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From: Stuart Summers <stuart.summers@intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 2/6] drm/i915: Add macro for SSEU stride calculation
Date: Tue, 30 Apr 2019 16:06:02 -0700	[thread overview]
Message-ID: <20190430230606.8421-3-stuart.summers@intel.com> (raw)
In-Reply-To: <20190430230606.8421-1-stuart.summers@intel.com>

Subslice stride and EU stride are calculated multiple times in
i915_query. Move this calculation to a macro to reduce code duplication.

v2: update headers in intel_sseu.h

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Stuart Summers <stuart.summers@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_sseu.h |  2 ++
 drivers/gpu/drm/i915/i915_query.c    | 17 ++++++++---------
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.h b/drivers/gpu/drm/i915/gt/intel_sseu.h
index 73bc824094e8..c0b16b248d4c 100644
--- a/drivers/gpu/drm/i915/gt/intel_sseu.h
+++ b/drivers/gpu/drm/i915/gt/intel_sseu.h
@@ -8,11 +8,13 @@
 #define __INTEL_SSEU_H__
 
 #include <linux/types.h>
+#include <linux/kernel.h>
 
 struct drm_i915_private;
 
 #define GEN_MAX_SLICES		(6) /* CNL upper bound */
 #define GEN_MAX_SUBSLICES	(8) /* ICL upper bound */
+#define GEN_SSEU_STRIDE(bits) DIV_ROUND_UP(bits, BITS_PER_BYTE)
 
 struct sseu_dev_info {
 	u8 slice_mask;
diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
index 782183b78f49..7c1708c22811 100644
--- a/drivers/gpu/drm/i915/i915_query.c
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -37,6 +37,8 @@ static int query_topology_info(struct drm_i915_private *dev_priv,
 	const struct sseu_dev_info *sseu = &RUNTIME_INFO(dev_priv)->sseu;
 	struct drm_i915_query_topology_info topo;
 	u32 slice_length, subslice_length, eu_length, total_length;
+	u8 subslice_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
+	u8 eu_stride = GEN_SSEU_STRIDE(sseu->max_eus_per_subslice);
 	int ret;
 
 	if (query_item->flags != 0)
@@ -48,12 +50,10 @@ static int query_topology_info(struct drm_i915_private *dev_priv,
 	BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
 
 	slice_length = sizeof(sseu->slice_mask);
-	subslice_length = sseu->max_slices *
-		DIV_ROUND_UP(sseu->max_subslices, BITS_PER_BYTE);
-	eu_length = sseu->max_slices * sseu->max_subslices *
-		DIV_ROUND_UP(sseu->max_eus_per_subslice, BITS_PER_BYTE);
-
-	total_length = sizeof(topo) + slice_length + subslice_length + eu_length;
+	subslice_length = sseu->max_slices * subslice_stride;
+	eu_length = sseu->max_slices * sseu->max_subslices * eu_stride;
+	total_length = sizeof(topo) + slice_length + subslice_length +
+		       eu_length;
 
 	ret = copy_query_item(&topo, sizeof(topo), total_length,
 			      query_item);
@@ -69,10 +69,9 @@ static int query_topology_info(struct drm_i915_private *dev_priv,
 	topo.max_eus_per_subslice = sseu->max_eus_per_subslice;
 
 	topo.subslice_offset = slice_length;
-	topo.subslice_stride = DIV_ROUND_UP(sseu->max_subslices, BITS_PER_BYTE);
+	topo.subslice_stride = subslice_stride;
 	topo.eu_offset = slice_length + subslice_length;
-	topo.eu_stride =
-		DIV_ROUND_UP(sseu->max_eus_per_subslice, BITS_PER_BYTE);
+	topo.eu_stride = eu_stride;
 
 	if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr),
 			   &topo, sizeof(topo)))
-- 
2.21.0.5.gaeb582a983

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  parent reply	other threads:[~2019-04-30 23:06 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-30 23:06 [PATCH 0/6] Refactor to expand subslice mask Stuart Summers
2019-04-30 23:06 ` [PATCH 1/6] drm/i915: Use local variable for SSEU info in GETPARAM ioctl Stuart Summers
2019-05-01  0:44   ` Stuart Summers
2019-04-30 23:06 ` Stuart Summers [this message]
2019-04-30 23:06 ` [PATCH 3/6] drm/i915: Move calculation of subslices per slice to new function Stuart Summers
2019-04-30 23:06 ` [PATCH 4/6] drm/i915: Move sseu helper functions to intel_sseu.h Stuart Summers
2019-04-30 23:06 ` [PATCH 5/6] drm/i915: Remove inline from sseu helper functions Stuart Summers
2019-04-30 23:06 ` [PATCH 6/6] drm/i915: Expand subslice mask Stuart Summers
2019-04-30 23:13 ` ✗ Fi.CI.CHECKPATCH: warning for Refactor to expand subslice mask (rev5) Patchwork
2019-04-30 23:16 ` ✗ Fi.CI.SPARSE: " Patchwork
2019-05-01  0:00 ` ✓ Fi.CI.BAT: success " Patchwork
2019-05-01  0:58 ` ✗ Fi.CI.BAT: failure for Refactor to expand subslice mask (rev6) Patchwork
2019-05-01 15:36   ` Summers, Stuart
  -- strict thread matches above, loose matches on Subject: below --
2019-05-01 15:34 [PATCH 0/6] Refactor to expand subslice mask Stuart Summers
2019-05-01 15:34 ` [PATCH 2/6] drm/i915: Add macro for SSEU stride calculation Stuart Summers
2019-05-01 18:11   ` Daniele Ceraolo Spurio
2019-05-01 19:37     ` Summers, Stuart

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