drm/i915/gt: remove explicit CNL handling from intel_sseu.c

CNL is the only platform with GRAPHICS_VER == 10. With its removal we
don't need to handle that version anymore.

Also we can now reduce the max number of slices: the call to
intel_sseu_set_info() with the highest number of slices comes from SKL
and BDW with 3 slices. Recent platforms actually increase the
number of subslices so the number of slices remain 1.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210728220326.1578242-3-lucas.demarchi@intel.com

diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.c b/drivers/gpu/drm/i915/gt/intel_sseu.c
index 367fd44..9542c3f 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_sseu.c
+++ b/drivers/gpu/drm/i915/gt/intel_sseu.c
@@ -188,83 +188,6 @@ static void gen11_sseu_info_init(struct intel_gt *gt)
        sseu->has_eu_pg = 1;
 }
 
-static void gen10_sseu_info_init(struct intel_gt *gt)
-{
-       struct intel_uncore *uncore = gt->uncore;
-       struct sseu_dev_info *sseu = &gt->info.sseu;
-       const u32 fuse2 = intel_uncore_read(uncore, GEN8_FUSE2);
-       const int eu_mask = 0xff;
-       u32 subslice_mask, eu_en;
-       int s, ss;
-
-       intel_sseu_set_info(sseu, 6, 4, 8);
-
-       sseu->slice_mask = (fuse2 & GEN10_F2_S_ENA_MASK) >>
-               GEN10_F2_S_ENA_SHIFT;
-
-       /* Slice0 */
-       eu_en = ~intel_uncore_read(uncore, GEN8_EU_DISABLE0);
-       for (ss = 0; ss < sseu->max_subslices; ss++)
-               sseu_set_eus(sseu, 0, ss, (eu_en >> (8 * ss)) & eu_mask);
-       /* Slice1 */
-       sseu_set_eus(sseu, 1, 0, (eu_en >> 24) & eu_mask);
-       eu_en = ~intel_uncore_read(uncore, GEN8_EU_DISABLE1);
-       sseu_set_eus(sseu, 1, 1, eu_en & eu_mask);
-       /* Slice2 */
-       sseu_set_eus(sseu, 2, 0, (eu_en >> 8) & eu_mask);
-       sseu_set_eus(sseu, 2, 1, (eu_en >> 16) & eu_mask);
-       /* Slice3 */
-       sseu_set_eus(sseu, 3, 0, (eu_en >> 24) & eu_mask);
-       eu_en = ~intel_uncore_read(uncore, GEN8_EU_DISABLE2);
-       sseu_set_eus(sseu, 3, 1, eu_en & eu_mask);
-       /* Slice4 */
-       sseu_set_eus(sseu, 4, 0, (eu_en >> 8) & eu_mask);
-       sseu_set_eus(sseu, 4, 1, (eu_en >> 16) & eu_mask);
-       /* Slice5 */
-       sseu_set_eus(sseu, 5, 0, (eu_en >> 24) & eu_mask);
-       eu_en = ~intel_uncore_read(uncore, GEN10_EU_DISABLE3);
-       sseu_set_eus(sseu, 5, 1, eu_en & eu_mask);
-
-       subslice_mask = (1 << 4) - 1;
-       subslice_mask &= ~((fuse2 & GEN10_F2_SS_DIS_MASK) >>
-                          GEN10_F2_SS_DIS_SHIFT);
-
-       for (s = 0; s < sseu->max_slices; s++) {
-               u32 subslice_mask_with_eus = subslice_mask;
-
-               for (ss = 0; ss < sseu->max_subslices; ss++) {
-                       if (sseu_get_eus(sseu, s, ss) == 0)
-                               subslice_mask_with_eus &= ~BIT(ss);
-               }
-
-               /*
-                * Slice0 can have up to 3 subslices, but there are only 2 in
-                * slice1/2.
-                */
-               intel_sseu_set_subslices(sseu, s, s == 0 ?
-                                        subslice_mask_with_eus :
-                                        subslice_mask_with_eus & 0x3);
-       }
-
-       sseu->eu_total = compute_eu_total(sseu);
-
-       /*
-        * CNL is expected to always have a uniform distribution
-        * of EU across subslices with the exception that any one
-        * EU in any one subslice may be fused off for die
-        * recovery.
-        */
-       sseu->eu_per_subslice =
-               intel_sseu_subslice_total(sseu) ?
-               DIV_ROUND_UP(sseu->eu_total, intel_sseu_subslice_total(sseu)) :
-               0;
-
-       /* No restrictions on Power Gating */
-       sseu->has_slice_pg = 1;
-       sseu->has_subslice_pg = 1;
-       sseu->has_eu_pg = 1;
-}
-
 static void cherryview_sseu_info_init(struct intel_gt *gt)
 {
        struct sseu_dev_info *sseu = &gt->info.sseu;
@@ -592,8 +515,6 @@ void intel_sseu_info_init(struct intel_gt *gt)
                bdw_sseu_info_init(gt);
        else if (GRAPHICS_VER(i915) == 9)
                gen9_sseu_info_init(gt);
-       else if (GRAPHICS_VER(i915) == 10)
-               gen10_sseu_info_init(gt);
        else if (GRAPHICS_VER(i915) == 11)
                gen11_sseu_info_init(gt);
        else if (GRAPHICS_VER(i915) >= 12)

diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.h b/drivers/gpu/drm/i915/gt/intel_sseu.h
index 4cd1a8a..8d85ec0 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_sseu.h
+++ b/drivers/gpu/drm/i915/gt/intel_sseu.h
@@ -15,7 +15,7 @@ struct drm_i915_private;
 struct intel_gt;
 struct drm_printer;
 
-#define GEN_MAX_SLICES         (6) /* CNL upper bound */
+#define GEN_MAX_SLICES         (3) /* SKL upper bound */
 #define GEN_MAX_SUBSLICES      (8) /* ICL upper bound */
 #define GEN_SSEU_STRIDE(max_entries) DIV_ROUND_UP(max_entries, BITS_PER_BYTE)
 #define GEN_MAX_SUBSLICE_STRIDE GEN_SSEU_STRIDE(GEN_MAX_SUBSLICES)