summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/gt/intel_mocs.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_mocs.c')
-rw-r--r--drivers/gpu/drm/i915/gt/intel_mocs.c566
1 files changed, 566 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c
new file mode 100644
index 000000000000..79df66022d3a
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_mocs.c
@@ -0,0 +1,566 @@
+/*
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions: *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "i915_drv.h"
+
+#include "intel_engine.h"
+#include "intel_mocs.h"
+#include "intel_lrc.h"
+
+/* structures required */
+struct drm_i915_mocs_entry {
+ u32 control_value;
+ u16 l3cc_value;
+ u16 used;
+};
+
+struct drm_i915_mocs_table {
+ 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_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)
+
+/* 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_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_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
+ *
+ * These are the MOCS tables that are programmed across all the rings.
+ * The control value is programmed to all the rings that support the
+ * MOCS registers. While the l3cc_values are only programmed to the
+ * LNCFCMOCS0 - LNCFCMOCS32 registers.
+ *
+ * These tables are intended to be kept reasonably consistent across
+ * 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 initialized to PTE.
+ *
+ * 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[] = {
+ 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[] = {
+ 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
+};
+
+/**
+ * get_mocs_settings()
+ * @dev_priv: i915 device.
+ * @table: Output table that will be made to point at appropriate
+ * 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
+ * to be programmed and if they need to be programmed.
+ *
+ * Return: true if there are applicable MOCS settings for the device.
+ */
+static bool get_mocs_settings(struct drm_i915_private *dev_priv,
+ struct drm_i915_mocs_table *table)
+{
+ bool result = false;
+
+ if (INTEL_GEN(dev_priv) >= 11) {
+ 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 {
+ WARN_ONCE(INTEL_GEN(dev_priv) >= 9,
+ "Platform that should have a MOCS table does not.\n");
+ }
+
+ /* WaDisableSkipCaching:skl,bxt,kbl,glk */
+ if (IS_GEN(dev_priv, 9)) {
+ int i;
+
+ for (i = 0; i < table->size; i++)
+ if (WARN_ON(table->table[i].l3cc_value &
+ (L3_ESC(1) | L3_SCC(0x7))))
+ return false;
+ }
+
+ return result;
+}
+
+static i915_reg_t mocs_register(enum intel_engine_id engine_id, int index)
+{
+ switch (engine_id) {
+ case RCS0:
+ return GEN9_GFX_MOCS(index);
+ case VCS0:
+ return GEN9_MFX0_MOCS(index);
+ case BCS0:
+ return GEN9_BLT_MOCS(index);
+ case VECS0:
+ return GEN9_VEBOX_MOCS(index);
+ case VCS1:
+ return GEN9_MFX1_MOCS(index);
+ case VCS2:
+ return GEN11_MFX2_MOCS(index);
+ default:
+ MISSING_CASE(engine_id);
+ return INVALID_MMIO_REG;
+ }
+}
+
+/*
+ * 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.
+ *
+ * This function simply emits a MI_LOAD_REGISTER_IMM command for the
+ * given table starting at the given address.
+ */
+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;
+
+ /* 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);
+}
+
+/**
+ * emit_mocs_control_table() - emit the mocs control table
+ * @rq: Request to set up the MOCS table for.
+ * @table: The values to program into the control regs.
+ *
+ * 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 i915_request *rq,
+ const struct drm_i915_mocs_table *table)
+{
+ enum intel_engine_id engine = rq->engine->id;
+ unsigned int index;
+ u32 unused_value;
+ u32 *cs;
+
+ if (GEM_WARN_ON(table->size > table->n_entries))
+ return -ENODEV;
+
+ /* 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(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++ = value;
+ }
+
+ /* All remaining entries are also unused */
+ for (; index < table->n_entries; index++) {
+ *cs++ = i915_mmio_reg_offset(mocs_register(engine, index));
+ *cs++ = unused_value;
+ }
+
+ *cs++ = MI_NOOP;
+ intel_ring_advance(rq, cs);
+
+ 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 low | high << 16;
+}
+
+/**
+ * emit_mocs_l3cc_table() - emit the mocs control table
+ * @rq: Request to set up the MOCS table for.
+ * @table: The values to program into the control regs.
+ *
+ * This function simply emits a MI_LOAD_REGISTER_IMM command for the
+ * given table starting at the given address. This register set is
+ * programmed in pairs.
+ *
+ * Return: 0 on success, otherwise the error status.
+ */
+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 (GEM_WARN_ON(table->size > table->n_entries))
+ return -ENODEV;
+
+ /* 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(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);
+
+ *cs++ = i915_mmio_reg_offset(GEN9_LNCFCMOCS(i));
+ *cs++ = l3cc_combine(table, low, high);
+ }
+
+ /* Odd table size - 1 left over */
+ if (table->size & 0x01) {
+ u16 low = get_entry_l3cc(table, 2 * i);
+
+ *cs++ = i915_mmio_reg_offset(GEN9_LNCFCMOCS(i));
+ *cs++ = l3cc_combine(table, low, unused_value);
+ 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, unused_value, unused_value);
+ }
+
+ *cs++ = MI_NOOP;
+ intel_ring_advance(rq, cs);
+
+ return 0;
+}
+
+/**
+ * intel_mocs_init_l3cc_table() - program the mocs control table
+ * @dev_priv: i915 device private
+ *
+ * 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_i915_private *dev_priv)
+{
+ struct drm_i915_mocs_table table;
+ unsigned int i;
+ u16 unused_value;
+
+ if (!get_mocs_settings(dev_priv, &table))
+ return;
+
+ /* 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) {
+ u16 low = get_entry_l3cc(&table, 2 * i);
+
+ I915_WRITE(GEN9_LNCFCMOCS(i),
+ l3cc_combine(&table, low, unused_value));
+ i++;
+ }
+
+ /* 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));
+}
+
+/**
+ * intel_rcs_context_init_mocs() - program the MOCS register.
+ * @rq: Request to set up the MOCS tables for.
+ *
+ * This function will emit a batch buffer with the values required for
+ * programming the MOCS register values for all the currently supported
+ * rings.
+ *
+ * These registers are partially stored in the RCS context, so they are
+ * emitted at the same time so that when a context is created these registers
+ * are set up. These registers have to be emitted into the start of the
+ * context as setting the ELSP will re-init some of these registers back
+ * to the hw values.
+ *
+ * Return: 0 on success, otherwise the error status.
+ */
+int intel_rcs_context_init_mocs(struct i915_request *rq)
+{
+ struct drm_i915_mocs_table t;
+ int ret;
+
+ if (get_mocs_settings(rq->i915, &t)) {
+ /* Program the RCS control registers */
+ ret = emit_mocs_control_table(rq, &t);
+ if (ret)
+ return ret;
+
+ /* Now program the l3cc registers */
+ ret = emit_mocs_l3cc_table(rq, &t);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}