Now that we may have multiple OA units in a single GT as well as on
separate GTs, create an engine group that maps to a single OA unit.
v2: (Jani)
- Drop warning on ENOMEM
- Reorder patch in the series
v3: (Ashutosh)
- Remove unused members from perf structs
- Update comments
- Update engine_supports_oa check
- Just return 1 in num_perf_groups_per_gt for now
- Set engine->oa_group to NULL to begin with
v4: Use engine_supports_oa() check in oa_init_reg_state (Ashutosh)
v5: Rebase after dropping engine_supports_oa helper
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_engine_types.h | 10 +++
drivers/gpu/drm/i915/gt/intel_sseu.c | 3 +-
drivers/gpu/drm/i915/i915_perf.c | 93 ++++++++++++++++++--
drivers/gpu/drm/i915/i915_perf_types.h | 33 ++++++-
4 files changed, 127 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index 0a071e5da1a8..960291f88fd6 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -53,6 +53,8 @@ struct intel_gt;
struct intel_ring;
struct intel_uncore;
struct intel_breadcrumbs;
+struct intel_engine_cs;
+struct i915_perf_group;
typedef u32 intel_engine_mask_t;
#define ALL_ENGINES ((intel_engine_mask_t)~0ul)
@@ -617,6 +619,14 @@ struct intel_engine_cs {
} props, defaults;
I915_SELFTEST_DECLARE(struct fault_attr reset_timeout);
+
+ /*
+ * The perf group maps to one OA unit which controls one OA buffer. All
+ * reports corresponding to this engine will be reported to this OA
+ * buffer. An engine will map to a single OA unit, but a single OA unit
+ * can generate reports for multiple engines.
+ */
+ struct i915_perf_group *oa_group;
};
static inline bool
diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.c b/drivers/gpu/drm/i915/gt/intel_sseu.c
index 6c6198a257ac..1141f875f5bd 100644
--- a/drivers/gpu/drm/i915/gt/intel_sseu.c
+++ b/drivers/gpu/drm/i915/gt/intel_sseu.c
@@ -6,6 +6,7 @@
#include <linux/string_helpers.h>
#include "i915_drv.h"
+#include "i915_perf_types.h"
#include "intel_engine_regs.h"
#include "intel_gt_regs.h"
#include "intel_sseu.h"
@@ -677,7 +678,7 @@ u32 intel_sseu_make_rpcs(struct intel_gt *gt,
* If i915/perf is active, we want a stable powergating configuration
* on the system. Use the configuration pinned by i915/perf.
*/
- if (gt->perf.exclusive_stream)
+ if (gt->perf.group && gt->perf.group[PERF_GROUP_OAG].exclusive_stream)
req_sseu = >->perf.sseu;
slices = hweight8(req_sseu->slice_mask);
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index ebd76b5c9712..cf4ea5e389a5 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -1570,12 +1570,18 @@ free_noa_wait(struct i915_perf_stream *stream)
i915_vma_unpin_and_release(&stream->noa_wait, 0);
}
+static bool engine_supports_oa(const struct intel_engine_cs *engine)
+{
+ return engine->oa_group;
+}
+
static void i915_oa_stream_destroy(struct i915_perf_stream *stream)
{
struct i915_perf *perf = stream->perf;
struct intel_gt *gt = stream->engine->gt;
+ struct i915_perf_group *g = stream->engine->oa_group;
- if (WARN_ON(stream != gt->perf.exclusive_stream))
+ if (WARN_ON(stream != g->exclusive_stream))
return;
/*
@@ -1584,7 +1590,7 @@ static void i915_oa_stream_destroy(struct i915_perf_stream *stream)
*
* See i915_oa_init_reg_state() and lrc_configure_all_contexts()
*/
- WRITE_ONCE(gt->perf.exclusive_stream, NULL);
+ WRITE_ONCE(g->exclusive_stream, NULL);
perf->ops.disable_metric_set(stream);
free_oa_buffer(stream);
@@ -3182,6 +3188,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
{
struct drm_i915_private *i915 = stream->perf->i915;
struct i915_perf *perf = stream->perf;
+ struct i915_perf_group *g;
struct intel_gt *gt;
int ret;
@@ -3191,6 +3198,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
return -EINVAL;
}
gt = props->engine->gt;
+ g = props->engine->oa_group;
/*
* If the sysfs metrics/ directory wasn't registered for some
@@ -3221,7 +3229,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
* counter reports and marshal to the appropriate client
* we currently only allow exclusive access
*/
- if (gt->perf.exclusive_stream) {
+ if (g->exclusive_stream) {
drm_dbg(&stream->perf->i915->drm,
"OA unit already in use\n");
return -EBUSY;
@@ -3316,7 +3324,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
stream->ops = &i915_oa_stream_ops;
stream->engine->gt->perf.sseu = props->sseu;
- WRITE_ONCE(gt->perf.exclusive_stream, stream);
+ WRITE_ONCE(g->exclusive_stream, stream);
ret = i915_perf_stream_enable_sync(stream);
if (ret) {
@@ -3339,7 +3347,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
return 0;
err_enable:
- WRITE_ONCE(gt->perf.exclusive_stream, NULL);
