[igt-dev] [PATCH i-g-t] i915/gem_mocs_settings: Add mocs table for icelake

[Prathap Kumar Valsan via igt-dev <igt-dev@lists.freedesktop.org>]

From: "Kumar Valsan, Prathap" <prathap.kumar.valsan@intel.com>

This patch adds mocs table for icelake with expected L3 and eDRAM
control values.

Signed-off-by: Kumar Valsan, Prathap <prathap.kumar.valsan@intel.com>
---
 tests/i915/gem_mocs_settings.c | 145 +++++++++++++++++++++++++++------
 1 file changed, 122 insertions(+), 23 deletions(-)

diff --git a/tests/i915/gem_mocs_settings.c b/tests/i915/gem_mocs_settings.c
index 5b3b6bc1..b84273a0 100644
--- a/tests/i915/gem_mocs_settings.c
+++ b/tests/i915/gem_mocs_settings.c
@@ -33,6 +33,10 @@
 #include "igt_sysfs.h"
 
 #define MAX_NUMBER_MOCS_REGISTERS	(64)
+#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. */
+#define MOCS_PTE_INDEX		(0x1)
+
 enum {
 	NONE,
 	RESET,
@@ -65,6 +69,7 @@ static const char * const test_modes[] = {
 struct mocs_entry {
 	uint32_t	control_value;
 	uint16_t	l3cc_value;
+	uint8_t		used;
 };
 
 struct mocs_table {
@@ -73,37 +78,113 @@ struct mocs_table {
 };
 
 /* The first entries in the MOCS tables are defined by uABI */
-static const struct mocs_entry skylake_mocs_table[] = {
-	{ 0x00000009, 0x0010 },
-	{ 0x00000038, 0x0030 },
-	{ 0x0000003b, 0x0030 },
+static struct mocs_entry icelake_mocs_table[GEN11_NUM_MOCS_ENTRIES] = {
+	[0]  = { 0x00000005, 0x0010, 0x1 },
+	[1]  = { 0x00000004, 0x0030, 0x1 },
+	[2]  = { 0x00000037, 0x0030, 0x1 },
+	[3]  = { 0x00000005, 0x0010, 0x1 },
+	[4]  = { 0x00000005, 0x0030, 0x1 },
+	[5]  = { 0x00000037, 0x0010, 0x1 },
+	[6]  = { 0x00000017, 0x0010, 0x1 },
+	[7]  = { 0x00000017, 0x0030, 0x1 },
+	[8]  = { 0x00000027, 0x0010, 0x1 },
+	[9]  = { 0x00000027, 0x0030, 0x1 },
+	[10] = { 0x00000077, 0x0010, 0x1 },
+	[11] = { 0x00000077, 0x0030, 0x1 },
+	[12] = { 0x00000057, 0x0010, 0x1 },
+	[13] = { 0x00000057, 0x0030, 0x1 },
+	[14] = { 0x00000067, 0x0010, 0x1 },
+	[15] = { 0x00000067, 0x0030, 0x1 },
+	[18] = { 0x00060037, 0x0030, 0x1 },
+	[19] = { 0x00000737, 0x0030, 0x1 },
+	[20] = { 0x00000337, 0x0030, 0x1 },
+	[21] = { 0x00000137, 0x0030, 0x1 },
+	[22] = { 0x000003b7, 0x0030, 0x1 },
+	[23] = { 0x000007b7, 0x0030, 0x1 },
+	[62] = { 0x00000037, 0x0010, 0x1 },
+	[63] = { 0x00000037, 0x0010, 0x1 },
+};
+
+static struct mocs_entry dirty_icelake_mocs_table[GEN11_NUM_MOCS_ENTRIES] = {
+	[0]  = { 0x0007FFFF, 0x003F },
+	[1]  = { 0x0007FFFF, 0x003F },
+	[2]  = { 0x0007FFFF, 0x003F },
+	[3]  = { 0x0007FFFF, 0x003F },
+	[4]  = { 0x0007FFFF, 0x003F },
+	[5]  = { 0x0007FFFF, 0x003F },
+	[6]  = { 0x0007FFFF, 0x003F },
+	[7]  = { 0x0007FFFF, 0x003F },
+	[8]  = { 0x0007FFFF, 0x003F },
+	[9]  = { 0x0007FFFF, 0x003F },
+	[10] = { 0x0007FFFF, 0x003F },
+	[11] = { 0x0007FFFF, 0x003F },
+	[12] = { 0x0007FFFF, 0x003F },
+	[13] = { 0x0007FFFF, 0x003F },
+	[14] = { 0x0007FFFF, 0x003F },
+	[15] = { 0x0007FFFF, 0x003F },
+	[18] = { 0x0007FFFF, 0x003F },
+	[19] = { 0x0007FFFF, 0x003F },
+	[21] = { 0x0007FFFF, 0x003F },
+	[22] = { 0x0007FFFF, 0x003F },
+	[23] = { 0x0007FFFF, 0x003F },
+	[62] = { 0x0007FFFF, 0x003F },
+	[63] = { 0x0007FFFF, 0x003F },
 };
 
-static const struct mocs_entry dirty_skylake_mocs_table[] = {
-	{ 0x00003FFF, 0x003F }, /* no snoop bit */
-	{ 0x00003FFF, 0x003F },
-	{ 0x00003FFF, 0x003F },
+static struct mocs_entry skylake_mocs_table[GEN9_NUM_MOCS_ENTRIES] = {
+	{ 0x00000009, 0x0010, 0x1 },
+	{ 0x00000038, 0x0030, 0x1 },
+	{ 0x0000003b, 0x0030, 0x1 },
 };
 
