,14 @@ alloc_oa_config_buffer(struct i915_perf_stream *stream,
*cs++ = i915_ggtt_offset(stream->noa_wait);
*cs++ = 0;
+ oa_bo->per_context_offset = 4 * (cs - cs_start);
+
+ cs = write_cs_mi_lri(cs,
+ oa_config->mux_regs,
+ oa_config->mux_regs_len);
+
+ *cs++ = MI_BATCH_BUFFER_END;
+
i915_gem_object_flush_map(obj);
i915_gem_object_unpin_map(obj);
@@ -1879,7 +1900,7 @@ alloc_oa_config_buffer(struct i915_perf_stream *stream,
NULL);
if (IS_ERR(oa_bo->vma)) {
err = PTR_ERR(oa_bo->vma);
- goto err_oa_bo;
+ goto err_bo;
}
oa_bo->oa_config = i915_oa_config_get(oa_config);
@@ -1887,15 +1908,15 @@ alloc_oa_config_buffer(struct i915_perf_stream *stream,
return oa_bo;
-err_oa_bo:
+err_bo:
i915_gem_object_put(obj);
err_free:
kfree(oa_bo);
return ERR_PTR(err);
}
-static struct i915_vma *
-get_oa_vma(struct i915_perf_stream *stream, struct i915_oa_config *oa_config)
+static struct i915_oa_config_bo *
+get_oa_bo(struct i915_perf_stream *stream, struct i915_oa_config *oa_config)
{
struct i915_oa_config_bo *oa_bo;
@@ -1908,34 +1929,31 @@ get_oa_vma(struct i915_perf_stream *stream, struct i915_oa_config *oa_config)
memcmp(oa_bo->oa_config->uuid,
oa_config->uuid,
sizeof(oa_config->uuid)) == 0)
- goto out;
+ return oa_bo;
}
- oa_bo = alloc_oa_config_buffer(stream, oa_config);
- if (IS_ERR(oa_bo))
- return ERR_CAST(oa_bo);
-
-out:
- return i915_vma_get(oa_bo->vma);
+ return alloc_oa_config_buffer(stream, oa_config);
}
static int
emit_oa_config(struct i915_perf_stream *stream,
struct i915_oa_config *oa_config,
struct intel_context *ce,
- struct i915_active *active)
+ struct i915_active *active,
+ unsigned long config_part_mask)
{
+ struct i915_oa_config_bo *oa_bo;
struct i915_request *rq;
- struct i915_vma *vma;
+ enum i915_oa_config_part config_part;
int err;
- vma = get_oa_vma(stream, oa_config);
- if (IS_ERR(vma))
- return PTR_ERR(vma);
+ oa_bo = get_oa_bo(stream, oa_config);
+ if (IS_ERR(oa_bo))
+ return PTR_ERR(oa_bo);
- err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH);
+ err = i915_vma_pin(oa_bo->vma, 0, 0, PIN_GLOBAL | PIN_HIGH);
if (err)
- goto err_vma_put;
+ return err;
intel_engine_pm_get(ce->engine);
rq = i915_request_create(ce);
@@ -1957,26 +1975,41 @@ emit_oa_config(struct i915_perf_stream *stream,
goto err_add_request;
}
- i915_vma_lock(vma);
- err = i915_request_await_object(rq, vma->obj, 0);
+ i915_vma_lock(oa_bo->vma);
+ err = i915_request_await_object(rq, oa_bo->vma->obj, 0);
if (!err)
- err = i915_vma_move_to_active(vma, rq, 0);
- i915_vma_unlock(vma);
+ err = i915_vma_move_to_active(oa_bo->vma, rq, 0);
+ i915_vma_unlock(oa_bo->vma);
if (err)
goto err_add_request;
- err = rq->engine->emit_bb_start(rq,
- vma->node.start, 0,
- I915_DISPATCH_SECURE);
- if (err)
- goto err_add_request;
+ for_each_set_bit(config_part, &config_part_mask,
+ I915_OA_CONFIG_PART_MAX) {
+ u64 vma_offset;
+
+ switch (config_part) {
+ case I915_OA_CONFIG_PART_PER_CONTEXT:
+ vma_offset = oa_bo->vma->node.start;
+ break;
+ case I915_OA_CONFIG_PART_GLOBAL:
+ vma_offset = oa_bo->vma->node.start +
+ oa_bo->per_context_offset;
+ break;
+ default:
+ MISSING_CASE(config_part);
+ goto err_add_request;
+ }
+
+ err = rq->engine->emit_bb_start(rq, vma_offset, 0,
+ I915_DISPATCH_SECURE);
+ if (err)
+ goto err_add_request;
+ }
err_add_request:
i915_request_add(rq);
err_vma_unpin:
- i915_vma_unpin(vma);
-err_vma_put:
- i915_vma_put(vma);
+ i915_vma_unpin(oa_bo->vma);
return err;
}
@@ -2006,9 +2039,11 @@ hsw_enable_metric_set(struct i915_perf_stream *stream,
