[igt-dev] [PATCH i-g-t v1 1/1] gem_ctx_isolation.c - Gen11 enabling for context isolation test

[Dale B Stimson]

This patch is a change to igt file tests/i915/gem_ctx_isolation.c to add
Gen11 support.

This patch enables Gen11 support.

This patch accounts for whitelisted registers appropriately for the
different Gen levels.

This patch accounts for the changed MMIO offsets of Gen11.

This patch redefines MAX_REG from 0x40000 to 0x200000 due to the
larger total register space for Gen11 mmio offsets.  The resulting
big sparse array allocations present a good candidate for future
optimization of memory usage.

The current Gen11 SKU has two video engines (with indexes 0 and 2,
for VCS0 and VCS2), with VCS1 not being used.

Current kernel and igt limitations only allow for VCS0 and VCS1.
Those limitations are in the process of being removed.  See for
example the RFC/PATCH series on igt-dev from Andy Shyti:
    [igt-dev] [RFC PATCH v9 0/5] new engine discovery interface
which depends on in-process kernel "media scalability" patches.

Lacking the above infrastructure at the moment:

The array of registers to be tested includes VCS2 and VCS3 registers.
They are present as a provision for the future, but they will
not actually be tested as those engines are not yet known to the
underlying infrastructure.

When run on Gen11 this patch skips the sub-tests for the non-existent VCS1
with these warnings:
  Test requirement not met in function gem_require_engine, file ../lib/igt_gt.h:114:
  Test requirement: gem_has_engine(gem_fd, class, instance)

Anticipated for the future:

Take advantage of the new infrastructure to dynamically determine which
engines are present and test the same register(s) in each of them.

Add support for CCS.

Reduce memory requirements by avoiding sparse register-space arrays.

Signed-off-by: Dale B Stimson <dale.b.stimson at intel.com>
---
 tests/i915/gem_ctx_isolation.c | 57 +++++++++++++++++++++++++++-------
 1 file changed, 45 insertions(+), 12 deletions(-)

diff --git a/tests/i915/gem_ctx_isolation.c b/tests/i915/gem_ctx_isolation.c
index 839d49ad..4628e499 100644
--- a/tests/i915/gem_ctx_isolation.c
+++ b/tests/i915/gem_ctx_isolation.c
@@ -24,7 +24,7 @@
 #include "igt.h"
 #include "igt_dummyload.h"
 
-#define MAX_REG 0x40000
+#define MAX_REG 0x200000
 #define NUM_REGS (MAX_REG / sizeof(uint32_t))
 
 #define PAGE_ALIGN(x) ALIGN(x, 4096)
@@ -41,6 +41,8 @@ enum {
 	BCS0 = ENGINE(I915_ENGINE_CLASS_COPY, 0),
 	VCS0 = ENGINE(I915_ENGINE_CLASS_VIDEO, 0),
 	VCS1 = ENGINE(I915_ENGINE_CLASS_VIDEO, 1),
+	VCS2 = ENGINE(I915_ENGINE_CLASS_VIDEO, 2),
+	VCS3 = ENGINE(I915_ENGINE_CLASS_VIDEO, 3),
 	VECS0 = ENGINE(I915_ENGINE_CLASS_VIDEO_ENHANCE, 0),
 };
 
@@ -52,10 +54,12 @@ enum {
 #define GEN7 (ALL << 7)
 #define GEN8 (ALL << 8)
 #define GEN9 (ALL << 9)
+#define GEN10 (ALL << 10)
+#define GEN11 (ALL << 11)
 
 #define NOCTX 0
 
-#define LAST_KNOWN_GEN 10
+#define LAST_KNOWN_GEN 11
 
 static const struct named_register {
 	const char *name;
@@ -125,30 +129,59 @@ static const struct named_register {
 	{ "PERF_CNT_1", NOCTX, RCS0, 0x91b8, 2 },
 	{ "PERF_CNT_2", NOCTX, RCS0, 0x91c0, 2 },
 
