drm/amdgpu: move buffer funcs setting up a leveldrm-misc-next-2023-10-27

Rather than doing this in the IP code for the SDMA paging
engine, move it up to the core device level init level.
This should fix the scheduler init ordering.

v2: drop extra parens
v3: drop SDMA helpers
v4: Added a Fixes tag because amdgpu dereferences an uninitialized
    scheduler without this patch, and this patch fixes this. (Luben)

Tested-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://lore.kernel.org/r/20231025171928.3318505-1-alexander.deucher@amd.com
Acked-by: Christian König <christian.koenig@amd.com>
Fixes: 56e449603f0ac5 ("drm/sched: Convert the GPU scheduler to variable number of run-queues")
Signed-off-by: Luben Tuikov <ltuikov89@gmail.com>

11 files changed, 19 insertions, 84 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 15074232fbbd..19b539cab7fe 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2450,6 +2450,9 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 	if (r)
 		goto init_failed;
 
+	if (adev->mman.buffer_funcs_ring->sched.ready)
+		amdgpu_ttm_set_buffer_funcs_status(adev, true);
+
 	/* Don't init kfd if whole hive need to be reset during init */
 	if (!adev->gmc.xgmi.pending_reset) {
 		kgd2kfd_init_zone_device(adev);
@@ -3045,6 +3048,8 @@ int amdgpu_device_ip_suspend(struct amdgpu_device *adev)
 		amdgpu_virt_request_full_gpu(adev, false);
 	}
 
+	amdgpu_ttm_set_buffer_funcs_status(adev, false);
+
 	r = amdgpu_device_ip_suspend_phase1(adev);
 	if (r)
 		return r;
@@ -3234,6 +3239,9 @@ static int amdgpu_device_ip_resume(struct amdgpu_device *adev)
 
 	r = amdgpu_device_ip_resume_phase2(adev);
 
+	if (adev->mman.buffer_funcs_ring->sched.ready)
+		amdgpu_ttm_set_buffer_funcs_status(adev, true);
+
 	return r;
 }
 
@@ -4008,6 +4016,8 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
 	/* disable ras feature must before hw fini */
 	amdgpu_ras_pre_fini(adev);
 
+	amdgpu_ttm_set_buffer_funcs_status(adev, false);
+
 	amdgpu_device_ip_fini_early(adev);
 
 	amdgpu_irq_fini_hw(adev);
@@ -4146,6 +4156,8 @@ int amdgpu_device_suspend(struct drm_device *dev, bool fbcon)
 
 	amdgpu_ras_suspend(adev);
 
+	amdgpu_ttm_set_buffer_funcs_status(adev, false);
+
 	amdgpu_device_ip_suspend_phase1(adev);
 
 	if (!adev->in_s0ix)
@@ -4971,6 +4983,9 @@ int amdgpu_do_asic_reset(struct list_head *device_list_handle,
 				if (r)
 					goto out;
 
+				if (tmp_adev->mman.buffer_funcs_ring->sched.ready)
+					amdgpu_ttm_set_buffer_funcs_status(tmp_adev, true);
+
 				if (vram_lost)
 					amdgpu_device_fill_reset_magic(tmp_adev);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
index e2b9392d7f0d..12c3e8a6eb0e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
@@ -289,27 +289,6 @@ out:
 	return err;
 }
 
-void amdgpu_sdma_unset_buffer_funcs_helper(struct amdgpu_device *adev)
-{
-	struct amdgpu_ring *sdma;
-	int i;
-
-	for (i = 0; i < adev->sdma.num_instances; i++) {
-		if (adev->sdma.has_page_queue) {
-			sdma = &adev->sdma.instance[i].page;
-			if (adev->mman.buffer_funcs_ring == sdma) {
-				amdgpu_ttm_set_buffer_funcs_status(adev, false);
-				break;
-			}
-		}
-		sdma = &adev->sdma.instance[i].ring;
-		if (adev->mman.buffer_funcs_ring == sdma) {
-			amdgpu_ttm_set_buffer_funcs_status(adev, false);
-			break;
-		}
-	}
-}
-
 int amdgpu_sdma_ras_sw_init(struct amdgpu_device *adev)
 {
 	int err = 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
index 513ac22120c1..173a2a308078 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
@@ -169,7 +169,6 @@ int amdgpu_sdma_init_microcode(struct amdgpu_device *adev, u32 instance,
 			       bool duplicate);
 void amdgpu_sdma_destroy_inst_ctx(struct amdgpu_device *adev,
         bool duplicate);
-void amdgpu_sdma_unset_buffer_funcs_helper(struct amdgpu_device *adev);
 int amdgpu_sdma_ras_sw_init(struct amdgpu_device *adev);
 
