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Message-ID: <20251030091118.4864-1-pierre-eric.pelloux-prayer@amd.com>
Date: Thu, 30 Oct 2025 10:11:11 +0100
From: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
To: Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>, David Airlie
<airlied@...il.com>, Simona Vetter <simona@...ll.ch>
CC: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
<amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH v2 1/3] drm/amdgpu: add engine_retains_context to amdgpu_ring_funcs
If true, the hw engine retains context among dependent jobs, which means
load balancing between schedulers cannot be used at the job level.
amdgpu_ctx_init_entity uses this information to disable load balancing,
but it's best to store it as a property rather than deduce it based on
hw_ip.
Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 +
drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c | 1 +
drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c | 1 +
drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c | 3 +++
drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c | 2 ++
drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c | 2 ++
drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c | 2 ++
drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c | 2 ++
drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c | 3 +++
drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c | 1 +
drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c | 1 +
drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c | 1 +
15 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index 4b46e3c26ff3..a10efac2fc54 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
@@ -211,6 +211,7 @@ struct amdgpu_ring_funcs {
bool support_64bit_ptrs;
bool no_user_fence;
bool secure_submission_supported;
+ bool engine_retains_context;
/**
* @extra_bytes:
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c b/drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c
index 2e79a3afc774..4a85b5465bb2 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c
@@ -181,6 +181,7 @@ static const struct amdgpu_ring_funcs uvd_v3_1_ring_funcs = {
.align_mask = 0xf,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .engine_retains_context = true,
.get_rptr = uvd_v3_1_ring_get_rptr,
.get_wptr = uvd_v3_1_ring_get_wptr,
.set_wptr = uvd_v3_1_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c b/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
index 4b96fd583772..e7c1d12f0596 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v4_2.c
@@ -775,6 +775,7 @@ static const struct amdgpu_ring_funcs uvd_v4_2_ring_funcs = {
.align_mask = 0xf,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .engine_retains_context = true,
.get_rptr = uvd_v4_2_ring_get_rptr,
.get_wptr = uvd_v4_2_ring_get_wptr,
.set_wptr = uvd_v4_2_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
index 71409ad8b7ed..a62788e4af96 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c
@@ -882,6 +882,7 @@ static const struct amdgpu_ring_funcs uvd_v5_0_ring_funcs = {
.align_mask = 0xf,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .engine_retains_context = true,
.get_rptr = uvd_v5_0_ring_get_rptr,
.get_wptr = uvd_v5_0_ring_get_wptr,
.set_wptr = uvd_v5_0_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
index ceb94bbb03a4..0435577b9b3b 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
@@ -1552,6 +1552,7 @@ static const struct amdgpu_ring_funcs uvd_v6_0_ring_phys_funcs = {
.align_mask = 0xf,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .engine_retains_context = true,
.get_rptr = uvd_v6_0_ring_get_rptr,
.get_wptr = uvd_v6_0_ring_get_wptr,
.set_wptr = uvd_v6_0_ring_set_wptr,
@@ -1578,6 +1579,7 @@ static const struct amdgpu_ring_funcs uvd_v6_0_ring_vm_funcs = {
.align_mask = 0xf,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .engine_retains_context = true,
.get_rptr = uvd_v6_0_ring_get_rptr,
.get_wptr = uvd_v6_0_ring_get_wptr,
.set_wptr = uvd_v6_0_ring_set_wptr,
@@ -1607,6 +1609,7 @@ static const struct amdgpu_ring_funcs uvd_v6_0_enc_ring_vm_funcs = {
.nop = HEVC_ENC_CMD_NO_OP,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .engine_retains_context = true,
.get_rptr = uvd_v6_0_enc_ring_get_rptr,
.get_wptr = uvd_v6_0_enc_ring_get_wptr,
.set_wptr = uvd_v6_0_enc_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
index 1f8866f3f63c..3720d72f2c3e 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
@@ -1539,6 +1539,7 @@ static const struct amdgpu_ring_funcs uvd_v7_0_ring_vm_funcs = {
.align_mask = 0xf,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .engine_retains_context = true,
.get_rptr = uvd_v7_0_ring_get_rptr,
.get_wptr = uvd_v7_0_ring_get_wptr,
.set_wptr = uvd_v7_0_ring_set_wptr,
@@ -1571,6 +1572,7 @@ static const struct amdgpu_ring_funcs uvd_v7_0_enc_ring_vm_funcs = {
.nop = HEVC_ENC_CMD_NO_OP,
.support_64bit_ptrs = false,
.no_user_fence = true,
+ .engine_retains_context = true,
.get_rptr = uvd_v7_0_enc_ring_get_rptr,
.get_wptr = uvd_v7_0_enc_ring_get_wptr,
.set_wptr = uvd_v7_0_enc_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
index a316797875a8..1691d0f955a9 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
@@ -2117,6 +2117,7 @@ static const struct amdgpu_ring_funcs vcn_v1_0_dec_ring_vm_funcs = {
.support_64bit_ptrs = false,
.no_user_fence = true,
.secure_submission_supported = true,
