linux-stable.git/drivers/net/mdio, branch v6.6

net: mdio-mux: fix C45 access returning -EIO after API change

2023-10-19T01:08:23+00:00

The mii_bus API conversion to read_c45() and write_c45() did not cover
the mdio-mux driver before read() and write() were made C22-only.

This broke arch/arm64/boot/dts/freescale/fsl-ls1028a-qds-13bb.dtso.
The -EOPNOTSUPP from mdiobus_c45_read() is transformed by
get_phy_c45_devs_in_pkg() into -EIO, is further propagated to
of_mdiobus_register() and this makes the mdio-mux driver fail to probe
the entire child buses, not just the PHYs that cause access errors.

Fix the regression by introducing special c45 read and write accessors
to mdio-mux which forward the operation to the parent MDIO bus.

Fixes: db1a63aed89c ("net: phy: Remove fallback to old C45 method")
Signed-off-by: Vladimir Oltean 
Reviewed-by: Florian Fainelli 
Reviewed-by: Andrew Lunn 
Reviewed-by: Russell King (Oracle) 
Link: https://lore.kernel.org/r/20231017143144.3212657-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2023-08-24T17:51:39+00:00

Cross-merge networking fixes after downstream PR.

Conflicts:

include/net/inet_sock.h
  f866fbc842de ("ipv4: fix data-races around inet->inet_id")
  c274af224269 ("inet: introduce inet->inet_flags")
https://lore.kernel.org/all/679ddff6-db6e-4ff6-b177-574e90d0103d@tessares.net/

Adjacent changes:

drivers/net/bonding/bond_alb.c
  e74216b8def3 ("bonding: fix macvlan over alb bond support")
  f11e5bd159b0 ("bonding: support balance-alb with openvswitch")

drivers/net/ethernet/broadcom/bgmac.c
  d6499f0b7c7c ("net: bgmac: Return PTR_ERR() for fixed_phy_register()")
  23a14488ea58 ("net: bgmac: Fix return value check for fixed_phy_register()")

drivers/net/ethernet/broadcom/genet/bcmmii.c
  32bbe64a1386 ("net: bcmgenet: Fix return value check for fixed_phy_register()")
  acf50d1adbf4 ("net: bcmgenet: Return PTR_ERR() for fixed_phy_register()")

net/sctp/socket.c
  f866fbc842de ("ipv4: fix data-races around inet->inet_id")
  b09bde5c3554 ("inet: move inet->mc_loop to inet->inet_frags")

Signed-off-by: Jakub Kicinski

net: mdio: xgene: remove useless xgene_mdio_status

2023-08-19T18:25:27+00:00

xgene_mdio_status is declared static, and is only written once by the
driver. It appears to have been this way since the driver was first
added to the kernel tree. No other users can be found, so let's remove
it.

Signed-off-by: Russell King (Oracle) 
Reviewed-by: Simon Horman 
Signed-off-by: David S. Miller

net: mdio: mdio-bitbang: Fix C45 read/write protocol

2023-08-19T11:41:33+00:00

Based on the original code semantic in case of Clause 45 MDIO, the address
command is supposed to be followed by the command sending the MMD address,
not the CSR address. The commit 002dd3de097c ("net: mdio: mdio-bitbang:
Separate C22 and C45 transactions") has erroneously broken that. So most
likely due to an unfortunate variable name it switched the code to sending
the CSR address. In our case it caused the protocol malfunction so the
read operation always failed with the turnaround bit always been driven to
one by PHY instead of zero. Fix that by getting back the correct
behaviour: sending MMD address command right after the regular address
command.

Fixes: 002dd3de097c ("net: mdio: mdio-bitbang: Separate C22 and C45 transactions")
Signed-off-by: Serge Semin 
Reviewed-by: Andrew Lunn 
Signed-off-by: David S. Miller

net: mdio: fix -Wvoid-pointer-to-enum-cast warning

2023-08-18T02:25:40+00:00

When building with clang 18 I see the following warning:
|       drivers/net/mdio/mdio-xgene.c:338:13: warning: cast to smaller integer
|               type 'enum xgene_mdio_id' from 'const void *' [-Wvoid-pointer-to-enum-cast]
|         338 |                 mdio_id = (enum xgene_mdio_id)of_id->data;

This is due to the fact that `of_id->data` is a void* while `enum
xgene_mdio_id` has the size of an int. This leads to truncation and
possible data loss.

Link: https://github.com/ClangBuiltLinux/linux/issues/1910
Reported-by: Nathan Chancellor 
Signed-off-by: Justin Stitt 
Reviewed-by: Andrew Lunn 
Reviewed-by: Russell King (Oracle) 
Link: https://lore.kernel.org/r/20230815-void-drivers-net-mdio-mdio-xgene-v1-1-5304342e0659@google.com
Signed-off-by: Jakub Kicinski

net: mdio: Remove unnecessary (void*) conversions

2023-07-19T02:00:47+00:00

No need cast (void*) to (struct xgene_mdio_pdata *).

Signed-off-by: Wu Yunchuan 
Reviewed-by: Andrew Lunn 
Link: https://lore.kernel.org/r/20230717031212.54991-1-yunchuan@nfschina.com
Signed-off-by: Jakub Kicinski

net: phy: mdio-bcm-unimac: Add asp v2.0 support

2023-07-17T06:39:04+00:00

Add mdio compat string for ASP 2.0 ethernet driver.

Reviewed-by: Simon Horman 
Reviewed-by: Andrew Lunn 
Signed-off-by: Florian Fainelli 
Signed-off-by: Justin Chen 
Signed-off-by: David S. Miller

mdio: mdio-mux-mmioreg: Use of_property_read_reg() to parse "reg"

2023-06-12T09:56:01+00:00

Use the recently added of_property_read_reg() helper to get the
untranslated "reg" address value.

Signed-off-by: Rob Herring 
Signed-off-by: David S. Miller

net: mdio: Introduce a regmap-based mdio driver

2023-06-05T08:56:36+00:00

There exists several examples today of devices that embed an ethernet
PHY or PCS directly inside an SoC. In this situation, either the device
is controlled through a vendor-specific register set, or sometimes
exposes the standard 802.3 registers that are typically accessed over
MDIO.

As phylib and phylink are designed to use mdiodevices, this driver
allows creating a virtual MDIO bus, that translates mdiodev register
accesses to regmap accesses.

The reason we use regmap is because there are at least 3 such devices
known today, 2 of them are Altera TSE PCS's, memory-mapped, exposed
with a 4-byte stride in stmmac's dwmac-socfpga variant, and a 2-byte
stride in altera-tse. The other one (nxp,sja1110-base-tx-mdio) is
exposed over SPI.

Signed-off-by: Maxime Chevallier 
Reviewed-by: Simon Horman 
Signed-off-by: David S. Miller

net: mdio: i2c: fix rollball accessors

2023-05-15T09:15:57+00:00

Commit 87e3bee0f247 ("net: mdio: i2c: Separate C22 and C45 transactions")
separated the non-rollball bus accessors, but left the rollball
accessors as is. As rollball accessors are clause 45, this results
in the rollball protocol being completely non-functional. Fix this.

Fixes: 87e3bee0f247 ("net: mdio: i2c: Separate C22 and C45 transactions")
Signed-off-by: Russell King (Oracle) 
Reviewed-by: Andrew Lunn 
Signed-off-by: David S. Miller