On 23/07/2019 16:49, Stuart Summers wrote:
Add a new function to allow each platform to set maximum
slice, subslice, and EU information to reduce code duplication.
Signed-off-by: Stuart Summers <stuart.summ...@intel.com>
---
drivers/gpu/drm/i915/gt/intel_sseu.c | 8 +++++
drivers/gpu/drm/i915/gt/intel_sseu.h | 3 ++
drivers/gpu/drm/i915/i915_debugfs.c | 6 ++--
drivers/gpu/drm/i915/intel_device_info.c | 39 +++++++++---------------
4 files changed, 28 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.c
b/drivers/gpu/drm/i915/gt/intel_sseu.c
index a0756f006f5f..08b74ae40739 100644
--- a/drivers/gpu/drm/i915/gt/intel_sseu.c
+++ b/drivers/gpu/drm/i915/gt/intel_sseu.c
@@ -8,6 +8,14 @@
#include "intel_lrc_reg.h"
#include "intel_sseu.h"
+void intel_sseu_set_info(struct sseu_dev_info *sseu, u8 max_slices,
+ u8 max_subslices, u8 max_eus_per_subslice)
+{
+ sseu->max_slices = max_slices;
+ sseu->max_subslices = max_subslices;
+ sseu->max_eus_per_subslice = max_eus_per_subslice;
+}
Static inline in header since it is so trivial?
Is the term "info" established in this space? I am thinking if just
intel_sseu_set would be enough? Or set_topology? Although it is not a
full topology.. don't know.
+
unsigned int
intel_sseu_subslice_total(const struct sseu_dev_info *sseu)
{
diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.h
b/drivers/gpu/drm/i915/gt/intel_sseu.h
index b50d0401a4e2..64e47dad07be 100644
--- a/drivers/gpu/drm/i915/gt/intel_sseu.h
+++ b/drivers/gpu/drm/i915/gt/intel_sseu.h
@@ -63,6 +63,9 @@ intel_sseu_from_device_info(const struct sseu_dev_info *sseu)
return value;
}
+void intel_sseu_set_info(struct sseu_dev_info *sseu, u8 max_slices,
+ u8 max_subslices, u8 max_eus_per_subslice);
+
unsigned int
intel_sseu_subslice_total(const struct sseu_dev_info *sseu);
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 14eadab4209b..011ed2fd391d 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4034,9 +4034,9 @@ static int i915_sseu_status(struct seq_file *m, void
*unused)
seq_puts(m, "SSEU Device Status\n");
memset(&sseu, 0, sizeof(sseu));
- sseu.max_slices = info->sseu.max_slices;
- sseu.max_subslices = info->sseu.max_subslices;
- sseu.max_eus_per_subslice = info->sseu.max_eus_per_subslice;
+ intel_sseu_set_info(&sseu, info->sseu.max_slices,
+ info->sseu.max_subslices,
+ info->sseu.max_eus_per_subslice);
with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref) {
if (IS_CHERRYVIEW(dev_priv))
diff --git a/drivers/gpu/drm/i915/intel_device_info.c
b/drivers/gpu/drm/i915/intel_device_info.c
index f99c9fd497b2..9a79d9d547c5 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -191,15 +191,10 @@ static void gen11_sseu_info_init(struct drm_i915_private
*dev_priv)
u8 eu_en;
int s;
- if (IS_ELKHARTLAKE(dev_priv)) {
- sseu->max_slices = 1;
- sseu->max_subslices = 4;
- sseu->max_eus_per_subslice = 8;
- } else {
- sseu->max_slices = 1;
- sseu->max_subslices = 8;
- sseu->max_eus_per_subslice = 8;
- }
+ if (IS_ELKHARTLAKE(dev_priv))
+ intel_sseu_set_info(sseu, 1, 4, 8);
+ else
+ intel_sseu_set_info(sseu, 1, 8, 8);
s_en = I915_READ(GEN11_GT_SLICE_ENABLE) & GEN11_GT_S_ENA_MASK;
ss_en = ~I915_READ(GEN11_GT_SUBSLICE_DISABLE);
@@ -236,11 +231,10 @@ static void gen10_sseu_info_init(struct drm_i915_private
*dev_priv)
const int eu_mask = 0xff;
u32 subslice_mask, eu_en;
+ intel_sseu_set_info(sseu, 6, 4, 8);
+
sseu->slice_mask = (fuse2 & GEN10_F2_S_ENA_MASK) >>
GEN10_F2_S_ENA_SHIFT;
Right, so intel_sseu_set_info sets some bits but not all. I guess
topology is then definitely the wrong name. intel_sseu_set_sseu is what
it does :), so the final suffix might be redundant be it info or sseu.
