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From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Subject: [Intel-gfx] [PATCH 02/57] drm/i915/selftests: Exercise relative mmio paths to non-privileged registers
Date: Mon,  1 Feb 2021 08:56:20 +0000
Message-ID: <20210201085715.27435-2-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <20210201085715.27435-1-chris@chris-wilson.co.uk>

Verify that context isolation is also preserved when accessing
context-local registers with relative-mmio commands.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/selftest_lrc.c | 88 ++++++++++++++++++++------
 1 file changed, 67 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index 7bf34c439876..0524232378e4 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -910,7 +910,9 @@ create_user_vma(struct i915_address_space *vm, unsigned long size)
 }
 
 static struct i915_vma *
-store_context(struct intel_context *ce, struct i915_vma *scratch)
+store_context(struct intel_context *ce,
+	      struct i915_vma *scratch,
+	      bool relative)
 {
 	struct i915_vma *batch;
 	u32 dw, x, *cs, *hw;
@@ -939,6 +941,9 @@ store_context(struct intel_context *ce, struct i915_vma *scratch)
 	hw += LRC_STATE_OFFSET / sizeof(*hw);
 	do {
 		u32 len = hw[dw] & 0x7f;
+		u32 cmd = MI_STORE_REGISTER_MEM_GEN8;
+		u32 offset = 0;
+		u32 mask = ~0;
 
 		if (hw[dw] == 0) {
 			dw++;
@@ -950,11 +955,19 @@ store_context(struct intel_context *ce, struct i915_vma *scratch)
 			continue;
 		}
 
+		if (hw[dw] & MI_LRI_LRM_CS_MMIO) {
+			mask = 0xfff;
+			if (relative)
+				cmd |= MI_LRI_LRM_CS_MMIO;
+			else
+				offset = ce->engine->mmio_base;
+		}
+
 		dw++;
 		len = (len + 1) / 2;
 		while (len--) {
-			*cs++ = MI_STORE_REGISTER_MEM_GEN8;
-			*cs++ = hw[dw];
+			*cs++ = cmd;
+			*cs++ = (hw[dw] & mask) + offset;
 			*cs++ = lower_32_bits(scratch->node.start + x);
 			*cs++ = upper_32_bits(scratch->node.start + x);
 
@@ -993,6 +1006,7 @@ static struct i915_request *
 record_registers(struct intel_context *ce,
 		 struct i915_vma *before,
 		 struct i915_vma *after,
+		 bool relative,
 		 u32 *sema)
 {
 	struct i915_vma *b_before, *b_after;
@@ -1000,11 +1014,11 @@ record_registers(struct intel_context *ce,
 	u32 *cs;
 	int err;
 
-	b_before = store_context(ce, before);
+	b_before = store_context(ce, before, relative);
 	if (IS_ERR(b_before))
 		return ERR_CAST(b_before);
 
-	b_after = store_context(ce, after);
+	b_after = store_context(ce, after, relative);
 	if (IS_ERR(b_after)) {
 		rq = ERR_CAST(b_after);
 		goto err_before;
@@ -1074,7 +1088,8 @@ record_registers(struct intel_context *ce,
 	goto err_after;
 }
 
-static struct i915_vma *load_context(struct intel_context *ce, u32 poison)
+static struct i915_vma *
+load_context(struct intel_context *ce, u32 poison, bool relative)
 {
 	struct i915_vma *batch;
 	u32 dw, *cs, *hw;
@@ -1101,7 +1116,10 @@ static struct i915_vma *load_context(struct intel_context *ce, u32 poison)
 	hw = defaults;
 	hw += LRC_STATE_OFFSET / sizeof(*hw);
 	do {
+		u32 cmd = MI_INSTR(0x22, 0);
 		u32 len = hw[dw] & 0x7f;
+		u32 offset = 0;
+		u32 mask = ~0;
 
 		if (hw[dw] == 0) {
 			dw++;
@@ -1113,11 +1131,19 @@ static struct i915_vma *load_context(struct intel_context *ce, u32 poison)
 			continue;
 		}
 
