[PATCH] drm/amdgpu: check whether smu is idle in sriov case
Alex Deucher
alexdeucher at gmail.com
Thu Jul 6 14:05:21 UTC 2023
On Thu, Jul 6, 2023 at 8:01 AM Danijel Slivka <danijel.slivka at amd.com> wrote:
>
> Why:
> If the reg mmMP1_SMN_C2PMSG_90 is being programed to 0x0 before
> guest initialization, then modprobe amdgpu will fail at smu hw_init.
> (the default mmMP1_SMN_C2PMSG_90 at a clean guest environment is 0x1).
>
> How to fix:
> this patch is to check whether smu is idle by sending a test
> message to smu. If smu is idle, it will respond.
>
> Signed-off-by: Danijel Slivka <danijel.slivka at amd.com>
> Signed-off-by: Nikola Prica <nikola.prica at amd.com>
> Signed-off-by: Jingwen Chen <Jingwen.Chen2 at amd.com>
> Signed-off-by: pengzhou <PengJu.Zhou at amd.com>
> ---
> drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 8 ++++
> drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h | 7 ++++
> drivers/gpu/drm/amd/pm/swsmu/inc/smu_v11_0.h | 2 +
> .../gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | 1 +
> .../gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c | 5 +++
> drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c | 40 +++++++++++++++++++
> drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h | 2 +
> 7 files changed, 65 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> index ce41a8309582..63ea4cd32ece 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> @@ -1443,6 +1443,14 @@ static int smu_start_smc_engine(struct smu_context *smu)
> }
> }
>
> + if (amdgpu_sriov_vf(adev) && smu->ppt_funcs->wait_smu_idle) {
> + ret = smu->ppt_funcs->wait_smu_idle(smu);
> + if (ret) {
> + dev_err(adev->dev, "SMU is not idle\n");
> + return ret;
> + }
> + }
> +
> /*
> * Send msg GetDriverIfVersion to check if the return value is equal
> * with DRIVER_IF_VERSION of smc header.
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
> index 6e2069dcb6b9..1bf87ad30d93 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
> +++ b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
> @@ -926,6 +926,13 @@ struct pptable_funcs {
> */
> int (*check_fw_status)(struct smu_context *smu);
>
> + /**
> + * @wait_smu_idle: wait for SMU idle status.
> + *
> + * Return: Zero if check passes, negative errno on failure.
> + */
> + int (*wait_smu_idle)(struct smu_context *smu);
> +
> /**
> * @set_mp1_state: put SMU into a correct state for comming
> * resume from runpm or gpu reset.
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/smu_v11_0.h b/drivers/gpu/drm/amd/pm/swsmu/inc/smu_v11_0.h
> index d466db6f0ad4..f3293ddd1a1b 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/inc/smu_v11_0.h
> +++ b/drivers/gpu/drm/amd/pm/swsmu/inc/smu_v11_0.h
> @@ -165,6 +165,8 @@ int smu_v11_0_fini_power(struct smu_context *smu);
>
> int smu_v11_0_check_fw_status(struct smu_context *smu);
>
> +int smu_v11_0_wait_smu_idle(struct smu_context *smu);
> +
> int smu_v11_0_setup_pptable(struct smu_context *smu);
>
> int smu_v11_0_get_vbios_bootup_values(struct smu_context *smu);
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
> index c94d825a871b..f4e7596dcdcd 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
> @@ -3503,6 +3503,7 @@ static const struct pptable_funcs navi10_ppt_funcs = {
> .init_power = smu_v11_0_init_power,
> .fini_power = smu_v11_0_fini_power,
> .check_fw_status = smu_v11_0_check_fw_status,
> + .wait_smu_idle = smu_v11_0_wait_smu_idle,
Drop the smu_v11_0 wrapper and just use the cmn function directly.
> .setup_pptable = navi10_setup_pptable,
> .get_vbios_bootup_values = smu_v11_0_get_vbios_bootup_values,
> .check_fw_version = smu_v11_0_check_fw_version,
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
> index aa4a5498a12f..059dc2243c06 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
> @@ -195,6 +195,11 @@ int smu_v11_0_check_fw_status(struct smu_context *smu)
> return -EIO;
> }
>
> +int smu_v11_0_wait_smu_idle(struct smu_context *smu)
> +{
> + return smu_wait_smu_idle(smu);
> +}
Drop this.
> +
> int smu_v11_0_check_fw_version(struct smu_context *smu)
> {
> struct amdgpu_device *adev = smu->adev;
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
> index 3ecb900e6ecd..5dc81d7b04da 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
> @@ -313,6 +313,46 @@ int smu_cmn_wait_for_response(struct smu_context *smu)
> return res;
> }
>
> +/**
> + * smu_wait_smu_idle -- wait for smu to become idle
> + * @smu: pointer to an SMU context
> + *
> + * Send SMU_MSG_TestMessage to check whether SMU is idle.
> + * If SMU is idle, it will respond.
> + * The returned parameter will be the param you pass + 1.
> + *
> + * Return 0 on success, -errno on error, indicating the execution
> + * status and result of the message being waited for. See
> + * __smu_cmn_reg2errno() for details of the -errno.
> + */
> +int smu_wait_smu_idle(struct smu_context *smu)
Rename this smu_cmn_wait_smu_idle() for consistency.
Alex
> +{
> + u32 reg;
> + u32 param = 0xff00011;
> + uint32_t read_arg;
> + int res, index;
> +
> + index = smu_cmn_to_asic_specific_index(smu,
> + CMN2ASIC_MAPPING_MSG,
> + SMU_MSG_TestMessage);
> +
> + __smu_cmn_send_msg(smu, index, param);
> + reg = __smu_cmn_poll_stat(smu);
> + res = __smu_cmn_reg2errno(smu, reg);
> +
> + if (unlikely(smu->adev->pm.smu_debug_mask & SMU_DEBUG_HALT_ON_ERROR) &&
> + res && (res != -ETIME)) {
> + amdgpu_device_halt(smu->adev);
> + WARN_ON(1);
> + }
> +
> + smu_cmn_read_arg(smu, &read_arg);
> + if (read_arg == param + 1)
> + return 0;
> + return res;
> +}
> +
> +
> /**
> * smu_cmn_send_smc_msg_with_param -- send a message with parameter
> * @smu: pointer to an SMU context
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
> index d7cd358a53bd..abe875513d77 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
> @@ -50,6 +50,8 @@ int smu_cmn_send_debug_smc_msg_with_param(struct smu_context *smu,
>
> int smu_cmn_wait_for_response(struct smu_context *smu);
>
> +int smu_wait_smu_idle(struct smu_context *smu);
> +
> int smu_cmn_to_asic_specific_index(struct smu_context *smu,
> enum smu_cmn2asic_mapping_type type,
> uint32_t index);
> --
> 2.25.1
>
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