diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_mocs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_mocs.c | 176 |
1 files changed, 152 insertions, 24 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c index 582c4423b95d..15f9ada28a7a 100644 --- a/drivers/gpu/drm/i915/gt/intel_mocs.c +++ b/drivers/gpu/drm/i915/gt/intel_mocs.c @@ -22,6 +22,8 @@ struct drm_i915_mocs_table { unsigned int size; unsigned int n_entries; const struct drm_i915_mocs_entry *table; + u8 uc_index; + u8 unused_entries_index; }; /* Defines for the tables (XXX_MOCS_0 - XXX_MOCS_63) */ @@ -40,6 +42,8 @@ struct drm_i915_mocs_table { #define L3_ESC(value) ((value) << 0) #define L3_SCC(value) ((value) << 1) #define _L3_CACHEABILITY(value) ((value) << 4) +#define L3_GLBGO(value) ((value) << 6) +#define L3_LKUP(value) ((value) << 7) /* Helper defines */ #define GEN9_NUM_MOCS_ENTRIES 64 /* 63-64 are reserved, but configured. */ @@ -88,18 +92,25 @@ struct drm_i915_mocs_table { * * Entries not part of the following tables are undefined as far as * userspace is concerned and shouldn't be relied upon. For Gen < 12 - * they will be initialized to PTE. Gen >= 12 onwards don't have a setting for - * PTE and will be initialized to an invalid value. + * they will be initialized to PTE. Gen >= 12 don't have a setting for + * PTE and those platforms except TGL/RKL will be initialized L3 WB to + * catch accidental use of reserved and unused mocs indexes. * * The last few entries are reserved by the hardware. For ICL+ they * should be initialized according to bspec and never used, for older * platforms they should never be written to. * - * NOTE: These tables are part of bspec and defined as part of hardware + * NOTE1: These tables are part of bspec and defined as part of hardware * interface for ICL+. For older platforms, they are part of kernel * ABI. It is expected that, for specific hardware platform, existing * entries will remain constant and the table will only be updated by * adding new entries, filling unused positions. + * + * NOTE2: For GEN >= 12 except TGL and RKL, reserved and unspecified MOCS + * indices have been set to L3 WB. These reserved entries should never + * be used, they may be changed to low performant variants with better + * coherency in the future if more entries are needed. + * For TGL/RKL, all the unspecified MOCS indexes are mapped to L3 UC. */ #define GEN9_MOCS_ENTRIES \ MOCS_ENTRY(I915_MOCS_UNCACHED, \ @@ -282,17 +293,9 @@ static const struct drm_i915_mocs_entry icl_mocs_table[] = { }; static const struct drm_i915_mocs_entry dg1_mocs_table[] = { - /* Error */ - MOCS_ENTRY(0, 0, L3_0_DIRECT), /* UC */ MOCS_ENTRY(1, 0, L3_1_UC), - - /* Reserved */ - MOCS_ENTRY(2, 0, L3_0_DIRECT), - MOCS_ENTRY(3, 0, L3_0_DIRECT), - MOCS_ENTRY(4, 0, L3_0_DIRECT), - /* WB - L3 */ MOCS_ENTRY(5, 0, L3_3_WB), /* WB - L3 50% */ @@ -314,6 +317,83 @@ static const struct drm_i915_mocs_entry dg1_mocs_table[] = { MOCS_ENTRY(63, 0, L3_1_UC), }; +static const struct drm_i915_mocs_entry gen12_mocs_table[] = { + GEN11_MOCS_ENTRIES, + /* Implicitly enable L1 - HDC:L1 + L3 + LLC */ + MOCS_ENTRY(48, + LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), + L3_3_WB), + /* Implicitly enable L1 - HDC:L1 + L3 */ + MOCS_ENTRY(49, + LE_1_UC | LE_TC_1_LLC, + L3_3_WB), + /* Implicitly enable L1 - HDC:L1 + LLC */ + MOCS_ENTRY(50, + LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), + L3_1_UC), + /* Implicitly enable L1 - HDC:L1 */ + MOCS_ENTRY(51, + LE_1_UC | LE_TC_1_LLC, + L3_1_UC), + /* HW Special Case (CCS) */ + MOCS_ENTRY(60, + LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), + L3_1_UC), + /* HW Special Case (Displayable) */ + MOCS_ENTRY(61, + LE_1_UC | LE_TC_1_LLC, + L3_3_WB), +}; + +static const struct drm_i915_mocs_entry xehpsdv_mocs_table[] = { + /* wa_1608975824 */ + MOCS_ENTRY(0, 0, L3_3_WB | L3_LKUP(1)), + + /* UC - Coherent; GO:L3 */ + MOCS_ENTRY(1, 0, L3_1_UC | L3_LKUP(1)), + /* UC - Coherent; GO:Memory */ + MOCS_ENTRY(2, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)), + /* UC - Non-Coherent; GO:Memory */ + MOCS_ENTRY(3, 0, L3_1_UC | L3_GLBGO(1)), + /* UC - Non-Coherent; GO:L3 */ + MOCS_ENTRY(4, 0, L3_1_UC), + + /* WB */ + MOCS_ENTRY(5, 0, L3_3_WB | L3_LKUP(1)), + + /* HW Reserved - SW program but never use. */ + MOCS_ENTRY(48, 0, L3_3_WB | L3_LKUP(1)), + MOCS_ENTRY(49, 0, L3_1_UC | L3_LKUP(1)), + MOCS_ENTRY(60, 0, L3_1_UC), + MOCS_ENTRY(61, 0, L3_1_UC), + MOCS_ENTRY(62, 0, L3_1_UC), + MOCS_ENTRY(63, 0, L3_1_UC), +}; + +static const struct drm_i915_mocs_entry dg2_mocs_table[] = { + /* UC - Coherent; GO:L3 */ + MOCS_ENTRY(0, 0, L3_1_UC | L3_LKUP(1)), + /* UC - Coherent; GO:Memory */ + MOCS_ENTRY(1, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)), + /* UC - Non-Coherent; GO:Memory */ + MOCS_ENTRY(2, 0, L3_1_UC | L3_GLBGO(1)), + + /* WB - LC */ + MOCS_ENTRY(3, 0, L3_3_WB | L3_LKUP(1)), +}; + +static const struct drm_i915_mocs_entry dg2_mocs_table_g10_ax[] = { + /* Wa_14011441408: Set Go to Memory for MOCS#0 */ + MOCS_ENTRY(0, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)), + /* UC - Coherent; GO:Memory */ + MOCS_ENTRY(1, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)), + /* UC - Non-Coherent; GO:Memory */ + MOCS_ENTRY(2, 0, L3_1_UC | L3_GLBGO(1)), + + /* WB - LC */ + MOCS_ENTRY(3, 0, L3_3_WB | L3_LKUP(1)), +}; + enum { HAS_GLOBAL_MOCS = BIT(0), HAS_ENGINE_MOCS = BIT(1), @@ -340,14 +420,45 @@ static unsigned int get_mocs_settings(const struct drm_i915_private *i915, { unsigned int flags; - if (IS_DG1(i915)) { + memset(table, 0, sizeof(struct drm_i915_mocs_table)); + + table->unused_entries_index = I915_MOCS_PTE; + if (IS_DG2(i915)) { + if (IS_DG2_GT_STEP(i915, G10, STEP_A0, STEP_B0)) { + table->size = ARRAY_SIZE(dg2_mocs_table_g10_ax); + table->table = dg2_mocs_table_g10_ax; + } else { + table->size = ARRAY_SIZE(dg2_mocs_table); + table->table = dg2_mocs_table; + } + table->uc_index = 1; + table->n_entries = GEN9_NUM_MOCS_ENTRIES; + table->unused_entries_index = 3; + } else if (IS_XEHPSDV(i915)) { + table->size = ARRAY_SIZE(xehpsdv_mocs_table); + table->table = xehpsdv_mocs_table; + table->uc_index = 2; + table->n_entries = GEN9_NUM_MOCS_ENTRIES; + table->unused_entries_index = 5; + } else if (IS_DG1(i915)) { table->size = ARRAY_SIZE(dg1_mocs_table); table->table = dg1_mocs_table; + table->uc_index = 1; table->n_entries = GEN9_NUM_MOCS_ENTRIES; - } else if (GRAPHICS_VER(i915) >= 12) { + table->uc_index = 1; + table->unused_entries_index = 5; + } else if (IS_TIGERLAKE(i915) || IS_ROCKETLAKE(i915)) { + /* For TGL/RKL, Can't be changed now for ABI reasons */ table->size = ARRAY_SIZE(tgl_mocs_table); table->table = tgl_mocs_table; table->n_entries = GEN9_NUM_MOCS_ENTRIES; + table->uc_index = 3; + } else if (GRAPHICS_VER(i915) >= 12) { + table->size = ARRAY_SIZE(gen12_mocs_table); + table->table = gen12_mocs_table; + table->n_entries = GEN9_NUM_MOCS_ENTRIES; + table->uc_index = 3; + table->unused_entries_index = 2; } else