+ .engine_retains_context = true,
.get_rptr = vcn_v1_0_dec_ring_get_rptr,
.get_wptr = vcn_v1_0_dec_ring_get_wptr,
.set_wptr = vcn_v1_0_dec_ring_set_wptr,
@@ -2150,6 +2151,7 @@ static const struct amdgpu_ring_funcs vcn_v1_0_enc_ring_vm_funcs = {
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
.support_64bit_ptrs = false,
+ .engine_retains_context = true,
.no_user_fence = true,
.get_rptr = vcn_v1_0_enc_ring_get_rptr,
.get_wptr = vcn_v1_0_enc_ring_get_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
index 8897dcc9c1a0..046dd6b216e9 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
@@ -2113,6 +2113,7 @@ static const struct amdgpu_ring_funcs vcn_v2_0_dec_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_DEC,
.align_mask = 0xf,
.secure_submission_supported = true,
+ .engine_retains_context = true,
.get_rptr = vcn_v2_0_dec_ring_get_rptr,
.get_wptr = vcn_v2_0_dec_ring_get_wptr,
.set_wptr = vcn_v2_0_dec_ring_set_wptr,
@@ -2144,6 +2145,7 @@ static const struct amdgpu_ring_funcs vcn_v2_0_enc_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
+ .engine_retains_context = true,
.get_rptr = vcn_v2_0_enc_ring_get_rptr,
.get_wptr = vcn_v2_0_enc_ring_get_wptr,
.set_wptr = vcn_v2_0_enc_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
index cebee453871c..063f88da120b 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
@@ -1777,6 +1777,7 @@ static const struct amdgpu_ring_funcs vcn_v2_5_dec_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_DEC,
.align_mask = 0xf,
.secure_submission_supported = true,
+ .engine_retains_context = true,
.get_rptr = vcn_v2_5_dec_ring_get_rptr,
.get_wptr = vcn_v2_5_dec_ring_get_wptr,
.set_wptr = vcn_v2_5_dec_ring_set_wptr,
@@ -1877,6 +1878,7 @@ static const struct amdgpu_ring_funcs vcn_v2_5_enc_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
+ .engine_retains_context = true,
.get_rptr = vcn_v2_5_enc_ring_get_rptr,
.get_wptr = vcn_v2_5_enc_ring_get_wptr,
.set_wptr = vcn_v2_5_enc_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
index d9cf8f0feeb3..8dcc07b3f631 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
@@ -1857,6 +1857,7 @@ static const struct amdgpu_ring_funcs vcn_v3_0_dec_sw_ring_vm_funcs = {
.align_mask = 0x3f,
.nop = VCN_DEC_SW_CMD_NO_OP,
.secure_submission_supported = true,
+ .engine_retains_context = true,
.get_rptr = vcn_v3_0_dec_ring_get_rptr,
.get_wptr = vcn_v3_0_dec_ring_get_wptr,
.set_wptr = vcn_v3_0_dec_ring_set_wptr,
@@ -2021,6 +2022,7 @@ static const struct amdgpu_ring_funcs vcn_v3_0_dec_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_DEC,
.align_mask = 0xf,
.secure_submission_supported = true,
+ .engine_retains_context = true,
.get_rptr = vcn_v3_0_dec_ring_get_rptr,
.get_wptr = vcn_v3_0_dec_ring_get_wptr,
.set_wptr = vcn_v3_0_dec_ring_set_wptr,
@@ -2122,6 +2124,7 @@ static const struct amdgpu_ring_funcs vcn_v3_0_enc_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
+ .engine_retains_context = true,
.get_rptr = vcn_v3_0_enc_ring_get_rptr,
.get_wptr = vcn_v3_0_enc_ring_get_wptr,
.set_wptr = vcn_v3_0_enc_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c
index 3ae666522d57..f1306316dc3c 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c
@@ -1977,6 +1977,7 @@ static struct amdgpu_ring_funcs vcn_v4_0_unified_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
+ .engine_retains_context = true,
.extra_bytes = sizeof(struct amdgpu_vcn_rb_metadata),
.get_rptr = vcn_v4_0_unified_ring_get_rptr,
.get_wptr = vcn_v4_0_unified_ring_get_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
index eacf4e93ba2f..5a935c07352a 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c
@@ -1628,6 +1628,7 @@ static const struct amdgpu_ring_funcs vcn_v4_0_3_unified_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
+ .engine_retains_context = true,
.get_rptr = vcn_v4_0_3_unified_ring_get_rptr,
.get_wptr = vcn_v4_0_3_unified_ring_get_wptr,
.set_wptr = vcn_v4_0_3_unified_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c
index b107ee80e472..1a485f5825dd 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c
@@ -1481,6 +1481,7 @@ static struct amdgpu_ring_funcs vcn_v4_0_5_unified_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
+ .engine_retains_context = true,
.get_rptr = vcn_v4_0_5_unified_ring_get_rptr,
.get_wptr = vcn_v4_0_5_unified_ring_get_wptr,
.set_wptr = vcn_v4_0_5_unified_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c
index 0202df5db1e1..2d8214f591f1 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_0.c
@@ -1203,6 +1203,7 @@ static const struct amdgpu_ring_funcs vcn_v5_0_0_unified_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
+ .engine_retains_context = true,
.get_rptr = vcn_v5_0_0_unified_ring_get_rptr,
.get_wptr = vcn_v5_0_0_unified_ring_get_wptr,
.set_wptr = vcn_v5_0_0_unified_ring_set_wptr,
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c b/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c
index 714350cabf2f..bd3a04f1414d 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c
@@ -1328,6 +1328,7 @@ static const struct amdgpu_ring_funcs vcn_v5_0_1_unified_ring_vm_funcs = {
.type = AMDGPU_RING_TYPE_VCN_ENC,
.align_mask = 0x3f,
.nop = VCN_ENC_CMD_NO_OP,
+ .engine_retains_context = true,
.get_rptr = vcn_v5_0_1_unified_ring_get_rptr,
.get_wptr = vcn_v5_0_1_unified_ring_get_wptr,
.set_wptr = vcn_v5_0_1_unified_ring_set_wptr,
--
2.43.0
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