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path: root/drivers/gpu/drm/i915/intel_mocs.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_mocs.c')
-rw-r--r--drivers/gpu/drm/i915/intel_mocs.c408
1 files changed, 261 insertions, 147 deletions
diff --git a/drivers/gpu/drm/i915/intel_mocs.c b/drivers/gpu/drm/i915/intel_mocs.c
index 77e9871a8c9a..331e7a678fb7 100644
--- a/drivers/gpu/drm/i915/intel_mocs.c
+++ b/drivers/gpu/drm/i915/intel_mocs.c
@@ -28,48 +28,60 @@
struct drm_i915_mocs_entry {
u32 control_value;
u16 l3cc_value;
+ u16 used;
};
struct drm_i915_mocs_table {
- u32 size;
+ unsigned int size;
+ unsigned int n_entries;
const struct drm_i915_mocs_entry *table;
};
/* Defines for the tables (XXX_MOCS_0 - XXX_MOCS_63) */
-#define LE_CACHEABILITY(value) ((value) << 0)
-#define LE_TGT_CACHE(value) ((value) << 2)
+#define _LE_CACHEABILITY(value) ((value) << 0)
+#define _LE_TGT_CACHE(value) ((value) << 2)
#define LE_LRUM(value) ((value) << 4)
#define LE_AOM(value) ((value) << 6)
#define LE_RSC(value) ((value) << 7)
#define LE_SCC(value) ((value) << 8)
#define LE_PFM(value) ((value) << 11)
#define LE_SCF(value) ((value) << 14)
+#define LE_COS(value) ((value) << 15)
+#define LE_SSE(value) ((value) << 17)
/* Defines for the tables (LNCFMOCS0 - LNCFMOCS31) - two entries per word */
#define L3_ESC(value) ((value) << 0)
#define L3_SCC(value) ((value) << 1)
-#define L3_CACHEABILITY(value) ((value) << 4)
+#define _L3_CACHEABILITY(value) ((value) << 4)
/* Helper defines */
#define GEN9_NUM_MOCS_ENTRIES 62 /* 62 out of 64 - 63 & 64 are reserved. */
+#define GEN11_NUM_MOCS_ENTRIES 64 /* 63-64 are reserved, but configured. */
/* (e)LLC caching options */
-#define LE_PAGETABLE 0
-#define LE_UC 1
-#define LE_WT 2
-#define LE_WB 3
-
-/* L3 caching options */
-#define L3_DIRECT 0
-#define L3_UC 1
-#define L3_RESERVED 2
-#define L3_WB 3
+#define LE_0_PAGETABLE _LE_CACHEABILITY(0)
+#define LE_1_UC _LE_CACHEABILITY(1)
+#define LE_2_WT _LE_CACHEABILITY(2)
+#define LE_3_WB _LE_CACHEABILITY(3)
/* Target cache */
-#define LE_TC_PAGETABLE 0
-#define LE_TC_LLC 1
-#define LE_TC_LLC_ELLC 2
-#define LE_TC_LLC_ELLC_ALT 3
+#define LE_TC_0_PAGETABLE _LE_TGT_CACHE(0)
+#define LE_TC_1_LLC _LE_TGT_CACHE(1)
+#define LE_TC_2_LLC_ELLC _LE_TGT_CACHE(2)
+#define LE_TC_3_LLC_ELLC_ALT _LE_TGT_CACHE(3)
+
+/* L3 caching options */
+#define L3_0_DIRECT _L3_CACHEABILITY(0)
+#define L3_1_UC _L3_CACHEABILITY(1)
+#define L3_2_RESERVED _L3_CACHEABILITY(2)
+#define L3_3_WB _L3_CACHEABILITY(3)
+
+#define MOCS_ENTRY(__idx, __control_value, __l3cc_value) \
+ [__idx] = { \
+ .control_value = __control_value, \
+ .l3cc_value = __l3cc_value, \
+ .used = 1, \
+ }
/*
* MOCS tables
@@ -80,85 +92,147 @@ struct drm_i915_mocs_table {
* LNCFCMOCS0 - LNCFCMOCS32 registers.
*
* These tables are intended to be kept reasonably consistent across
- * platforms. However some of the fields are not applicable to all of
- * them.
+ * HW platforms, and for ICL+, be identical across OSes. To achieve
+ * that, for Icelake and above, list of entries is published as part
+ * of bspec.
*
* Entries not part of the following tables are undefined as far as
* userspace is concerned and shouldn't be relied upon. For the time
- * being they will be implicitly initialized to the strictest caching
- * configuration (uncached) to guarantee forwards compatibility with
- * userspace programs written against more recent kernels providing
- * additional MOCS entries.
