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drm/i915: sseu: Convert slice count field to mask 

In an upcoming patch we'll need the actual mask of slices in addition to
their count, so replace the count field with a mask.

v2:
- Use hweight8() on u8 typed vars instead of hweight32(). (Ben)

Reviewed-by: Robert Bragg <robert@sixbynine.org> (v1)
Reviewed-by: Ben Widawsky <benjamin.widawsky@intel.com> (v1)
Tested-by: Ben Widawsky <benjamin.widawsky@intel.com> (v1)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1472659987-10417-5-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak 2016-08-31 19:13:04 +03:00
parent 615d8908ac
commit f08a0c9234
4 changed files with 23 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -5007,7 +5007,7 @@ static void cherryview_sseu_device_status(struct drm_i915_private *dev_priv,
/* skip disabled subslice */
continue;
sseu->slice_total = 1;
sseu->slice_mask = BIT(0);
sseu->subslice_per_slice++;
eu_cnt = ((sig1[ss] & CHV_EU08_PG_ENABLE) ? 0 : 2) +
((sig1[ss] & CHV_EU19_PG_ENABLE) ? 0 : 2) +
@ -5055,7 +5055,7 @@ static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
/* skip disabled slice */
continue;
sseu->slice_total++;
sseu->slice_mask |= BIT(s);
if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
ss_cnt = INTEL_INFO(dev_priv)->sseu.subslice_per_slice;
@ -5092,19 +5092,19 @@ static void broadwell_sseu_device_status(struct drm_i915_private *dev_priv,
u32 slice_info = I915_READ(GEN8_GT_SLICE_INFO);
int s;
sseu->slice_total = hweight32(slice_info & GEN8_LSLICESTAT_MASK);
sseu->slice_mask = slice_info & GEN8_LSLICESTAT_MASK;
if (sseu->slice_total) {
if (sseu->slice_mask) {
sseu->subslice_per_slice =
INTEL_INFO(dev_priv)->sseu.subslice_per_slice;
sseu->subslice_total = sseu->slice_total *
sseu->subslice_total = hweight8(sseu->slice_mask) *
sseu->subslice_per_slice;
sseu->eu_per_subslice =
INTEL_INFO(dev_priv)->sseu.eu_per_subslice;
sseu->eu_total = sseu->eu_per_subslice * sseu->subslice_total;
/* subtract fused off EU(s) from enabled slice(s) */
for (s = 0; s < sseu->slice_total; s++) {
for (s = 0; s < hweight8(sseu->slice_mask); s++) {
u8 subslice_7eu =
INTEL_INFO(dev_priv)->sseu.subslice_7eu[s];
@ -5120,7 +5120,7 @@ static void i915_print_sseu_info(struct seq_file *m, bool is_available_info,
const char *type = is_available_info ? "Available" : "Enabled";
seq_printf(m, " %s Slice Total: %u\n", type,
sseu->slice_total);
hweight8(sseu->slice_mask));
seq_printf(m, " %s Subslice Total: %u\n", type,
sseu->subslice_total);
seq_printf(m, " %s Subslice Per Slice: %u\n", type,

2
drivers/gpu/drm/i915/i915_drv.h
View File

@ -672,7 +672,7 @@ struct intel_csr {
#define SEP_SEMICOLON ;
struct sseu_dev_info {
u8 slice_total;
u8 slice_mask;
u8 subslice_total;
u8 subslice_per_slice;
u8 eu_total;

