linux-kernel - [PATCH 5.12 224/384] drm/msm/a6xx: Fix perfcounter oob timeout

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 10 May 2021 12:20:13 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Akhil P Oommen <akhilpo@...eaurora.org>,
        Rob Clark <robdclark@...omium.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 224/384] drm/msm/a6xx: Fix perfcounter oob timeout

From: Akhil P Oommen <akhilpo@...eaurora.org>

[ Upstream commit 2fc8a92e0a22c483e749232d4f13c77a92139aa7 ]

We were not programing the correct bit while clearing the perfcounter oob.
So, clear it correctly using the new 'clear' bit. This fixes the below
error:

[drm:a6xx_gmu_set_oob] *ERROR* Timeout waiting for GMU OOB set PERFCOUNTER: 0x80000000

Signed-off-by: Akhil P Oommen <akhilpo@...eaurora.org>
Link: https://lore.kernel.org/r/1617630433-36506-1-git-send-email-akhilpo@codeaurora.org
Signed-off-by: Rob Clark <robdclark@...omium.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 91cf46f84025..3d55e153fa9c 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -246,7 +246,7 @@ static int a6xx_gmu_hfi_start(struct a6xx_gmu *gmu)
 }
 
 struct a6xx_gmu_oob_bits {
-	int set, ack, set_new, ack_new;
+	int set, ack, set_new, ack_new, clear, clear_new;
 	const char *name;
 };
 
@@ -260,6 +260,8 @@ static const struct a6xx_gmu_oob_bits a6xx_gmu_oob_bits[] = {
 		.ack = 24,
 		.set_new = 30,
 		.ack_new = 31,
+		.clear = 24,
+		.clear_new = 31,
 	},
 
 	[GMU_OOB_PERFCOUNTER_SET] = {
@@ -268,18 +270,22 @@ static const struct a6xx_gmu_oob_bits a6xx_gmu_oob_bits[] = {
 		.ack = 25,
 		.set_new = 28,
 		.ack_new = 30,
+		.clear = 25,
+		.clear_new = 29,
 	},
 
 	[GMU_OOB_BOOT_SLUMBER] = {
 		.name = "BOOT_SLUMBER",
 		.set = 22,
 		.ack = 30,
+		.clear = 30,
 	},
 
 	[GMU_OOB_DCVS_SET] = {
 		.name = "GPU_DCVS",
 		.set = 23,
 		.ack = 31,
+		.clear = 31,
 	},
 };
 
@@ -335,9 +341,9 @@ void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
 		return;
 
 	if (gmu->legacy)
-		bit = a6xx_gmu_oob_bits[state].ack;
+		bit = a6xx_gmu_oob_bits[state].clear;
 	else
-		bit = a6xx_gmu_oob_bits[state].ack_new;
+		bit = a6xx_gmu_oob_bits[state].clear_new;
 
 	gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << bit);
 }
-- 
2.30.2