[PATCH 1/2] drm/i915: Add enum for hardware engine identifiers

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Put the engine hardware id in the common header so they are
not only associated with the GuC since they are needed for
the legacy semaphores implementation.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/gpu/drm/i915/intel_engine_cs.c  | 14 +++++++-------
 drivers/gpu/drm/i915/intel_ringbuffer.h | 10 ++++++++--
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 186c12d07f99..ab942de88d9a 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -29,7 +29,7 @@
 static const struct engine_info {
 	const char *name;
 	unsigned exec_id;
-	unsigned guc_id;
+	enum intel_engine_hw_id hw_id;
 	u32 mmio_base;
 	unsigned irq_shift;
 	int (*init_legacy)(struct intel_engine_cs *engine);
@@ -38,7 +38,7 @@ static const struct engine_info {
 	[RCS] = {
 		.name = "render ring",
 		.exec_id = I915_EXEC_RENDER,
-		.guc_id = GUC_RENDER_ENGINE,
+		.hw_id = RCS_HW,
 		.mmio_base = RENDER_RING_BASE,
 		.irq_shift = GEN8_RCS_IRQ_SHIFT,
 		.init_execlists = logical_render_ring_init,
@@ -47,7 +47,7 @@ static const struct engine_info {
 	[BCS] = {
 		.name = "blitter ring",
 		.exec_id = I915_EXEC_BLT,
-		.guc_id = GUC_BLITTER_ENGINE,
+		.hw_id = BCS_HW,
 		.mmio_base = BLT_RING_BASE,
 		.irq_shift = GEN8_BCS_IRQ_SHIFT,
 		.init_execlists = logical_xcs_ring_init,
@@ -56,7 +56,7 @@ static const struct engine_info {
 	[VCS] = {
 		.name = "bsd ring",
 		.exec_id = I915_EXEC_BSD,
-		.guc_id = GUC_VIDEO_ENGINE,
+		.hw_id = VCS_HW,
 		.mmio_base = GEN6_BSD_RING_BASE,
 		.irq_shift = GEN8_VCS1_IRQ_SHIFT,
 		.init_execlists = logical_xcs_ring_init,
@@ -65,7 +65,7 @@ static const struct engine_info {
 	[VCS2] = {
 		.name = "bsd2 ring",
 		.exec_id = I915_EXEC_BSD,
-		.guc_id = GUC_VIDEO_ENGINE2,
+		.hw_id = VCS2_HW,
 		.mmio_base = GEN8_BSD2_RING_BASE,
 		.irq_shift = GEN8_VCS2_IRQ_SHIFT,
 		.init_execlists = logical_xcs_ring_init,
@@ -74,7 +74,7 @@ static const struct engine_info {
 	[VECS] = {
 		.name = "video enhancement ring",
 		.exec_id = I915_EXEC_VEBOX,
-		.guc_id = GUC_VIDEOENHANCE_ENGINE,
+		.hw_id = VECS_HW,
 		.mmio_base = VEBOX_RING_BASE,
 		.irq_shift = GEN8_VECS_IRQ_SHIFT,
 		.init_execlists = logical_xcs_ring_init,
@@ -93,7 +93,7 @@ intel_engine_setup(struct drm_i915_private *dev_priv,
 	engine->i915 = dev_priv;
 	engine->name = info->name;
 	engine->exec_id = info->exec_id;
-	engine->hw_id = engine->guc_id = info->guc_id;
+	engine->hw_id = engine->guc_id = info->hw_id;
 	engine->mmio_base = info->mmio_base;
 	engine->irq_shift = info->irq_shift;
 
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index ea2735144b2a..ac568808aeb1 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -146,8 +146,14 @@ struct intel_engine_cs {
 #define I915_NUM_ENGINES 5
 #define _VCS(n) (VCS + (n))
 	unsigned int exec_id;
-	unsigned int hw_id;
-	unsigned int guc_id; /* XXX same as hw_id? */
+	enum intel_engine_hw_id {
+		RCS_HW = 0,
+		VCS_HW,
+		BCS_HW,
+		VECS_HW,
+		VCS2_HW
+	} hw_id;
+	enum intel_engine_hw_id guc_id; /* XXX same as hw_id? */
 	u64 fence_context;
 	u32		mmio_base;
 	unsigned int irq_shift;
-- 
1.9.1