From: "Timur Kristóf" <timur.kristof@gmail.com>
To: amd-gfx@lists.freedesktop.org, "Marek Olšák" <maraeo@gmail.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"Tvrtko Ursulin" <tursulin@ursulin.net>,
pierre-eric.pelloux-prayer@amd.com,
"Natalie Vock" <nat@pixelcluster.dev>,
"Lijo Lazar" <lijo.lazar@amd.com>,
"Felix Kuehling" <Felix.Kuehling@amd.com>
Cc: "Timur Kristóf" <timur.kristof@gmail.com>
Subject: [PATCH 2/9] drm/amdgpu/sdma: Remove superfluous rlc_resume and rlc_stop functions
Date: Tue, 8 Sep 2026 20:10:45 +0200 [thread overview]
Message-ID: <20260908181052.381126-3-timur.kristof@gmail.com> (raw)
In-Reply-To: <20260908181052.381126-1-timur.kristof@gmail.com>
Every SDMA generation has an rlc_resume and rlc_stop function
which are not doing anything.
Starting from CIK, the SDMA engine supports additional queues
which are called "SDMA compute" or "RLC" queues, and these
queues are used by the KFD, and configured using the HWS.
There is nothing for the kernel driver to do for these.
Let's delete the functions that don't do anything.
In case of SDMA v4.0 and v4.4.2 let's move the init_pg()
call to the start() function.
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
drivers/gpu/drm/amd/amdgpu/cik_sdma.c | 30 --------------------
drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c | 30 --------------------
drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 30 --------------------
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 32 +--------------------
drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c | 36 +-----------------------
drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c | 27 ------------------
drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c | 27 ------------------
drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c | 27 ------------------
drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c | 27 ------------------
9 files changed, 2 insertions(+), 264 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
index 511c9dd3778d..f444207fa550 100644
--- a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
@@ -316,18 +316,6 @@ static void cik_sdma_gfx_stop(struct amdgpu_device *adev)
}
}
-/**
- * cik_sdma_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Stop the compute async dma queues (CIK).
- */
-static void cik_sdma_rlc_stop(struct amdgpu_device *adev)
-{
- /* XXX todo */
-}
-
/**
* cik_ctx_switch_enable - stop the async dma engines context switch
*
@@ -400,7 +388,6 @@ static void cik_sdma_enable(struct amdgpu_device *adev, bool enable)
if (!enable) {
cik_sdma_gfx_stop(adev);
- cik_sdma_rlc_stop(adev);
}
for (i = 0; i < adev->sdma.num_instances; i++) {
@@ -501,20 +488,6 @@ static int cik_sdma_gfx_resume(struct amdgpu_device *adev)
return 0;
}
-/**
- * cik_sdma_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Set up the compute DMA queues and enable them (CIK).
- * Returns 0 for success, error for failure.
- */
-static int cik_sdma_rlc_resume(struct amdgpu_device *adev)
-{
- /* XXX todo */
- return 0;
-}
-
/**
* cik_sdma_load_microcode - load the sDMA ME ucode
*
@@ -577,9 +550,6 @@ static int cik_sdma_start(struct amdgpu_device *adev)
/* start the gfx rings and rlc compute queues */
r = cik_sdma_gfx_resume(adev);
- if (r)
- return r;
- r = cik_sdma_rlc_resume(adev);
if (r)
return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
index 657ef6c93c61..7c8acdf73d44 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
@@ -349,18 +349,6 @@ static void sdma_v2_4_gfx_stop(struct amdgpu_device *adev)
}
}
-/**
- * sdma_v2_4_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Stop the compute async dma queues (VI).
- */
-static void sdma_v2_4_rlc_stop(struct amdgpu_device *adev)
-{
- /* XXX todo */
-}
-
/**
* sdma_v2_4_enable - stop the async dma engines
*
@@ -376,7 +364,6 @@ static void sdma_v2_4_enable(struct amdgpu_device *adev, bool enable)
if (!enable) {
sdma_v2_4_gfx_stop(adev);
- sdma_v2_4_rlc_stop(adev);
}
for (i = 0; i < adev->sdma.num_instances; i++) {
@@ -477,20 +464,6 @@ static int sdma_v2_4_gfx_resume(struct amdgpu_device *adev)
return 0;
}
-/**
- * sdma_v2_4_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Set up the compute DMA queues and enable them (VI).
- * Returns 0 for success, error for failure.