+ WRITE_ONCE(g->exclusive_stream, NULL);
perf->ops.disable_metric_set(stream);
free_oa_buffer(stream);
@@ -3373,7 +3381,7 @@ void i915_oa_init_reg_state(const struct intel_context *ce,
return;
/* perf.exclusive_stream serialised by lrc_configure_all_contexts() */
- stream = READ_ONCE(engine->gt->perf.exclusive_stream);
+ stream = READ_ONCE(engine->oa_group->exclusive_stream);
if (stream && GRAPHICS_VER(stream->perf->i915) < 12)
gen8_update_reg_state_unlocked(ce, stream);
}
@@ -3965,6 +3973,13 @@ static int read_properties_unlocked(struct i915_perf *perf,
return -EINVAL;
}
+ if (!engine_supports_oa(props->engine)) {
+ drm_dbg(&perf->i915->drm,
+ "Engine not supported by OA %d:%d\n",
+ I915_ENGINE_CLASS_RENDER, 0);
+ return -EINVAL;
+ }
+
/* Considering that ID = 0 is reserved and assuming that we don't
* (currently) expect any configurations to ever specify duplicate
* values for a particular property ID then the last _PROP_MAX value is
@@ -4743,6 +4758,60 @@ static struct ctl_table oa_table[] = {
{}
};
+static u32 num_perf_groups_per_gt(struct intel_gt *gt)
+{
+ return 1;
+}
+
+static u32 __oa_engine_group(struct intel_engine_cs *engine)
+{
+ if (engine->class == RENDER_CLASS)
+ return PERF_GROUP_OAG;
+ else
+ return PERF_GROUP_INVALID;
+}
+
+static int oa_init_gt(struct intel_gt *gt)
+{
+ u32 num_groups = num_perf_groups_per_gt(gt);
+ struct intel_engine_cs *engine;
+ struct i915_perf_group *g;
+ intel_engine_mask_t tmp;
+
+ g = kcalloc(num_groups, sizeof(*g), GFP_KERNEL);
+ if (!g)
+ return -ENOMEM;
+
+ for_each_engine_masked(engine, gt, ALL_ENGINES, tmp) {
+ u32 index = __oa_engine_group(engine);
+
+ engine->oa_group = NULL;
+ if (index < num_groups) {
+ g[index].num_engines++;
+ engine->oa_group = &g[index];
+ }
+ }
+
+ gt->perf.num_perf_groups = num_groups;
+ gt->perf.group = g;
+
+ return 0;
+}
+
+static int oa_init_engine_groups(struct i915_perf *perf)
+{
+ struct intel_gt *gt;
+ int i, ret;
+
+ for_each_gt(gt, perf->i915, i) {
+ ret = oa_init_gt(gt);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
static void oa_init_supported_formats(struct i915_perf *perf)
{
struct drm_i915_private *i915 = perf->i915;
@@ -4909,7 +4978,7 @@ void i915_perf_init(struct drm_i915_private *i915)
if (perf->ops.enable_metric_set) {
struct intel_gt *gt;
- int i;
+ int i, ret;
for_each_gt(gt, i915, i)
mutex_init(>->perf.lock);
@@ -4948,6 +5017,11 @@ void i915_perf_init(struct drm_i915_private *i915)
perf->i915 = i915;
+ ret = oa_init_engine_groups(perf);
+ if (ret)
+ drm_err(&i915->drm,
+ "OA initialization failed %d\n", ret);
+
oa_init_supported_formats(perf);
}
}
@@ -4976,10 +5050,15 @@ void i915_perf_sysctl_unregister(void)
void i915_perf_fini(struct drm_i915_private *i915)
{
struct i915_perf *perf = &i915->perf;
+ struct intel_gt *gt;
+ int i;
if (!perf->i915)
return;
+ for_each_gt(gt, perf->i915, i)
+ kfree(gt->perf.group);
+
idr_for_each(&perf->metrics_idr, destroy_config, perf);
idr_destroy(&perf->metrics_idr);
diff --git a/drivers/gpu/drm/i915/i915_perf_types.h b/drivers/gpu/drm/i915/i915_perf_types.h
index 4d5d8c365d9e..e7c83dcbec08 100644
--- a/drivers/gpu/drm/i915/i915_perf_types.h
+++ b/drivers/gpu/drm/i915/i915_perf_types.h
@@ -17,6 +17,7 @@
#include <linux/wait.h>
#include <uapi/drm/i915_drm.h>
+#include "gt/intel_engine_types.h"
#include "gt/intel_sseu.h"
#include "i915_reg_defs.h"
#include "intel_wakeref.h"
@@ -30,6 +31,13 @@ struct i915_vma;
struct intel_context;
struct intel_engine_cs;
+enum {
+ PERF_GROUP_OAG = 0,
+
+ PERF_GROUP_MAX,
+ PERF_GROUP_INVALID = U32_MAX,
+};
+
struct i915_oa_format {
u32 format;
int size;
@@ -390,6 +398,20 @@ struct i915_oa_ops {
u32 (*oa_hw_tail_read)(struct i915_perf_stream *stream);
};
+struct i915_perf_group {
+ /*
+ * @exclusive_stream: The stream currently using the OA unit. This is
+ * sometimes accessed outside a syscall associated to its file
+ * descriptor.
+ */
+ struct i915_perf_stream *exclusive_stream;
+
+ /*
+ * @num_engines: The number of engines using this OA unit.
+ */
+ u32 num_engines;
+};
+
struct i915_perf_gt {
/*
* Lock associated with anything below within this structure.
@@ -402,12 +424,15 @@ struct i915_perf_gt {
*/
struct intel_sseu sseu;
+ /**
+ * @num_perf_groups: number of perf groups per gt.
+ */
+ u32 num_perf_groups;
+
/*
- * @exclusive_stream: The stream currently using the OA unit. This is
- * sometimes accessed outside a syscall associated to its file
- * descriptor.
+ * @group: list of OA groups - one for each OA buffer.
*/
- struct i915_perf_stream *exclusive_stream;
+ struct i915_perf_group *group;
};
struct i915_perf {
--
2.36.1
