[Intel-gfx] [PATCH v7 3/4] drm/i915/perf: prepare driver to receive multiple ctx handles
Lionel Landwerlin
lionel.g.landwerlin at intel.com
Tue Apr 28 10:08:15 UTC 2020
Make all the internal necessary changes before we flip the switch.
v2: Use an unlimited number of intel contexts (Chris)
v3: Handle GEM context with multiple RCS0 logical contexts (Chris)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
drivers/gpu/drm/i915/i915_perf.c | 553 +++++++++++++++----------
drivers/gpu/drm/i915/i915_perf_types.h | 37 +-
2 files changed, 357 insertions(+), 233 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index dad596f478ff..79f68efd7d5b 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -192,6 +192,7 @@
*/
#include <linux/anon_inodes.h>
+#include <linux/bsearch.h>
#include <linux/sizes.h>
#include <linux/uuid.h>
@@ -329,7 +330,8 @@ static const struct i915_oa_format gen12_oa_formats[I915_OA_FORMAT_MAX] = {
* @single_context: Whether a single or all gpu contexts should be monitored
* @hold_preemption: Whether the preemption is disabled for the filtered
* context
- * @ctx_handle: A gem ctx handle for use with @single_context
+ * @n_ctx_handles: Length of @ctx_handles
+ * @ctx_handles: An array of gem context handles
* @metrics_set: An ID for an OA unit metric set advertised via sysfs
* @oa_format: An OA unit HW report format
* @oa_periodic: Whether to enable periodic OA unit sampling
@@ -349,9 +351,10 @@ static const struct i915_oa_format gen12_oa_formats[I915_OA_FORMAT_MAX] = {
struct perf_open_properties {
u32 sample_flags;
- u64 single_context:1;
u64 hold_preemption:1;
- u64 ctx_handle;
+
+ u32 n_ctx_handles;
+ u32 *ctx_handles;
/* OA sampling state */
int metrics_set;
@@ -631,6 +634,23 @@ static int append_oa_sample(struct i915_perf_stream *stream,
return 0;
}
+static int ctx_id_equal(const void *key, const void *elem)
+{
+ const struct i915_perf_context_detail *details = elem;
+
+ return ((int)details->id) - *((int *)key);
+}
+
+static inline bool ctx_id_match(struct i915_perf_stream *stream,
+ u32 masked_ctx_id)
+{
+ return bsearch(&masked_ctx_id,
+ stream->pinned_ctxs,
+ stream->n_pinned_ctxs,
+ sizeof(*stream->pinned_ctxs),
+ ctx_id_equal) != NULL;
+}
+
/**
* Copies all buffered OA reports into userspace read() buffer.
* @stream: An i915-perf stream opened for OA metrics
@@ -742,7 +762,7 @@ static int gen8_append_oa_reports(struct i915_perf_stream *stream,
continue;
}
- ctx_id = report32[2] & stream->specific_ctx_id_mask;
+ ctx_id = report32[2] & stream->ctx_id_mask;
/*
* Squash whatever is in the CTX_ID field if it's marked as
@@ -787,26 +807,32 @@ static int gen8_append_oa_reports(struct i915_perf_stream *stream,
* switches since it's not-uncommon for periodic samples to
* identify a switch before any 'context switch' report.
*/
- if (!stream->perf->exclusive_stream->ctx ||
- stream->specific_ctx_id == ctx_id ||
- stream->oa_buffer.last_ctx_id == stream->specific_ctx_id ||
- reason & OAREPORT_REASON_CTX_SWITCH) {
-
- /*
- * While filtering for a single context we avoid
- * leaking the IDs of other contexts.
- */
- if (stream->perf->exclusive_stream->ctx &&
- stream->specific_ctx_id != ctx_id) {
- report32[2] = INVALID_CTX_ID;
- }
-
+ if (!stream->perf->exclusive_stream->n_ctxs) {
ret = append_oa_sample(stream, buf, count, offset,
report);
if (ret)
break;
+ } else {
+ bool ctx_match = ctx_id != INVALID_CTX_ID &&
+ ctx_id_match(stream, ctx_id);
+
+ if (ctx_match ||
+ stream->oa_buffer.last_ctx_match ||
+ reason & OAREPORT_REASON_CTX_SWITCH) {
+ /*
+ * While filtering for a single context we avoid
+ * leaking the IDs of other contexts.