- */
-static int sdma_v2_4_rlc_resume(struct amdgpu_device *adev)
-{
- /* XXX todo */
- return 0;
-}
-
/**
* sdma_v2_4_start - setup and start the async dma engines
@@ -509,9 +482,6 @@ static int sdma_v2_4_start(struct amdgpu_device *adev)
/* start the gfx rings and rlc compute queues */
r = sdma_v2_4_gfx_resume(adev);
- if (r)
- return r;
- r = sdma_v2_4_rlc_resume(adev);
if (r)
return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index 63c94fe52b3c..e929d62721b3 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -526,18 +526,6 @@ static void sdma_v3_0_gfx_stop(struct amdgpu_device *adev)
}
}
-/**
- * sdma_v3_0_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Stop the compute async dma queues (VI).
- */
-static void sdma_v3_0_rlc_stop(struct amdgpu_device *adev)
-{
- /* XXX todo */
-}
-
/**
* sdma_v3_0_ctx_switch_enable - stop the async dma engines context switch
*
@@ -614,7 +602,6 @@ static void sdma_v3_0_enable(struct amdgpu_device *adev, bool enable)
if (!enable) {
sdma_v3_0_gfx_stop(adev);
- sdma_v3_0_rlc_stop(adev);
}
for (i = 0; i < adev->sdma.num_instances; i++) {
@@ -752,20 +739,6 @@ static int sdma_v3_0_gfx_resume(struct amdgpu_device *adev)
return 0;
}
-/**
- * sdma_v3_0_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Set up the compute DMA queues and enable them (VI).
- * Returns 0 for success, error for failure.
- */
-static int sdma_v3_0_rlc_resume(struct amdgpu_device *adev)
-{
- /* XXX todo */
- return 0;
-}
-
/**
* sdma_v3_0_start - setup and start the async dma engines
*
@@ -784,9 +757,6 @@ static int sdma_v3_0_start(struct amdgpu_device *adev)
/* start the gfx rings and rlc compute queues */
r = sdma_v3_0_gfx_resume(adev);
- if (r)
- return r;
- r = sdma_v3_0_rlc_resume(adev);
if (r)
return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index ded1f8abfb08..bdd140887e10 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -933,18 +933,6 @@ static void sdma_v4_0_gfx_enable(struct amdgpu_device *adev, bool enable)
}
}
-/**
- * sdma_v4_0_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Stop the compute async dma queues (VEGA10).
- */
-static void sdma_v4_0_rlc_stop(struct amdgpu_device *adev)
-{
- /* XXX todo */
-}
-
/**
* sdma_v4_0_page_stop - stop the page async dma engines
*
@@ -1047,7 +1035,6 @@ static void sdma_v4_0_enable(struct amdgpu_device *adev, bool enable)
if (!enable) {
sdma_v4_0_gfx_enable(adev, enable);
- sdma_v4_0_rlc_stop(adev);
if (adev->sdma.has_page_queue)
sdma_v4_0_page_stop(adev);
}
@@ -1312,21 +1299,6 @@ static void sdma_v4_0_init_pg(struct amdgpu_device *adev)
}
}
-/**
- * sdma_v4_0_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Set up the compute DMA queues and enable them (VEGA10).
- * Returns 0 for success, error for failure.
- */
-static int sdma_v4_0_rlc_resume(struct amdgpu_device *adev)
-{
- sdma_v4_0_init_pg(adev);
-
- return 0;
-}
-
/**
* sdma_v4_0_load_microcode - load the sDMA ME ucode
*
@@ -1426,9 +1398,7 @@ static int sdma_v4_0_start(struct amdgpu_device *adev)
sdma_v4_0_ctx_switch_enable(adev, true);
sdma_v4_0_enable(adev, true);
} else {
- r = sdma_v4_0_rlc_resume(adev);
- if (r)
- return r;
+ sdma_v4_0_init_pg(adev);
}
for (i = 0; i < adev->sdma.num_instances; i++) {
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c
index 5212ea6c46a2..7e8d528cf422 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c
@@ -520,20 +520,6 @@ static void sdma_v4_4_2_inst_gfx_stop(struct amdgpu_device *adev,
}
}
-/**
- * sdma_v4_4_2_inst_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- * @inst_mask: mask of dma engine instances to be disabled
- *
- * Stop the compute async dma queues.
- */
-static void sdma_v4_4_2_inst_rlc_stop(struct amdgpu_device *adev,
- uint32_t inst_mask)
-{
- /* XXX todo */
-}
-
/**
* sdma_v4_4_2_inst_page_stop - stop the page async dma engines
*
@@ -632,7 +618,6 @@ static void sdma_v4_4_2_inst_enable(struct amdgpu_device *adev, bool enable,
if (!enable) {
sdma_v4_4_2_inst_gfx_stop(adev, inst_mask);
- sdma_v4_4_2_inst_rlc_stop(adev, inst_mask);
if (adev->sdma.has_page_queue)
sdma_v4_4_2_inst_page_stop(adev, inst_mask);
@@ -888,23 +873,6 @@ static void sdma_v4_4_2_init_pg(struct amdgpu_device *adev)
}
-/**
- * sdma_v4_4_2_inst_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- * @inst_mask: mask of dma engine instances to be enabled
- *
- * Set up the compute DMA queues and enable them.
