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From:   Arvind Yadav <Arvind.Yadav@amd.com>
To:     <Christian.Koenig@amd.com>, <andrey.grodzovsky@amd.com>,
        <shashank.sharma@amd.com>, <amaranath.somalapuram@amd.com>,
        <Arunpravin.PaneerSelvam@amd.com>, <sumit.semwal@linaro.org>,
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        <linux-media@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
        <linaro-mm-sig@lists.linaro.org>, <linux-kernel@vger.kernel.org>
CC:     Arvind Yadav <Arvind.Yadav@amd.com>
Subject: [PATCH v3 3/6] dma-buf: Enable signaling on fence for selftests
Date:   Fri, 9 Sep 2022 22:38:42 +0530
Message-ID: <20220909170845.4946-4-Arvind.Yadav@amd.com>
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Here's enabling software signaling on fence for selftest.

Signed-off-by: Arvind Yadav <Arvind.Yadav@amd.com>
---

Changes in v1 :
1- Addressing Christian's comment to remove unnecessary callback.
2- Replacing CONFIG_DEBUG_WW_MUTEX_SLOWPATH instead of CONFIG_DEBUG_FS.
3- The version of this patch is also changed and previously
it was [PATCH 4/4]

Changes in v2 :
1- #ifdef CONFIG_DEBUG_WW_MUTEX_SLOWPATH removed

---
 drivers/dma-buf/st-dma-fence-chain.c  |  4 ++++
 drivers/dma-buf/st-dma-fence-unwrap.c | 22 ++++++++++++++++++++++
 drivers/dma-buf/st-dma-fence.c        | 16 ++++++++++++++++
 drivers/dma-buf/st-dma-resv.c         | 10 ++++++++++
 4 files changed, 52 insertions(+)

diff --git a/drivers/dma-buf/st-dma-fence-chain.c b/drivers/dma-buf/st-dma-fence-chain.c
index 8ce1ea59d31b..0a9b099d0518 100644
--- a/drivers/dma-buf/st-dma-fence-chain.c
+++ b/drivers/dma-buf/st-dma-fence-chain.c
@@ -87,6 +87,8 @@ static int sanitycheck(void *arg)
 	if (!chain)
 		err = -ENOMEM;
 
+	dma_fence_enable_sw_signaling(chain);
+
 	dma_fence_signal(f);
 	dma_fence_put(f);
 
@@ -143,6 +145,8 @@ static int fence_chains_init(struct fence_chains *fc, unsigned int count,
 		}
 
 		fc->tail = fc->chains[i];
+
+		dma_fence_enable_sw_signaling(fc->chains[i]);
 	}
 
 	fc->chain_length = i;
diff --git a/drivers/dma-buf/st-dma-fence-unwrap.c b/drivers/dma-buf/st-dma-fence-unwrap.c
index 4105d5ea8dde..f0cee984b6c7 100644
--- a/drivers/dma-buf/st-dma-fence-unwrap.c
+++ b/drivers/dma-buf/st-dma-fence-unwrap.c
@@ -102,6 +102,8 @@ static int sanitycheck(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	array = mock_array(1, f);
 	if (!array)
 		return -ENOMEM;
@@ -124,12 +126,16 @@ static int unwrap_array(void *arg)
 	if (!f1)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f1);
+
 	f2 = mock_fence();
 	if (!f2) {
 		dma_fence_put(f1);
 		return -ENOMEM;
 	}
 
+	dma_fence_enable_sw_signaling(f2);
+
 	array = mock_array(2, f1, f2);
 	if (!array)
 		return -ENOMEM;
@@ -164,12 +170,16 @@ static int unwrap_chain(void *arg)
 	if (!f1)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f1);
+
 	f2 = mock_fence();
 	if (!f2) {
 		dma_fence_put(f1);
 		return -ENOMEM;
 	}
 
+	dma_fence_enable_sw_signaling(f2);
+
 	chain = mock_chain(f1, f2);
 	if (!chain)
 		return -ENOMEM;
@@ -204,12 +214,16 @@ static int unwrap_chain_array(void *arg)
 	if (!f1)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f1);
+
 	f2 = mock_fence();
 	if (!f2) {
 		dma_fence_put(f1);
 		return -ENOMEM;
 	}
 