+ * being they will be initialized to PTE.
*
- * NOTE: These tables MUST start with being uncached and the length
- * MUST be less than 63 as the last two registers are reserved
- * by the hardware. These tables are part of the kernel ABI and
- * may only be updated incrementally by adding entries at the
- * end.
+ * The last two 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
+ * 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.
*/
+#define GEN9_MOCS_ENTRIES \
+ MOCS_ENTRY(I915_MOCS_UNCACHED, \
+ LE_1_UC | LE_TC_2_LLC_ELLC, \
+ L3_1_UC), \
+ MOCS_ENTRY(I915_MOCS_PTE, \
+ LE_0_PAGETABLE | LE_TC_2_LLC_ELLC | LE_LRUM(3), \
+ L3_3_WB)
+
static const struct drm_i915_mocs_entry skylake_mocs_table[] = {
- [I915_MOCS_UNCACHED] = {
- /* 0x00000009 */
- .control_value = LE_CACHEABILITY(LE_UC) |
- LE_TGT_CACHE(LE_TC_LLC_ELLC) |
- LE_LRUM(0) | LE_AOM(0) | LE_RSC(0) | LE_SCC(0) |
- LE_PFM(0) | LE_SCF(0),
-
- /* 0x0010 */
- .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_UC),
- },
- [I915_MOCS_PTE] = {
- /* 0x00000038 */
- .control_value = LE_CACHEABILITY(LE_PAGETABLE) |
- LE_TGT_CACHE(LE_TC_LLC_ELLC) |
- LE_LRUM(3) | LE_AOM(0) | LE_RSC(0) | LE_SCC(0) |
- LE_PFM(0) | LE_SCF(0),
- /* 0x0030 */
- .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_WB),
- },
- [I915_MOCS_CACHED] = {
- /* 0x0000003b */
- .control_value = LE_CACHEABILITY(LE_WB) |
- LE_TGT_CACHE(LE_TC_LLC_ELLC) |
- LE_LRUM(3) | LE_AOM(0) | LE_RSC(0) | LE_SCC(0) |
- LE_PFM(0) | LE_SCF(0),
- /* 0x0030 */
- .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_WB),
- },
+ GEN9_MOCS_ENTRIES,
+ MOCS_ENTRY(I915_MOCS_CACHED,
+ LE_3_WB | LE_TC_2_LLC_ELLC | LE_LRUM(3),
+ L3_3_WB)
};
/* NOTE: the LE_TGT_CACHE is not used on Broxton */
static const struct drm_i915_mocs_entry broxton_mocs_table[] = {
- [I915_MOCS_UNCACHED] = {
- /* 0x00000009 */
- .control_value = LE_CACHEABILITY(LE_UC) |
- LE_TGT_CACHE(LE_TC_LLC_ELLC) |
- LE_LRUM(0) | LE_AOM(0) | LE_RSC(0) | LE_SCC(0) |
- LE_PFM(0) | LE_SCF(0),
-
- /* 0x0010 */
- .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_UC),
- },
- [I915_MOCS_PTE] = {
- /* 0x00000038 */
- .control_value = LE_CACHEABILITY(LE_PAGETABLE) |
- LE_TGT_CACHE(LE_TC_LLC_ELLC) |
- LE_LRUM(3) | LE_AOM(0) | LE_RSC(0) | LE_SCC(0) |
- LE_PFM(0) | LE_SCF(0),
-
- /* 0x0030 */
- .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_WB),
- },
- [I915_MOCS_CACHED] = {
- /* 0x00000039 */
- .control_value = LE_CACHEABILITY(LE_UC) |
- LE_TGT_CACHE(LE_TC_LLC_ELLC) |
- LE_LRUM(3) | LE_AOM(0) | LE_RSC(0) | LE_SCC(0) |
- LE_PFM(0) | LE_SCF(0),
-
- /* 0x0030 */
- .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_WB),
- },
+ GEN9_MOCS_ENTRIES,
+ MOCS_ENTRY(I915_MOCS_CACHED,
+ LE_1_UC | LE_TC_2_LLC_ELLC | LE_LRUM(3),
+ L3_3_WB)
+};
+
+#define GEN11_MOCS_ENTRIES \
+ /* Base - Uncached (Deprecated) */ \
+ MOCS_ENTRY(I915_MOCS_UNCACHED, \
+ LE_1_UC | LE_TC_1_LLC, \
+ L3_1_UC), \
+ /* Base - L3 + LeCC:PAT (Deprecated) */ \
+ MOCS_ENTRY(I915_MOCS_PTE, \
+ LE_0_PAGETABLE | LE_TC_1_LLC, \
+ L3_3_WB), \
+ /* Base - L3 + LLC */ \
+ MOCS_ENTRY(2, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
+ L3_3_WB), \
+ /* Base - Uncached */ \
+ MOCS_ENTRY(3, \
+ LE_1_UC | LE_TC_1_LLC, \
+ L3_1_UC), \
+ /* Base - L3 */ \
+ MOCS_ENTRY(4, \
+ LE_1_UC | LE_TC_1_LLC, \
+ L3_3_WB), \
+ /* Base - LLC */ \
+ MOCS_ENTRY(5, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
+ L3_1_UC), \
+ /* Age 0 - LLC */ \
+ MOCS_ENTRY(6, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(1), \
+ L3_1_UC), \
+ /* Age 0 - L3 + LLC */ \
+ MOCS_ENTRY(7, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(1), \
+ L3_3_WB), \
+ /* Age: Don't Chg. - LLC */ \