+ */
+ if (!ctx_match)
+ report32[2] = INVALID_CTX_ID;
+
+ ret = append_oa_sample(stream, buf, count, offset,
+ report);
+ if (ret)
+ break;
+ }
- stream->oa_buffer.last_ctx_id = ctx_id;
+ stream->oa_buffer.last_ctx_match = ctx_match;
}
/*
@@ -1197,138 +1223,176 @@ static int i915_oa_read(struct i915_perf_stream *stream,
return stream->perf->ops.read(stream, buf, count, offset);
}
-static struct intel_context *oa_pin_context(struct i915_perf_stream *stream)
+static u32 get_ctx_id_mask(struct intel_engine_cs *engine)
{
- struct i915_gem_engines_iter it;
- struct i915_gem_context *ctx = stream->ctx;
- struct intel_context *ce;
- int err;
+ switch (INTEL_GEN(engine->i915)) {
+ case 7:
+ /*
+ * On Haswell we don't do any post processing of the reports
+ * and don't need to use the mask.
+ */
+ return 0;
- for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
- if (ce->engine != stream->engine) /* first match! */
- continue;
+ case 8:
+ case 9:
+ case 10:
+ if (intel_engine_in_execlists_submission_mode(engine))
+ return (1U << GEN8_CTX_ID_WIDTH) - 1;
/*
- * As the ID is the gtt offset of the context's vma we
- * pin the vma to ensure the ID remains fixed.
+ * GuC uses the top bit to signal proxy submission, so ignore
+ * that bit.
*/
- err = intel_context_pin(ce);
- if (err == 0) {
- stream->pinned_ctx = ce;
- break;
- }
- }
- i915_gem_context_unlock_engines(ctx);
+ return (1U << (GEN8_CTX_ID_WIDTH - 1)) - 1;
- return stream->pinned_ctx;
+ case 11:
+ case 12:
+ /*
+ * 0x7ff is used by idle context.
+ */
+ BUILD_BUG_ON((GEN12_MAX_CONTEXT_HW_ID - 1) < NUM_CONTEXT_TAG);
+ return ((1U << GEN11_SW_CTX_ID_WIDTH) - 1) << (GEN11_SW_CTX_ID_SHIFT - 32);
+
+ default:
+ MISSING_CASE(INTEL_GEN(engine->i915));
+ return 0;
+ }
}
-/**
- * oa_get_render_ctx_id - determine and hold ctx hw id
- * @stream: An i915-perf stream opened for OA metrics
- *
- * Determine the render context hw id, and ensure it remains fixed for the
- * lifetime of the stream. This ensures that we don't have to worry about
- * updating the context ID in OACONTROL on the fly.
- *
- * Returns: zero on success or a negative error code
- */
-static int oa_get_render_ctx_id(struct i915_perf_stream *stream)
+static u32 get_ctx_id(struct intel_context *ce, int idx)
{
- struct intel_context *ce;
-
- ce = oa_pin_context(stream);
- if (IS_ERR(ce))
- return PTR_ERR(ce);
switch (INTEL_GEN(ce->engine->i915)) {
- case 7: {
- /*
- * On Haswell we don't do any post processing of the reports
- * and don't need to use the mask.
- */
- stream->specific_ctx_id = i915_ggtt_offset(ce->state);
- stream->specific_ctx_id_mask = 0;
- break;
- }
+ case 7:
+ return i915_ggtt_offset(ce->state);
case 8:
case 9:
case 10:
- if (intel_engine_in_execlists_submission_mode(ce->engine)) {
- stream->specific_ctx_id_mask =
- (1U << GEN8_CTX_ID_WIDTH) - 1;
- stream->specific_ctx_id = stream->specific_ctx_id_mask;
- } else {
- /*
- * When using GuC, the context descriptor we write in
- * i915 is read by GuC and rewritten before it's
- * actually written into the hardware. The LRCA is
- * what is put into the context id field of the
- * context descriptor by GuC. Because it's aligned to
- * a page, the lower 12bits are always at 0 and
- * dropped by GuC. They won't be part of the context
- * ID in the OA reports, so squash those lower bits.
- */
- stream->specific_ctx_id =
- lower_32_bits(ce->lrc_desc) >> 12;
+ if (intel_engine_in_execlists_submission_mode(ce->engine))
+ return (1U << GEN8_CTX_ID_WIDTH) - 1 - idx;
- /*
- * GuC uses the top bit to signal proxy submission, so
- * ignore that bit.
