From: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com
Xe_HP is more modular then its predecessors and as a consequence it has more types of replicated registers. As with l3bank regions on previous platforms, we may need to explicitly re-steer accesses to these new types of ranges at runtime if we can't find a single default steering value that satisfies the fusing of all types.
Bspec: 66534 Cc: Tvrtko Ursulin tvrtko.ursulin@linux.intel.com Signed-off-by: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Signed-off-by: Matt Roper matthew.d.roper@intel.com --- drivers/gpu/drm/i915/gt/intel_gt.c | 40 ++++++++- drivers/gpu/drm/i915/gt/intel_gt.h | 1 + drivers/gpu/drm/i915/gt/intel_gt_types.h | 7 ++ drivers/gpu/drm/i915/gt/intel_region_lmem.c | 1 + drivers/gpu/drm/i915/gt/intel_sseu.c | 18 +++++ drivers/gpu/drm/i915/gt/intel_sseu.h | 6 ++ drivers/gpu/drm/i915/gt/intel_workarounds.c | 89 +++++++++++++++++++-- drivers/gpu/drm/i915/i915_drv.h | 3 + drivers/gpu/drm/i915/i915_pci.c | 1 + drivers/gpu/drm/i915/i915_reg.h | 4 + drivers/gpu/drm/i915/intel_device_info.h | 1 + 11 files changed, 165 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index e714e21c0a4d..f59bcedbb80b 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -89,6 +89,13 @@ static const struct intel_mmio_range icl_l3bank_steering_table[] = { {}, };
+static u16 slicemask(struct intel_gt *gt, int count) +{ + u64 dss_mask = intel_sseu_get_subslices(>->info.sseu, 0); + + return intel_slicemask_from_dssmask(dss_mask, count); +} + int intel_gt_init_mmio(struct intel_gt *gt) { intel_gt_init_clock_frequency(gt); @@ -96,11 +103,24 @@ int intel_gt_init_mmio(struct intel_gt *gt) intel_uc_init_mmio(>->uc); intel_sseu_info_init(gt);
- if (GRAPHICS_VER(gt->i915) >= 11) { + /* + * An mslice is unavailable only if both the meml3 for the slice is + * disabled *and* all of the DSS in the slice (quadrant) are disabled. + */ + if (HAS_MSLICES(gt->i915)) + gt->info.mslice_mask = + slicemask(gt, GEN_DSS_PER_MSLICE) | + (intel_uncore_read(gt->uncore, GEN10_MIRROR_FUSE3) & + GEN12_MEML3_EN_MASK); + + if (GRAPHICS_VER(gt->i915) >= 11 && + GRAPHICS_VER_FULL(gt->i915) < IP_VER(12, 50)) { gt->steering_table[L3BANK] = icl_l3bank_steering_table; gt->info.l3bank_mask = ~intel_uncore_read(gt->uncore, GEN10_MIRROR_FUSE3) & GEN10_L3BANK_MASK; + } else if (HAS_MSLICES(gt->i915)) { + MISSING_CASE(INTEL_INFO(gt->i915)->platform); }
return intel_engines_init_mmio(gt); @@ -766,6 +786,24 @@ static void intel_gt_get_valid_steering(struct intel_gt *gt, *sliceid = 0; /* unused */ *subsliceid = __ffs(gt->info.l3bank_mask); break; + case MSLICE: + GEM_DEBUG_WARN_ON(!gt->info.mslice_mask); /* should be impossible! */ + + *sliceid = __ffs(gt->info.mslice_mask); + *subsliceid = 0; /* unused */ + break; + case LNCF: + GEM_DEBUG_WARN_ON(!gt->info.mslice_mask); /* should be impossible! */ + + /* + * 0xFDC[29:28] selects the mslice to steer to and 0xFDC[27] + * selects which LNCF within the mslice to steer to. An LNCF + * is always present if its mslice is present, so we can safely + * just steer to LNCF 0 in all cases. + */ + *sliceid = __ffs(gt->info.mslice_mask) << 1; + *subsliceid = 0; /* unused */ + break; default: MISSING_CASE(type); *sliceid = 0; diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h b/drivers/gpu/drm/i915/gt/intel_gt.h index e7aabe0cc5bf..f9bcde31f697 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.h +++ b/drivers/gpu/drm/i915/gt/intel_gt.h @@ -82,6 +82,7 @@ static inline bool intel_gt_needs_read_steering(struct intel_gt *gt, }
u32 intel_gt_read_register_fw(struct intel_gt *gt, i915_reg_t reg); +u32 intel_gt_read_register(struct intel_gt *gt, i915_reg_t reg);
void intel_gt_info_print(const struct intel_gt_info *info, struct drm_printer *p); diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h index d93d578a4105..b06d8eaf12ea 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_types.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h @@ -47,9 +47,14 @@ struct intel_mmio_range { * of multicast registers. If another type of steering does not have any * overlap in valid steering targets with 'subslice' style registers, we will * need to explicitly re-steer reads of registers of the other type. + * + * Only the replication types that may need additional non-default steering + * are listed here. */ enum intel_steering_type { L3BANK, + MSLICE, + LNCF,
