Re: [PATCH V2 9/9] accel/amdxdna: Fill invalid payload for failed command

[Mario Limonciello <superm1@kernel.org>]

The title is 9/9, but I didn't get copied on 0 through 8.  Was that just 
a mistake when you made the patch you sent out one patch instead of 9?

On 2/26/26 6:48 PM, Lizhi Hou wrote:
> Newer userspace applications may read the payload of a failed command
> to obtain detailed error information. However, the driver and old firmware
> versions may not support returning advanced error information.
> In this case, initialize the command payload with an invalid value so
> userspace can detect that no detailed error information is available.
> 
> Fixes: aac243092b70 ("accel/amdxdna: Add command execution")
> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>

Would it also make sense to also detect the firmware version and 
indicate in the logs, IOCTL or a sysfs the feature is available for user 
space to detect?

Nonetheless, this approach is scalable.

Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>

> ---
>   drivers/accel/amdxdna/aie2_ctx.c    | 23 ++++++++---------------
>   drivers/accel/amdxdna/amdxdna_ctx.c | 27 +++++++++++++++++++++++++++
>   drivers/accel/amdxdna/amdxdna_ctx.h |  3 +++
>   3 files changed, 38 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/accel/amdxdna/aie2_ctx.c b/drivers/accel/amdxdna/aie2_ctx.c
> index 622ddbf7fb6f..eb4c9d919885 100644
> --- a/drivers/accel/amdxdna/aie2_ctx.c
> +++ b/drivers/accel/amdxdna/aie2_ctx.c
> @@ -186,13 +186,13 @@ aie2_sched_resp_handler(void *handle, void __iomem *data, size_t size)
>   	cmd_abo = job->cmd_bo;
>   
>   	if (unlikely(job->job_timeout)) {
> -		amdxdna_cmd_set_state(cmd_abo, ERT_CMD_STATE_TIMEOUT);
> +		amdxdna_cmd_set_error(cmd_abo, job, 0, ERT_CMD_STATE_TIMEOUT);
>   		ret = -EINVAL;
>   		goto out;
>   	}
>   
>   	if (unlikely(!data) || unlikely(size != sizeof(u32))) {
> -		amdxdna_cmd_set_state(cmd_abo, ERT_CMD_STATE_ABORT);
> +		amdxdna_cmd_set_error(cmd_abo, job, 0, ERT_CMD_STATE_ABORT);
>   		ret = -EINVAL;
>   		goto out;
>   	}
> @@ -202,7 +202,7 @@ aie2_sched_resp_handler(void *handle, void __iomem *data, size_t size)
>   	if (status == AIE2_STATUS_SUCCESS)
>   		amdxdna_cmd_set_state(cmd_abo, ERT_CMD_STATE_COMPLETED);
>   	else
> -		amdxdna_cmd_set_state(cmd_abo, ERT_CMD_STATE_ERROR);
> +		amdxdna_cmd_set_error(cmd_abo, job, 0, ERT_CMD_STATE_ERROR);
>   
>   out:
>   	aie2_sched_notify(job);
> @@ -244,13 +244,13 @@ aie2_sched_cmdlist_resp_handler(void *handle, void __iomem *data, size_t size)
>   	cmd_abo = job->cmd_bo;
>   
>   	if (unlikely(job->job_timeout)) {
> -		amdxdna_cmd_set_state(cmd_abo, ERT_CMD_STATE_TIMEOUT);
> +		amdxdna_cmd_set_error(cmd_abo, job, 0, ERT_CMD_STATE_TIMEOUT);
>   		ret = -EINVAL;
>   		goto out;
>   	}
>   
>   	if (unlikely(!data) || unlikely(size != sizeof(u32) * 3)) {
> -		amdxdna_cmd_set_state(cmd_abo, ERT_CMD_STATE_ABORT);
> +		amdxdna_cmd_set_error(cmd_abo, job, 0, ERT_CMD_STATE_ABORT);