+		if (hw[dw] & MI_LRI_LRM_CS_MMIO) {
+			mask = 0xfff;
+			if (relative)
+				cmd |= MI_LRI_LRM_CS_MMIO;
+			else
+				offset = ce->engine->mmio_base;
+		}
+
 		dw++;
+		*cs++ = cmd | len;
 		len = (len + 1) / 2;
-		*cs++ = MI_LOAD_REGISTER_IMM(len);
 		while (len--) {
-			*cs++ = hw[dw];
+			*cs++ = (hw[dw] & mask) + offset;
 			*cs++ = poison;
 			dw += 2;
 		}
@@ -1134,14 +1160,18 @@ static struct i915_vma *load_context(struct intel_context *ce, u32 poison)
 	return batch;
 }
 
-static int poison_registers(struct intel_context *ce, u32 poison, u32 *sema)
+static int
+poison_registers(struct intel_context *ce,
+		 u32 poison,
+		 bool relative,
+		 u32 *sema)
 {
 	struct i915_request *rq;
 	struct i915_vma *batch;
 	u32 *cs;
 	int err;
 
-	batch = load_context(ce, poison);
+	batch = load_context(ce, poison, relative);
 	if (IS_ERR(batch))
 		return PTR_ERR(batch);
 
@@ -1191,7 +1221,7 @@ static int compare_isolation(struct intel_engine_cs *engine,
 			     struct i915_vma *ref[2],
 			     struct i915_vma *result[2],
 			     struct intel_context *ce,
-			     u32 poison)
+			     u32 poison, bool relative)
 {
 	u32 x, dw, *hw, *lrc;
 	u32 *A[2], *B[2];
@@ -1240,6 +1270,7 @@ static int compare_isolation(struct intel_engine_cs *engine,
 	hw += LRC_STATE_OFFSET / sizeof(*hw);
 	do {
 		u32 len = hw[dw] & 0x7f;
+		bool is_relative = relative;
 
 		if (hw[dw] == 0) {
 			dw++;
@@ -1251,6 +1282,9 @@ static int compare_isolation(struct intel_engine_cs *engine,
 			continue;
 		}
 
+		if (!(hw[dw] & MI_LRI_LRM_CS_MMIO))
+			is_relative = false;
+
 		dw++;
 		len = (len + 1) / 2;
 		while (len--) {
@@ -1262,9 +1296,10 @@ static int compare_isolation(struct intel_engine_cs *engine,
 					break;
 
 				default:
-					pr_err("%s[%d]: Mismatch for register %4x, default %08x, reference %08x, result (%08x, %08x), poison %08x, context %08x\n",
-					       engine->name, dw,
-					       hw[dw], hw[dw + 1],
+					pr_err("%s[%d]: Mismatch for register %4x [using relative? %s], default %08x, reference %08x, result (%08x, %08x), poison %08x, context %08x\n",
+					       engine->name, dw, hw[dw],
+					       yesno(is_relative),
+					       hw[dw + 1],
 					       A[0][x], B[0][x], B[1][x],
 					       poison, lrc[dw + 1]);
 					err = -EINVAL;
@@ -1290,7 +1325,8 @@ static int compare_isolation(struct intel_engine_cs *engine,
 	return err;
 }
 
-static int __lrc_isolation(struct intel_engine_cs *engine, u32 poison)
+static int
+__lrc_isolation(struct intel_engine_cs *engine, u32 poison, bool relative)
 {
 	u32 *sema = memset32(engine->status_page.addr + 1000, 0, 1);
 	struct i915_vma *ref[2], *result[2];
@@ -1320,7 +1356,7 @@ static int __lrc_isolation(struct intel_engine_cs *engine, u32 poison)
 		goto err_ref0;
 	}
 
-	rq = record_registers(A, ref[0], ref[1], sema);
+	rq = record_registers(A, ref[0], ref[1], relative, sema);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
 		goto err_ref1;
@@ -1348,13 +1384,13 @@ static int __lrc_isolation(struct intel_engine_cs *engine, u32 poison)
 		goto err_result0;
 	}
 
-	rq = record_registers(A, result[0], result[1], sema);
+	rq = record_registers(A, result[0], result[1], relative, sema);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
 		goto err_result1;
 	}
 
-	err = poison_registers(B, poison, sema);
+	err = poison_registers(B, poison, relative, sema);
 	if (err) {
 		WRITE_ONCE(*sema, -1);
 		i915_request_put(rq);
@@ -1368,7 +1404,7 @@ static int __lrc_isolation(struct intel_engine_cs *engine, u32 poison)
 	}
 	i915_request_put(rq);
 