 #endif
diff --git a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
index 52598fbc9b39..6def8691e444 100644
--- a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
@@ -308,8 +308,6 @@ static void cik_sdma_gfx_stop(struct amdgpu_device *adev)
 	u32 rb_cntl;
 	int i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i]);
 		rb_cntl &= ~SDMA0_GFX_RB_CNTL__RB_ENABLE_MASK;
@@ -498,9 +496,6 @@ static int cik_sdma_gfx_resume(struct amdgpu_device *adev)
 		r = amdgpu_ring_test_helper(ring);
 		if (r)
 			return r;
-
-		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
index 51afc92994a8..e3f5af4762d0 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
@@ -339,8 +339,6 @@ static void sdma_v2_4_gfx_stop(struct amdgpu_device *adev)
 	u32 rb_cntl, ib_cntl;
 	int i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i]);
 		rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 0);
@@ -474,9 +472,6 @@ static int sdma_v2_4_gfx_resume(struct amdgpu_device *adev)
 		r = amdgpu_ring_test_helper(ring);
 		if (r)
 			return r;
-
-		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index 344202870aeb..94dcce3c73b2 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -513,8 +513,6 @@ static void sdma_v3_0_gfx_stop(struct amdgpu_device *adev)
 	u32 rb_cntl, ib_cntl;
 	int i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i]);
 		rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 0);
@@ -746,9 +744,6 @@ static int sdma_v3_0_gfx_resume(struct amdgpu_device *adev)
 		r = amdgpu_ring_test_helper(ring);
 		if (r)
 			return r;
-
-		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index cd37f45e01a1..d7e8c21f2a5d 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -875,8 +875,6 @@ static void sdma_v4_0_gfx_enable(struct amdgpu_device *adev, bool enable)
 	u32 rb_cntl, ib_cntl;
 	int i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32_SDMA(i, mmSDMA0_GFX_RB_CNTL);
 		rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, enable ? 1 : 0);
@@ -911,8 +909,6 @@ static void sdma_v4_0_page_stop(struct amdgpu_device *adev)
 	u32 rb_cntl, ib_cntl;
 	int i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32_SDMA(i, mmSDMA0_PAGE_RB_CNTL);
 		rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_PAGE_RB_CNTL,
@@ -1399,13 +1395,7 @@ static int sdma_v4_0_start(struct amdgpu_device *adev)
 			r = amdgpu_ring_test_helper(page);
 			if (r)
 				return r;
-
-			if (adev->mman.buffer_funcs_ring == page)
-				amdgpu_ttm_set_buffer_funcs_status(adev, true);
 		}
-
-		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return r;
@@ -1917,11 +1907,8 @@ static int sdma_v4_0_hw_fini(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	int i;
 
-	if (amdgpu_sriov_vf(adev)) {
-		/* disable the scheduler for SDMA */
-		amdgpu_sdma_unset_buffer_funcs_helper(adev);
+	if (amdgpu_sriov_vf(adev))
 		return 0;
-	}
 
 	if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__SDMA)) {
 		for (i = 0; i < adev->sdma.num_instances; i++) {
@@ -1960,7 +1947,6 @@ static int sdma_v4_0_resume(void *handle)
 	if (adev->in_s0ix) {
 		sdma_v4_0_enable(adev, true);
 		sdma_v4_0_gfx_enable(adev, true);
-		amdgpu_ttm_set_buffer_funcs_status(adev, true);
 		return 0;
 	}
 
