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Commit c2c7f240 authored by Dave Gordon's avatar Dave Gordon Committed by Tvrtko Ursulin
Browse files

drm/i915: unify first-stage engine struct setup 



intel_lrc.c has a table of "logical rings" (meaning engines), while
intel_ringbuffer.c has separately open-coded initialisation for each
engine. We can deduplicate this somewhat by using the same first-stage
engine-setup function for both modes.

So here we expose the function that transfers information from the
static table of (all) known engines to the dev_priv->engine array of
engines available on this device (adjusting the names along the way)
and then embed calls to it in both the LRC and the legacy-mode setup.

Signed-off-by: default avatarDave Gordon <david.s.gordon@intel.com>
Reviewed-by: Chris Wilson <chris-wilson.co.uk>
Signed-off-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
parent 035ea405

drivers/gpu/drm/i915/intel_lrc.c

+26 −14
Original line number Diff line number Diff line
@@ -1978,8 +1978,9 @@ logical_ring_default_vfuncs(struct intel_engine_cs *engine) 
}



static inline void

logical_ring_default_irqs(struct intel_engine_cs *engine, unsigned shift)

logical_ring_default_irqs(struct intel_engine_cs *engine)

{

	unsigned shift = engine->irq_shift;

	engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT << shift;

	engine->irq_keep_mask = GT_CONTEXT_SWITCH_INTERRUPT << shift;

}
@@ -2083,14 +2084,14 @@ static int logical_render_ring_init(struct intel_engine_cs *engine) 
	return ret;

}



static const struct logical_ring_info {

static const struct engine_info {

	const char *name;

	unsigned exec_id;

	unsigned guc_id;

	u32 mmio_base;

	unsigned irq_shift;

	int (*init)(struct intel_engine_cs *engine);

} logical_rings[] = {

} intel_engines[] = {

	[RCS] = {

		.name = "render ring",

		.exec_id = I915_EXEC_RENDER,
@@ -2133,20 +2134,31 @@ static const struct logical_ring_info { 
	},

};



static struct intel_engine_cs *

logical_ring_setup(struct drm_i915_private *dev_priv, enum intel_engine_id id)

struct intel_engine_cs *

intel_engine_setup(struct drm_i915_private *dev_priv,

		   enum intel_engine_id id)

{

	const struct logical_ring_info *info = &logical_rings[id];

	const struct engine_info *info = &intel_engines[id];

	struct intel_engine_cs *engine = &dev_priv->engine[id];

	enum forcewake_domains fw_domains;



	engine->id = id;

	engine->i915 = dev_priv;

	engine->name = info->name;

	engine->exec_id = info->exec_id;

	engine->guc_id = info->guc_id;

	engine->hw_id = engine->guc_id = info->guc_id;

	engine->mmio_base = info->mmio_base;

	engine->irq_shift = info->irq_shift;



	engine->i915 = dev_priv;

	return engine;

}



static struct intel_engine_cs *

logical_ring_setup(struct drm_i915_private *dev_priv, enum intel_engine_id id)

{

	struct intel_engine_cs *engine;

	enum forcewake_domains fw_domains;



	engine = intel_engine_setup(dev_priv, id);



	/* Intentionally left blank. */

	engine->buffer = NULL;
@@ -2176,7 +2188,7 @@ logical_ring_setup(struct drm_i915_private *dev_priv, enum intel_engine_id id) 


	logical_ring_init_platform_invariants(engine);

	logical_ring_default_vfuncs(engine);

	logical_ring_default_irqs(engine, info->irq_shift);

	logical_ring_default_irqs(engine);



	intel_engine_init_hangcheck(engine);

	i915_gem_batch_pool_init(&dev_priv->drm, &engine->batch_pool);
@@ -2205,14 +2217,14 @@ int intel_logical_rings_init(struct drm_device *dev) 
	WARN_ON(INTEL_INFO(dev_priv)->ring_mask &

		GENMASK(sizeof(mask) * BITS_PER_BYTE - 1, I915_NUM_ENGINES));



	for (i = 0; i < ARRAY_SIZE(logical_rings); i++) {

	for (i = 0; i < ARRAY_SIZE(intel_engines); i++) {

		if (!HAS_ENGINE(dev_priv, i))

			continue;



		if (!logical_rings[i].init)

		if (!intel_engines[i].init)

			continue;



		ret = logical_rings[i].init(logical_ring_setup(dev_priv, i));

		ret = intel_engines[i].init(logical_ring_setup(dev_priv, i));

		if (ret)

			goto cleanup;
@@ -2220,7 +2232,7 @@ int intel_logical_rings_init(struct drm_device *dev) 
	}



	/*

	 * Catch failures to update logical_rings table when the new engines

	 * Catch failures to update intel_engines table when the new engines

	 * are added to the driver by a warning and disabling the forgotten

	 * engines.