- */
- stream->specific_ctx_id_mask =
- (1U << (GEN8_CTX_ID_WIDTH - 1)) - 1;
- }
- break;
+ /*
+ * When using GuC, the context descriptor we write in i915 is
+ * read by GuC and rewritten before it's actually written into
+ * the hardware. The LRCA is what is put into the context id
+ * field of the context descriptor by GuC. Because it's
+ * aligned to a page, the lower 12bits are always at 0 and
+ * dropped by GuC. They won't be part of the context ID in the
+ * OA reports, so squash those lower bits.
+ */
+ return lower_32_bits(ce->lrc_desc) >> 12;
case 11:
- case 12: {
- stream->specific_ctx_id_mask =
- ((1U << GEN11_SW_CTX_ID_WIDTH) - 1) << (GEN11_SW_CTX_ID_SHIFT - 32);
+ case 12:
/*
- * Pick an unused context id
- * 0 - (NUM_CONTEXT_TAG - 1) are used by other contexts
- * GEN12_MAX_CONTEXT_HW_ID (0x7ff) is used by idle context
+ * Pick an unused context id 0 -
+ * (NUM_CONTEXT_TAG - 1) are used by other
+ * contexts GEN12_MAX_CONTEXT_HW_ID (0x7ff) is
+ * used by idle context
*/
- stream->specific_ctx_id = (GEN12_MAX_CONTEXT_HW_ID - 1) << (GEN11_SW_CTX_ID_SHIFT - 32);
- BUILD_BUG_ON((GEN12_MAX_CONTEXT_HW_ID - 1) < NUM_CONTEXT_TAG);
- break;
- }
+ return ((GEN12_MAX_CONTEXT_HW_ID - 1) - idx) << (GEN11_SW_CTX_ID_SHIFT - 32);
default:
MISSING_CASE(INTEL_GEN(ce->engine->i915));
+ return 0;
}
-
- ce->tag = stream->specific_ctx_id;
-
- drm_dbg(&stream->perf->i915->drm,
- "filtering on ctx_id=0x%x ctx_id_mask=0x%x\n",
- stream->specific_ctx_id,
- stream->specific_ctx_id_mask);
-
- return 0;
}
/**
- * oa_put_render_ctx_id - counterpart to oa_get_render_ctx_id releases hold
+ * oa_put_render_ctx_id - counterpart to oa_get_render_ctx_ids releases hold
* @stream: An i915-perf stream opened for OA metrics
*
* In case anything needed doing to ensure the context HW ID would remain valid
* for the lifetime of the stream, then that can be undone here.
*/
-static void oa_put_render_ctx_id(struct i915_perf_stream *stream)
+static void oa_put_render_ctx_ids(struct i915_perf_stream *stream)
+{
+ int i;
+
+ for (i = 0; i < stream->n_pinned_ctxs; i++) {
+ struct intel_context *ce;
+
+ ce = fetch_and_zero(&stream->pinned_ctxs[i].ce);
+ if (ce) {
+ ce->tag = 0; /* recomputed on next submission after parking */
+ intel_context_unpin(ce);
+ }
+
+ stream->pinned_ctxs[i].id = INVALID_CTX_ID;
+ }
+
+ stream->ctx_id_mask = 0;
+ stream->n_pinned_ctxs = 0;
+
+ kfree(stream->pinned_ctxs);
+}
+
+static int oa_get_render_ctx_ids(struct i915_perf_stream *stream)
{
struct intel_context *ce;
+ int i, err = 0;
+ u32 n_allocated_ctxs = 0;
- ce = fetch_and_zero(&stream->pinned_ctx);
- if (ce) {
- ce->tag = 0; /* recomputed on next submission after parking */
- intel_context_unpin(ce);
+ stream->ctx_id_mask = get_ctx_id_mask(stream->engine);
+
+ for (i = 0; i < stream->n_ctxs; i++) {
+ struct i915_gem_context *ctx = stream->ctxs[i];
+ struct i915_gem_engines_iter it;
+
+ for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
+ if (ce->engine != stream->engine) /* first match! */
+ continue;
+
+ /*
+ * As the ID is the gtt offset of the context's vma we
+ * pin the vma to ensure the ID remains fixed.