>   		ret = -EINVAL;
>   		goto out;
>   	}
> @@ -270,19 +270,12 @@ aie2_sched_cmdlist_resp_handler(void *handle, void __iomem *data, size_t size)
>   		 fail_cmd_idx, fail_cmd_status);
>   
>   	if (fail_cmd_status == AIE2_STATUS_SUCCESS) {
> -		amdxdna_cmd_set_state(cmd_abo, ERT_CMD_STATE_ABORT);
> +		amdxdna_cmd_set_error(cmd_abo, job, fail_cmd_idx, ERT_CMD_STATE_ABORT);
>   		ret = -EINVAL;
> -		goto out;
> +	} else {
> +		amdxdna_cmd_set_error(cmd_abo, job, fail_cmd_idx, ERT_CMD_STATE_ERROR);
>   	}
> -	amdxdna_cmd_set_state(cmd_abo, ERT_CMD_STATE_ERROR);
>   
> -	if (amdxdna_cmd_get_op(cmd_abo) == ERT_CMD_CHAIN) {
> -		struct amdxdna_cmd_chain *cc = amdxdna_cmd_get_payload(cmd_abo, NULL);
> -
> -		cc->error_index = fail_cmd_idx;
> -		if (cc->error_index >= cc->command_count)
> -			cc->error_index = 0;
> -	}
>   out:
>   	aie2_sched_notify(job);
>   	return ret;
> diff --git a/drivers/accel/amdxdna/amdxdna_ctx.c b/drivers/accel/amdxdna/amdxdna_ctx.c
> index db3aa26fb55f..405d2c62789d 100644
> --- a/drivers/accel/amdxdna/amdxdna_ctx.c
> +++ b/drivers/accel/amdxdna/amdxdna_ctx.c
> @@ -132,6 +132,33 @@ u32 amdxdna_cmd_get_cu_idx(struct amdxdna_gem_obj *abo)
>   	return INVALID_CU_IDX;
>   }
>   
> +int amdxdna_cmd_set_error(struct amdxdna_gem_obj *abo,
> +			  struct amdxdna_sched_job *job, u32 cmd_idx,
> +			  enum ert_cmd_state error_state)
> +{
> +	struct amdxdna_client *client = job->hwctx->client;
> +	struct amdxdna_cmd *cmd = abo->mem.kva;
> +	struct amdxdna_cmd_chain *cc = NULL;
> +
> +	cmd->header &= ~AMDXDNA_CMD_STATE;
> +	cmd->header |= FIELD_PREP(AMDXDNA_CMD_STATE, error_state);
> +
> +	if (amdxdna_cmd_get_op(abo) == ERT_CMD_CHAIN) {
> +		cc = amdxdna_cmd_get_payload(abo, NULL);
> +		cc->error_index = (cmd_idx < cc->command_count) ? cmd_idx : 0;
> +		abo = amdxdna_gem_get_obj(client, cc->data[0], AMDXDNA_BO_CMD);
> +		if (!abo)
> +			return -EINVAL;
> +		cmd = abo->mem.kva;
> +	}
> +
> +	memset(cmd->data, 0xff, abo->mem.size - sizeof(*cmd));
> +	if (cc)
> +		amdxdna_gem_put_obj(abo);
> +
> +	return 0;
> +}
> +
>   /*
>    * This should be called in close() and remove(). DO NOT call in other syscalls.
>    * This guarantee that when hwctx and resources will be released, if user
> diff --git a/drivers/accel/amdxdna/amdxdna_ctx.h b/drivers/accel/amdxdna/amdxdna_ctx.h
> index 16c85f08f03c..fbdf9d000871 100644
> --- a/drivers/accel/amdxdna/amdxdna_ctx.h
> +++ b/drivers/accel/amdxdna/amdxdna_ctx.h
> @@ -167,6 +167,9 @@ amdxdna_cmd_get_state(struct amdxdna_gem_obj *abo)
>   
>   void *amdxdna_cmd_get_payload(struct amdxdna_gem_obj *abo, u32 *size);
>   u32 amdxdna_cmd_get_cu_idx(struct amdxdna_gem_obj *abo);
> +int amdxdna_cmd_set_error(struct amdxdna_gem_obj *abo,
> +			  struct amdxdna_sched_job *job, u32 cmd_idx,
> +			  enum ert_cmd_state error_state);
>   
>   void amdxdna_sched_job_cleanup(struct amdxdna_sched_job *job);
>   void amdxdna_hwctx_remove_all(struct amdxdna_client *client);