if (GRAPHICS_VER(i915) == 11) { table->size = ARRAY_SIZE(icl_mocs_table); table->table = icl_mocs_table; @@ -393,16 +504,16 @@ static unsigned int get_mocs_settings(const struct drm_i915_private *i915, } /* - * Get control_value from MOCS entry taking into account when it's not used: - * I915_MOCS_PTE's value is returned in this case. + * Get control_value from MOCS entry taking into account when it's not used + * then if unused_entries_index is non-zero then its value will be returned + * otherwise I915_MOCS_PTE's value is returned in this case. */ static u32 get_entry_control(const struct drm_i915_mocs_table *table, unsigned int index) { if (index < table->size && table->table[index].used) return table->table[index].control_value; - - return table->table[I915_MOCS_PTE].control_value; + return table->table[table->unused_entries_index].control_value; } #define for_each_mocs(mocs, t, i) \ @@ -417,6 +528,8 @@ static void __init_mocs_table(struct intel_uncore *uncore, unsigned int i; u32 mocs; + drm_WARN_ONCE(&uncore->i915->drm, !table->unused_entries_index, + "Unused entries index should have been defined\n"); for_each_mocs(mocs, table, i) intel_uncore_write_fw(uncore, _MMIO(addr + i * 4), mocs); } @@ -443,16 +556,16 @@ static void init_mocs_table(struct intel_engine_cs *engine, } /* - * Get l3cc_value from MOCS entry taking into account when it's not used: - * I915_MOCS_PTE's value is returned in this case. + * Get l3cc_value from MOCS entry taking into account when it's not used + * then if unused_entries_index is not zero then its value will be returned + * otherwise I915_MOCS_PTE's value is returned in this case. */ static u16 get_entry_l3cc(const struct drm_i915_mocs_table *table, unsigned int index) { if (index < table->size && table->table[index].used) return table->table[index].l3cc_value; - - return table->table[I915_MOCS_PTE].l3cc_value; + return table->table[table->unused_entries_index].l3cc_value; } static u32 l3cc_combine(u16 low, u16 high) @@ -468,10 +581,9 @@ static u32 l3cc_combine(u16 low, u16 high) 0; \ i++) -static void init_l3cc_table(struct intel_engine_cs *engine, +static void init_l3cc_table(struct intel_uncore *uncore, const struct drm_i915_mocs_table *table) { - struct intel_uncore *uncore = engine->uncore; unsigned int i; u32 l3cc; @@ -496,7 +608,7 @@ void intel_mocs_init_engine(struct intel_engine_cs *engine) init_mocs_table(engine, &table); if (flags & HAS_RENDER_L3CC && engine->class == RENDER_CLASS) - init_l3cc_table(engine, &table); + init_l3cc_table(engine->uncore, &table); } static u32 global_mocs_offset(void) @@ -504,6 +616,14 @@ static u32 global_mocs_offset(void) return i915_mmio_reg_offset(GEN12_GLOBAL_MOCS(0)); } +void intel_set_mocs_index(struct intel_gt *gt) +{ + struct drm_i915_mocs_table table; + + get_mocs_settings(gt->i915, &table); + gt->mocs.uc_index = table.uc_index; +} + void intel_mocs_init(struct intel_gt *gt) { struct drm_i915_mocs_table table; @@ -515,6 +635,14 @@ void intel_mocs_init(struct intel_gt *gt) flags = get_mocs_settings(gt->i915, &table); if (flags & HAS_GLOBAL_MOCS) __init_mocs_table(gt->uncore, &table, global_mocs_offset()); + + /* + * Initialize the L3CC table as part of mocs initalization to make + * sure the LNCFCMOCSx registers are programmed for the subsequent + * memory transactions including guc transactions + */ + if (flags & HAS_RENDER_L3CC) + init_l3cc_table(gt->uncore, &table); } #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) |