netdev - Re: [PATCH v2 net-next 0/2] ionic: add devlink dev flash support

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Date:   Fri, 4 Sep 2020 11:20:11 -0700
From:   Shannon Nelson <snelson@...sando.io>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH v2 net-next 0/2] ionic: add devlink dev flash support

On 9/4/20 8:01 AM, Jakub Kicinski wrote:
> On Thu,  3 Sep 2020 17:05:32 -0700 Shannon Nelson wrote:
>> Add support for using devlink's dev flash facility to update the
>> firmware on an ionic device.  This is a simple model of pushing the
>> firmware file to the NIC, asking the NIC to unpack and install the file
>> into the device, and then selecting it for the next boot.  If any of
>> these steps fail, the whole transaction is failed.
>>
>> We don't currently support doing these steps individually.  In the future
>> we want to be able to list the FW that is installed and selectable but
>> don't yet have the API to fully support that.
>>
>> v2: change "Activate" to "Select" in status messages
> Thanks!
>
> Slightly off-topic for these patches but every new C file in ionic adds
> a set of those warnings (from sparse, I think, because it still builds):
>
> ../drivers/net/ethernet/pensando/ionic/ionic_debugfs.c: note: in included file (through ../drivers/net/ethernet/pensando/ionic/ionic.h):
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:37:1: error: static assertion failed: "sizeof(union ionic_dev_regs) == 4096"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:39:1: error: static assertion failed: "sizeof(union ionic_dev_cmd_regs) == 2048"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:55:1: error: static assertion failed: "sizeof(struct ionic_dev_getattr_comp) == 16"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:56:1: error: static assertion failed: "sizeof(struct ionic_dev_setattr_cmd) == 64"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:57:1: error: static assertion failed: "sizeof(struct ionic_dev_setattr_comp) == 16"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:67:1: error: static assertion failed: "sizeof(struct ionic_port_getattr_comp) == 16"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:77:1: error: static assertion failed: "sizeof(struct ionic_lif_getattr_comp) == 16"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:78:1: error: static assertion failed: "sizeof(struct ionic_lif_setattr_cmd) == 64"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:79:1: error: static assertion failed: "sizeof(struct ionic_lif_setattr_comp) == 16"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:81:1: error: static assertion failed: "sizeof(struct ionic_q_init_cmd) == 64"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:118:1: error: static assertion failed: "sizeof(struct ionic_vf_setattr_cmd) == 64"
> ../drivers/net/ethernet/pensando/ionic/ionic_dev.h:121:1: error: static assertion failed: "sizeof(struct ionic_vf_getattr_comp) == 16"
>
> Any ideas on why?

It's probably related to this discussion:
https://lore.kernel.org/linux-sparse/ecdd10cb-0022-8f8a-ec36-9d51b3ae85ee@pensando.io/

I thought we'd worked out our struct alignment issues, but I'll see if I 
can carve out some time to take another look at that.

sln