intel_uncore_rmw(uncore, GEN6_UCGCTL1,
0, GEN6_CSUNIT_CLOCK_GATE_DISABLE);
- return emit_oa_config(stream,
- stream->oa_config, oa_context(stream),
- active);
+ return emit_oa_config(stream, stream->oa_config,
+ oa_context(stream),
+ active,
+ BIT(I915_OA_CONFIG_PART_GLOBAL) |
+ BIT(I915_OA_CONFIG_PART_PER_CONTEXT));
}
static void hsw_disable_metric_set(struct i915_perf_stream *stream)
@@ -2419,7 +2454,7 @@ gen8_enable_metric_set(struct i915_perf_stream *stream,
{
struct intel_uncore *uncore = stream->uncore;
struct i915_oa_config *oa_config = stream->oa_config;
- int ret;
+ int err;
/*
* We disable slice/unslice clock ratio change reports on SKL since
@@ -2455,13 +2490,15 @@ gen8_enable_metric_set(struct i915_perf_stream *stream,
* to make sure all slices/subslices are ON before writing to NOA
* registers.
*/
- ret = lrc_configure_all_contexts(stream, oa_config, active);
- if (ret)
- return ret;
+ err = lrc_configure_all_contexts(stream, oa_config, active);
+ if (err)
+ return err;
- return emit_oa_config(stream,
- stream->oa_config, oa_context(stream),
- active);
+ return emit_oa_config(stream, oa_config,
+ oa_context(stream),
+ active,
+ BIT(I915_OA_CONFIG_PART_GLOBAL) |
+ BIT(I915_OA_CONFIG_PART_PER_CONTEXT));
}
static u32 oag_report_ctx_switches(const struct i915_perf_stream *stream)
@@ -2507,9 +2544,9 @@ gen12_enable_metric_set(struct i915_perf_stream *stream,
return ret;
/*
- * For Gen12, performance counters are context
- * saved/restored. Only enable it for the context that
- * requested this.
+ * For Gen12, performance counters are also context saved/restored on
+ * another set of performance registers. Configure the unit dealing
+ * with those.
*/
if (stream->ctx) {
ret = gen12_configure_oar_context(stream, active);
@@ -2517,9 +2554,11 @@ gen12_enable_metric_set(struct i915_perf_stream *stream,
return ret;
}
- return emit_oa_config(stream,
- stream->oa_config, oa_context(stream),
- active);
+ return emit_oa_config(stream, oa_config,
+ oa_context(stream),
+ active,
+ BIT(I915_OA_CONFIG_PART_GLOBAL) |
+ BIT(I915_OA_CONFIG_PART_PER_CONTEXT));
}
static void gen8_disable_metric_set(struct i915_perf_stream *stream)
@@ -3174,6 +3213,7 @@ static long i915_perf_config_locked(struct i915_perf_stream *stream,
unsigned long metrics_set)
{
struct i915_oa_config *config;
+ struct i915_active *active = NULL;
long ret = stream->oa_config->id;
config = i915_perf_get_oa_config(stream->perf, metrics_set);
@@ -3181,7 +3221,11 @@ static long i915_perf_config_locked(struct i915_perf_stream *stream,
return -EINVAL;
if (config != stream->oa_config) {
- int err;
+ active = i915_active_create();
+ if (!active) {
+ ret = -ENOMEM;
+ goto err_config;
+ }
/*
* If OA is bound to a specific context, emit the
@@ -3192,13 +3236,20 @@ static long i915_perf_config_locked(struct i915_perf_stream *stream,
* When set globally, we use a low priority kernel context,
* so it will effectively take effect when idle.
*/
- err = emit_oa_config(stream, config, oa_context(stream), NULL);
- if (!err)
- config = xchg(&stream->oa_config, config);
- else
- ret = err;
+ ret = emit_oa_config(stream, config,
+ oa_context(stream),
+ active,
+ BIT(I915_OA_CONFIG_PART_GLOBAL) |
+ BIT(I915_OA_CONFIG_PART_PER_CONTEXT));
+ if (ret)
+ goto err_active;
+
+ config = xchg(&stream->oa_config, config);
}
+err_active:
+ i915_active_put(active);
+err_config:
i915_oa_config_put(config);
return ret;
--
2.26.2
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