On Mon, 19 Mar 2018 10:53:36 +0100, Michał Winiarski
<michal.winiarski@xxxxxxxxx> wrote:
The GuC log contains a separate space used for crash dump.
We even get a separate notification for it. While we're not handling
crash differently yet, it makes sense to decouple the two right now to
simplify the following patches.
v2: Move guc_log_flush_irq_disable up to avoid movement in following
patches (Sagar).
v3: s/guc_log_flush_irq_*/guc_flush_log_msg_*, rebase after mass rename
Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx> (v2)
---
drivers/gpu/drm/i915/intel_guc.c | 25 ++++++++++---------------
drivers/gpu/drm/i915/intel_guc.h | 2 ++
drivers/gpu/drm/i915/intel_guc_log.c | 31
+++++++++++++++++++------------
drivers/gpu/drm/i915/intel_uc.c | 14 +++++---------
4 files changed, 36 insertions(+), 36 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_guc.c
b/drivers/gpu/drm/i915/intel_guc.c
index e70bf654d21e..3af603536b1b 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -67,6 +67,7 @@ void intel_guc_init_early(struct intel_guc *guc)
intel_guc_log_init_early(&guc->log);
mutex_init(&guc->send_mutex);
+ spin_lock_init(&guc->irq_lock);
please try to init members in definition order,
and try to avoid putting inside other init groups
(here 'send' related members)
guc->send = intel_guc_send_nop;
guc->notify = gen8_guc_raise_irq;
}
@@ -368,7 +369,7 @@ int intel_guc_send_mmio(struct intel_guc *guc, const
u32 *action, u32 len)
void intel_guc_to_host_event_handler(struct intel_guc *guc)
{
struct drm_i915_private *dev_priv = guc_to_i915(guc);
- u32 msg, flush;
+ u32 msg, val;
/*
* Sample the log buffer flush related bits & clear them out now
@@ -381,24 +382,18 @@ void intel_guc_to_host_event_handler(struct
intel_guc *guc)
* could happen that GuC sets the bit for 2nd interrupt but Host
* clears out the bit on handling the 1st interrupt.
*/
-
- msg = I915_READ(SOFT_SCRATCH(15));
- flush = msg & (INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED |
- INTEL_GUC_RECV_MSG_FLUSH_LOG_BUFFER);
- if (flush) {
- /* Clear the message bits that are handled */
- I915_WRITE(SOFT_SCRATCH(15), msg & ~flush);
-
- /* Handle flush interrupt in bottom half */
+ spin_lock(&guc->irq_lock);
+ val = I915_READ(SOFT_SCRATCH(15));
+ msg = val & guc->msg_enabled_mask;
+ I915_WRITE(SOFT_SCRATCH(15), val & ~msg);
+ spin_unlock(&guc->irq_lock);
+
+ if (msg & (INTEL_GUC_RECV_MSG_FLUSH_LOG_BUFFER |
+ INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED)) {
queue_work(guc->log.runtime.flush_wq,
&guc->log.runtime.flush_work);
guc->log.flush_interrupt_count++;
- } else {
- /*
- * Not clearing of unhandled event bits won't result in
- * re-triggering of the interrupt.
- */
}
}
diff --git a/drivers/gpu/drm/i915/intel_guc.h
b/drivers/gpu/drm/i915/intel_guc.h
index cdb649a9a4cf..9a95d1518aa9 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -56,7 +56,9 @@ struct intel_guc {
struct drm_i915_gem_object *load_err_log;
/* intel_guc_recv interrupt related state */
+ spinlock_t irq_lock;
bool interrupts_enabled;
+ unsigned int msg_enabled_mask;
struct i915_vma *ads_vma;
struct i915_vma *stage_desc_pool;
diff --git a/drivers/gpu/drm/i915/intel_guc_log.c
b/drivers/gpu/drm/i915/intel_guc_log.c
index 1c2127bc3878..1e209fcf90e1 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -73,6 +73,22 @@ static int guc_log_control(struct intel_guc *guc,
bool enable, u32 verbosity)
return intel_guc_send(guc, action, ARRAY_SIZE(action));
}
+static void guc_flush_log_msg_enable(struct intel_guc *guc)
+{
+ spin_lock_irq(&guc->irq_lock);
+ guc->msg_enabled_mask |= INTEL_GUC_RECV_MSG_FLUSH_LOG_BUFFER |
+ INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED;
+ spin_unlock_irq(&guc->irq_lock);
+}
+
+static void guc_flush_log_msg_disable(struct intel_guc *guc)
+{
+ spin_lock_irq(&guc->irq_lock);
+ guc->msg_enabled_mask &= ~(INTEL_GUC_RECV_MSG_FLUSH_LOG_BUFFER |
+ INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED);
+ spin_unlock_irq(&guc->irq_lock);
+}
+
hmm, these functions take "guc" and operate on "struct guc",
so why they are located in intel_guc_log.c ?
maybe better option would be to declare them as
intel_guc.h:
static inline void intel_guc_event_enable(struct intel_guc *guc, u32 mask)
{
spin_lock_irq(&guc->irq_lock);
guc->msg_enabled_mask |= mask;
spin_unlock_irq(&guc->irq_lock);
}
intel_guc_log.c:
static void guc_log_enable_flush(struct intel_guc_log *log)
{
intel_guc_event_enable(log_to_guc(log),
INTEL_GUC_RECV_MSG_FLUSH_LOG_BUFFER |
INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED);
}
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