drm/i915/icl: Prepare for more rings

Gen11 will add more VCS and VECS rings so prepare the
infrastructure to support that.

Bspec: 7021

v2: Rebase.
v3: Rebase.
v4: Rebase.
v5: Rebase.
v6:
  - Update for POR changes. (Daniele Ceraolo Spurio)
  - Add provisional guc engine ids - to be checked and confirmed.
v7:
  - Rebased.
  - Added the new ring masks.
  - Added the new HW ids.
v8:
  - Introduce I915_MAX_VCS/VECS to avoid magic numbers (Michal)

v9: increase MAX_ENGINE_INSTANCE to 3

Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180228101153.7224-1-mika.kuoppala@linux.intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -2746,6 +2746,9 @@ intel_info(const struct drm_i915_private *dev_priv)
 #define BLT_RING	ENGINE_MASK(BCS)
 #define VEBOX_RING	ENGINE_MASK(VECS)
 #define BSD2_RING	ENGINE_MASK(VCS2)
+#define BSD3_RING	ENGINE_MASK(VCS3)
+#define BSD4_RING	ENGINE_MASK(VCS4)
+#define VEBOX2_RING	ENGINE_MASK(VECS2)
 #define ALL_ENGINES	(~0)
 
 #define HAS_ENGINE(dev_priv, id) \

drivers/gpu/drm/i915/i915_gem.h

@@ -57,6 +57,6 @@
 #define GEM_TRACE(...) do { } while (0)
 #endif
 
-#define I915_NUM_ENGINES 5
+#define I915_NUM_ENGINES 8
 
 #endif /* __I915_GEM_H__ */

drivers/gpu/drm/i915/i915_reg.h

@@ -178,6 +178,9 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define BCS_HW		2
 #define VECS_HW		3
 #define VCS2_HW		4
+#define VCS3_HW		6
+#define VCS4_HW		7
+#define VECS2_HW	12
 
 /* Engine class */
 
@@ -188,7 +191,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define OTHER_CLASS		4
 #define MAX_ENGINE_CLASS	4
 
-#define MAX_ENGINE_INSTANCE    1
+#define MAX_ENGINE_INSTANCE    3
 
 /* PCI config space */
 

drivers/gpu/drm/i915/intel_device_info.c

@@ -542,6 +542,9 @@ void intel_device_info_runtime_init(struct intel_device_info *info)
 		info->num_scalers[PIPE_C] = 1;
 	}
 
+	BUILD_BUG_ON(I915_NUM_ENGINES >
+		     sizeof(intel_ring_mask_t) * BITS_PER_BYTE);
+
 	/*
 	 * Skylake and Broxton currently don't expose the topmost plane as its
 	 * use is exclusive with the legacy cursor and we only want to expose

drivers/gpu/drm/i915/intel_device_info.h

@@ -125,6 +125,8 @@ struct sseu_dev_info {
 	u8 has_eu_pg:1;
 };
 
+typedef u8 intel_ring_mask_t;
+
 struct intel_device_info {
 	u16 device_id;
 	u16 gen_mask;
@@ -132,7 +134,7 @@ struct intel_device_info {
 	u8 gen;
 	u8 gt; /* GT number, 0 if undefined */
 	u8 num_rings;
-	u8 ring_mask; /* Rings supported by the HW */
+	intel_ring_mask_t ring_mask; /* Rings supported by the HW */
 
 	enum intel_platform platform;
 	u32 platform_mask;

drivers/gpu/drm/i915/intel_ringbuffer.h

@@ -160,6 +160,9 @@ struct i915_ctx_workarounds {
 
 struct i915_request;
 
+#define I915_MAX_VCS	4
+#define I915_MAX_VECS	2
+
 /*
  * Engine IDs definitions.
  * Keep instances of the same type engine together.
@@ -169,8 +172,12 @@ enum intel_engine_id {
 	BCS,
 	VCS,
 	VCS2,
+	VCS3,
+	VCS4,
 #define _VCS(n) (VCS + (n))
-	VECS
+	VECS,
+	VECS2
+#define _VECS(n) (VECS + (n))
 };
 
 struct i915_priolist {