/**
* get_mocs_settings()
- * @dev: DRM device.
+ * @dev_priv: i915 device.
* @table: Output table that will be made to point at appropriate
- * MOCS values for the device.
+ * MOCS values for the device.
*
* This function will return the values of the MOCS table that needs to
* be programmed for the platform. It will return the values that need
*
* Return: true if there are applicable MOCS settings for the device.
*/
-static bool get_mocs_settings(struct drm_device *dev,
+static bool get_mocs_settings(struct drm_i915_private *dev_priv,
struct drm_i915_mocs_table *table)
{
bool result = false;
- if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) {
+ if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
table->size = ARRAY_SIZE(skylake_mocs_table);
table->table = skylake_mocs_table;
result = true;
- } else if (IS_BROXTON(dev)) {
+ } else if (IS_BROXTON(dev_priv)) {
table->size = ARRAY_SIZE(broxton_mocs_table);
table->table = broxton_mocs_table;
result = true;
} else {
- WARN_ONCE(INTEL_INFO(dev)->gen >= 9,
+ WARN_ONCE(INTEL_INFO(dev_priv)->gen >= 9,
"Platform that should have a MOCS table does not.\n");
}
}
}
+/**
+ * intel_mocs_init_engine() - emit the mocs control table
+ * @engine: The engine for whom to emit the registers.
+ *
+ * This function simply emits a MI_LOAD_REGISTER_IMM command for the
+ * given table starting at the given address.
+ *
+ * Return: 0 on success, otherwise the error status.
+ */
+int intel_mocs_init_engine(struct intel_engine_cs *engine)
+{
+ struct drm_i915_private *dev_priv = to_i915(engine->dev);
+ struct drm_i915_mocs_table table;
+ unsigned int index;
+
+ if (!get_mocs_settings(dev_priv, &table))
+ return 0;
+
+ if (WARN_ON(table.size > GEN9_NUM_MOCS_ENTRIES))
+ return -ENODEV;
+
+ 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);
+
+ return 0;
+}
+
/**
* emit_mocs_control_table() - emit the mocs control table
* @req: Request to set up the MOCS table for.
* @table: The values to program into the control regs.
- * @ring: The engine for whom to emit the registers.
*
* This function simply emits a MI_LOAD_REGISTER_IMM command for the
* given table starting at the given address.
* Return: 0 on success, otherwise the error status.
*/
static int emit_mocs_control_table(struct drm_i915_gem_request *req,
- const struct drm_i915_mocs_table *table,
- enum intel_engine_id ring)
+ const struct drm_i915_mocs_table *table)
{
struct intel_ringbuffer *ringbuf = req->ringbuf;
+ enum intel_engine_id engine = req->engine->id;
unsigned int index;
int ret;
MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES));
for (index = 0; index < table->size; index++) {
- intel_logical_ring_emit_reg(ringbuf, mocs_register(ring, index));
+ intel_logical_ring_emit_reg(ringbuf,
+ mocs_register(engine, index));
intel_logical_ring_emit(ringbuf,
table->table[index].control_value);
}
* that value to all the used entries.
*/
for (; index < GEN9_NUM_MOCS_ENTRIES; index++) {
- intel_logical_ring_emit_reg(ringbuf, mocs_register(ring, index));
- intel_logical_ring_emit(ringbuf, table->table[0].control_value);
+ intel_logical_ring_emit_reg(ringbuf,
+ mocs_register(engine, index));
+ intel_logical_ring_emit(ringbuf,
+ table->table[0].control_value);
}
intel_logical_ring_emit(ringbuf, MI_NOOP);
return 0;
}
+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;
+}
+
/**
* emit_mocs_l3cc_table() - emit the mocs control table
* @req: Request to set up the MOCS table for.
const struct drm_i915_mocs_table *table)
{
struct intel_ringbuffer *ringbuf = req->ringbuf;
- unsigned int count;
unsigned int i;
- u32 value;
- u32 filler = (table->table[0].l3cc_value & 0xffff) |
- ((table->table[0].l3cc_value & 0xffff) << 16);
int ret;
if (WARN_ON(table->size > GEN9_NUM_MOCS_ENTRIES))
intel_logical_ring_emit(ringbuf,
MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES / 2));
- for (i = 0, count = 0; i < table->size / 2; i++, count += 2) {
- value = (table->table[count].l3cc_value & 0xffff) |
- ((table->table[count + 1].l3cc_value & 0xffff) << 16);
-
+ for (i = 0; i < table->size/2; i++) {
intel_logical_ring_emit_reg(ringbuf, GEN9_LNCFCMOCS(i));
- intel_logical_ring_emit(ringbuf, value);
+ intel_logical_ring_emit(ringbuf,
+ l3cc_combine(table, 2*i, 2*i+1));
}
if (table->size & 0x01) {
/* Odd table size - 1 left over */
- value = (table->table[count].l3cc_value & 0xffff) |
- ((table->table[0].l3cc_value & 0xffff) << 16);
- } else
- value = filler;
+ intel_logical_ring_emit_reg(ringbuf, GEN9_LNCFCMOCS(i));
+ intel_logical_ring_emit(ringbuf, l3cc_combine(table, 2*i, 0));
+ i++;
+ }
/*
* Now set the rest of the table to uncached - use entry 0 as
*/
for (; i < GEN9_NUM_MOCS_ENTRIES / 2; i++) {
intel_logical_ring_emit_reg(ringbuf, GEN9_LNCFCMOCS(i));
- intel_logical_ring_emit(ringbuf, value);
-
- value = filler;
+ intel_logical_ring_emit(ringbuf, l3cc_combine(table, 0, 0));
}
intel_logical_ring_emit(ringbuf, MI_NOOP);
return 0;
}
+/**
+ * intel_mocs_init_l3cc_table() - program the mocs control table
+ * @dev: The the device to be programmed.
+ *
+ * This function simply programs the mocs registers for the given table
+ * starting at the given address. This register set is programmed in pairs.
+ *
+ * These registers may get programmed more than once, it is simpler to
+ * re-program 32 registers than maintain the state of when they were programmed.
+ * We are always reprogramming with the same values and this only on context
+ * start.
+ *
+ * Return: Nothing.
+ */
+void intel_mocs_init_l3cc_table(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_i915_mocs_table table;
+ unsigned int i;
+
+ 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));
+
+ /* Odd table size - 1 left over */
+ if (table.size & 0x01) {
+ I915_WRITE(GEN9_LNCFCMOCS(i), l3cc_combine(&table, 2*i, 0));
+ 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));
+}
+
/**
* intel_rcs_context_init_mocs() - program the MOCS register.
* @req: Request to set up the MOCS tables for.
struct drm_i915_mocs_table t;
int ret;
- if (get_mocs_settings(req->engine->dev, &t)) {
- struct drm_i915_private *dev_priv = req->i915;
- struct intel_engine_cs *engine;
- enum intel_engine_id id;
-
- /* Program the control registers */
- for_each_engine_id(engine, dev_priv, id) {
- ret = emit_mocs_control_table(req, &t, id);
- if (ret)
- return ret;
- }
+ if (get_mocs_settings(req->i915, &t)) {
+ /* Program the RCS control registers */
+ ret = emit_mocs_control_table(req, &t);
+ if (ret)
+ return ret;
/* Now program the l3cc registers */
ret = emit_mocs_l3cc_table(req, &t);
projects / linux-beck.git / commitdiff