msm: kgsl: Add the per context preemption buffer
This buffer is used by CP to save/restore the VPC data for
the outgoing/incoming context respectively. So allocate and
map it during context initialization and then specify the
gpu address of this buffer in the preemption packets.
Change-Id: I3bb73322848e2f19f1f8e511fa5c303e57898cc8
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_device.h b/drivers/gpu/msm/kgsl_device.h
index ca1f181..b621ada 100644
--- a/drivers/gpu/msm/kgsl_device.h
+++ b/drivers/gpu/msm/kgsl_device.h
@@ -378,6 +378,8 @@ struct kgsl_process_private;
* @pwr_constraint: power constraint from userspace for this context
* @fault_count: number of times gpu hanged in last _context_throttle_time ms
* @fault_time: time of the first gpu hang in last _context_throttle_time ms
+ * @user_ctxt_record: memory descriptor used by CP to save/restore VPC data
+ * across preemption
*/
struct kgsl_context {
struct kref refcount;
@@ -395,6 +397,7 @@ struct kgsl_context {
struct kgsl_pwr_constraint pwr_constraint;
unsigned int fault_count;
unsigned long fault_time;
+ struct kgsl_mem_entry *user_ctxt_record;
};
#define _context_comm(_c) \
@@ -689,6 +692,8 @@ void kgsl_snapshot_save_frozen_objs(struct work_struct *work);
void kgsl_events_init(void);
void kgsl_events_exit(void);
+void kgsl_context_detach(struct kgsl_context *context);
+
void kgsl_del_event_group(struct kgsl_event_group *group);
void kgsl_add_event_group(struct kgsl_event_group *group,