-static const struct mocs_entry broxton_mocs_table[] = {
-	{ 0x00000009, 0x0010 },
-	{ 0x00000038, 0x0030 },
-	{ 0x00000039, 0x0030 },
+static struct mocs_entry dirty_skylake_mocs_table[GEN9_NUM_MOCS_ENTRIES] = {
+	{ 0x00003FFF, 0x003F, 0x1 }, /* no snoop bit */
+	{ 0x00003FFF, 0x003F, 0x1 },
+	{ 0x00003FFF, 0x003F, 0x1 },
 };
 
-static const struct mocs_entry dirty_broxton_mocs_table[] = {
-	{ 0x00007FFF, 0x003F },
-	{ 0x00007FFF, 0x003F },
-	{ 0x00007FFF, 0x003F },
+static struct mocs_entry broxton_mocs_table[GEN9_NUM_MOCS_ENTRIES] = {
+	{ 0x00000009, 0x0010, 0x1 },
+	{ 0x00000038, 0x0030, 0x1 },
+	{ 0x00000039, 0x0030, 0x1 },
 };
 
-static const uint32_t write_values[] = {
-	0xFFFFFFFF,
-	0xFFFFFFFF,
-	0xFFFFFFFF,
-	0xFFFFFFFF
+static struct mocs_entry dirty_broxton_mocs_table[GEN9_NUM_MOCS_ENTRIES] = {
+	{ 0x00007FFF, 0x003F, 0x1 },
+	{ 0x00007FFF, 0x003F, 0x1 },
+	{ 0x00007FFF, 0x003F, 0x1 },
 };
 
+static uint32_t write_values[MAX_NUMBER_MOCS_REGISTERS];
+
+static void set_mocs_settings(void)
+{
+	uint8_t index;
+	/* Set un-used entries to PTE */
+	for (index = 0; index < MAX_NUMBER_MOCS_REGISTERS; index++) {
+		if (index < GEN9_NUM_MOCS_ENTRIES) {
+			if (!skylake_mocs_table[index].used) {
+				skylake_mocs_table[index] =  skylake_mocs_table[MOCS_PTE_INDEX];
+				dirty_skylake_mocs_table[index] =  dirty_skylake_mocs_table[MOCS_PTE_INDEX];
+			}
+			if (!broxton_mocs_table[index].used) {
+				broxton_mocs_table[index] =  broxton_mocs_table[MOCS_PTE_INDEX];
+				dirty_broxton_mocs_table[index] =  dirty_broxton_mocs_table[MOCS_PTE_INDEX];
+			}
+			if (!icelake_mocs_table[index].used) {
+				icelake_mocs_table[index] =  icelake_mocs_table[MOCS_PTE_INDEX];
+				dirty_icelake_mocs_table[index] =  dirty_icelake_mocs_table[MOCS_PTE_INDEX];
+			}
+		} else { /*icelake has 64 entries */
+			if (!icelake_mocs_table[index].used) {
+				icelake_mocs_table[index] =  icelake_mocs_table[MOCS_PTE_INDEX];
+				dirty_icelake_mocs_table[index] =  dirty_icelake_mocs_table[MOCS_PTE_INDEX];
+			}
+		}
+	}
+	memset((char *)write_values, 0xFF, MAX_NUMBER_MOCS_REGISTERS * sizeof(uint32_t));
+}
+
 static bool get_mocs_settings(int fd, struct mocs_table *table, bool dirty)
 {
 	uint32_t devid = intel_get_drm_devid(fd);
@@ -127,6 +208,15 @@ static bool get_mocs_settings(int fd, struct mocs_table *table, bool dirty)
 			table->table = broxton_mocs_table;
 		}
 		result = true;
+	} else if (IS_ICELAKE(devid)) {
+		if (dirty) {
+			table->size  = ARRAY_SIZE(dirty_icelake_mocs_table);
+			table->table = dirty_icelake_mocs_table;
+		} else {
+			table->size  = ARRAY_SIZE(icelake_mocs_table);
+			table->table = icelake_mocs_table;
+		}
+		result = true;
 	}
 
 	return result;
@@ -374,13 +464,21 @@ static void check_mocs_values(int fd, unsigned engine, uint32_t ctx_id, bool dir
 
 static void write_dirty_mocs(int fd, unsigned engine, uint32_t ctx_id)
 {
+	uint32_t devid = intel_get_drm_devid(fd);
+	int num_of_mocs_entries;
+
+	if (IS_ICELAKE(devid))
+		num_of_mocs_entries = GEN11_NUM_MOCS_ENTRIES;
+	else
+		num_of_mocs_entries = GEN9_NUM_MOCS_ENTRIES;
+
 	write_registers(fd, ctx_id, get_engine_base(engine),
-			write_values, ARRAY_SIZE(write_values),
+			write_values, num_of_mocs_entries,
 			engine);
 
 	if (engine == I915_EXEC_RENDER)
 		write_registers(fd, ctx_id, GEN9_LNCFCMOCS0,
-				write_values, ARRAY_SIZE(write_values),
+				write_values, num_of_mocs_entries/2,
 				engine);
 }
 
@@ -440,6 +538,7 @@ igt_main
 		fd = drm_open_driver_master(DRIVER_INTEL); /* for SECURE */
 		igt_require_gem(fd);
 		gem_require_mocs_registers(fd);
+		set_mocs_settings();
 		igt_require(get_mocs_settings(fd, &table, false));
 	}
 
-- 
2.20.1

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