As you prefer.
- sseu->max_slices = 6;
- sseu->max_subslices = 4;
- sseu->max_eus_per_subslice = 8;
subslice_mask = (1 << 4) - 1;
subslice_mask &= ~((fuse2 & GEN10_F2_SS_DIS_MASK) >>
@@ -314,9 +308,7 @@ static void cherryview_sseu_info_init(struct
drm_i915_private *dev_priv)
fuse = I915_READ(CHV_FUSE_GT);
sseu->slice_mask = BIT(0);
- sseu->max_slices = 1;
- sseu->max_subslices = 2;
- sseu->max_eus_per_subslice = 8;
+ intel_sseu_set_info(sseu, 1, 2, 8);
if (!(fuse & CHV_FGT_DISABLE_SS0)) {
u8 disabled_mask =
@@ -372,9 +364,8 @@ static void gen9_sseu_info_init(struct drm_i915_private
*dev_priv)
sseu->slice_mask = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT;
/* BXT has a single slice and at most 3 subslices. */
- sseu->max_slices = IS_GEN9_LP(dev_priv) ? 1 : 3;
- sseu->max_subslices = IS_GEN9_LP(dev_priv) ? 3 : 4;
- sseu->max_eus_per_subslice = 8;
+ intel_sseu_set_info(sseu, IS_GEN9_LP(dev_priv) ? 1 : 3,
+ IS_GEN9_LP(dev_priv) ? 3 : 4, 8);
So far it all improved readability but not here. I think here
if (IS_GEN9_LP(dev_priv))
intel_sseu_set(...);
else
intel_sseu_set(...);
Would be cleaner.
/*
* The subslice disable field is global, i.e. it applies
@@ -473,9 +464,7 @@ static void broadwell_sseu_info_init(struct
drm_i915_private *dev_priv)
fuse2 = I915_READ(GEN8_FUSE2);
sseu->slice_mask = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT;
- sseu->max_slices = 3;
- sseu->max_subslices = 3;
- sseu->max_eus_per_subslice = 8;
+ intel_sseu_set_info(sseu, 3, 3, 8);
/*
* The subslice disable field is global, i.e. it applies
@@ -577,9 +566,6 @@ static void haswell_sseu_info_init(struct drm_i915_private
*dev_priv)
break;
}
- sseu->max_slices = hweight8(sseu->slice_mask);
- sseu->max_subslices = hweight8(sseu->subslice_mask[0]);
-
fuse1 = I915_READ(HSW_PAVP_FUSE1);
switch ((fuse1 & HSW_F1_EU_DIS_MASK) >> HSW_F1_EU_DIS_SHIFT) {
default:
@@ -596,7 +582,10 @@ static void haswell_sseu_info_init(struct drm_i915_private
*dev_priv)
sseu->eu_per_subslice = 6;
break;
}
- sseu->max_eus_per_subslice = sseu->eu_per_subslice;
+
+ intel_sseu_set_info(sseu, hweight8(sseu->slice_mask),
+ hweight8(sseu->subslice_mask[0]),
+ sseu->eu_per_subslice);
for (s = 0; s < sseu->max_slices; s++) {
for (ss = 0; ss < sseu->max_subslices; ss++) {
Overall looks like a readability improvement. Some tweaks or not as
mentioned above can be discussed.
Regards,
Tvrtko
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