+ */
+ err = intel_context_pin(ce);
+ if (err) {
+ i915_gem_context_unlock_engines(ctx);
+ break;
+ }
+
+ if (stream->n_pinned_ctxs >= n_allocated_ctxs) {
+ u32 new_allocated_len = max(n_allocated_ctxs * 2, 2u);
+ struct i915_perf_context_detail *new_ctxs =
+ krealloc(stream->pinned_ctxs,
+ sizeof(*stream->pinned_ctxs) *
+ new_allocated_len,
+ GFP_KERNEL);
+
+ if (!new_ctxs) {
+ err = -ENOMEM;
+ break;
+ }
+
+ n_allocated_ctxs = new_allocated_len;
+ stream->pinned_ctxs = new_ctxs;
+ }
+
+ stream->pinned_ctxs[stream->n_pinned_ctxs].ce = ce;
+ stream->pinned_ctxs[stream->n_pinned_ctxs].id = get_ctx_id(ce, i);
+
+ drm_dbg(&stream->perf->i915->drm,
+ "filtering on ctx_id%i=0x%x ctx_id_mask=0x%x\n",
+ i, stream->pinned_ctxs[i].id, stream->ctx_id_mask);
+
+ ce->tag = stream->pinned_ctxs[stream->n_pinned_ctxs].id;
+
+ stream->n_pinned_ctxs++;
+ }
+ i915_gem_context_unlock_engines(ctx);
+ if (err)
+ goto err;
}
- stream->specific_ctx_id = INVALID_CTX_ID;
- stream->specific_ctx_id_mask = 0;
+ return 0;
+
+err:
+ oa_put_render_ctx_ids(stream);
+
+ return err;
}
static void
@@ -1405,8 +1469,7 @@ static void i915_oa_stream_destroy(struct i915_perf_stream *stream)
intel_uncore_forcewake_put(stream->uncore, FORCEWAKE_ALL);
intel_engine_pm_put(stream->engine);
- if (stream->ctx)
- oa_put_render_ctx_id(stream);
+ oa_put_render_ctx_ids(stream);
free_oa_configs(stream);
free_noa_wait(stream);
@@ -1498,7 +1561,7 @@ static void gen8_init_oa_buffer(struct i915_perf_stream *stream)
* reports we will forward to userspace while filtering for a single
* context.
*/
- stream->oa_buffer.last_ctx_id = INVALID_CTX_ID;
+ stream->oa_buffer.last_ctx_match = false;
spin_unlock_irqrestore(&stream->oa_buffer.ptr_lock, flags);
@@ -1552,7 +1615,7 @@ static void gen12_init_oa_buffer(struct i915_perf_stream *stream)
* reports we will forward to userspace while filtering for a single
* context.
*/
- stream->oa_buffer.last_ctx_id = INVALID_CTX_ID;
+ stream->oa_buffer.last_ctx_match = false;
spin_unlock_irqrestore(&stream->oa_buffer.ptr_lock, flags);
@@ -2275,11 +2338,10 @@ static int gen8_configure_context(struct i915_perf_stream *stream,
return err;
}
-static int gen12_configure_oar_context(struct i915_perf_stream *stream,
- struct i915_active *active)
+static int gen12_configure_oar_contexts(struct i915_perf_stream *stream,
+ struct i915_active *active)
{
- int err;
- struct intel_context *ce = stream->pinned_ctx;
+ int i;
u32 format = stream->oa_buffer.format;
struct flex regs_context[] = {
{
@@ -2300,7 +2362,7 @@ static int gen12_configure_oar_context(struct i915_perf_stream *stream,
(active ? GEN12_OAR_OACONTROL_COUNTER_ENABLE : 0)
},
{
- RING_CONTEXT_CONTROL(ce->engine->mmio_base),
+ RING_CONTEXT_CONTROL(stream->engine->mmio_base),
CTX_CONTEXT_CONTROL,
_MASKED_FIELD(GEN12_CTX_CTRL_OAR_CONTEXT_ENABLE,
active ?
@@ -2309,18 +2371,28 @@ static int gen12_configure_oar_context(struct i915_perf_stream *stream,
},
};
- /* Modify the context image of pinned context with regs_context*/
- err = intel_context_lock_pinned(ce);
- if (err)
- return err;
+ for (i = 0; i < stream->n_pinned_ctxs; i++) {
+ struct intel_context *ce = stream->pinned_ctxs[i].ce;
+ int err;
- err = gen8_modify_context(stream, ce, regs_context, ARRAY_SIZE(regs_context));
- intel_context_unlock_pinned(ce);
- if (err)
- return err;
+ /* Modify the context image of pinned context with regs_context*/
+ err = intel_context_lock_pinned(ce);
+ if (err)
+ return err;
+
+ err = gen8_modify_context(stream, ce, regs_context, ARRAY_SIZE(regs_context));
+ intel_context_unlock_pinned(ce);
+ if (err)
+ return err;
+
+ /* Apply regs_lri using LRI with pinned context */
+ err = gen8_modify_self(ce, regs_lri, ARRAY_SIZE(regs_lri),
+ active);
+ if (err)
+ return err;
+ }
- /* Apply regs_lri using LRI with pinned context */
- return gen8_modify_self(ce, regs_lri, ARRAY_SIZE(regs_lri), active);
+ return 0;
}
/*
@@ -2576,11 +2648,9 @@ gen12_enable_metric_set(struct i915_perf_stream *stream,
* another set of performance registers. Configure the unit dealing
* with those.
