Re: [PATCH v5 2/7] bbdev: add device status info

[Maxime Coquelin <maxime.coquelin@redhat.com>]

Hi,

On 8/25/22 20:30, Chautru, Nicolas wrote:
> Thanks Maxime,
> 
>> -----Original Message-----
>> From: Maxime Coquelin <maxime.coquelin@redhat.com>
>> Sent: Thursday, August 25, 2022 7:19 AM
>> To: Chautru, Nicolas <nicolas.chautru@intel.com>; dev@dpdk.org;
>> thomas@monjalon.net; gakhil@marvell.com; hemant.agrawal@nxp.com
>> Cc: trix@redhat.com; mdr@ashroe.eu; Richardson, Bruce
>> <bruce.richardson@intel.com>; david.marchand@redhat.com;
>> stephen@networkplumber.org
>> Subject: Re: [PATCH v5 2/7] bbdev: add device status info
>>
>>
>>
>> On 7/7/22 01:28, Nicolas Chautru wrote:
>>> Added device status information, so that the PMD can expose
>>> information related to the underlying accelerator device status.
>>> Minor order change in structure to fit into padding hole.
>>>
>>> Signed-off-by: Nicolas Chautru <nicolas.chautru@intel.com>
>>> ---
>>>    drivers/baseband/acc100/rte_acc100_pmd.c           |  1 +
>>>    drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c |  1 +
>>>    drivers/baseband/fpga_lte_fec/fpga_lte_fec.c       |  1 +
>>>    drivers/baseband/la12xx/bbdev_la12xx.c             |  1 +
>>>    drivers/baseband/null/bbdev_null.c                 |  1 +
>>>    drivers/baseband/turbo_sw/bbdev_turbo_software.c   |  1 +
>>>    lib/bbdev/rte_bbdev.c                              | 22 ++++++++++++++
>>>    lib/bbdev/rte_bbdev.h                              | 35 ++++++++++++++++++++--
>>>    lib/bbdev/version.map                              |  6 ++++
>>>    9 files changed, 67 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/baseband/acc100/rte_acc100_pmd.c
>>> b/drivers/baseband/acc100/rte_acc100_pmd.c
>>> index de7e4bc..17ba798 100644
>>> --- a/drivers/baseband/acc100/rte_acc100_pmd.c
>>> +++ b/drivers/baseband/acc100/rte_acc100_pmd.c
>>> @@ -1060,6 +1060,7 @@
>>>
>>>    	/* Read and save the populated config from ACC100 registers */
>>>    	fetch_acc100_config(dev);
>>> +	dev_info->device_status = RTE_BBDEV_DEV_NOT_SUPPORTED;
>>>
>>>    	/* This isn't ideal because it reports the maximum number of queues
>> but
>>>    	 * does not provide info on how many can be uplink/downlink or
>>> different diff --git
>>> a/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c
>>> b/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c
>>> index 82ae6ba..57b12af 100644
>>> --- a/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c
>>> +++ b/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c
>>> @@ -369,6 +369,7 @@
>>>    	dev_info->capabilities = bbdev_capabilities;
>>>    	dev_info->cpu_flag_reqs = NULL;
>>>    	dev_info->data_endianness = RTE_LITTLE_ENDIAN;
>>> +	dev_info->device_status = RTE_BBDEV_DEV_NOT_SUPPORTED;
>>>
>>>    	/* Calculates number of queues assigned to device */
>>>    	dev_info->max_num_queues = 0;
>>> diff --git a/drivers/baseband/fpga_lte_fec/fpga_lte_fec.c
>>> b/drivers/baseband/fpga_lte_fec/fpga_lte_fec.c
>>> index 21d3529..2a330c4 100644
>>> --- a/drivers/baseband/fpga_lte_fec/fpga_lte_fec.c
>>> +++ b/drivers/baseband/fpga_lte_fec/fpga_lte_fec.c
>>> @@ -645,6 +645,7 @@ struct __rte_cache_aligned fpga_queue {
>>>    	dev_info->capabilities = bbdev_capabilities;
>>>    	dev_info->cpu_flag_reqs = NULL;
>>>    	dev_info->data_endianness = RTE_LITTLE_ENDIAN;
>>> +	dev_info->device_status = RTE_BBDEV_DEV_NOT_SUPPORTED;
>>>
>>>    	/* Calculates number of queues assigned to device */
>>>    	dev_info->max_num_queues = 0;
>>> diff --git a/drivers/baseband/la12xx/bbdev_la12xx.c
>>> b/drivers/baseband/la12xx/bbdev_la12xx.c
>>> index 4d1bd16..c1f88c6 100644
>>> --- a/drivers/baseband/la12xx/bbdev_la12xx.c
>>> +++ b/drivers/baseband/la12xx/bbdev_la12xx.c
>>> @@ -100,6 +100,7 @@ struct bbdev_la12xx_params {
>>>    	dev_info->capabilities = bbdev_capabilities;
>>>    	dev_info->cpu_flag_reqs = NULL;
>>>    	dev_info->min_alignment = 64;
>>> +	dev_info->device_status = RTE_BBDEV_DEV_NOT_SUPPORTED;
>>>
>>>    	rte_bbdev_log_debug("got device info from %u", dev->data-
>>> dev_id);
>>>    }
>>> diff --git a/drivers/baseband/null/bbdev_null.c