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
index 1cc34efb455b..7d7b86048e68 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
@@ -559,8 +559,6 @@ static void sdma_v5_0_gfx_stop(struct amdgpu_device *adev)
 	u32 rb_cntl, ib_cntl;
 	int i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32_SOC15_IP(GC, sdma_v5_0_get_reg_offset(adev, i, mmSDMA0_GFX_RB_CNTL));
 		rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 0);
@@ -825,9 +823,6 @@ static int sdma_v5_0_gfx_resume(struct amdgpu_device *adev)
 		r = amdgpu_ring_test_helper(ring);
 		if (r)
 			return r;
-
-		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;
@@ -1427,11 +1422,8 @@ static int sdma_v5_0_hw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	if (amdgpu_sriov_vf(adev)) {
-		/* disable the scheduler for SDMA */
-		amdgpu_sdma_unset_buffer_funcs_helper(adev);
+	if (amdgpu_sriov_vf(adev))
 		return 0;
-	}
 
 	sdma_v5_0_ctx_switch_enable(adev, false);
 	sdma_v5_0_enable(adev, false);
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
index 2b3ebebc4299..e53f4adfdc13 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
@@ -364,8 +364,6 @@ static void sdma_v5_2_gfx_stop(struct amdgpu_device *adev)
 	u32 rb_cntl, ib_cntl;
 	int i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_CNTL));
 		rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 0);
@@ -625,9 +623,6 @@ static int sdma_v5_2_gfx_resume(struct amdgpu_device *adev)
 		r = amdgpu_ring_test_helper(ring);
 		if (r)
 			return r;
-
-		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;
@@ -1285,11 +1280,8 @@ static int sdma_v5_2_hw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	if (amdgpu_sriov_vf(adev)) {
-		/* disable the scheduler for SDMA */
-		amdgpu_sdma_unset_buffer_funcs_helper(adev);
+	if (amdgpu_sriov_vf(adev))
 		return 0;
-	}
 
 	sdma_v5_2_ctx_switch_enable(adev, false);
 	sdma_v5_2_enable(adev, false);
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
index 45be0af2570b..c35bc0f0c1dd 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
@@ -381,8 +381,6 @@ static void sdma_v6_0_gfx_stop(struct amdgpu_device *adev)
 	u32 rb_cntl, ib_cntl;
 	int i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32_SOC15_IP(GC, sdma_v6_0_get_reg_offset(adev, i, regSDMA0_QUEUE0_RB_CNTL));
 		rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, RB_ENABLE, 0);
@@ -594,9 +592,6 @@ static int sdma_v6_0_gfx_resume(struct amdgpu_device *adev)
 		r = amdgpu_ring_test_helper(ring);
 		if (r)
 			return r;
-
-		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;
@@ -1343,11 +1338,8 @@ static int sdma_v6_0_hw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	if (amdgpu_sriov_vf(adev)) {
-		/* disable the scheduler for SDMA */
-		amdgpu_sdma_unset_buffer_funcs_helper(adev);
+	if (amdgpu_sriov_vf(adev))
 		return 0;
-	}
 
 	sdma_v6_0_ctxempty_int_enable(adev, false);
 	sdma_v6_0_enable(adev, false);
diff --git a/drivers/gpu/drm/amd/amdgpu/si_dma.c b/drivers/gpu/drm/amd/amdgpu/si_dma.c
index 42c4547f32ec..9aa0e11ee673 100644
--- a/drivers/gpu/drm/amd/amdgpu/si_dma.c
+++ b/drivers/gpu/drm/amd/amdgpu/si_dma.c
@@ -115,8 +115,6 @@ static void si_dma_stop(struct amdgpu_device *adev)
 	u32 rb_cntl;
 	unsigned i;
 
-	amdgpu_sdma_unset_buffer_funcs_helper(adev);
-
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		/* dma0 */
 		rb_cntl = RREG32(DMA_RB_CNTL + sdma_offsets[i]);
@@ -177,9 +175,6 @@ static int si_dma_start(struct amdgpu_device *adev)
 		r = amdgpu_ring_test_helper(ring);
 		if (r)
 			return r;
-
-		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;