+ MOCS_ENTRY(8, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(2), \
+ L3_1_UC), \
+ /* Age: Don't Chg. - L3 + LLC */ \
+ MOCS_ENTRY(9, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(2), \
+ L3_3_WB), \
+ /* No AOM - LLC */ \
+ MOCS_ENTRY(10, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_AOM(1), \
+ L3_1_UC), \
+ /* No AOM - L3 + LLC */ \
+ MOCS_ENTRY(11, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_AOM(1), \
+ L3_3_WB), \
+ /* No AOM; Age 0 - LLC */ \
+ MOCS_ENTRY(12, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(1) | LE_AOM(1), \
+ L3_1_UC), \
+ /* No AOM; Age 0 - L3 + LLC */ \
+ MOCS_ENTRY(13, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(1) | LE_AOM(1), \
+ L3_3_WB), \
+ /* No AOM; Age:DC - LLC */ \
+ MOCS_ENTRY(14, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(2) | LE_AOM(1), \
+ L3_1_UC), \
+ /* No AOM; Age:DC - L3 + LLC */ \
+ MOCS_ENTRY(15, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(2) | LE_AOM(1), \
+ L3_3_WB), \
+ /* Self-Snoop - L3 + LLC */ \
+ MOCS_ENTRY(18, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SSE(3), \
+ L3_3_WB), \
+ /* Skip Caching - L3 + LLC(12.5%) */ \
+ MOCS_ENTRY(19, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(7), \
+ L3_3_WB), \
+ /* Skip Caching - L3 + LLC(25%) */ \
+ MOCS_ENTRY(20, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(3), \
+ L3_3_WB), \
+ /* Skip Caching - L3 + LLC(50%) */ \
+ MOCS_ENTRY(21, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(1), \
+ L3_3_WB), \
+ /* Skip Caching - L3 + LLC(75%) */ \
+ MOCS_ENTRY(22, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_RSC(1) | LE_SCC(3), \
+ L3_3_WB), \
+ /* Skip Caching - L3 + LLC(87.5%) */ \
+ MOCS_ENTRY(23, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_RSC(1) | LE_SCC(7), \
+ L3_3_WB), \
+ /* HW Reserved - SW program but never use */ \
+ MOCS_ENTRY(62, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
+ L3_1_UC), \
+ /* HW Reserved - SW program but never use */ \
+ MOCS_ENTRY(63, \
+ LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
+ L3_1_UC)
+
+static const struct drm_i915_mocs_entry icelake_mocs_table[] = {
+ GEN11_MOCS_ENTRIES
};
/**
@@ -178,13 +252,19 @@ static bool get_mocs_settings(struct drm_i915_private *dev_priv,
{
bool result = false;
- if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv) ||
- IS_ICELAKE(dev_priv)) {
+ if (IS_ICELAKE(dev_priv)) {
+ table->size = ARRAY_SIZE(icelake_mocs_table);
+ table->table = icelake_mocs_table;
+ table->n_entries = GEN11_NUM_MOCS_ENTRIES;
+ result = true;
+ } else if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
table->size = ARRAY_SIZE(skylake_mocs_table);
+ table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->table = skylake_mocs_table;
result = true;
} else if (IS_GEN9_LP(dev_priv)) {
table->size = ARRAY_SIZE(broxton_mocs_table);
+ table->n_entries = GEN9_NUM_MOCS_ENTRIES;
table->table = broxton_mocs_table;
result = true;
} else {
@@ -193,7 +273,7 @@ static bool get_mocs_settings(struct drm_i915_private *dev_priv,
}
/* WaDisableSkipCaching:skl,bxt,kbl,glk */
- if (IS_GEN9(dev_priv)) {
+ if (IS_GEN(dev_priv, 9)) {
int i;
for (i = 0; i < table->size; i++)
@@ -226,6 +306,19 @@ static i915_reg_t mocs_register(enum intel_engine_id engine_id, int index)
}
}
+/*
+ * Get control_value from MOCS entry taking into account when it's not used:
+ * 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 (table->table[index].used)
+ return table->table[index].control_value;
+
+ return table->table[I915_MOCS_PTE].control_value;
+}
+
/**
* intel_mocs_init_engine() - emit the mocs control table
* @engine: The engine for whom to emit the registers.
