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Message-ID: <20220817204224.v4.6.Idf2ba51078e87ae7ceb75cc77a5bd4ff2bd31eab@changeid>
Date: Wed, 17 Aug 2022 20:44:19 +0530
From: Akhil P Oommen <quic_akhilpo@...cinc.com>
To: freedreno <freedreno@...ts.freedesktop.org>,
<dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
Rob Clark <robdclark@...il.com>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
"Dmitry Baryshkov" <dmitry.baryshkov@...aro.org>
CC: Matthias Kaehlcke <mka@...omium.org>,
Jonathan Marek <jonathan@...ek.ca>,
Jordan Crouse <jordan@...micpenguin.net>,
Douglas Anderson <dianders@...omium.org>,
Akhil P Oommen <quic_akhilpo@...cinc.com>,
"Abhinav Kumar" <quic_abhinavk@...cinc.com>,
Chia-I Wu <olvaffe@...il.com>,
"Dan Carpenter" <dan.carpenter@...cle.com>,
Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...ux.ie>, Sean Paul <sean@...rly.run>,
Wang Qing <wangqing@...o.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v4 6/7] drm/msm/a6xx: Improve gpu recovery sequence
We can do a few more things to improve our chance at a successful gpu
recovery, especially during a hangcheck timeout:
1. Halt CP and GMU core
2. Do RBBM GBIF HALT sequence
3. Do a soft reset of GPU core
Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
---
(no changes since v1)
drivers/gpu/drm/msm/adreno/a6xx.xml.h | 4 ++
drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 77 +++++++++++++++++++++--------------
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 7 ++++
3 files changed, 58 insertions(+), 30 deletions(-)
diff --git a/drivers/gpu/drm/msm/adreno/a6xx.xml.h b/drivers/gpu/drm/msm/adreno/a6xx.xml.h
index b03e2c4..beea4a7 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx.xml.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx.xml.h
@@ -1413,6 +1413,10 @@ static inline uint32_t REG_A6XX_RBBM_PERFCTR_RBBM_SEL(uint32_t i0) { return 0x00
#define REG_A6XX_RBBM_GBIF_CLIENT_QOS_CNTL 0x00000011
+#define REG_A6XX_RBBM_GBIF_HALT 0x00000016
+
+#define REG_A6XX_RBBM_GBIF_HALT_ACK 0x00000017
+
#define REG_A6XX_RBBM_WAIT_FOR_GPU_IDLE_CMD 0x0000001c
#define A6XX_RBBM_WAIT_FOR_GPU_IDLE_CMD_WAIT_GPU_IDLE 0x00000001
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 9f76f5b..db05942 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -869,9 +869,47 @@ static void a6xx_gmu_rpmh_off(struct a6xx_gmu *gmu)
(val & 1), 100, 1000);
}
+#define GBIF_CLIENT_HALT_MASK BIT(0)
+#define GBIF_ARB_HALT_MASK BIT(1)
+
+static void a6xx_bus_clear_pending_transactions(struct adreno_gpu *adreno_gpu)
+{
+ struct msm_gpu *gpu = &adreno_gpu->base;
+
+ if (!a6xx_has_gbif(adreno_gpu)) {
+ gpu_write(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL0, 0xf);
+ spin_until((gpu_read(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL1) &
+ 0xf) == 0xf);
+ gpu_write(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL0, 0);
+
+ return;
+ }
+
+ /* Halt the gx side of GBIF */
+ gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, 1);
+ spin_until(gpu_read(gpu, REG_A6XX_RBBM_GBIF_HALT_ACK) & 1);
+
+ /* Halt new client requests on GBIF */
+ gpu_write(gpu, REG_A6XX_GBIF_HALT, GBIF_CLIENT_HALT_MASK);
+ spin_until((gpu_read(gpu, REG_A6XX_GBIF_HALT_ACK) &
