On Thu, Apr 24, 2025 at 02:04:04PM +0200, Paolo Abeni wrote:
> On 4/21/25 6:29 PM, Boon Khai Ng wrote:
> > Refactor VLAN implementation by moving common code for DWMAC4 and
> > DWXGMAC IPs into a separate VLAN module. VLAN implementation for
> > DWMAC4 and DWXGMAC differs only for CSR base address, the descriptor
> > for the VLAN ID and VLAN VALID bit field.
> >
> > The descriptor format for VLAN is not moved to the common code due
> > to hardware-specific differences between DWMAC4 and DWXGMAC.
> >
> > For the DWMAC4 IP, the Receive Normal Descriptor 0 (RDES0) is
> > formatted as follows:
> > 31 0
> > ------------------------ -----------------------
> > RDES0| Inner VLAN TAG [31:16] | Outer VLAN TAG [15:0] |
> > ------------------------ -----------------------
> >
> > For the DWXGMAC IP, the RDES0 format varies based on the
> > Tunneled Frame bit (TNP):
> >
> > a) For Non-Tunneled Frame (TNP=0)
> >
> > 31 0
> > ------------------------ -----------------------
> > RDES0| Inner VLAN TAG [31:16] | Outer VLAN TAG [15:0] |
> > ------------------------ -----------------------
> >
> > b) For Tunneled Frame (TNP=1)
> >
> > 31 8 7 3 2 0
> > --------------------- ------------------ -------
> > RDES0| VNID/VSID | Reserved | OL2L3 |
> > --------------------- ------------------ ------
> >
> > The logic for handling tunneled frames is not yet implemented
> > in the dwxgmac2_wrback_get_rx_vlan_tci() function. Therefore,
> > it is prudent to maintain separate functions within their
> > respective descriptor driver files
> > (dwxgmac2_descs.c and dwmac4_descs.c).
> >
> > Signed-off-by: Boon Khai Ng <boon.khai.ng@xxxxxxxxxx>
> > Reviewed-by: Matthew Gerlach <matthew.gerlach@xxxxxxxxxx>
>
> This patch does IMHO too many things together, and should be split in
> several ones, i.e.:
> - just moving the code in a separate file
> - rename functions and simbols.
> - other random changes...
>
> > - ret = readl_poll_timeout(ioaddr + GMAC_VLAN_TAG, val,
> > - !(val & GMAC_VLAN_TAG_CTRL_OB),
> > - 1000, 500000);
> > - if (ret) {
> > - netdev_err(dev, "Timeout accessing MAC_VLAN_Tag_Filter\n");
> > - return -EBUSY;
> > - }
>
> > + for (i = 0; i < timeout; i++) {
> > + val = readl(ioaddr + VLAN_TAG);
> > + if (!(val & VLAN_TAG_CTRL_OB))
> > + return 0;
> > + udelay(1);
> > + }
> > +
> > + netdev_err(dev, "Timeout accessing MAC_VLAN_Tag_Filter\n");
> > +
> > + return -EBUSY;
>
> ... like the above on (which looks unnecessary?!?)
Also looks like a backward step, because we ask people to use the helper
macros where possible.
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