[Intel-gfx] [RFC] drm/i915: store all mmio bases in intel_engines
Daniele Ceraolo Spurio
daniele.ceraolospurio at intel.com
Wed Mar 7 19:45:15 UTC 2018
The mmio bases we're currently storing in the intel_engines array are
only valid for a subset of gens, so we need to ignore them and use
different values in some cases. Instead of doing that, we can have a
table of [starting gen, mmio base] pairs for each engine in
intel_engines and select the correct one based on the gen we're running
on in a consistent way.
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
---
drivers/gpu/drm/i915/intel_engine_cs.c | 77 +++++++++++++++++++++------------
drivers/gpu/drm/i915/intel_ringbuffer.c | 1 -
2 files changed, 49 insertions(+), 29 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 4ba139c27fba..1dd92cac8d67 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -81,12 +81,16 @@ static const struct engine_class_info intel_engine_classes[] = {
},
};
+#define MAX_MMIO_BASES 3
struct engine_info {
unsigned int hw_id;
unsigned int uabi_id;
u8 class;
u8 instance;
- u32 mmio_base;
+ struct engine_mmio_base {
+ u32 gen : 8;
+ u32 base : 24;
+ } mmio_bases[MAX_MMIO_BASES];
unsigned irq_shift;
};
@@ -96,7 +100,9 @@ static const struct engine_info intel_engines[] = {
.uabi_id = I915_EXEC_RENDER,
.class = RENDER_CLASS,
.instance = 0,
- .mmio_base = RENDER_RING_BASE,
+ .mmio_bases = {
+ { .gen = 1, .base = RENDER_RING_BASE }
+ },
.irq_shift = GEN8_RCS_IRQ_SHIFT,
},
[BCS] = {
@@ -104,7 +110,9 @@ static const struct engine_info intel_engines[] = {
.uabi_id = I915_EXEC_BLT,
.class = COPY_ENGINE_CLASS,
.instance = 0,
- .mmio_base = BLT_RING_BASE,
+ .mmio_bases = {
+ { .gen = 6, .base = BLT_RING_BASE }
+ },
.irq_shift = GEN8_BCS_IRQ_SHIFT,
},
[VCS] = {
@@ -112,7 +120,11 @@ static const struct engine_info intel_engines[] = {
.uabi_id = I915_EXEC_BSD,
.class = VIDEO_DECODE_CLASS,
.instance = 0,
- .mmio_base = GEN6_BSD_RING_BASE,
+ .mmio_bases = {
+ { .gen = 11, .base = GEN11_BSD_RING_BASE },
+ { .gen = 6, .base = GEN6_BSD_RING_BASE },
+ { .gen = 4, .base = BSD_RING_BASE }
+ },
.irq_shift = GEN8_VCS1_IRQ_SHIFT,
},
[VCS2] = {
@@ -120,7 +132,10 @@ static const struct engine_info intel_engines[] = {
.uabi_id = I915_EXEC_BSD,
.class = VIDEO_DECODE_CLASS,
.instance = 1,
- .mmio_base = GEN8_BSD2_RING_BASE,
+ .mmio_bases = {
+ { .gen = 11, .base = GEN11_BSD2_RING_BASE },
+ { .gen = 8, .base = GEN8_BSD2_RING_BASE }
+ },
.irq_shift = GEN8_VCS2_IRQ_SHIFT,
},
[VCS3] = {
@@ -128,7 +143,9 @@ static const struct engine_info intel_engines[] = {
.uabi_id = I915_EXEC_BSD,
.class = VIDEO_DECODE_CLASS,
.instance = 2,
- .mmio_base = GEN11_BSD3_RING_BASE,
+ .mmio_bases = {
+ { .gen = 11, .base = GEN11_BSD3_RING_BASE }
+ },
.irq_shift = 0, /* not used */
},
[VCS4] = {
@@ -136,7 +153,9 @@ static const struct engine_info intel_engines[] = {
.uabi_id = I915_EXEC_BSD,
.class = VIDEO_DECODE_CLASS,
.instance = 3,
- .mmio_base = GEN11_BSD4_RING_BASE,
+ .mmio_bases = {
+ { .gen = 11, .base = GEN11_BSD4_RING_BASE }
+ },
.irq_shift = 0, /* not used */
},
[VECS] = {
@@ -144,7 +163,10 @@ static const struct engine_info intel_engines[] = {
.uabi_id = I915_EXEC_VEBOX,
.class = VIDEO_ENHANCEMENT_CLASS,
.instance = 0,
- .mmio_base = VEBOX_RING_BASE,
+ .mmio_bases = {
+ { .gen = 11, .base = GEN11_VEBOX_RING_BASE },
+ { .gen = 7, .base = VEBOX_RING_BASE }
+ },
.irq_shift = GEN8_VECS_IRQ_SHIFT,
},
[VECS2] = {
@@ -152,7 +174,9 @@ static const struct engine_info intel_engines[] = {
.uabi_id = I915_EXEC_VEBOX,
.class = VIDEO_ENHANCEMENT_CLASS,
.instance = 1,
- .mmio_base = GEN11_VEBOX2_RING_BASE,
+ .mmio_bases = {
+ { .gen = 11, .base = GEN11_VEBOX2_RING_BASE }
+ },
.irq_shift = 0, /* not used */
},
};
@@ -223,6 +247,21 @@ __intel_engine_context_size(struct drm_i915_private *dev_priv, u8 class)
}
}
+static u32 __engine_mmio_base(struct drm_i915_private *i915,
+ const struct engine_mmio_base* bases)
+{
+ int i;
+
+ for (i = 0; i < MAX_MMIO_BASES; i++)
+ if (INTEL_GEN(i915) >= bases[i].gen)
+ break;
+
+ GEM_BUG_ON(i == MAX_MMIO_BASES);
+ GEM_BUG_ON(!bases[i].base);
+
+ return bases[i].base;
+}
+
static int
intel_engine_setup(struct drm_i915_private *dev_priv,
enum intel_engine_id id)
@@ -257,25 +296,7 @@ intel_engine_setup(struct drm_i915_private *dev_priv,
class_info->name, info->instance) >=
sizeof(engine->name));
engine->hw_id = engine->guc_id = info->hw_id;
- if (INTEL_GEN(dev_priv) >= 11) {
- switch (engine->id) {
- case VCS:
- engine->mmio_base = GEN11_BSD_RING_BASE;
- break;
- case VCS2:
- engine->mmio_base = GEN11_BSD2_RING_BASE;
- break;
- case VECS:
- engine->mmio_base = GEN11_VEBOX_RING_BASE;
- break;
- default:
- /* take the original value for all other engines */
- engine->mmio_base = info->mmio_base;
- break;
- }
- } else {
- engine->mmio_base = info->mmio_base;
- }
+ engine->mmio_base = __engine_mmio_base(dev_priv, info->mmio_bases);
engine->irq_shift = info->irq_shift;
engine->class = info->class;
engine->instance = info->instance;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 1d599524a759..2e4408477ab5 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2079,7 +2079,6 @@ int intel_init_bsd_ring_buffer(struct intel_engine_cs *engine)
engine->emit_flush = gen6_bsd_ring_flush;
engine->irq_enable_mask = GT_BSD_USER_INTERRUPT;
} else {
- engine->mmio_base = BSD_RING_BASE;
engine->emit_flush = bsd_ring_flush;
if (IS_GEN5(dev_priv))
engine->irq_enable_mask = ILK_BSD_USER_INTERRUPT;
--
2.16.2
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