+ (GBIF_CLIENT_HALT_MASK)) == GBIF_CLIENT_HALT_MASK);
+
+ /* Halt all AXI requests on GBIF */
+ gpu_write(gpu, REG_A6XX_GBIF_HALT, GBIF_ARB_HALT_MASK);
+ spin_until((gpu_read(gpu, REG_A6XX_GBIF_HALT_ACK) &
+ (GBIF_ARB_HALT_MASK)) == GBIF_ARB_HALT_MASK);
+
+ /* The GBIF halt needs to be explicitly cleared */
+ gpu_write(gpu, REG_A6XX_GBIF_HALT, 0x0);
+}
+
/* Force the GMU off in case it isn't responsive */
static void a6xx_gmu_force_off(struct a6xx_gmu *gmu)
{
+ struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
+ struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
+ struct msm_gpu *gpu = &adreno_gpu->base;
+
/* Flush all the queues */
a6xx_hfi_stop(gmu);
@@ -883,6 +921,15 @@ static void a6xx_gmu_force_off(struct a6xx_gmu *gmu)
/* Make sure there are no outstanding RPMh votes */
a6xx_gmu_rpmh_off(gmu);
+
+ /* Halt the gmu cm3 core */
+ gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
+
+ a6xx_bus_clear_pending_transactions(adreno_gpu);
+
+ /* Reset GPU core blocks */
+ gpu_write(gpu, REG_A6XX_RBBM_SW_RESET_CMD, 1);
+ udelay(100);
}
static void a6xx_gmu_set_initial_freq(struct msm_gpu *gpu, struct a6xx_gmu *gmu)
@@ -1010,36 +1057,6 @@ bool a6xx_gmu_isidle(struct a6xx_gmu *gmu)
return true;
}
-#define GBIF_CLIENT_HALT_MASK BIT(0)
-#define GBIF_ARB_HALT_MASK BIT(1)
-
-static void a6xx_bus_clear_pending_transactions(struct adreno_gpu *adreno_gpu)
-{
- struct msm_gpu *gpu = &adreno_gpu->base;
-
- if (!a6xx_has_gbif(adreno_gpu)) {
- gpu_write(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL0, 0xf);
- spin_until((gpu_read(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL1) &
- 0xf) == 0xf);
- gpu_write(gpu, REG_A6XX_VBIF_XIN_HALT_CTRL0, 0);
-
- return;
- }
-
- /* Halt new client requests on GBIF */
- gpu_write(gpu, REG_A6XX_GBIF_HALT, GBIF_CLIENT_HALT_MASK);
- spin_until((gpu_read(gpu, REG_A6XX_GBIF_HALT_ACK) &
- (GBIF_CLIENT_HALT_MASK)) == GBIF_CLIENT_HALT_MASK);
-
- /* Halt all AXI requests on GBIF */
- gpu_write(gpu, REG_A6XX_GBIF_HALT, GBIF_ARB_HALT_MASK);
- spin_until((gpu_read(gpu, REG_A6XX_GBIF_HALT_ACK) &
- (GBIF_ARB_HALT_MASK)) == GBIF_ARB_HALT_MASK);
-
- /* The GBIF halt needs to be explicitly cleared */
- gpu_write(gpu, REG_A6XX_GBIF_HALT, 0x0);
-}
-
/* Gracefully try to shut down the GMU and by extension the GPU */
static void a6xx_gmu_shutdown(struct a6xx_gmu *gmu)
{
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 0ec4fcd..a9335bc 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -920,6 +920,10 @@ static int hw_init(struct msm_gpu *gpu)
/* Make sure the GMU keeps the GPU on while we set it up */
a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET);
+ /* Clear GBIF halt in case GX domain was not collapsed */
+ if (a6xx_has_gbif(adreno_gpu))
+ gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, 0);
+
gpu_write(gpu, REG_A6XX_RBBM_SECVID_TSB_CNTL, 0);
/*
@@ -1205,6 +1209,9 @@ static void a6xx_recover(struct msm_gpu *gpu)
if (hang_debug)
a6xx_dump(gpu);
+ /* Halt SQE first */
+ gpu_write(gpu, REG_A6XX_CP_SQE_CNTL, 3);
+
/*
* Turn off keep alive that might have been enabled by the hang
* interrupt
--
2.7.4
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