	 */

drivers/gpu/drm/i915/intel_ringbuffer.c

+10 −30
Original line number Diff line number Diff line
@@ -2839,14 +2839,10 @@ static void intel_ring_default_vfuncs(struct drm_i915_private *dev_priv, 
int intel_init_render_ring_buffer(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = to_i915(dev);

	struct intel_engine_cs *engine = &dev_priv->engine[RCS];

	struct intel_engine_cs *engine;

	int ret;



	engine->name = "render ring";

	engine->id = RCS;

	engine->exec_id = I915_EXEC_RENDER;

	engine->hw_id = 0;

	engine->mmio_base = RENDER_RING_BASE;

	engine = intel_engine_setup(dev_priv, RCS);



	intel_ring_default_vfuncs(dev_priv, engine);
@@ -2901,17 +2897,13 @@ int intel_init_render_ring_buffer(struct drm_device *dev) 
int intel_init_bsd_ring_buffer(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = to_i915(dev);

	struct intel_engine_cs *engine = &dev_priv->engine[VCS];

	struct intel_engine_cs *engine;



	engine->name = "bsd ring";

	engine->id = VCS;

	engine->exec_id = I915_EXEC_BSD;

	engine->hw_id = 1;

	engine = intel_engine_setup(dev_priv, VCS);



	intel_ring_default_vfuncs(dev_priv, engine);



	if (INTEL_GEN(dev_priv) >= 6) {

		engine->mmio_base = GEN6_BSD_RING_BASE;

		/* gen6 bsd needs a special wa for tail updates */

		if (IS_GEN6(dev_priv))

			engine->write_tail = gen6_bsd_ring_write_tail;
@@ -2939,13 +2931,9 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev) 
int intel_init_bsd2_ring_buffer(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = to_i915(dev);

	struct intel_engine_cs *engine = &dev_priv->engine[VCS2];

	struct intel_engine_cs *engine;



	engine->name = "bsd2 ring";

	engine->id = VCS2;

	engine->exec_id = I915_EXEC_BSD;

	engine->hw_id = 4;

	engine->mmio_base = GEN8_BSD2_RING_BASE;

	engine = intel_engine_setup(dev_priv, VCS2);



	intel_ring_default_vfuncs(dev_priv, engine);
@@ -2959,13 +2947,9 @@ int intel_init_bsd2_ring_buffer(struct drm_device *dev) 
int intel_init_blt_ring_buffer(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = to_i915(dev);

	struct intel_engine_cs *engine = &dev_priv->engine[BCS];

	struct intel_engine_cs *engine;



	engine->name = "blitter ring";

	engine->id = BCS;

	engine->exec_id = I915_EXEC_BLT;

	engine->hw_id = 2;

	engine->mmio_base = BLT_RING_BASE;

	engine = intel_engine_setup(dev_priv, BCS);



	intel_ring_default_vfuncs(dev_priv, engine);
@@ -2982,13 +2966,9 @@ int intel_init_blt_ring_buffer(struct drm_device *dev) 
int intel_init_vebox_ring_buffer(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = to_i915(dev);

	struct intel_engine_cs *engine = &dev_priv->engine[VECS];

	struct intel_engine_cs *engine;



	engine->name = "video enhancement ring";

	engine->id = VECS;

	engine->exec_id = I915_EXEC_VEBOX;

	engine->hw_id = 3;

	engine->mmio_base = VEBOX_RING_BASE;

	engine = intel_engine_setup(dev_priv, VECS);



	intel_ring_default_vfuncs(dev_priv, engine);

drivers/gpu/drm/i915/intel_ringbuffer.h

+5 −0
Original line number Diff line number Diff line
@@ -147,6 +147,7 @@ struct intel_engine_cs { 
	unsigned int hw_id;

	unsigned int guc_id; /* XXX same as hw_id? */

	u32		mmio_base;

	unsigned int irq_shift;

	struct intel_ringbuffer *buffer;

	struct list_head buffers;
@@ -361,6 +362,10 @@ struct intel_engine_cs { 
	u32 (*get_cmd_length_mask)(u32 cmd_header);

};



struct intel_engine_cs *

intel_engine_setup(struct drm_i915_private *dev_priv,

		   enum intel_engine_id id);



static inline bool

intel_engine_initialized(const struct intel_engine_cs *engine)

{