29
drivers/gpu/drm/i915/intel_device_info.c
View File

@ -51,7 +51,7 @@ static void cherryview_sseu_info_init(struct drm_i915_private *dev_priv)
fuse = I915_READ(CHV_FUSE_GT);
sseu->slice_total = 1;
sseu->slice_mask = BIT(0);
if (!(fuse & CHV_FGT_DISABLE_SS0)) {
sseu->subslice_per_slice++;
@ -91,27 +91,27 @@ static void gen9_sseu_info_init(struct drm_i915_private *dev_priv)
struct sseu_dev_info *sseu = &info->sseu;
int s_max = 3, ss_max = 4, eu_max = 8;
int s, ss;
u32 fuse2, s_enable, ss_disable, eu_disable;
u32 fuse2, ss_disable, eu_disable;
u8 eu_mask = 0xff;
fuse2 = I915_READ(GEN8_FUSE2);
s_enable = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT;
sseu->slice_mask = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT;
ss_disable = (fuse2 & GEN9_F2_SS_DIS_MASK) >> GEN9_F2_SS_DIS_SHIFT;
sseu->slice_total = hweight32(s_enable);
/*
* The subslice disable field is global, i.e. it applies
* to each of the enabled slices.
*/
sseu->subslice_per_slice = ss_max - hweight32(ss_disable);
sseu->subslice_total = sseu->slice_total * sseu->subslice_per_slice;
sseu->subslice_total = hweight8(sseu->slice_mask) *
sseu->subslice_per_slice;
/*
* Iterate through enabled slices and subslices to
* count the total enabled EU.
*/
for (s = 0; s < s_max; s++) {
if (!(s_enable & BIT(s)))
if (!(sseu->slice_mask & BIT(s)))
/* skip disabled slice */
continue;
@ -158,7 +158,7 @@ static void gen9_sseu_info_init(struct drm_i915_private *dev_priv)
*/
sseu->has_slice_pg =
(IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) &&
sseu->slice_total > 1;
hweight8(sseu->slice_mask) > 1;
sseu->has_subslice_pg =
IS_BROXTON(dev_priv) && sseu->subslice_total > 1;
sseu->has_eu_pg = sseu->eu_per_subslice > 2;
@ -195,10 +195,10 @@ static void broadwell_sseu_info_init(struct drm_i915_private *dev_priv)
struct sseu_dev_info *sseu = &mkwrite_device_info(dev_priv)->sseu;
const int s_max = 3, ss_max = 3, eu_max = 8;
int s, ss;
u32 fuse2, eu_disable[s_max], s_enable, ss_disable;
u32 fuse2, eu_disable[s_max], ss_disable;
fuse2 = I915_READ(GEN8_FUSE2);
s_enable = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT;
sseu->slice_mask = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT;
ss_disable = (fuse2 & GEN8_F2_SS_DIS_MASK) >> GEN8_F2_SS_DIS_SHIFT;
eu_disable[0] = I915_READ(GEN8_EU_DISABLE0) & GEN8_EU_DIS0_S0_MASK;
@ -209,21 +209,20 @@ static void broadwell_sseu_info_init(struct drm_i915_private *dev_priv)
((I915_READ(GEN8_EU_DISABLE2) & GEN8_EU_DIS2_S2_MASK) <<
(32 - GEN8_EU_DIS1_S2_SHIFT));
sseu->slice_total = hweight32(s_enable);
/*
* The subslice disable field is global, i.e. it applies
* to each of the enabled slices.
*/
sseu->subslice_per_slice = ss_max - hweight32(ss_disable);
sseu->subslice_total = sseu->slice_total * sseu->subslice_per_slice;
sseu->subslice_total = hweight8(sseu->slice_mask) *
sseu->subslice_per_slice;
/*
* Iterate through enabled slices and subslices to
* count the total enabled EU.
*/
for (s = 0; s < s_max; s++) {
if (!(s_enable & (0x1 << s)))
if (!(sseu->slice_mask & BIT(s)))
/* skip disabled slice */
continue;
@ -258,7 +257,7 @@ static void broadwell_sseu_info_init(struct drm_i915_private *dev_priv)
* BDW supports slice power gating on devices with more than
* one slice.
*/
sseu->has_slice_pg = (sseu->slice_total > 1);
sseu->has_slice_pg = hweight8(sseu->slice_mask) > 1;
sseu->has_subslice_pg = 0;
sseu->has_eu_pg = 0;
}
@ -375,7 +374,7 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1))
info->has_snoop = false;
DRM_DEBUG_DRIVER("slice total: %u\n", info->sseu.slice_total);
DRM_DEBUG_DRIVER("slice total: %u\n", hweight8(info->sseu.slice_mask));
DRM_DEBUG_DRIVER("subslice total: %u\n", info->sseu.subslice_total);
DRM_DEBUG_DRIVER("subslice per slice: %u\n",
info->sseu.subslice_per_slice);

2
drivers/gpu/drm/i915/intel_lrc.c
View File

@ -1898,7 +1898,7 @@ make_rpcs(struct drm_i915_private *dev_priv)
*/
if (INTEL_INFO(dev_priv)->sseu.has_slice_pg) {
rpcs |= GEN8_RPCS_S_CNT_ENABLE;
rpcs |= INTEL_INFO(dev_priv)->sseu.slice_total <<
rpcs |= hweight8(INTEL_INFO(dev_priv)->sseu.slice_mask) <<
GEN8_RPCS_S_CNT_SHIFT;
rpcs |= GEN8_RPCS_ENABLE;
}