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From cd6e2e59e7b2cbe6dcd1c252a3710da07240046c Mon Sep 17 00:00:00 2001
From: Daniel Kurtz <djkurtz@chromium.org>
Date: Mon, 12 Nov 2018 14:48:12 +0530
Subject: [PATCH 0787/2940] drm/amdgpu: refactor smu8_send_msg_to_smc and
WARN_ON time out
This patch refactors smu8_send_msg_to_smc_with_parameter() to include
smu8_send_msg_to_smc_async() so that all the messages sent to SMU can be
profiled and appropriately reported if they fail.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
.../drm/amd/powerplay/smumgr/smu8_smumgr.c | 45 +++++++++----------
1 file changed, 21 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/smu8_smumgr.c b/drivers/gpu/drm/amd/powerplay/smumgr/smu8_smumgr.c
index 09b844ec3eab..b6e8c89ca03a 100644
--- a/drivers/gpu/drm/amd/powerplay/smumgr/smu8_smumgr.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/smu8_smumgr.c
@@ -24,6 +24,7 @@
#include <linux/delay.h>
#include <linux/gfp.h>
#include <linux/kernel.h>
+#include <linux/ktime.h>
#include <linux/slab.h>
#include <linux/types.h>
@@ -61,9 +62,13 @@ static uint32_t smu8_get_argument(struct pp_hwmgr *hwmgr)
mmSMU_MP1_SRBM2P_ARG_0);
}
-static int smu8_send_msg_to_smc_async(struct pp_hwmgr *hwmgr, uint16_t msg)
+/* Send a message to the SMC, and wait for its response.*/
+static int smu8_send_msg_to_smc_with_parameter(struct pp_hwmgr *hwmgr,
+ uint16_t msg, uint32_t parameter)
{
int result = 0;
+ ktime_t t_start;
+ s64 elapsed_us;
if (hwmgr == NULL || hwmgr->device == NULL)
return -EINVAL;
@@ -74,28 +79,31 @@ static int smu8_send_msg_to_smc_async(struct pp_hwmgr *hwmgr, uint16_t msg)
/* Read the last message to SMU, to report actual cause */
uint32_t val = cgs_read_register(hwmgr->device,
mmSMU_MP1_SRBM2P_MSG_0);
- pr_err("smu8_send_msg_to_smc_async (0x%04x) failed\n", msg);
- pr_err("SMU still servicing msg (0x%04x)\n", val);
+ pr_err("%s(0x%04x) aborted; SMU still servicing msg (0x%04x)\n",
+ __func__, msg, val);
return result;
}
+ t_start = ktime_get();
+
+ cgs_write_register(hwmgr->device, mmSMU_MP1_SRBM2P_ARG_0, parameter);
cgs_write_register(hwmgr->device, mmSMU_MP1_SRBM2P_RESP_0, 0);
cgs_write_register(hwmgr->device, mmSMU_MP1_SRBM2P_MSG_0, msg);
- return 0;
+ result = PHM_WAIT_FIELD_UNEQUAL(hwmgr,
+ SMU_MP1_SRBM2P_RESP_0, CONTENT, 0);
+
+ elapsed_us = ktime_us_delta(ktime_get(), t_start);
+
+ WARN(result, "%s(0x%04x, %#x) timed out after %lld us\n",
+ __func__, msg, parameter, elapsed_us);
+
+ return result;
}
-/* Send a message to the SMC, and wait for its response.*/
static int smu8_send_msg_to_smc(struct pp_hwmgr *hwmgr, uint16_t msg)
{
- int result = 0;
-
- result = smu8_send_msg_to_smc_async(hwmgr, msg);
- if (result != 0)
- return result;
-
- return PHM_WAIT_FIELD_UNEQUAL(hwmgr,
- SMU_MP1_SRBM2P_RESP_0, CONTENT, 0);
+ return smu8_send_msg_to_smc_with_parameter(hwmgr, msg, 0);
}
static int smu8_set_smc_sram_address(struct pp_hwmgr *hwmgr,
@@ -135,17 +143,6 @@ static int smu8_write_smc_sram_dword(struct pp_hwmgr *hwmgr,
return result;
}
-static int smu8_send_msg_to_smc_with_parameter(struct pp_hwmgr *hwmgr,
- uint16_t msg, uint32_t parameter)
-{
- if (hwmgr == NULL || hwmgr->device == NULL)
- return -EINVAL;
-
- cgs_write_register(hwmgr->device, mmSMU_MP1_SRBM2P_ARG_0, parameter);
-
- return smu8_send_msg_to_smc(hwmgr, msg);
-}
-
static int smu8_check_fw_load_finish(struct pp_hwmgr *hwmgr,
uint32_t firmware)
{
--
2.17.1
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