NUM_STEERING_TYPES }; @@ -183,6 +188,8 @@ struct intel_gt {
/* Slice/subslice/EU info */ struct sseu_dev_info sseu; + + unsigned long mslice_mask; } info; };
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 1f43aba2e9e2..196e7569a41a 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -10,6 +10,7 @@ #include "gem/i915_gem_lmem.h" #include "gem/i915_gem_region.h" #include "gem/i915_gem_ttm.h" +#include "gt/intel_gt.h"
static int init_fake_lmem_bar(struct intel_memory_region *mem) { diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.c b/drivers/gpu/drm/i915/gt/intel_sseu.c index 367fd44b81c8..bbed8e8625e1 100644 --- a/drivers/gpu/drm/i915/gt/intel_sseu.c +++ b/drivers/gpu/drm/i915/gt/intel_sseu.c @@ -759,3 +759,21 @@ void intel_sseu_print_topology(const struct sseu_dev_info *sseu, } } } + +u16 intel_slicemask_from_dssmask(u64 dss_mask, int dss_per_slice) +{ + u16 slice_mask = 0; + int i; + + WARN_ON(sizeof(dss_mask) * 8 / dss_per_slice > 8 * sizeof(slice_mask)); + + for (i = 0; dss_mask; i++) { + if (dss_mask & GENMASK(dss_per_slice - 1, 0)) + slice_mask |= BIT(i); + + dss_mask >>= dss_per_slice; + } + + return slice_mask; +} + diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.h b/drivers/gpu/drm/i915/gt/intel_sseu.h index 4cd1a8a7298a..1073471d1980 100644 --- a/drivers/gpu/drm/i915/gt/intel_sseu.h +++ b/drivers/gpu/drm/i915/gt/intel_sseu.h @@ -22,6 +22,10 @@ struct drm_printer; #define GEN_MAX_EUS (16) /* TGL upper bound */ #define GEN_MAX_EU_STRIDE GEN_SSEU_STRIDE(GEN_MAX_EUS)
+#define GEN_DSS_PER_GSLICE 4 +#define GEN_DSS_PER_CSLICE 8 +#define GEN_DSS_PER_MSLICE 8 + struct sseu_dev_info { u8 slice_mask; u8 subslice_mask[GEN_MAX_SLICES * GEN_MAX_SUBSLICE_STRIDE]; @@ -104,4 +108,6 @@ void intel_sseu_dump(const struct sseu_dev_info *sseu, struct drm_printer *p); void intel_sseu_print_topology(const struct sseu_dev_info *sseu, struct drm_printer *p);
+u16 intel_slicemask_from_dssmask(u64 dss_mask, int dss_per_slice); + #endif /* __INTEL_SSEU_H__ */ diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index 20c6ca28e407..060d84897635 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -944,12 +944,24 @@ cfl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); }
+static void __add_mcr_wa(struct drm_i915_private *i915, struct i915_wa_list *wal, + unsigned slice, unsigned subslice) +{ + u32 mcr, mcr_mask; + + mcr = GEN11_MCR_SLICE(slice) | GEN11_MCR_SUBSLICE(subslice); + mcr_mask = GEN11_MCR_SLICE_MASK | GEN11_MCR_SUBSLICE_MASK; + + drm_dbg(&i915->drm, "MCR slice/subslice = %x\n", mcr); + + wa_write_clr_set(wal, GEN8_MCR_SELECTOR, mcr_mask, mcr); +} + static void icl_wa_init_mcr(struct drm_i915_private *i915, struct i915_wa_list *wal) { const struct sseu_dev_info *sseu = &i915->gt.info.sseu; unsigned int slice, subslice; - u32 mcr, mcr_mask;
GEM_BUG_ON(GRAPHICS_VER(i915) < 11); GEM_BUG_ON(hweight8(sseu->slice_mask) > 1); @@ -974,12 +986,79 @@ icl_wa_init_mcr(struct drm_i915_private *i915, struct i915_wa_list *wal) if (i915->gt.info.l3bank_mask & BIT(subslice)) i915->gt.steering_table[L3BANK] = NULL;
- mcr = GEN11_MCR_SLICE(slice) | GEN11_MCR_SUBSLICE(subslice); - mcr_mask = GEN11_MCR_SLICE_MASK | GEN11_MCR_SUBSLICE_MASK; + __add_mcr_wa(i915, wal, slice, subslice); +}
- drm_dbg(&i915->drm, "MCR slice/subslice = %x\n", mcr); +__maybe_unused +static void +xehp_init_mcr(struct intel_gt *gt, struct i915_wa_list *wal) +{ + struct drm_i915_private *i915 = gt->i915; + const struct sseu_dev_info *sseu = >->info.sseu; + unsigned long slice, subslice = 0, slice_mask = 0; + u64 dss_mask = 0; + u32 lncf_mask = 0; + int i;
