Re: [PATCH 06/27] drm/i915/icl: Prepare for more rings

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On 1/9/2018 3:23 PM, Paulo Zanoni wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

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@xxxxxxxxx>
Reviewed-by: Oscar Mateo <oscar.mateo@xxxxxxxxx>

My r-b stands. I also have an s-o-b, but IIRC the only thing I did to this patch was rebasing it on upstream at some point.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Oscar Mateo <oscar.mateo@xxxxxxxxx>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
  drivers/gpu/drm/i915/i915_drv.h          | 3 +++
  drivers/gpu/drm/i915/i915_gem.h          | 2 +-
  drivers/gpu/drm/i915/i915_reg.h          | 5 ++++-
  drivers/gpu/drm/i915/intel_device_info.c | 3 +++
  drivers/gpu/drm/i915/intel_device_info.h | 4 +++-
  drivers/gpu/drm/i915/intel_ringbuffer.h  | 9 ++++++++-
  6 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 016920f58ae6..bcd8301456f7 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2719,6 +2719,9 @@ 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) \
diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h
index e920dab7f1b8..1b61b7f8c2ec 100644
--- a/drivers/gpu/drm/i915/i915_gem.h
+++ b/drivers/gpu/drm/i915/i915_gem.h
@@ -54,6 +54,6 @@
  #define GEM_TRACE(...) do { } while (0)
  #endif
-#define I915_NUM_ENGINES 5
+#define I915_NUM_ENGINES 8
#endif /* __I915_GEM_H__ */
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 039ad46a4434..b342d30152ca 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/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 */ diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index a2c16140169f..25448e38ee76 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -489,6 +489,9 @@ 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
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 9542018d11d0..980893a9e5e9 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/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;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index c5ff203e42d6..d0b22753d26e 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -158,6 +158,9 @@ struct i915_ctx_workarounds {
struct drm_i915_gem_request; +#define I915_MAX_VCS 4
+#define I915_MAX_VECS	2
+
  /*
   * Engine IDs definitions.
   * Keep instances of the same type engine together.
@@ -167,8 +170,12 @@ 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 {

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