*/
- if (stream->ctx) {
- ret = gen12_configure_oar_context(stream, active);
- if (ret)
- return ret;
- }
+ ret = gen12_configure_oar_contexts(stream, active);
+ if (ret)
+ return ret;
return emit_oa_config(stream, stream->oa_config,
stream->config_context,
@@ -2621,8 +2691,7 @@ static void gen12_disable_metric_set(struct i915_perf_stream *stream,
gen12_configure_all_contexts(stream, NULL, active);
/* disable the context save/restore or OAR counters */
- if (stream->ctx)
- gen12_configure_oar_context(stream, active);
+ gen12_configure_oar_contexts(stream, active);
/* Make sure we disable noa to save power. */
intel_uncore_rmw(uncore, RPM_CONFIG1, GEN10_GT_NOA_ENABLE, 0);
@@ -2631,8 +2700,7 @@ static void gen12_disable_metric_set(struct i915_perf_stream *stream,
static void gen7_oa_enable(struct i915_perf_stream *stream)
{
struct intel_uncore *uncore = stream->uncore;
- struct i915_gem_context *ctx = stream->ctx;
- u32 ctx_id = stream->specific_ctx_id;
+ u32 ctx_id = stream->n_pinned_ctxs ? stream->pinned_ctxs[0].id : 0;
bool periodic = stream->periodic;
u32 period_exponent = stream->period_exponent;
u32 report_format = stream->oa_buffer.format;
@@ -2654,7 +2722,7 @@ static void gen7_oa_enable(struct i915_perf_stream *stream)
GEN7_OACONTROL_TIMER_PERIOD_SHIFT) |
(periodic ? GEN7_OACONTROL_TIMER_ENABLE : 0) |
(report_format << GEN7_OACONTROL_FORMAT_SHIFT) |
- (ctx ? GEN7_OACONTROL_PER_CTX_ENABLE : 0) |
+ (stream->n_ctxs ? GEN7_OACONTROL_PER_CTX_ENABLE : 0) |
GEN7_OACONTROL_ENABLE);
}
@@ -2871,7 +2939,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
}
if (!(props->sample_flags & SAMPLE_OA_REPORT) &&
- (INTEL_GEN(perf->i915) < 12 || !stream->ctx)) {
+ (INTEL_GEN(perf->i915) < 12 || !stream->n_ctxs)) {
DRM_DEBUG("Only OA report sampling supported\n");
return -EINVAL;
}
@@ -2919,12 +2987,10 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
if (stream->periodic)
stream->period_exponent = props->oa_period_exponent;
- if (stream->ctx) {
- ret = oa_get_render_ctx_id(stream);
- if (ret) {
- DRM_DEBUG("Invalid context id to filter with\n");
- return ret;
- }
+ ret = oa_get_render_ctx_ids(stream);
+ if (ret) {
+ DRM_DEBUG("Invalid context id to filter with\n");
+ return ret;
}
ret = alloc_noa_wait(stream);
@@ -3023,8 +3089,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
free_noa_wait(stream);
err_noa_wait_alloc:
- if (stream->ctx)
- oa_put_render_ctx_id(stream);
+ oa_put_render_ctx_ids(stream);
return ret;
}
@@ -3217,8 +3282,12 @@ static void i915_perf_enable_locked(struct i915_perf_stream *stream)
if (stream->ops->enable)
stream->ops->enable(stream);
- if (stream->hold_preemption)
- intel_context_set_nopreempt(stream->pinned_ctx);
+ if (stream->hold_preemption) {
+ int i;
+
+ for (i = 0; i < stream->n_pinned_ctxs; i++)
+ intel_context_set_nopreempt(stream->pinned_ctxs[i].ce);
+ }
}
/**
@@ -3243,8 +3312,12 @@ static void i915_perf_disable_locked(struct i915_perf_stream *stream)
/* Allow stream->ops->disable() to refer to this */
stream->enabled = false;
- if (stream->hold_preemption)
- intel_context_clear_nopreempt(stream->pinned_ctx);
+ if (stream->hold_preemption) {
+ int i;
+
+ for (i = 0; i < stream->n_pinned_ctxs; i++)
+ intel_context_clear_nopreempt(stream->pinned_ctxs[i].ce);
+ }
if (stream->ops->disable)
stream->ops->disable(stream);
@@ -3262,7 +3335,7 @@ static long i915_perf_config_locked(struct i915_perf_stream *stream,
return -EINVAL;
if (config != stream->oa_config) {
- struct intel_context *ce = stream->pinned_ctx ?: stream->config_context;
+ int i;
active = i915_active_create();
if (!active) {
@@ -3270,28 +3343,29 @@ static long i915_perf_config_locked(struct i915_perf_stream *stream,
goto err_config;
}
- /*
- * If OA is bound to a specific context, emit the
- * reconfiguration inline from that context. The update
- * will then be ordered with respect to submission on that
- * context.