- * Returns 0 for success, error for failure.
- */
-static int sdma_v4_4_2_inst_rlc_resume(struct amdgpu_device *adev,
- uint32_t inst_mask)
-{
- sdma_v4_4_2_init_pg(adev);
-
- return 0;
-}
-
/**
* sdma_v4_4_2_inst_load_microcode - load the sDMA ME ucode
*
@@ -1019,9 +987,7 @@ static int sdma_v4_4_2_inst_start(struct amdgpu_device *adev,
sdma_v4_4_2_inst_ctx_switch_enable(adev, true, inst_mask);
sdma_v4_4_2_inst_enable(adev, true, inst_mask);
} else {
- r = sdma_v4_4_2_inst_rlc_resume(adev, inst_mask);
- if (r)
- return r;
+ sdma_v4_4_2_init_pg(adev);
}
tmp_mask = inst_mask;
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
index a6fcef36c501..d24659a69382 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
@@ -574,18 +574,6 @@ static void sdma_v5_0_gfx_stop(struct amdgpu_device *adev, uint32_t inst_mask)
}
}
-/**
- * sdma_v5_0_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Stop the compute async dma queues (NAVI10).
- */
-static void sdma_v5_0_rlc_stop(struct amdgpu_device *adev)
-{
- /* XXX todo */
-}
-
/**
* sdma_v5_0_ctx_switch_enable - stop the async dma engines context switch
*
@@ -661,7 +649,6 @@ static void sdma_v5_0_enable(struct amdgpu_device *adev, bool enable)
inst_mask = GENMASK(adev->sdma.num_instances - 1, 0);
if (!enable) {
sdma_v5_0_gfx_stop(adev, 1 << inst_mask);
- sdma_v5_0_rlc_stop(adev);
}
if (amdgpu_sriov_vf(adev))
@@ -858,19 +845,6 @@ static int sdma_v5_0_gfx_resume(struct amdgpu_device *adev)
return 0;
}
-/**
- * sdma_v5_0_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Set up the compute DMA queues and enable them (NAVI10).
- * Returns 0 for success, error for failure.
- */
-static int sdma_v5_0_rlc_resume(struct amdgpu_device *adev)
-{
- return 0;
-}
-
/**
* sdma_v5_0_load_microcode - load the sDMA ME ucode
*
@@ -951,7 +925,6 @@ static int sdma_v5_0_start(struct amdgpu_device *adev)
r = sdma_v5_0_gfx_resume(adev);
if (r)
return r;
- r = sdma_v5_0_rlc_resume(adev);
return r;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
index 35cdf6c149f8..76e1f9f39525 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
@@ -424,18 +424,6 @@ static void sdma_v5_2_gfx_stop(struct amdgpu_device *adev, uint32_t inst_mask)
}
}
-/**
- * sdma_v5_2_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Stop the compute async dma queues.
- */
-static void sdma_v5_2_rlc_stop(struct amdgpu_device *adev)
-{
- /* XXX todo */
-}
-
/**
* sdma_v5_2_ctx_switch_enable - stop the async dma engines context switch
*
@@ -510,7 +498,6 @@ static void sdma_v5_2_enable(struct amdgpu_device *adev, bool enable)
inst_mask = GENMASK(adev->sdma.num_instances - 1, 0);
if (!enable) {
sdma_v5_2_gfx_stop(adev, inst_mask);
- sdma_v5_2_rlc_stop(adev);
}
if (!amdgpu_sriov_vf(adev)) {
@@ -705,19 +692,6 @@ static int sdma_v5_2_gfx_resume(struct amdgpu_device *adev)
return 0;
}
-/**
- * sdma_v5_2_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Set up the compute DMA queues and enable them.
- * Returns 0 for success, error for failure.
- */
-static int sdma_v5_2_rlc_resume(struct amdgpu_device *adev)
-{
- return 0;
-}
-
/**
* sdma_v5_2_load_microcode - load the sDMA ME ucode
*
@@ -851,7 +825,6 @@ static int sdma_v5_2_start(struct amdgpu_device *adev)
r = sdma_v5_2_gfx_resume(adev);
if (r)
return r;
- r = sdma_v5_2_rlc_resume(adev);
return r;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
index 303fd7d1b7c8..52a141d0b356 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
@@ -407,18 +407,6 @@ static void sdma_v6_0_gfx_stop(struct amdgpu_device *adev)
}
}
-/**
- * sdma_v6_0_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Stop the compute async dma queues.
