[PATCH 13/18] drm/i915/guc: Add support for reset engine using GuC commands
Michel Thierry
michel.thierry at intel.com
Tue Mar 21 22:38:22 UTC 2017
This patch adds per engine reset and recovery (TDR) support when GuC is
used to submit workloads to GPU.
In the case of i915 directly submission to ELSP, driver manages hang
detection, recovery and resubmission. With GuC submission these tasks
are shared between driver and GuC. i915 is still responsible for detecting
a hang, and when it does it only requests GuC to reset that Engine. GuC
internally manages acquiring forcewake and idling the engine before actually
resetting it.
Once the reset is successful, i915 takes over again and handles resubmission.
The scheduler in i915 knows which requests are pending so after resetting
a engine, this data is worked out during postprocess and pending
workloads/requests are resubmitted again.
Signed-off-by: Arun Siluvery <arun.siluvery at linux.intel.com>
Signed-off-by: Jeff McGee <jeff.mcgee at intel.com>
Signed-off-by: Michel Thierry <michel.thierry at intel.com>
---
drivers/gpu/drm/i915/i915_drv.c | 39 +++++++++++++++---------
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_guc_submission.c | 48 ++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_guc_fwif.h | 6 ++++
drivers/gpu/drm/i915/intel_lrc.c | 7 +++--
drivers/gpu/drm/i915/intel_uc.h | 1 +
drivers/gpu/drm/i915/intel_uncore.c | 5 ----
7 files changed, 86 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index d1bb27874918..245dcc4ecec9 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1939,23 +1939,34 @@ int i915_reset_engine(struct intel_engine_cs *engine)
*/
i915_gem_reset_engine(engine);
- /* forcing engine to idle */
- ret = intel_request_reset_engine(engine);
- if (ret) {
- DRM_ERROR("Failed to disable %s\n", engine->name);
- goto error;
- }
+ if (!dev_priv->guc.execbuf_client) {
+ /* forcing engine to idle */
+ ret = intel_request_reset_engine(engine);
+ if (ret) {
+ DRM_ERROR("Failed to disable %s\n", engine->name);
+ goto error;
+ }
- /* finally, reset engine */
- ret = intel_gpu_reset(dev_priv, intel_engine_flag(engine));
- if (ret) {
- DRM_ERROR("Failed to reset %s, ret=%d\n", engine->name, ret);
+ /* finally, reset engine */
+ ret = intel_gpu_reset(dev_priv, intel_engine_flag(engine));
+ if (ret) {
+ DRM_ERROR("Failed to reset %s, ret=%d\n",
+ engine->name, ret);
+ intel_unrequest_reset_engine(engine);
+ goto error;
+ }
+
+ /* be sure the request reset bit gets cleared */
intel_unrequest_reset_engine(engine);
- goto error;
- }
- /* be sure the request reset bit gets cleared */
- intel_unrequest_reset_engine(engine);
+ } else {
+ ret = i915_guc_request_engine_reset(engine);
+ if (ret) {
+ DRM_ERROR("GuC failed to reset %s, ret=%d\n",
+ engine->name, ret);
+ goto error;
+ }
+ }
/* i915_gem_reset_prepare revoked the fences */
i915_gem_restore_fences(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ec63c588431d..6f42a3d8b0cf 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3047,6 +3047,7 @@ extern void i915_reset(struct drm_i915_private *dev_priv, u32 engine_mask);
extern bool intel_has_reset_engine(struct drm_i915_private *dev_priv);
extern int intel_request_reset_engine(struct intel_engine_cs *engine);
extern void intel_unrequest_reset_engine(struct intel_engine_cs *engine);
+extern int i915_guc_request_engine_reset(struct intel_engine_cs *engine);
extern int intel_guc_reset(struct drm_i915_private *dev_priv);
extern void intel_engine_init_hangcheck(struct intel_engine_cs *engine);
extern void intel_hangcheck_init(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index bceec0df1437..18d234b2e097 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -1216,6 +1216,25 @@ void i915_guc_submission_fini(struct drm_i915_private *dev_priv)
i915_vma_unpin_and_release(&guc->ctx_pool_vma);
}
+void i915_guc_submission_reenable_engine(struct intel_engine_cs *engine)
+{
+ struct drm_i915_private *dev_priv = engine->i915;
+ struct intel_guc *guc = &dev_priv->guc;
+ struct i915_guc_client *client = guc->execbuf_client;
+ const int wqi_size = sizeof(struct guc_wq_item);
+ struct drm_i915_gem_request *rq;
+
+ GEM_BUG_ON(!client);
+ intel_guc_sample_forcewake(guc);
+
+ spin_lock_irq(&engine->timeline->lock);
+ list_for_each_entry(rq, &engine->timeline->requests, link) {
+ guc_client_update_wq_rsvd(client, wqi_size);
+ __i915_guc_submit(rq);
+ }
+ spin_unlock_irq(&engine->timeline->lock);
+}
+
/**
* intel_guc_suspend() - notify GuC entering suspend state
* @dev_priv: i915 device private
@@ -1268,3 +1287,32 @@ int intel_guc_resume(struct drm_i915_private *dev_priv)
return intel_guc_send(guc, data, ARRAY_SIZE(data));
}
+
+int i915_guc_request_engine_reset(struct intel_engine_cs *engine)
+{
+ struct drm_i915_private *dev_priv = engine->i915;
+ struct intel_guc *guc = &dev_priv->guc;
+ struct i915_gem_context *ctx;
+ u32 data[7];
+
+ if (!i915.enable_guc_submission)
+ return 0;
+
+ ctx = dev_priv->kernel_context;
+
+ /*
+ * The affected context report is populated by GuC and is provided
+ * to the driver using the shared page. We request for it but don't
+ * use it as scheduler has all of these details.