- *
- * When set globally, we use a low priority kernel context,
- * so it will effectively take effect when idle.
- */
ret = emit_oa_config(stream, config,
- ce,
+ stream->config_context,
active,
BIT(I915_OA_CONFIG_PART_GLOBAL) |
BIT(I915_OA_CONFIG_PART_PER_CONTEXT));
if (ret)
goto err_active;
+ for (i = 0; i < stream->n_pinned_ctxs; i++) {
+ ret = emit_oa_config(stream, config,
+ stream->pinned_ctxs[i].ce,
+ active,
+ BIT(I915_OA_CONFIG_PART_PER_CONTEXT));
+ if (ret)
+ goto err_active;
+ }
+
config = xchg(&stream->oa_config, config);
}
err_active:
- i915_active_put(active);
+ if (active)
+ i915_active_put(active);
err_config:
i915_oa_config_put(config);
@@ -3372,9 +3446,10 @@ static void i915_perf_destroy_locked(struct i915_perf_stream *stream)
if (stream->ops->destroy)
stream->ops->destroy(stream);
- if (stream->ctx)
- i915_gem_context_put(stream->ctx);
+ while (stream->n_ctxs--)
+ i915_gem_context_put(stream->ctxs[stream->n_ctxs]);
+ kfree(stream->ctxs);
kfree(stream);
}
@@ -3449,25 +3524,12 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf,
struct perf_open_properties *props,
struct drm_file *file)
{
- struct i915_gem_context *specific_ctx = NULL;
+ struct drm_i915_file_private *file_priv = file->driver_priv;
struct i915_perf_stream *stream = NULL;
unsigned long f_flags = 0;
bool privileged_op = true;
int stream_fd;
- int ret;
-
- if (props->single_context) {
- u32 ctx_handle = props->ctx_handle;
- struct drm_i915_file_private *file_priv = file->driver_priv;
-
- specific_ctx = i915_gem_context_lookup(file_priv, ctx_handle);
- if (!specific_ctx) {
- DRM_DEBUG("Failed to look up context with ID %u for opening perf stream\n",
- ctx_handle);
- ret = -ENOENT;
- goto err;
- }
- }
+ int i, ret;
/*
* On Haswell the OA unit supports clock gating off for a specific
@@ -3488,17 +3550,16 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf,
* doesn't request global stream access (i.e. query based sampling
* using MI_RECORD_PERF_COUNT.
*/
- if (IS_HASWELL(perf->i915) && specific_ctx)
+ if (IS_HASWELL(perf->i915) && props->n_ctx_handles > 0)
privileged_op = false;
- else if (IS_GEN(perf->i915, 12) && specific_ctx &&
+ else if (IS_GEN(perf->i915, 12) && (props->n_ctx_handles > 0) &&
(props->sample_flags & SAMPLE_OA_REPORT) == 0)
privileged_op = false;
if (props->hold_preemption) {
- if (!props->single_context) {
+ if (!props->n_ctx_handles) {
DRM_DEBUG("preemption disable with no context\n");
- ret = -EINVAL;
- goto err;
+ return -EINVAL;
}
privileged_op = true;
}
@@ -3519,23 +3580,43 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf,
if (privileged_op &&
i915_perf_stream_paranoid && !capable(CAP_SYS_ADMIN)) {
DRM_DEBUG("Insufficient privileges to open i915 perf stream\n");
- ret = -EACCES;
- goto err_ctx;
+ return -EACCES;
}
stream = kzalloc(sizeof(*stream), GFP_KERNEL);
- if (!stream) {
- ret = -ENOMEM;
- goto err_ctx;
+ if (!stream)
+ return -ENOMEM;
+
+ if (props->n_ctx_handles) {
+ gfp_t alloc_flags = GFP_KERNEL | __GFP_ZERO;
+
+ stream->ctxs = kmalloc_array(props->n_ctx_handles,
+ sizeof(*stream->ctxs),
+ alloc_flags);
+ if (!stream->ctxs)
+ goto err_ctx;
}
stream->perf = perf;
- stream->ctx = specific_ctx;
stream->poll_oa_period = props->poll_oa_period;
+ for (i = 0; i < props->n_ctx_handles; i++) {
