drm/i915: Make wa list per-gt

Support for multiple GT's within a single i915 device will be arriving
soon.  Since each GT may have its own fusing and require different
workarounds, we need to make the GT workaround functions and multicast
steering setup per-gt.

Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210917170845.836358-1-matthew.d.roper@intel.com

drivers/gpu/drm/i915/gt/intel_gt.c

@@ -660,6 +660,8 @@ int intel_gt_init(struct intel_gt *gt)
 	if (err)
 		return err;
 
+	intel_gt_init_workarounds(gt);
+
 	/*
 	 * This is just a security blanket to placate dragons.
 	 * On some systems, we very sporadically observe that the first TLBs
@@ -767,6 +769,7 @@ void intel_gt_driver_release(struct intel_gt *gt)
 	if (vm) /* FIXME being called twice on error paths :( */
 		i915_vm_put(vm);
 
+	intel_wa_list_free(&gt->wa_list);
 	intel_gt_pm_fini(gt);
 	intel_gt_fini_scratch(gt);
 	intel_gt_fini_buffer_pool(gt);

drivers/gpu/drm/i915/gt/intel_gt_types.h

@@ -72,6 +72,8 @@ struct intel_gt {
 
 	struct intel_uc uc;
 
+	struct i915_wa_list wa_list;
+
 	struct intel_gt_timelines {
 		spinlock_t lock; /* protects active_list */
 		struct list_head active_list;

drivers/gpu/drm/i915/gt/intel_workarounds.h

@@ -24,7 +24,7 @@ static inline void intel_wa_list_free(struct i915_wa_list *wal)
 void intel_engine_init_ctx_wa(struct intel_engine_cs *engine);
 int intel_engine_emit_ctx_wa(struct i915_request *rq);
 
-void intel_gt_init_workarounds(struct drm_i915_private *i915);
+void intel_gt_init_workarounds(struct intel_gt *gt);
 void intel_gt_apply_workarounds(struct intel_gt *gt);
 bool intel_gt_verify_workarounds(struct intel_gt *gt, const char *from);
 

drivers/gpu/drm/i915/gt/selftest_workarounds.c

@@ -66,7 +66,7 @@ reference_lists_init(struct intel_gt *gt, struct wa_lists *lists)
 	memset(lists, 0, sizeof(*lists));
 
 	wa_init_start(&lists->gt_wa_list, "GT_REF", "global");
-	gt_init_workarounds(gt->i915, &lists->gt_wa_list);
+	gt_init_workarounds(gt, &lists->gt_wa_list);
 	wa_init_finish(&lists->gt_wa_list);
 
 	for_each_engine(engine, gt, id) {

drivers/gpu/drm/i915/i915_drv.c

@@ -588,8 +588,6 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
 
 	pci_set_master(pdev);
 
-	intel_gt_init_workarounds(dev_priv);
-
 	/* On the 945G/GM, the chipset reports the MSI capability on the
 	 * integrated graphics even though the support isn't actually there
 	 * according to the published specs.  It doesn't appear to function

drivers/gpu/drm/i915/i915_drv.h

@@ -1022,8 +1022,6 @@ struct drm_i915_private {
 	 */
 	u8 active_pipes;
 
-	struct i915_wa_list gt_wa_list;
-
 	struct i915_frontbuffer_tracking fb_tracking;
 
 	struct intel_atomic_helper {

drivers/gpu/drm/i915/i915_gem.c

@@ -1139,8 +1139,6 @@ void i915_gem_driver_release(struct drm_i915_private *dev_priv)
 {
 	intel_gt_driver_release(&dev_priv->gt);
 
-	intel_wa_list_free(&dev_priv->gt_wa_list);
-
 	intel_uc_cleanup_firmwares(&dev_priv->gt.uc);
 
 	i915_gem_drain_freed_objects(dev_priv);