- wa_write_clr_set(wal, GEN8_MCR_SELECTOR, mcr_mask, mcr); + /* + * On Xe_HP the steering increases in complexity. There are now several + * more units that require steering and we're not guaranteed to be able + * to find a common setting for all of them. These are: + * - GSLICE (fusable) + * - DSS (sub-unit within gslice; fusable) + * - L3 Bank (fusable) + * - MSLICE (fusable) + * - LNCF (sub-unit within mslice; always present if mslice is present) + * - SQIDI (always on) + * + * We'll do our default/implicit steering based on GSLICE (in the + * sliceid field) and DSS (in the subsliceid field). If we can + * find overlap between the valid MSLICE and/or LNCF values with + * a suitable GSLICE, then we can just re-use the default value and + * skip and explicit steering at runtime. + * + * We only need to look for overlap between GSLICE/MSLICE/LNCF to find + * a valid sliceid value. DSS steering is the only type of steering + * that utilizes the 'subsliceid' bits. + * + * Also note that, even though the steering domain is called "GSlice" + * and it is encoded in the register using the gslice format, the spec + * says that the combined (geometry | compute) fuse should be used to + * select the steering. + */ + + /* Find the potential gslice candidates */ + dss_mask = intel_sseu_get_subslices(sseu, 0); + slice_mask = intel_slicemask_from_dssmask(dss_mask, GEN_DSS_PER_GSLICE); + + /* + * Find the potential LNCF candidates. Either LNCF within a valid + * mslice is fine. + */ + for_each_set_bit(i, >->info.mslice_mask, GEN12_MAX_MSLICES) + lncf_mask |= (0x3 << (i * 2)); + + /* + * Are there any sliceid values that work for both GSLICE and LNCF + * steering? + */ + if (slice_mask & lncf_mask) { + slice_mask &= lncf_mask; + gt->steering_table[LNCF] = NULL; + } + + /* How about sliceid values that also work for MSLICE steering? */ + if (slice_mask & gt->info.mslice_mask) { + slice_mask &= gt->info.mslice_mask; + gt->steering_table[MSLICE] = NULL; + } + + slice = __ffs(slice_mask); + subslice = __ffs(dss_mask >> (slice * GEN_DSS_PER_GSLICE)); + WARN_ON(subslice > GEN_DSS_PER_GSLICE); + WARN_ON(dss_mask >> (slice * GEN_DSS_PER_GSLICE) == 0); + + __add_mcr_wa(i915, wal, slice, subslice); }
static void diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 519cce702f4b..c02600850246 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1672,6 +1672,9 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915, #define HAS_RUNTIME_PM(dev_priv) (INTEL_INFO(dev_priv)->has_runtime_pm) #define HAS_64BIT_RELOC(dev_priv) (INTEL_INFO(dev_priv)->has_64bit_reloc)
+#define HAS_MSLICES(dev_priv) \ + (INTEL_INFO(dev_priv)->has_mslices) + #define HAS_IPC(dev_priv) (INTEL_INFO(dev_priv)->display.has_ipc)
#define HAS_REGION(i915, i) (INTEL_INFO(i915)->memory_regions & (i)) diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index 9684b647fd04..88b279452b87 100644 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -1012,6 +1012,7 @@ static const struct intel_device_info adl_p_info = { .has_llc = 1, \ .has_logical_ring_contexts = 1, \ .has_logical_ring_elsq = 1, \ + .has_mslices = 1, \ .has_rc6 = 1, \ .has_reset_engine = 1, \ .has_rps = 1, \ diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index c361a8f30531..43fdf63a2240 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2695,6 +2695,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg) #define GEN11_MCR_SLICE_MASK GEN11_MCR_SLICE(0xf) #define GEN11_MCR_SUBSLICE(subslice) (((subslice) & 0x7) << 24) #define GEN11_MCR_SUBSLICE_MASK GEN11_MCR_SUBSLICE(0x7) +#define GEN11_MCR_MULTICAST REG_BIT(31) #define RING_IPEIR(base) _MMIO((base) + 0x64) #define RING_IPEHR(base) _MMIO((base) + 0x68) #define RING_EIR(base) _MMIO((base) + 0xb0) @@ -3113,6 +3114,9 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg) #define GEN10_MIRROR_FUSE3 _MMIO(0x9118) #define GEN10_L3BANK_PAIR_COUNT 4 #define GEN10_L3BANK_MASK 0x0F +/* on Xe_HP the same fuses indicates mslices instead of L3 banks */ +#define GEN12_MAX_MSLICES 4 +#define GEN12_MEML3_EN_MASK 0x0F
#define GEN8_EU_DISABLE0 _MMIO(0x9134) #define GEN8_EU_DIS0_S0_MASK 0xffffff diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h index b00249906c28..f824de632cfe 100644 --- a/drivers/gpu/drm/i915/intel_device_info.h +++ b/drivers/gpu/drm/i915/intel_device_info.h @@ -127,6 +127,7 @@ enum intel_ppgtt_type { func(has_llc); \ func(has_logical_ring_contexts); \ func(has_logical_ring_elsq); \ + func(has_mslices); \ func(has_pooled_eu); \ func(has_rc6); \ func(has_rc6p); \