On 09/22/2017 06:15 AM, Rodrigo Vivi wrote:
CNL adds an extra register for slice/subslice information.
Although no SKU is planed with an extra slice let's already
handle this extra piece of information so we don't have the
risk in future of getting a part that might have chosen this
part of the die instead of other slices or anything like that.
Also if subslice is disabled the information of eu ack for that
is garbage, so let's skip checks for eu if subslice is disabled
as we skip the subslice if slice is disabled.
The rest is pretty much like gen9.
v2: Remove IS_CANNONLAKE from gen9 status function.
v3: Consider s_max = 6 and ss_max=4 to run over all possible
slices and subslices possible by spec. Although no real
hardware will have that many slices/subslices.
To match with sseu info init.
v4: Fix offset calculation for slices 4 and 5.
Removed Oscar's rv-b since this change also needs review.
Cc: Oscar Mateo <oscar.mateo@xxxxxxxxx>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 54 +++++++++++++++++++++++++++++++++++--
drivers/gpu/drm/i915/i915_reg.h | 6 +++++
2 files changed, 58 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index ca6fa6d122c6..e197e5d99277 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4575,6 +4575,54 @@ static void cherryview_sseu_device_status(struct drm_i915_private *dev_priv,
}
}
+static void gen10_sseu_device_status(struct drm_i915_private *dev_priv,
+ struct sseu_dev_info *sseu)
+{
+ const struct intel_device_info *info = INTEL_INFO(dev_priv);
+ int s_max = 6, ss_max = 4;
+ int s, ss;
+ u32 s_reg[s_max], eu_reg[2 * s_max], eu_mask[2];
+
+ for (s = 0; s < s_max; s++) {
+ s_reg[s] = I915_READ(GEN10_SLICE_PGCTL_ACK(s));
+ eu_reg[2 * s] = I915_READ(GEN10_SS01_EU_PGCTL_ACK(s));
+ eu_reg[2 * s + 1] = I915_READ(GEN10_SS23_EU_PGCTL_ACK(s));
+ }
+
+ eu_mask[0] = GEN9_PGCTL_SSA_EU08_ACK |
+ GEN9_PGCTL_SSA_EU19_ACK |
+ GEN9_PGCTL_SSA_EU210_ACK |
+ GEN9_PGCTL_SSA_EU311_ACK;
+ eu_mask[1] = GEN9_PGCTL_SSB_EU08_ACK |
+ GEN9_PGCTL_SSB_EU19_ACK |
+ GEN9_PGCTL_SSB_EU210_ACK |
+ GEN9_PGCTL_SSB_EU311_ACK;
+
+ for (s = 0; s < s_max; s++) {
+ if ((s_reg[s] & GEN9_PGCTL_SLICE_ACK) == 0)
+ /* skip disabled slice */
+ continue;
+
+ sseu->slice_mask |= BIT(s);
+ sseu->subslice_mask = info->sseu.subslice_mask;
+
+ for (ss = 0; ss < ss_max; ss++) {
+ unsigned int eu_cnt;
+
+ if (!(s_reg[s] & (GEN9_PGCTL_SS_ACK(ss))))
+ /* skip disabled subslice */
+ continue;
You are going to hate me, but I found something else:
SLICE0_PGCTL_ACK has powergate acknowledge bits for subslices 0, 1 & 2,
but not for subslice 3
SLICEn_PGCTL_ACK (where n = 1-5) has powergate acknowledge bits for
subslices 0 & 1, but not for subslices 2 & 3
I have no idea where the missing bits went (maybe the BSpec is wrong?).
+
+ eu_cnt = 2 * hweight32(eu_reg[2 * s + ss / 2] &
+ eu_mask[ss % 2]);
+ sseu->eu_total += eu_cnt;
+ sseu->eu_per_subslice = max_t(unsigned int,
+ sseu->eu_per_subslice,
+ eu_cnt);
+ }
+ }
+}
+
static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
struct sseu_dev_info *sseu)
{
@@ -4610,7 +4658,7 @@ static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
sseu->slice_mask |= BIT(s);
- if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv))
+ if (IS_GEN9_BC(dev_priv))
sseu->subslice_mask =
INTEL_INFO(dev_priv)->sseu.subslice_mask;
@@ -4716,8 +4764,10 @@ static int i915_sseu_status(struct seq_file *m, void *unused)
cherryview_sseu_device_status(dev_priv, &sseu);
} else if (IS_BROADWELL(dev_priv)) {
broadwell_sseu_device_status(dev_priv, &sseu);
- } else if (INTEL_GEN(dev_priv) >= 9) {
+ } else if (IS_GEN9(dev_priv)) {
gen9_sseu_device_status(dev_priv, &sseu);
+ } else if (INTEL_GEN(dev_priv) >= 10) {
+ gen10_sseu_device_status(dev_priv, &sseu);
}
intel_runtime_pm_put(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 1c257797c583..9729145e6c03 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8020,11 +8020,17 @@ enum {
#define CHV_EU311_PG_ENABLE (1<<1)
#define GEN9_SLICE_PGCTL_ACK(slice) _MMIO(0x804c + (slice)*0x4)
+#define GEN10_SLICE_PGCTL_ACK(slice) _MMIO(0x804c + ((slice) / 3) * 0x34 + \
+ ((slice) % 3) * 0x4)
#define GEN9_PGCTL_SLICE_ACK (1 << 0)
#define GEN9_PGCTL_SS_ACK(subslice) (1 << (2 + (subslice)*2))
#define GEN9_SS01_EU_PGCTL_ACK(slice) _MMIO(0x805c + (slice)*0x8)
+#define GEN10_SS01_EU_PGCTL_ACK(slice) _MMIO(0x805c + ((slice) / 3) * 0x30 + \
+ ((slice) % 3) * 0x8)
#define GEN9_SS23_EU_PGCTL_ACK(slice) _MMIO(0x8060 + (slice)*0x8)
+#define GEN10_SS23_EU_PGCTL_ACK(slice) _MMIO(0x8060 + ((slice) / 3) * 0x30 + \
+ ((slice) % 3) * 0x8)
#define GEN9_PGCTL_SSA_EU08_ACK (1 << 0)
#define GEN9_PGCTL_SSA_EU19_ACK (1 << 2)
#define GEN9_PGCTL_SSA_EU210_ACK (1 << 4)
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