>>> b/drivers/baseband/null/bbdev_null.c
>>> index 248e129..94a1976 100644
>>> --- a/drivers/baseband/null/bbdev_null.c
>>> +++ b/drivers/baseband/null/bbdev_null.c
>>> @@ -82,6 +82,7 @@ struct bbdev_queue {
>>>    	 * here for code completeness.
>>>    	 */
>>>    	dev_info->data_endianness = RTE_LITTLE_ENDIAN;
>>> +	dev_info->device_status = RTE_BBDEV_DEV_NOT_SUPPORTED;
>>>
>>>    	rte_bbdev_log_debug("got device info from %u", dev->data-
>>> dev_id);
>>>    }
>>> diff --git a/drivers/baseband/turbo_sw/bbdev_turbo_software.c
>>> b/drivers/baseband/turbo_sw/bbdev_turbo_software.c
>>> index af7bc41..dbc5524 100644
>>> --- a/drivers/baseband/turbo_sw/bbdev_turbo_software.c
>>> +++ b/drivers/baseband/turbo_sw/bbdev_turbo_software.c
>>> @@ -254,6 +254,7 @@ struct turbo_sw_queue {
>>>    	dev_info->min_alignment = 64;
>>>    	dev_info->harq_buffer_size = 0;
>>>    	dev_info->data_endianness = RTE_LITTLE_ENDIAN;
>>> +	dev_info->device_status = RTE_BBDEV_DEV_NOT_SUPPORTED;
>>>
>>>    	rte_bbdev_log_debug("got device info from %u\n", dev->data-
>>> dev_id);
>>>    }
>>> diff --git a/lib/bbdev/rte_bbdev.c b/lib/bbdev/rte_bbdev.c index
>>> 4da8047..38630a2 100644
>>> --- a/lib/bbdev/rte_bbdev.c
>>> +++ b/lib/bbdev/rte_bbdev.c
>>> @@ -1133,3 +1133,25 @@ struct rte_mempool *
>>>    	rte_bbdev_log(ERR, "Invalid operation type");
>>>    	return NULL;
>>>    }
>>> +
>>> +const char *
>>> +rte_bbdev_device_status_str(enum rte_bbdev_device_status status) {
>>> +	static const char * const dev_sta_string[] = {
>>> +		"RTE_BBDEV_DEV_NOSTATUS",
>>> +		"RTE_BBDEV_DEV_NOT_SUPPORTED",
>>> +		"RTE_BBDEV_DEV_RESET",
>>> +		"RTE_BBDEV_DEV_CONFIGURED",
>>> +		"RTE_BBDEV_DEV_ACTIVE",
>>> +		"RTE_BBDEV_DEV_FATAL_ERR",
>>> +		"RTE_BBDEV_DEV_RESTART_REQ",
>>> +		"RTE_BBDEV_DEV_RECONFIG_REQ",
>>> +		"RTE_BBDEV_DEV_CORRECT_ERR",
>>> +	};
>>> +
>>> +	if (status < sizeof(dev_sta_string) / sizeof(char *))
>>> +		return dev_sta_string[status];
>>> +
>>> +	rte_bbdev_log(ERR, "Invalid device status");
>>> +	return NULL;
>>> +}
>>> diff --git a/lib/bbdev/rte_bbdev.h b/lib/bbdev/rte_bbdev.h index
>>> b88c881..9b1ffa4 100644
>>> --- a/lib/bbdev/rte_bbdev.h
>>> +++ b/lib/bbdev/rte_bbdev.h
>>> @@ -223,6 +223,21 @@ struct rte_bbdev_queue_conf {
>>>    int
>>>    rte_bbdev_queue_stop(uint16_t dev_id, uint16_t queue_id);
>>>
>>> +/**
>>> + * Flags indicate the status of the device  */ enum
>>> +rte_bbdev_device_status {
>>> +	RTE_BBDEV_DEV_NOSTATUS,        /**< Nothing being reported */
>>> +	RTE_BBDEV_DEV_NOT_SUPPORTED,   /**< Device status is not
>> supported on the PMD */
>>> +	RTE_BBDEV_DEV_RESET,           /**< Device in reset and un-
>> configured state */
>>> +	RTE_BBDEV_DEV_CONFIGURED,      /**< Device is configured and
>> ready to use */
>>> +	RTE_BBDEV_DEV_ACTIVE,          /**< Device is configured and VF is
>> being used */
>>> +	RTE_BBDEV_DEV_FATAL_ERR,       /**< Device has hit a fatal
>> uncorrectable error */
>>> +	RTE_BBDEV_DEV_RESTART_REQ,     /**< Device requires application
>> to restart */
>>> +	RTE_BBDEV_DEV_RECONFIG_REQ,    /**< Device requires
>> application to reconfigure queues */
>>> +	RTE_BBDEV_DEV_CORRECT_ERR,     /**< Warning of a correctable
>> error event happened */
>>> +};
>>
>> I don't have a strong opinion on this, but I think NOT_SUPPORTED should be
>> a special value. If you want to keep 0 value for NOSTATUS, maybe you could
>> do:
>>
>> enum rte_bbdev_device_status {
>> 	RTE_BBDEV_DEV_NOT_SUPPORTED = -1,   /**< Device status is not
>> supported
>> on the PMD */
>> 	RTE_BBDEV_DEV_NOSTATUS = 0,        /**< Nothing being reported
>> */
>> 	RTE_BBDEV_DEV_RESET,           /**< Device in reset and un-
>> configured
>> state */
>> ...
> 
> Thanks Maxime. My concern is that I am upstreaming in parallel in pf_bb_config in parallel hence would like to keep it unchanged if possible.
> Given you don’t have a strong opinion is that okay to keep as is? Or I can force special value 1 for NOT_SUPPORTED so that this is explicitly defined. But really enum should always be used.

I don't understand. It should not have any impact on pf_bb_config, given
pf_bb_config does not use DPDK.

Maxime