@@ -238,27 +331,23 @@ void intel_mocs_init_engine(struct intel_engine_cs *engine)
struct drm_i915_private *dev_priv = engine->i915;
struct drm_i915_mocs_table table;
unsigned int index;
+ u32 unused_value;
if (!get_mocs_settings(dev_priv, &table))
return;
- GEM_BUG_ON(table.size > GEN9_NUM_MOCS_ENTRIES);
-
- for (index = 0; index < table.size; index++)
- I915_WRITE(mocs_register(engine->id, index),
- table.table[index].control_value);
-
- /*
- * Ok, now set the unused entries to uncached. These entries
- * are officially undefined and no contract for the contents
- * and settings is given for these entries.
- *
- * Entry 0 in the table is uncached - so we are just writing
- * that value to all the used entries.
- */
- for (; index < GEN9_NUM_MOCS_ENTRIES; index++)
- I915_WRITE(mocs_register(engine->id, index),
- table.table[0].control_value);
+ /* Set unused values to PTE */
+ unused_value = table.table[I915_MOCS_PTE].control_value;
+
+ for (index = 0; index < table.size; index++) {
+ u32 value = get_entry_control(&table, index);
+
+ I915_WRITE(mocs_register(engine->id, index), value);
+ }
+
+ /* All remaining entries are also unused */
+ for (; index < table.n_entries; index++)
+ I915_WRITE(mocs_register(engine->id, index), unused_value);
}
/**
@@ -276,33 +365,32 @@ static int emit_mocs_control_table(struct i915_request *rq,
{
enum intel_engine_id engine = rq->engine->id;
unsigned int index;
+ u32 unused_value;
u32 *cs;
- if (WARN_ON(table->size > GEN9_NUM_MOCS_ENTRIES))
+ if (GEM_WARN_ON(table->size > table->n_entries))
return -ENODEV;
- cs = intel_ring_begin(rq, 2 + 2 * GEN9_NUM_MOCS_ENTRIES);
+ /* Set unused values to PTE */
+ unused_value = table->table[I915_MOCS_PTE].control_value;
+
+ cs = intel_ring_begin(rq, 2 + 2 * table->n_entries);
if (IS_ERR(cs))
return PTR_ERR(cs);
- *cs++ = MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES);
+ *cs++ = MI_LOAD_REGISTER_IMM(table->n_entries);
for (index = 0; index < table->size; index++) {
+ u32 value = get_entry_control(table, index);
+
*cs++ = i915_mmio_reg_offset(mocs_register(engine, index));
- *cs++ = table->table[index].control_value;
+ *cs++ = value;
}
- /*
- * Ok, now set the unused entries to uncached. These entries
- * are officially undefined and no contract for the contents
- * and settings is given for these entries.
- *
- * Entry 0 in the table is uncached - so we are just writing
- * that value to all the used entries.
