netdev - Re: [PATCH net-next 2/2] qed: Add API for flashing the nvm attributes.

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Date:   Wed, 24 Jul 2019 19:42:45 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "skalluru@...vell.com" <skalluru@...vell.com>,
        "davem@...emloft.net" <davem@...emloft.net>
CC:     "aelior@...vell.com" <aelior@...vell.com>,
        "mkalderon@...vell.com" <mkalderon@...vell.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 2/2] qed: Add API for flashing the nvm
 attributes.

On Tue, 2019-07-23 at 21:51 -0700, Sudarsana Reddy Kalluru wrote:
> The patch adds driver interface for reading the NVM config request
> and
> update the attributes on nvm config flash partition.
> 

You didn't not use the get_cfg API you added in previous patch.

Also can you please clarify how the user reads/write from/to NVM config
? i mean what UAPIs and tools are being used ?

> Signed-off-by: Sudarsana Reddy Kalluru <skalluru@...vell.com>
> Signed-off-by: Ariel Elior <aelior@...vell.com>
> ---
>  drivers/net/ethernet/qlogic/qed/qed_main.c | 65
> ++++++++++++++++++++++++++++++
>  include/linux/qed/qed_if.h                 |  1 +
>  2 files changed, 66 insertions(+)
> 
> diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c
> b/drivers/net/ethernet/qlogic/qed/qed_main.c
> index 829dd60..54f00d2 100644
> --- a/drivers/net/ethernet/qlogic/qed/qed_main.c
> +++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
> @@ -67,6 +67,8 @@
>  #define QED_ROCE_QPS			(8192)
>  #define QED_ROCE_DPIS			(8)
>  #define QED_RDMA_SRQS                   QED_ROCE_QPS
> +#define QED_NVM_CFG_SET_FLAGS		0xE
> +#define QED_NVM_CFG_SET_PF_FLAGS	0x1E
>  
>  static char version[] =
>  	"QLogic FastLinQ 4xxxx Core Module qed " DRV_MODULE_VERSION
> "\n";
> @@ -2227,6 +2229,66 @@ static int qed_nvm_flash_image_validate(struct
> qed_dev *cdev,
>  	return 0;
>  }
>  
> +/* Binary file format -
> + *     /----------------------------------------------------------
> ------------\
> + * 0B  |                       0x5 [command
> index]                            |
> + * 4B  | Entity ID     | Reserved        |  Number of config
> attributes       |
> + * 8B  | Config ID                       | Length        |
> Value              |
> +
> *     |                                                              
>         |
> + *     \----------------------------------------------------------
> ------------/
> + * There can be several Cfg_id-Length-Value sets as specified by
> 'Number of...'.
> + * Entity ID - A non zero entity value for which the config need to
> be updated.
> + */
> +static int qed_nvm_flash_cfg_write(struct qed_dev *cdev, const u8
> **data)
> +{
> +	struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
> +	u8 entity_id, len, buf[32];
> +	struct qed_ptt *ptt;
> +	u16 cfg_id, count;
> +	int rc = 0, i;
> +	u32 flags;
> +
> +	ptt = qed_ptt_acquire(hwfn);
> +	if (!ptt)
> +		return -EAGAIN;
> +
> +	/* NVM CFG ID attribute header */
> +	*data += 4;
> +	entity_id = **data;
> +	*data += 2;
> +	count = *((u16 *)*data);
> +	*data += 2;
> +
> +	DP_VERBOSE(cdev, NETIF_MSG_DRV,
> +		   "Read config ids: entity id %02x num _attrs =
> %0d\n",
> +		   entity_id, count);
> +	/* NVM CFG ID attributes */
> +	for (i = 0; i < count; i++) {
> +		cfg_id = *((u16 *)*data);
> +		*data += 2;
> +		len = **data;
> +		(*data)++;
> +		memcpy(buf, *data, len);
> +		*data += len;
> +
> +		flags = entity_id ? QED_NVM_CFG_SET_PF_FLAGS :
> +			QED_NVM_CFG_SET_FLAGS;
> +
> +		DP_VERBOSE(cdev, NETIF_MSG_DRV,
> +			   "cfg_id = %d len = %d\n", cfg_id, len);
> +		rc = qed_mcp_nvm_set_cfg(hwfn, ptt, cfg_id, entity_id,
> flags,
> +					 buf, len);
> +		if (rc) {
> +			DP_ERR(cdev, "Error %d configuring %d\n", rc,
> cfg_id);
> +			break;
> +		}
> +	}
> +
> +	qed_ptt_release(hwfn, ptt);
> +
> +	return rc;
> +}
> +
>  static int qed_nvm_flash(struct qed_dev *cdev, const char *name)
>  {
>  	const struct firmware *image;
> @@ -2268,6 +2330,9 @@ static int qed_nvm_flash(struct qed_dev *cdev,
> const char *name)
>  			rc = qed_nvm_flash_image_access(cdev, &data,
>  							&check_resp);
>  			break;
> +		case QED_NVM_FLASH_CMD_NVM_CFG_ID:
> +			rc = qed_nvm_flash_cfg_write(cdev, &data);
> +			break;
>  		default:
>  			DP_ERR(cdev, "Unknown command %08x\n",
> cmd_type);
>  			rc = -EINVAL;
> diff --git a/include/linux/qed/qed_if.h b/include/linux/qed/qed_if.h
> index eef02e6..23805ea 100644
> --- a/include/linux/qed/qed_if.h
> +++ b/include/linux/qed/qed_if.h
> @@ -804,6 +804,7 @@ enum qed_nvm_flash_cmd {
>  	QED_NVM_FLASH_CMD_FILE_DATA = 0x2,
>  	QED_NVM_FLASH_CMD_FILE_START = 0x3,
>  	QED_NVM_FLASH_CMD_NVM_CHANGE = 0x4,
> +	QED_NVM_FLASH_CMD_NVM_CFG_ID = 0x5,
>  	QED_NVM_FLASH_CMD_NVM_MAX,
>  };
>