+	/* Begin - registers privileged at one time or another */
+
 	/* Privileged (enabled by w/a + FORCE_TO_NONPRIV) */
 	{ "CTX_PREEMPT", NOCTX /* GEN_RANGE(9, 10) */, RCS0, 0x2248 },
-	{ "CS_CHICKEN1", GEN_RANGE(9, 10), RCS0, 0x2580 },
-	{ "HDC_CHICKEN1", GEN_RANGE(9, 10), RCS0, 0x7304 },
-	{ "L3SQREG1", GEN8, RCS0, 0xb010 },
+
+	/* FORCE_TO_NONPRIV for gen 9-10, present non-priv thereafter. */
+	{ "CS_CHICKEN1", GEN9, RCS0, 0x2580 },
+
+	/* FORCE_TO_NONPRIV for gen 9, present non-priv Gen 10-11. */
+	{ "HDC_CHICKEN1", GEN_RANGE(9, 11), RCS0, 0x7304 },
+
+	/* Removed in Gen11 */
+	{ "L3SQREG1", GEN_RANGE(8, 10), RCS0, 0xb010 },
+
+	/* NOPRIV for Gen11 */
+	{ "HALF_SLICE_CHICKEN7", GEN_RANGE(11, 11), RCS0, 0xe194 },
+
+	/* NOPRIV for Gen11 */
+	{ "SAMPLER_MODE", GEN_RANGE(11, 11), RCS0, 0xE18C },
+
+	/* End - registers privileged at one time or another */
 
 	{ "BCS_GPR", GEN9, BCS0, 0x22600, 32 },
 	{ "BCS_SWCTRL", GEN8, BCS0, 0x22200 },
 
-	{ "VCS0_GPR", GEN9, VCS0, 0x12600, 32 },
 	{ "MFC_VDBOX1", NOCTX, VCS0, 0x12800, 64 },
-
-	{ "VCS1_GPR", GEN9, VCS1, 0x1c600, 32 },
 	{ "MFC_VDBOX2", NOCTX, VCS1, 0x1c800, 64 },
 
-	{ "VECS_GPR", GEN9, VECS0, 0x1a600, 32 },
+	{ "VCS0_GPR", GEN_RANGE(9, 10), VCS0, 0x12600, 32 },
+	{ "VCS1_GPR", GEN_RANGE(9, 10), VCS1, 0x1c600, 32 },
+	{ "VECS_GPR", GEN_RANGE(9, 10), VECS0, 0x1a600, 32 },
+
+	{ "VCS0_GPR", GEN11, VCS0, 0x1c0600, 32 },
+	{ "VCS1_GPR", GEN11, VCS1, 0x1c4600, 32 },
+	{ "VCS2_GPR", GEN11, VCS2, 0x1d0600, 32 },
+	{ "VCS3_GPR", GEN11, VCS3, 0x1d4600, 32 },
+	{ "VECS_GPR", GEN11, VECS0, 0x1c8600, 32 },
 
 	{}
 }, ignore_registers[] = {
 	{ "RCS timestamp", GEN6, ~0u, 0x2358 },
-	{ "VCS0 timestamp", GEN7, ~0u, 0x12358 },
-	{ "VCS1 timestamp", GEN7, ~0u, 0x1c358 },
 	{ "BCS timestamp", GEN7, ~0u, 0x22358 },
-	{ "VECS timestamp", GEN8, ~0u, 0x1a358 },
+
+	{ "VCS0 timestamp", GEN_RANGE(7, 10), ~0u, 0x12358 },
+	{ "VCS1 timestamp", GEN_RANGE(7, 10), ~0u, 0x1c358 },
+	{ "VECS timestamp", GEN_RANGE(8, 10), ~0u, 0x1a358 },
+
+	{ "VCS0 timestamp", GEN11, ~0u, 0x1c0358 },
+	{ "VCS1 timestamp", GEN11, ~0u, 0x1c4358 },
+	{ "VCS2 timestamp", GEN11, ~0u, 0x1d0358 },
+	{ "VCS3 timestamp", GEN11, ~0u, 0x1d4358 },
+	{ "VECS timestamp", GEN11, ~0u, 0x1c8358 },
+
 	{}
 };
 
-- 
2.20.1