+ stream->ctxs[i] = i915_gem_context_lookup(file_priv,
+ props->ctx_handles[i]);
+ if (!stream->ctxs[i]) {
+ DRM_DEBUG("Failed to look up context with ID %u for opening perf stream\n",
+ props->ctx_handles[i]);
+
+ ret = -ENOENT;
+ goto err_ctx;
+ }
+
+ stream->n_ctxs++;
+ }
+
ret = i915_oa_stream_init(stream, param, props);
if (ret)
- goto err_alloc;
+ goto err_ctx;
/* we avoid simply assigning stream->sample_flags = props->sample_flags
* to have _stream_init check the combination of sample flags more
@@ -3570,12 +3651,11 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf,
err_flags:
if (stream->ops->destroy)
stream->ops->destroy(stream);
-err_alloc:
- kfree(stream);
err_ctx:
- if (specific_ctx)
- i915_gem_context_put(specific_ctx);
-err:
+ while (stream->n_ctxs--)
+ i915_gem_context_put(stream->ctxs[stream->n_ctxs]);
+ kfree(stream->ctxs);
+ kfree(stream);
return ret;
}
@@ -3607,7 +3687,7 @@ static int read_properties_unlocked(struct i915_perf *perf,
{
u64 __user *uprop = uprops;
u32 i;
- int ret;
+ int err;
memset(props, 0, sizeof(struct perf_open_properties));
props->poll_oa_period = DEFAULT_POLL_PERIOD_NS;
@@ -3641,23 +3721,36 @@ static int read_properties_unlocked(struct i915_perf *perf,
u64 oa_period, oa_freq_hz;
u64 id, value;
- ret = get_user(id, uprop);
- if (ret)
- return ret;
+ err = get_user(id, uprop);
+ if (err)
+ goto error;
- ret = get_user(value, uprop + 1);
- if (ret)
- return ret;
+ err = get_user(value, uprop + 1);
+ if (err)
+ goto error;
if (id == 0 || id >= DRM_I915_PERF_PROP_MAX) {
DRM_DEBUG("Unknown i915 perf property ID\n");
- return -EINVAL;
+ err = -EINVAL;
+ goto error;
}
switch ((enum drm_i915_perf_property_id)id) {
case DRM_I915_PERF_PROP_CTX_HANDLE:
- props->single_context = 1;
- props->ctx_handle = value;
+ if (props->n_ctx_handles > 0) {
+ DRM_DEBUG("Context handle specified multiple times\n");
+ err = -EINVAL;
+ goto error;
+ }
+ props->ctx_handles =
+ kmalloc_array(1, sizeof(*props->ctx_handles),
+ GFP_KERNEL);
+ if (!props->ctx_handles) {
+ err = -ENOMEM;
+ goto error;
+ }
+ props->ctx_handles[0] = value;
+ props->n_ctx_handles = 1;
break;
case DRM_I915_PERF_PROP_SAMPLE_OA:
if (value)
@@ -3666,7 +3759,8 @@ static int read_properties_unlocked(struct i915_perf *perf,
case DRM_I915_PERF_PROP_OA_METRICS_SET:
if (value == 0) {
DRM_DEBUG("Unknown OA metric set ID\n");
- return -EINVAL;
+ err = -EINVAL;
+ goto error;
}
props->metrics_set = value;
break;
@@ -3674,12 +3768,14 @@ static int read_properties_unlocked(struct i915_perf *perf,
if (value == 0 || value >= I915_OA_FORMAT_MAX) {
DRM_DEBUG("Out-of-range OA report format %llu\n",
value);
- return -EINVAL;
+ err = -EINVAL;
+ goto error;
}
if (!perf->oa_formats[value].size) {
DRM_DEBUG("Unsupported OA report format %llu\n",
value);
- return -EINVAL;
+ err = -EINVAL;
+ goto error;
}
props->oa_format = value;
break;
@@ -3687,7 +3783,8 @@ static int read_properties_unlocked(struct i915_perf *perf,
if (value > OA_EXPONENT_MAX) {
DRM_DEBUG("OA timer exponent too high (> %u)\n",
OA_EXPONENT_MAX);
- return -EINVAL;
+ err = -EINVAL;
+ goto error;
}
/* Theoretically we can program the OA unit to sample
@@ -3716,7 +3813,8 @@ static int read_properties_unlocked(struct i915_perf *perf,
!capable(CAP_SYS_ADMIN)) {
DRM_DEBUG("OA exponent would exceed the max sampling frequency (sysctl dev.i915.oa_max_sample_rate) %uHz without root privileges\n",