+	dma_fence_enable_sw_signaling(f2);
+
 	array = mock_array(2, f1, f2);
 	if (!array)
 		return -ENOMEM;
@@ -248,12 +262,16 @@ static int unwrap_merge(void *arg)
 	if (!f1)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f1);
+
 	f2 = mock_fence();
 	if (!f2) {
 		err = -ENOMEM;
 		goto error_put_f1;
 	}
 
+	dma_fence_enable_sw_signaling(f2);
+
 	f3 = dma_fence_unwrap_merge(f1, f2);
 	if (!f3) {
 		err = -ENOMEM;
@@ -296,10 +314,14 @@ static int unwrap_merge_complex(void *arg)
 	if (!f1)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f1);
+
 	f2 = mock_fence();
 	if (!f2)
 		goto error_put_f1;
 
+	dma_fence_enable_sw_signaling(f2);
+
 	f3 = dma_fence_unwrap_merge(f1, f2);
 	if (!f3)
 		goto error_put_f2;
diff --git a/drivers/dma-buf/st-dma-fence.c b/drivers/dma-buf/st-dma-fence.c
index c8a12d7ad71a..fb6e0a6ae2c9 100644
--- a/drivers/dma-buf/st-dma-fence.c
+++ b/drivers/dma-buf/st-dma-fence.c
@@ -102,6 +102,8 @@ static int sanitycheck(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	dma_fence_signal(f);
 	dma_fence_put(f);
 
@@ -117,6 +119,8 @@ static int test_signaling(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	if (dma_fence_is_signaled(f)) {
 		pr_err("Fence unexpectedly signaled on creation\n");
 		goto err_free;
@@ -190,6 +194,8 @@ static int test_late_add_callback(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	dma_fence_signal(f);
 
 	if (!dma_fence_add_callback(f, &cb.cb, simple_callback)) {
@@ -282,6 +288,8 @@ static int test_status(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	if (dma_fence_get_status(f)) {
 		pr_err("Fence unexpectedly has signaled status on creation\n");
 		goto err_free;
@@ -308,6 +316,8 @@ static int test_error(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	dma_fence_set_error(f, -EIO);
 
 	if (dma_fence_get_status(f)) {
@@ -337,6 +347,8 @@ static int test_wait(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	if (dma_fence_wait_timeout(f, false, 0) != -ETIME) {
 		pr_err("Wait reported complete before being signaled\n");
 		goto err_free;
@@ -379,6 +391,8 @@ static int test_wait_timeout(void *arg)
 	if (!wt.f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(wt.f);
+
 	if (dma_fence_wait_timeout(wt.f, false, 1) != -ETIME) {
 		pr_err("Wait reported complete before being signaled\n");
 		goto err_free;
@@ -458,6 +472,8 @@ static int thread_signal_callback(void *arg)
 			break;
 		}
 
+		dma_fence_enable_sw_signaling(f1);
+
 		rcu_assign_pointer(t->fences[t->id], f1);
 		smp_wmb();
 
diff --git a/drivers/dma-buf/st-dma-resv.c b/drivers/dma-buf/st-dma-resv.c
index 813779e3c9be..15dbea1462ed 100644
--- a/drivers/dma-buf/st-dma-resv.c
+++ b/drivers/dma-buf/st-dma-resv.c
@@ -45,6 +45,8 @@ static int sanitycheck(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	dma_fence_signal(f);
 	dma_fence_put(f);
 
@@ -69,6 +71,8 @@ static int test_signaling(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	dma_resv_init(&resv);
 	r = dma_resv_lock(&resv, NULL);
 	if (r) {
@@ -114,6 +118,8 @@ static int test_for_each(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	dma_resv_init(&resv);
 	r = dma_resv_lock(&resv, NULL);
 	if (r) {
@@ -173,6 +179,8 @@ static int test_for_each_unlocked(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	dma_resv_init(&resv);
 	r = dma_resv_lock(&resv, NULL);
 	if (r) {
@@ -244,6 +252,8 @@ static int test_get_fences(void *arg)
 	if (!f)
 		return -ENOMEM;
 
+	dma_fence_enable_sw_signaling(f);
+
 	dma_resv_init(&resv);
 	r = dma_resv_lock(&resv, NULL);
 	if (r) {
-- 
2.25.1