-	err = compare_isolation(engine, ref, result, A, poison);
+	err = compare_isolation(engine, ref, result, A, poison, relative);
 
 err_result1:
 	i915_vma_put(result[1]);
@@ -1430,13 +1466,23 @@ static int live_lrc_isolation(void *arg)
 		for (i = 0; i < ARRAY_SIZE(poison); i++) {
 			int result;
 
-			result = __lrc_isolation(engine, poison[i]);
+			result = __lrc_isolation(engine, poison[i], false);
 			if (result && !err)
 				err = result;
 
-			result = __lrc_isolation(engine, ~poison[i]);
+			result = __lrc_isolation(engine, ~poison[i], false);
 			if (result && !err)
 				err = result;
+
+			if (intel_engine_has_relative_mmio(engine)) {
+				result = __lrc_isolation(engine, poison[i], true);
+				if (result && !err)
+					err = result;
+
+				result = __lrc_isolation(engine, ~poison[i], true);
+				if (result && !err)
+					err = result;
+			}
 		}
 		intel_engine_pm_put(engine);
 		if (igt_flush_test(gt->i915)) {
-- 
2.20.1

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  reply index

Thread overview: 103+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-01  8:56 [Intel-gfx] [PATCH 01/57] drm/i915/gt: Restrict the GT clock override to just Icelake Chris Wilson
2021-02-01  8:56 ` Chris Wilson [this message]
2021-02-01 14:34   ` [Intel-gfx] [PATCH 02/57] drm/i915/selftests: Exercise relative mmio paths to non-privileged registers Mika Kuoppala
2021-02-01  8:56 ` [Intel-gfx] [PATCH 03/57] drm/i915/selftests: Exercise cross-process context isolation Chris Wilson
2021-02-01 16:37   ` Mika Kuoppala
2021-02-01  8:56 ` [Intel-gfx] [PATCH 04/57] drm/i915: Protect against request freeing during cancellation on wedging Chris Wilson
2021-02-02  9:55   ` Mika Kuoppala
2021-02-01  8:56 ` [Intel-gfx] [PATCH 05/57] drm/i915: Take rcu_read_lock for querying fence's driver/timeline names Chris Wilson
2021-02-02 18:33   ` Mika Kuoppala
2021-02-01  8:56 ` [Intel-gfx] [PATCH 06/57] drm/i915/gt: Always flush the submission queue on checking for idle Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 07/57] drm/i915/gt: Move engine setup out of set_default_submission Chris Wilson
2021-02-02 11:57   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 08/57] drm/i915/gt: Move submission_method into intel_gt Chris Wilson
2021-02-02 12:03   ` Tvrtko Ursulin
2021-02-02 12:18     ` Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 09/57] drm/i915: Replace engine->schedule() with a known request operation Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 10/57] drm/i915: Restructure priority inheritance Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 11/57] drm/i915/selftests: Measure set-priority duration Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 12/57] drm/i915/selftests: Exercise priority inheritance around an engine loop Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 13/57] drm/i915/selftests: Force a rewind if at first we don't succeed Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 14/57] drm/i915: Improve DFS for priority inheritance Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 15/57] drm/i915: Extract request submission from execlists Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 16/57] drm/i915: Extract request rewinding " Chris Wilson
2021-02-02 13:08   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 17/57] drm/i915: Extract request suspension from the execlists Chris Wilson
2021-02-02 13:15   ` Tvrtko Ursulin
2021-02-02 13:26     ` Chris Wilson
2021-02-02 13:32       ` Tvrtko Ursulin
2021-02-02 13:27     ` Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 18/57] drm/i915: Extract the ability to defer and rerun a request later Chris Wilson
2021-02-02 13:18   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 19/57] drm/i915: Fix the iterative dfs for defering requests Chris Wilson
2021-02-02 14:10   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 20/57] drm/i915: Wrap access to intel_engine.active Chris Wilson
2021-02-04 11:07   ` Tvrtko Ursulin
2021-02-04 11:18     ` Chris Wilson
2021-02-04 11:56       ` Chris Wilson
2021-02-04 12:08         ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 21/57] drm/i915: Move common active lists from engine to i915_scheduler Chris Wilson
2021-02-04 11:12   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 22/57] drm/i915: Move scheduler queue Chris Wilson
2021-02-04 11:19   ` Tvrtko Ursulin
2021-02-04 11:32     ` Chris Wilson
2021-02-04 11:40     ` Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 23/57] drm/i915: Move tasklet from execlists to sched Chris Wilson
2021-02-04 14:06   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 24/57] drm/i915/gt: Only kick the scheduler on timeslice/preemption change Chris Wilson
2021-02-04 14:09   ` Tvrtko Ursulin