i915_oa_max_sample_rate);
- return -EACCES;
+ err = -EACCES;
+ goto error;
}
props->oa_periodic = true;
@@ -3732,13 +3830,14 @@ static int read_properties_unlocked(struct i915_perf *perf,
u64_to_user_ptr(value),
sizeof(user_sseu))) {
DRM_DEBUG("Unable to copy global sseu parameter\n");
- return -EFAULT;
+ err = -EFAULT;
+ goto error;
}
- ret = get_sseu_config(&props->sseu, props->engine, &user_sseu);
- if (ret) {
+ err = get_sseu_config(&props->sseu, props->engine, &user_sseu);
+ if (err) {
DRM_DEBUG("Invalid SSEU configuration\n");
- return ret;
+ goto error;
}
props->has_sseu = true;
break;
@@ -3747,19 +3846,25 @@ static int read_properties_unlocked(struct i915_perf *perf,
if (value < 100000 /* 100us */) {
DRM_DEBUG("OA availability timer too small (%lluns < 100us)\n",
value);
- return -EINVAL;
+ err = -EINVAL;
+ goto error;
}
props->poll_oa_period = value;
break;
case DRM_I915_PERF_PROP_MAX:
MISSING_CASE(id);
- return -EINVAL;
+ err = -EINVAL;
+ goto error;
}
uprop += 2;
}
return 0;
+
+error:
+ kfree(props->ctx_handles);
+ return err;
}
/**
@@ -3819,6 +3924,8 @@ int i915_perf_open_ioctl(struct drm_device *dev, void *data,
ret = i915_perf_open_ioctl_locked(perf, param, &props, file);
mutex_unlock(&perf->lock);
+ kfree(props.ctx_handles);
+
return ret;
}
diff --git a/drivers/gpu/drm/i915/i915_perf_types.h b/drivers/gpu/drm/i915/i915_perf_types.h
index a8b903592a39..278defe0b456 100644
--- a/drivers/gpu/drm/i915/i915_perf_types.h
+++ b/drivers/gpu/drm/i915/i915_perf_types.h
@@ -161,10 +161,15 @@ struct i915_perf_stream {
int sample_size;
/**
- * @ctx: %NULL if measuring system-wide across all contexts or a
- * specific context that is being monitored.
+ * @n_ctxs: Number of contexts pinned for the recording.
*/
- struct i915_gem_context *ctx;
+ u32 n_ctxs;
+
+ /**
+ * @ctxs: All to %NULL if measuring system-wide across all contexts or
+ * a list specific contexts that are being monitored.
+ */
+ struct i915_gem_context **ctxs;
/**
* @enabled: Whether the stream is currently enabled, considering
@@ -199,19 +204,31 @@ struct i915_perf_stream {
struct llist_head oa_config_bos;
/**
- * @pinned_ctx: The OA context specific information.
+ * @pinned_ctxs: A array of logical context details needed for
+ * filtering and their associated pinned ID.
*/
- struct intel_context *pinned_ctx;
+ struct i915_perf_context_detail {
+ /**
+ * @ce: The OA context specific information.
+ */
+ struct intel_context *ce;
+
+ /**
+ * @id: The ids of the specific contexts.
+ */
+ u32 id;
+ } *pinned_ctxs;
/**
- * @specific_ctx_id: The id of the specific context.
+ * @n_pinned_ctxs: Length of the @pinned_ctxs array, 0 if measuring
+ * system-wide across all contexts.
*/
- u32 specific_ctx_id;
+ u32 n_pinned_ctxs;
/**
- * @specific_ctx_id_mask: The mask used to masking specific_ctx_id bits.
+ * @ctx_id_mask: The mask used to masking specific_ctx_id bits.
*/
- u32 specific_ctx_id_mask;
+ u32 ctx_id_mask;
/**
* @poll_check_timer: High resolution timer that will periodically
@@ -247,7 +264,7 @@ struct i915_perf_stream {
struct {
struct i915_vma *vma;
u8 *vaddr;
- u32 last_ctx_id;
+ bool last_ctx_match;
int format;
int format_size;
int size_exponent;
--
2.26.2
More information about the Intel-gfx
mailing list