diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 3a08684a7af33710536ecd87dcb5916643a67fb8..238cd6fa48af64636d634ab758ae2eeba71f8203 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -4358,6 +4358,35 @@ DEFINE_SIMPLE_ATTRIBUTE(i915_cache_sharing_fops, i915_cache_sharing_get, i915_cache_sharing_set, "%llu\n"); +static int i915_sseu_status(struct seq_file *m, void *unused) +{ + struct drm_info_node *node = (struct drm_info_node *) m->private; + struct drm_device *dev = node->minor->dev; + + if (INTEL_INFO(dev)->gen < 9) + return -ENODEV; + + seq_puts(m, "SSEU Device Info\n"); + seq_printf(m, " Available Slice Total: %u\n", + INTEL_INFO(dev)->slice_total); + seq_printf(m, " Available Subslice Total: %u\n", + INTEL_INFO(dev)->subslice_total); + seq_printf(m, " Available Subslice Per Slice: %u\n", + INTEL_INFO(dev)->subslice_per_slice); + seq_printf(m, " Available EU Total: %u\n", + INTEL_INFO(dev)->eu_total); + seq_printf(m, " Available EU Per Subslice: %u\n", + INTEL_INFO(dev)->eu_per_subslice); + seq_printf(m, " Has Slice Power Gating: %s\n", + yesno(INTEL_INFO(dev)->has_slice_pg)); + seq_printf(m, " Has Subslice Power Gating: %s\n", + yesno(INTEL_INFO(dev)->has_subslice_pg)); + seq_printf(m, " Has EU Power Gating: %s\n", + yesno(INTEL_INFO(dev)->has_eu_pg)); + + return 0; +} + static int i915_forcewake_open(struct inode *inode, struct file *file) { struct drm_device *dev = inode->i_private; @@ -4471,6 +4500,7 @@ static const struct drm_info_list i915_debugfs_list[] = { {"i915_dp_mst_info", i915_dp_mst_info, 0}, {"i915_wa_registers", i915_wa_registers, 0}, {"i915_ddb_info", i915_ddb_info, 0}, + {"i915_sseu_status", i915_sseu_status, 0}, }; #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 5804aa5f9df074c007782fa89963dba47b3f5cc4..9a365b40b50eeccf189a2a2875375cec73398ef4 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -606,6 +606,7 @@ static void intel_device_info_runtime_init(struct drm_device *dev) } } + /* Initialize slice/subslice/EU info */ if (IS_CHERRYVIEW(dev)) { u32 fuse, mask_eu; @@ -615,7 +616,79 @@ static void intel_device_info_runtime_init(struct drm_device *dev) CHV_FGT_EU_DIS_SS1_R0_MASK | CHV_FGT_EU_DIS_SS1_R1_MASK); info->eu_total = 16 - hweight32(mask_eu); + } else if (IS_SKYLAKE(dev)) { + const int s_max = 3, ss_max = 4, eu_max = 8; + int s, ss; + u32 fuse2, eu_disable[s_max], s_enable, ss_disable; + + fuse2 = I915_READ(GEN8_FUSE2); + s_enable = (fuse2 & GEN8_F2_S_ENA_MASK) >> + GEN8_F2_S_ENA_SHIFT; + ss_disable = (fuse2 & GEN9_F2_SS_DIS_MASK) >> + GEN9_F2_SS_DIS_SHIFT; + + eu_disable[0] = I915_READ(GEN8_EU_DISABLE0); + eu_disable[1] = I915_READ(GEN8_EU_DISABLE1); + eu_disable[2] = I915_READ(GEN8_EU_DISABLE2); + + info->slice_total = hweight32(s_enable); + /* + * The subslice disable field is global, i.e. it applies + * to each of the enabled slices. + */ + info->subslice_per_slice = ss_max - hweight32(ss_disable); + info->subslice_total = info->slice_total * + info->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))) + /* skip disabled slice */ + continue; + + for (ss = 0; ss < ss_max; ss++) { + if (ss_disable & (0x1 << ss)) + /* skip disabled subslice */ + continue; + + info->eu_total += eu_max - + hweight8(eu_disable[s] >> + (ss * eu_max)); + } + } + + /* + * SKL 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. + */ + info->eu_per_subslice = info->subslice_total ? + DIV_ROUND_UP(info->eu_total, + info->subslice_total) : 0; + /* + * SKL supports slice power gating on devices with more than + * one slice, and supports EU power gating on devices with + * more than one EU pair per subslice. + */ + info->has_slice_pg = (info->slice_total > 1) ? 1 : 0; + info->has_subslice_pg = 0; + info->has_eu_pg = (info->eu_per_subslice > 2) ? 1 : 0; } + DRM_DEBUG_DRIVER("slice total: %u\n", info->slice_total); + DRM_DEBUG_DRIVER("subslice total: %u\n", info->subslice_total); + DRM_DEBUG_DRIVER("subslice per slice: %u\n", info->subslice_per_slice); + DRM_DEBUG_DRIVER("EU total: %u\n", info->eu_total); + DRM_DEBUG_DRIVER("EU per subslice: %u\n", info->eu_per_subslice); + DRM_DEBUG_DRIVER("has slice power gating: %s\n", + info->has_slice_pg ? "y" : "n"); + DRM_DEBUG_DRIVER("has subslice power gating: %s\n", + info->has_subslice_pg ? "y" : "n"); + DRM_DEBUG_DRIVER("has EU power gating: %s\n", + info->has_eu_pg ? "y" : "n"); } /** diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 3f210aa7652e67bed015c2edd5dbf45cc9978187..61d41abde2e94730ccac0890540f9034b78e84d5 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -693,7 +693,16 @@ struct intel_device_info { int trans_offsets[I915_MAX_TRANSCODERS]; int palette_offsets[I915_MAX_PIPES]; int cursor_offsets[I915_MAX_PIPES]; - unsigned int eu_total; + + /* Slice/subslice/EU info */ + u8 slice_total; + u8 subslice_total; + u8 subslice_per_slice; + u8 eu_total; + u8 eu_per_subslice; + u8 has_slice_pg:1; + u8 has_subslice_pg:1; + u8 has_eu_pg:1; }; #undef DEFINE_FLAG diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index f67e290b5475908278a5d6f406128fe84ae3f5d3..f9d4367ee8d4f536f4c9e86fc1258915e75a89f9 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1516,6 +1516,17 @@ enum skl_disp_power_wells { #define CHV_FGT_EU_DIS_SS1_R1_SHIFT 28 #define CHV_FGT_EU_DIS_SS1_R1_MASK (0xf << CHV_FGT_EU_DIS_SS1_R1_SHIFT) +#define GEN8_FUSE2 0x9120 +#define GEN8_F2_S_ENA_SHIFT 25 +#define GEN8_F2_S_ENA_MASK (0x7 << GEN8_F2_S_ENA_SHIFT) + +#define GEN9_F2_SS_DIS_SHIFT 20 +#define GEN9_F2_SS_DIS_MASK (0xf << GEN9_F2_SS_DIS_SHIFT) + +#define GEN8_EU_DISABLE0 0x9134 +#define GEN8_EU_DISABLE1 0x9138 +#define GEN8_EU_DISABLE2 0x913c + #define GEN6_BSD_SLEEP_PSMI_CONTROL 0x12050 #define GEN6_BSD_SLEEP_MSG_DISABLE (1 << 0) #define GEN6_BSD_SLEEP_FLUSH_DISABLE (1 << 2)