Re: [dpdk-dev] getting pointer for struct ixgbe_hw

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

> -----Original Message-----
> From: Serguei Bezverkhi (sbezverk) [mailto:sbezverk@cisco.com]
> Sent: Monday, September 21, 2015 3:53 PM
> To: Ananyev, Konstantin; Van Haaren, Harry; dev@dpdk.org
> Subject: RE: getting pointer for struct ixgbe_hw
> 
> Hi Konstantin,
> 
> I need to setup certain parameters per VF from guest VM.
> 
> Here is the list:
> 
> #define IXGBE_VF_RESET                            0x01 /* VF requests reset */
> #define IXGBE_VF_SET_MAC_ADDR      0x02 /* VF requests PF to set MAC addr */
> #define IXGBE_VF_SET_MULTICAST       0x03 /* VF requests PF to set MC addr */
> #define IXGBE_VF_SET_VLAN   0x04 /* VF requests PF to set VLAN */
> #define IXGBE_VF_SET_LPE       0x05 /* VF requests PF to set VMOLR.LPE */
> #define IXGBE_VF_SET_MACVLAN         0x06 /* VF requests PF for unicast filter */
> #define IXGBE_VF_API_NEGOTIATE       0x08 /* negotiate API version */
> #define IXGBE_VF_API_NEGOTIATE                       0x08 /* negotiate API version */
> #define IXGBE_VF_GET_QUEUES                            0x09 /* get queue configuration */
> #define IXGBE_VF_ENABLE_MACADDR                                0x0A /* enable MAC address */
> #define IXGBE_VF_DISABLE_MACADDR               0x0B /* disable MAC address */
> #define IXGBE_VF_GET_MACADDRS                     0x0C /* get all configured MAC addrs */
> #define IXGBE_VF_SET_MCAST_PROMISC          0x0D /* enable multicast promiscuous */
> #define IXGBE_VF_GET_MTU                   0x0E /* get bounds on MTU */
> #define IXGBE_VF_SET_MTU                    0x0F /* set a specific MTU */


It is not really a device parameters - what you listed is a set of supported mailbox commands.
Basically mailbox is reserved for communication between PF/VF and you don't need to send this commands via maibox to PF directly.
This is done inside PMD .

Let say when you call rte_eth_dev_default_mac_addr_set() for ixgbe VF it would cause:
rte_eth_dev_default_mac_addr_set()
   ->ixgbevf_set_default_mac_addr()
       -> hw->mac.ops.set_rar()
           -> ixgbe_set_rar_vf()
               ->send IXGBE_VF_SET_MAC_ADDR message to PF via mailbox and wait for response.

Konstantin
  
> 
> The only way I found so far was directly using mailbox facility between PF and VF. If you can suggest more proper way of doing it, I
> would appreciate if you let me know.
> 
> Thank you
> 
> Serguei
> 
> Serguei Bezverkhi,
> TECHNICAL LEADER.SERVICES
> Global SP Services
> sbezverk@cisco.com
> Phone: +1 416 306 7312
> Mobile: +1 514 234 7374
> 
> CCIE (R&S,SP,Sec) - #9527
> 
> Cisco.com
> 
> 
> 
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> 
> -----Original Message-----
> From: Ananyev, Konstantin [mailto:konstantin.ananyev@intel.com]
> Sent: Monday, September 21, 2015 10:41 AM
> To: Serguei Bezverkhi (sbezverk) <sbezverk@cisco.com>; Van Haaren, Harry <harry.van.haaren@intel.com>; dev@dpdk.org
> Subject: RE: getting pointer for struct ixgbe_hw
> 
> Hi Serguei,
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Serguei Bezverkhi
> > (sbezverk)
> > Sent: Monday, September 21, 2015 3:12 PM
> > To: Van Haaren, Harry; dev@dpdk.org
> > Subject: Re: [dpdk-dev] getting pointer for struct ixgbe_hw
> >
> > Hi Harry,
> >
> > Thank you for your reply. The reason I was looking for specifically
> > ixgbe_hw because I needed access to ixgbe PF/VF mailbox facility. I am not sure if it is exposed via rte_eth api. Please advise.
> 
> You are not supposed to send/recv messages via HW mailbox directly from the user application.
> To configure device there exists rte_eth* API.
> Wonder what exactly you are trying to achieve?
> Konstantin
> 
> >
> > Best regards
> >
> > Serguei
> >
> >
> > Serguei Bezverkhi,
> > TECHNICAL LEADER.SERVICES
> > Global SP Services
> > sbezverk@cisco.com
> > Phone: +1 416 306 7312
> > Mobile: +1 514 234 7374
> >
> > CCIE (R&S,SP,Sec) - #9527
> >
> > Cisco.com
> >
> >
> >
> >  Think before you print.
> > This email may contain confidential and privileged material for the
> > sole use of the intended recipient. Any review, use, distribution or
> > disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please
> contact the sender by reply email and delete all copies of this message.
> > Please click here for Company Registration Information.
> >
> >
> >
> > -----Original Message-----
> > From: Van Haaren, Harry [mailto:harry.van.haaren@intel.com]
> > Sent: Monday, September 21, 2015 10:06 AM
> > To: Serguei Bezverkhi (sbezverk) <sbezverk@cisco.com>; dev@dpdk.org
> > Subject: RE: getting pointer for struct ixgbe_hw
> >
> > Hi Serguei,
> >
> > > From: Serguei Bezverkhi
> > > I would appreciate if somebody could share an example of getting
> > > access to ixgbe_hw structure for already initialized ixgbe nic. I
> > > tried to find any references but could not find any API returning pointer for this structure.
> >
> > The ixgbe_hw struct is part of the implementation, and should not be
> > used by code outside the drivers/net/ixgbe director. The
> > rte_eth_* api[1] is available to access any NIC using a unified API.
> >
> > Hope that helps, -Harry
> >
> > [1] http://www.dpdk.org/doc/api/rte__ethdev_8h.html