[RFC,net-next,0/8] net: Add support for Synopsys DesignWare XPCS

This adds support for Synopsys DesignWare XPCS in net subsystem and
integrates it into stmmac.

At 1/8, we start by removing the limitation of stmmac selftests that needed
a PHY to pass all the tests.

Then at 2/8 and 3/8 we add and use some new helpers in PHYLINK so that we
can simplify some code in stmmac and possible other drivers.

At 4/8, we fallback to dev_fwnode() so that PCI based setups wich may
not have CONFIG_OF can still use FW node.

We proceed by doing changes in PHYLINK in order to support XPCS: At 5/8 we
add some missing speeds that USXGMII supports and at 6/8 we do the most
important change to support XPCS that allows to configure MAC and PCS
withouht having any PHY neither SFP attached.

Support for XPCS is finally introduced at 7/8, along with the usage of it
in stmmac driver at 8/8.

---
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---

Jose Abreu (8):
  net: stmmac: selftests: Do not fail if PHY is not attached
  net: phylink: Add phylink_and and phylink_andnot Helpers
  net: stmmac: Switch to phylink_and()/phylink_andnot()
  net: stmmac: Fallback to dev_fwnode() if needed
  net: phylink: Add missing Backplane speeds
  net: phylink: Configure MAC/PCS when link is up without PHY
  net: phy: Add Synopsys DesignWare XPCS MDIO module
  net: stmmac: Integrate it with DesignWare XPCS

 MAINTAINERS                                        |   7 +
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |   1 +
 drivers/net/ethernet/stmicro/stmmac/common.h       |   3 +
 drivers/net/ethernet/stmicro/stmmac/hwif.h         |  12 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |  32 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c  |  27 +
 .../net/ethernet/stmicro/stmmac/stmmac_selftests.c |   2 +-
 drivers/net/phy/Kconfig                            |   6 +
 drivers/net/phy/Makefile                           |   1 +
 drivers/net/phy/mdio-xpcs.c                        | 567 +++++++++++++++++++++
 drivers/net/phy/phylink.c                          |  16 +-
 include/linux/mdio-xpcs.h                          |  41 ++
 include/linux/phylink.h                            |   4 +
 include/linux/stmmac.h                             |   1 +
 14 files changed, 708 insertions(+), 12 deletions(-)
 create mode 100644 drivers/net/phy/mdio-xpcs.c
 create mode 100644 include/linux/mdio-xpcs.h

On Mon, Jan 27, 2020 at 12:09:07PM +0100, Jose Abreu wrote:
> Add two new helpers for bitmap handling.

Please use linkmode_andnot() and linkmode_and() instead.

> 
> Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
> 
> ---
> Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
> Cc: Alexandre Torgue <alexandre.torgue@st.com>
> Cc: Jose Abreu <joabreu@synopsys.com>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
> Cc: Russell King <linux@armlinux.org.uk>
> Cc: Andrew Lunn <andrew@lunn.ch>
> Cc: Florian Fainelli <f.fainelli@gmail.com>
> Cc: Heiner Kallweit <hkallweit1@gmail.com>
> Cc: netdev@vger.kernel.org
> Cc: linux-stm32@st-md-mailman.stormreply.com
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> ---
>  include/linux/phylink.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/include/linux/phylink.h b/include/linux/phylink.h
> index 523209e70947..70a2f7a4450b 100644
> --- a/include/linux/phylink.h
> +++ b/include/linux/phylink.h
> @@ -272,6 +272,10 @@ int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
>  
>  #define phylink_zero(bm) \
>  	bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS)
> +#define phylink_and(bm, obm) \
> +	bitmap_and(bm, bm, obm, __ETHTOOL_LINK_MODE_MASK_NBITS)
> +#define phylink_andnot(bm, obm) \
> +	bitmap_andnot(bm, bm, obm, __ETHTOOL_LINK_MODE_MASK_NBITS)
>  #define __phylink_do_bit(op, bm, mode) \
>  	op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm)
>  
> -- 
> 2.7.4
> 
>