+ */
+ data[0] = INTEL_GUC_ACTION_REQUEST_ENGINE_RESET;
+ data[1] = engine->guc_id;
+ data[2] = INTEL_GUC_RESET_OPTION_REPORT_AFFECTED_CONTEXTS;
+ data[3] = 0;
+ data[4] = 0;
+ data[5] = guc->execbuf_client->ctx_index;
+ /* first page is shared data with GuC */
+ data[6] = guc_ggtt_offset(ctx->engine[RCS].state);
+
+ return intel_guc_send(guc, data, ARRAY_SIZE(data));
+}
diff --git a/drivers/gpu/drm/i915/intel_guc_fwif.h b/drivers/gpu/drm/i915/intel_guc_fwif.h
index 25691f0e4c50..e4058251f5e5 100644
--- a/drivers/gpu/drm/i915/intel_guc_fwif.h
+++ b/drivers/gpu/drm/i915/intel_guc_fwif.h
@@ -497,6 +497,7 @@ union guc_log_control {
/* This Action will be programmed in C180 - SOFT_SCRATCH_O_REG */
enum intel_guc_action {
INTEL_GUC_ACTION_DEFAULT = 0x0,
+ INTEL_GUC_ACTION_REQUEST_ENGINE_RESET = 0x3,
INTEL_GUC_ACTION_SAMPLE_FORCEWAKE = 0x6,
INTEL_GUC_ACTION_ALLOCATE_DOORBELL = 0x10,
INTEL_GUC_ACTION_DEALLOCATE_DOORBELL = 0x20,
@@ -510,6 +511,11 @@ enum intel_guc_action {
INTEL_GUC_ACTION_LIMIT
};
+/* Reset engine options */
+enum action_engine_reset_options {
+ INTEL_GUC_RESET_OPTION_REPORT_AFFECTED_CONTEXTS = 0x10,
+};
+
/*
* The GuC sends its response to a command by overwriting the
* command in SS0. The response is distinguishable from a command
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index eec1e714f531..c6d89630a089 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1177,14 +1177,17 @@ static int gen8_init_common_ring(struct intel_engine_cs *engine)
/* After a GPU reset, we may have requests to replay */
clear_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted);
- if (!i915.enable_guc_submission && !execlists_elsp_idle(engine)) {
+ if (!execlists_elsp_idle(engine)) {
DRM_DEBUG_DRIVER("Restarting %s from requests [0x%x, 0x%x]\n",
engine->name,
port_seqno(&engine->execlist_port[0]),
port_seqno(&engine->execlist_port[1]));
engine->execlist_port[0].count = 0;
engine->execlist_port[1].count = 0;
- execlists_submit_ports(engine);
+ if (!i915.enable_guc_submission)
+ execlists_submit_ports(engine);
+ else
+ i915_guc_submission_reenable_engine(engine);
}
return 0;
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index a35ededfaa40..2b946273449e 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -209,6 +209,7 @@ int i915_guc_wq_reserve(struct drm_i915_gem_request *rq);
void i915_guc_wq_unreserve(struct drm_i915_gem_request *request);
void i915_guc_submission_disable(struct drm_i915_private *dev_priv);
void i915_guc_submission_fini(struct drm_i915_private *dev_priv);
+void i915_guc_submission_reenable_engine(struct intel_engine_cs *engine);
struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size);
/* intel_guc_log.c */
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index fbd45fb041c5..cf98cbe97ea5 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1762,14 +1762,9 @@ bool intel_has_gpu_reset(struct drm_i915_private *dev_priv)
return intel_get_gpu_reset(dev_priv) != NULL;
}
-/*
- * When GuC submission is enabled, GuC manages ELSP and can initiate the
- * engine reset too. For now, fall back to full GPU reset if it is enabled.
- */
bool intel_has_reset_engine(struct drm_i915_private *dev_priv)
{
return (dev_priv->info.has_reset_engine &&
- !dev_priv->guc.execbuf_client &&
i915.reset == 2);
}
--
2.11.0
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