2021-02-04 14:43     ` Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 25/57] drm/i915: Move submit_request to i915_sched_engine Chris Wilson
2021-02-04 14:13   ` Tvrtko Ursulin
2021-02-04 14:45     ` Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 26/57] drm/i915: Move finding the current active request to the scheduler Chris Wilson
2021-02-04 14:30   ` Tvrtko Ursulin
2021-02-04 14:59     ` Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 27/57] drm/i915: Show execlists queues when dumping state Chris Wilson
2021-02-04 15:04   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 28/57] drm/i915: Wrap i915_request_use_semaphores() Chris Wilson
2021-02-04 15:05   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 29/57] drm/i915: Move scheduler flags Chris Wilson
2021-02-04 15:14   ` Tvrtko Ursulin
2021-02-04 16:05     ` Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 30/57] drm/i915: Move timeslicing flag to scheduler Chris Wilson
2021-02-04 15:18   ` Tvrtko Ursulin
2021-02-04 16:11     ` Chris Wilson
2021-02-05  9:48       ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 31/57] drm/i915/gt: Declare when we enabled timeslicing Chris Wilson
2021-02-04 15:26   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 32/57] drm/i915: Move needs-breadcrumb flags to scheduler Chris Wilson
2021-02-04 15:28   ` Tvrtko Ursulin
2021-02-04 16:12     ` Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 33/57] drm/i915: Move busywaiting control to the scheduler Chris Wilson
2021-02-04 15:32   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 34/57] drm/i915: Move preempt-reset flag " Chris Wilson
2021-02-04 15:34   ` Tvrtko Ursulin
2021-02-01  8:56 ` [Intel-gfx] [PATCH 35/57] drm/i915: Replace priolist rbtree with a skiplist Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 36/57] drm/i915: Wrap cmpxchg64 with try_cmpxchg64() helper Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 37/57] drm/i915: Fair low-latency scheduling Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 38/57] drm/i915/gt: Specify a deadline for the heartbeat Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 39/57] drm/i915: Extend the priority boosting for the display with a deadline Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 40/57] drm/i915/gt: Support virtual engine queues Chris Wilson
2021-02-01  8:56 ` [Intel-gfx] [PATCH 41/57] drm/i915: Move saturated workload detection back to the context Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 42/57] drm/i915: Bump default timeslicing quantum to 5ms Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 43/57] drm/i915/gt: Delay taking irqoff for execlists submission Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 44/57] drm/i915/gt: Wrap intel_timeline.has_initial_breadcrumb Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 45/57] drm/i915/gt: Track timeline GGTT offset separately from subpage offset Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 46/57] drm/i915/gt: Add timeline "mode" Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 47/57] drm/i915/gt: Use indices for writing into relative timelines Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 48/57] drm/i915/selftests: Exercise relative timeline modes Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 49/57] drm/i915/gt: Use ppHWSP for unshared non-semaphore related timelines Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 50/57] Restore "drm/i915: drop engine_pin/unpin_breadcrumbs_irq" Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 51/57] drm/i915/gt: Couple tasklet scheduling for all CS interrupts Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 52/57] drm/i915/gt: Support creation of 'internal' rings Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 53/57] drm/i915/gt: Use client timeline address for seqno writes Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 54/57] drm/i915/gt: Infrastructure for ring scheduling Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 55/57] drm/i915/gt: Implement ring scheduler for gen4-7 Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 56/57] drm/i915/gt: Enable ring scheduling for gen5-7 Chris Wilson
2021-02-01  8:57 ` [Intel-gfx] [PATCH 57/57] drm/i915: Support secure dispatch on gen6/gen7 Chris Wilson
2021-02-01 14:13 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [01/57] drm/i915/gt: Restrict the GT clock override to just Icelake Patchwork
2021-02-01 14:15 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-02-01 14:15 ` [Intel-gfx] [PATCH 01/57] " Mika Kuoppala
2021-02-01 14:41 ` [Intel-gfx] ✓ Fi.CI.BAT: success for series starting with [01/57] " Patchwork
2021-02-01 19:33 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork

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