[RFC PATCH: v3 1/2] add mi device in qemu

[Klaus Jensen]

On Aug  3 12:54, Padmakar Kalghatgi wrote:
> From: padmakar <p.kalghatgi at samsung.com>
> 
> This patch contains the implementation of certain commands 
> of nvme-mi specification.The MI commands are useful to
> manage/configure/monitor the device.Eventhough the MI commands
> can be sent via the inband NVMe-MI send/recieve commands, the idea 
> here is to emulate the sideband interface for MI.
> 
> The changes here includes the interface for i2c/smbus 
> for nvme-mi protocol. We have used i2c address of 0x15
> using which the guest VM can send and recieve the nvme-mi
> commands. Since the nvme-mi device uses the I2C_SLAVE as
> parent, we have used the send and recieve callbacks by
> which the nvme-mi device will get the required notification.
> With the callback approach, we have eliminated the use of 
> threads. 
> 
> One needs to specify the following command in the launch to
> specify the nvme-mi device, link to nvme and assign the i2c address.
> <-device nvme-mi,nvme=nvme0,address=0x15>
> 
> This module makes use of the NvmeCtrl structure of the nvme module,
> to fetch relevant information of the nvme device which are used in
> some of the mi commands. Eventhough certain commands might require
> modification to the nvme module, currently we have currently refrained
> from making changes to the nvme module.
> 
> cmd-name                              cmd-type
> *************************************************
> read nvme-mi ds                        nvme-mi
> configuration set                      nvme-mi
> configuration get                      nvme-mi
> vpd read                               nvme-mi
> vpd write                              nvme-mi
> controller Health Staus Poll           nvme-mi
> nvme subsystem health status poll      nvme-mi
> identify                               nvme-admin
> get log page                           nvme-admin
> get features                           nvme-admin
> 
> Signed-off-by: Padmakar Kalghatgi <p.kalghatgi at samsung.com>
> Reviewed-by: Klaus Birkelund Jensen <k.jensen at samsung.com>
> Reviewed-by: Jaegyu Choi <jg123.choi at samsung.com>
> 

My Reviewed-by here was added by mistake. I've not given it my formal
R-b, but I'll provide a proper review on-list ASAP.

But just glossing over it, I like this approach a lot better than v1
(vsock).
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-nvme/attachments/20210818/5de4c9bd/attachment.sig>