- */
-static void sdma_v6_0_rlc_stop(struct amdgpu_device *adev)
-{
- /* XXX todo */
-}
-
/**
* sdma_v6_0_ctxempty_int_enable - enable or disable context empty interrupts
*
@@ -457,7 +445,6 @@ static void sdma_v6_0_enable(struct amdgpu_device *adev, bool enable)
if (!enable) {
sdma_v6_0_gfx_stop(adev);
- sdma_v6_0_rlc_stop(adev);
}
if (amdgpu_sriov_vf(adev))
@@ -642,19 +629,6 @@ static int sdma_v6_0_gfx_resume(struct amdgpu_device *adev)
return 0;
}
-/**
- * sdma_v6_0_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Set up the compute DMA queues and enable them.
- * Returns 0 for success, error for failure.
- */
-static int sdma_v6_0_rlc_resume(struct amdgpu_device *adev)
-{
- return 0;
-}
-
/**
* sdma_v6_0_load_microcode - load the sDMA ME ucode
*
@@ -832,7 +806,6 @@ static int sdma_v6_0_start(struct amdgpu_device *adev)
r = sdma_v6_0_gfx_resume(adev);
if (r)
return r;
- r = sdma_v6_0_rlc_resume(adev);
return r;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
index d5552f206e4d..231bc347df2a 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
@@ -409,18 +409,6 @@ static void sdma_v7_0_gfx_stop(struct amdgpu_device *adev)
}
}
-/**
- * sdma_v7_0_rlc_stop - stop the compute async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Stop the compute async dma queues.
- */
-static void sdma_v7_0_rlc_stop(struct amdgpu_device *adev)
-{
- /* XXX todo */
-}
-
/**
* sdma_v7_0_ctx_switch_enable - stop the async dma engines context switch
*
@@ -448,7 +436,6 @@ static void sdma_v7_0_enable(struct amdgpu_device *adev, bool enable)
if (!enable) {
sdma_v7_0_gfx_stop(adev);
- sdma_v7_0_rlc_stop(adev);
}
if (amdgpu_sriov_vf(adev))
@@ -643,19 +630,6 @@ static int sdma_v7_0_gfx_resume(struct amdgpu_device *adev)
}
-/**
- * sdma_v7_0_rlc_resume - setup and start the async dma engines
- *
- * @adev: amdgpu_device pointer
- *
- * Set up the compute DMA queues and enable them.
- * Returns 0 for success, error for failure.
- */
-static int sdma_v7_0_rlc_resume(struct amdgpu_device *adev)
-{
- return 0;
-}
-
static void sdma_v12_0_free_ucode_buffer(struct amdgpu_device *adev)
{
int i;
@@ -850,7 +824,6 @@ static int sdma_v7_0_start(struct amdgpu_device *adev)
r = sdma_v7_0_gfx_resume(adev);
if (r)
return r;
- r = sdma_v7_0_rlc_resume(adev);
return r;
}
--
2.55.0
next prev parent reply other threads:[~2026-09-08 18:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-08 18:10 [PATCH 0/9] drm/amdgpu/sdma: Improve existing SDMA queue resets (v4) Timur Kristóf
2026-09-08 18:10 ` [PATCH 1/9] drm/amdgpu/sdma: Remove unimplemented soft_reset() for SDMA and SI DMA Timur Kristóf
2026-09-08 18:10 ` Timur Kristóf [this message]
2026-09-08 18:10 ` [PATCH 3/9] drm/amdgpu/sdma: Fix executing duplicate commands after recovery on SDMA v4.4.2 Timur Kristóf
2026-09-08 18:10 ` [PATCH 4/9] drm/amdgpu/sdma: Remove unnecessary guilty tracking of SDMA queues Timur Kristóf
2026-09-08 18:10 ` [PATCH 5/9] drm/amdgpu: Add amdgpu_ring_clear_ring_and_ptrs() Timur Kristóf
2026-09-08 18:10 ` [PATCH 6/9] drm/amdgpu/sdma: Clear SDMA rings after reset before starting them Timur Kristóf
2026-09-08 18:10 ` [PATCH 7/9] drm/amdgpu/sdma: Move SDMA v5.x queue reset to common code Timur Kristóf
2026-09-08 18:10 ` [PATCH 8/9] drm/amdgpu/sdma: Always handle kernel queues in amdgpu_sdma_reset_engine() Timur Kristóf
2026-09-08 18:10 ` [PATCH 9/9] drm/amdgpu/sdma: Use common SDMA legacy queue reset on SDMA v4.4.2 Timur Kristóf
2026-09-11 18:44 ` [PATCH 0/9] drm/amdgpu/sdma: Improve existing SDMA queue resets (v4) Alex Deucher
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