- */
- for (; index < GEN9_NUM_MOCS_ENTRIES; index++) {
+ /* All remaining entries are also unused */
+ for (; index < table->n_entries; index++) {
*cs++ = i915_mmio_reg_offset(mocs_register(engine, index));
- *cs++ = table->table[0].control_value;
+ *cs++ = unused_value;
}
*cs++ = MI_NOOP;
@@ -311,12 +399,24 @@ static int emit_mocs_control_table(struct i915_request *rq,
return 0;
}
+/*
+ * Get l3cc_value from MOCS entry taking into account when it's not used:
+ * 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 (table->table[index].used)
+ return table->table[index].l3cc_value;
+
+ return table->table[I915_MOCS_PTE].l3cc_value;
+}
+
static inline u32 l3cc_combine(const struct drm_i915_mocs_table *table,
u16 low,
u16 high)
{
- return table->table[low].l3cc_value |
- table->table[high].l3cc_value << 16;
+ return low | high << 16;
}
/**
@@ -333,38 +433,43 @@ static inline u32 l3cc_combine(const struct drm_i915_mocs_table *table,
static int emit_mocs_l3cc_table(struct i915_request *rq,
const struct drm_i915_mocs_table *table)
{
+ u16 unused_value;
unsigned int i;
u32 *cs;
- if (WARN_ON(table->size > GEN9_NUM_MOCS_ENTRIES))
+ if (GEM_WARN_ON(table->size > table->n_entries))
return -ENODEV;
- cs = intel_ring_begin(rq, 2 + GEN9_NUM_MOCS_ENTRIES);
+ /* Set unused values to PTE */
+ unused_value = table->table[I915_MOCS_PTE].l3cc_value;
+
+ cs = intel_ring_begin(rq, 2 + table->n_entries);
if (IS_ERR(cs))
return PTR_ERR(cs);
- *cs++ = MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES / 2);
+ *cs++ = MI_LOAD_REGISTER_IMM(table->n_entries / 2);
+
+ for (i = 0; i < table->size / 2; i++) {
+ u16 low = get_entry_l3cc(table, 2 * i);
+ u16 high = get_entry_l3cc(table, 2 * i + 1);
- for (i = 0; i < table->size/2; i++) {
*cs++ = i915_mmio_reg_offset(GEN9_LNCFCMOCS(i));
- *cs++ = l3cc_combine(table, 2 * i, 2 * i + 1);
+ *cs++ = l3cc_combine(table, low, high);
}
+ /* Odd table size - 1 left over */
if (table->size & 0x01) {
- /* Odd table size - 1 left over */
+ u16 low = get_entry_l3cc(table, 2 * i);
+
*cs++ = i915_mmio_reg_offset(GEN9_LNCFCMOCS(i));
- *cs++ = l3cc_combine(table, 2 * i, 0);
+ *cs++ = l3cc_combine(table, low, unused_value);
i++;
}
- /*
- * Now set the rest of the table to uncached - use entry 0 as
- * this will be uncached. Leave the last pair uninitialised as
- * they are reserved by the hardware.
- */
- for (; i < GEN9_NUM_MOCS_ENTRIES / 2; i++) {
+ /* All remaining entries are also unused */
+ for (; i < table->n_entries / 2; i++) {
*cs++ = i915_mmio_reg_offset(GEN9_LNCFCMOCS(i));
- *cs++ = l3cc_combine(table, 0, 0);
+ *cs++ = l3cc_combine(table, unused_value, unused_value);
}
*cs++ = MI_NOOP;
@@ -391,26 +496,35 @@ void intel_mocs_init_l3cc_table(struct drm_i915_private *dev_priv)
{
struct drm_i915_mocs_table table;
unsigned int i;
+ u16 unused_value;
if (!get_mocs_settings(dev_priv, &table))
return;
- for (i = 0; i < table.size/2; i++)
- I915_WRITE(GEN9_LNCFCMOCS(i), l3cc_combine(&table, 2*i, 2*i+1));
+ /* Set unused values to PTE */
+ unused_value = table.table[I915_MOCS_PTE].l3cc_value;
+
+ for (i = 0; i < table.size / 2; i++) {
+ u16 low = get_entry_l3cc(&table, 2 * i);
+ u16 high = get_entry_l3cc(&table, 2 * i + 1);
+
+ I915_WRITE(GEN9_LNCFCMOCS(i),
+ l3cc_combine(&table, low, high));
+ }
/* Odd table size - 1 left over */
if (table.size & 0x01) {
- I915_WRITE(GEN9_LNCFCMOCS(i), l3cc_combine(&table, 2*i, 0));
+ u16 low = get_entry_l3cc(&table, 2 * i);
+
+ I915_WRITE(GEN9_LNCFCMOCS(i),
+ l3cc_combine(&table, low, unused_value));
i++;
}
- /*
- * Now set the rest of the table to uncached - use entry 0 as
- * this will be uncached. Leave the last pair as initialised as
- * they are reserved by the hardware.
- */
- for (; i < (GEN9_NUM_MOCS_ENTRIES / 2); i++)
- I915_WRITE(GEN9_LNCFCMOCS(i), l3cc_combine(&table, 0, 0));
+ /* All remaining entries are also unused */
+ for (; i < table.n_entries / 2; i++)
+ I915_WRITE(GEN9_LNCFCMOCS(i),
+ l3cc_combine(&table, unused_value, unused_value));
}
/**
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2025-01-19 23:23:58 +0000