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SubjectRe: [PATCH net-next v2 1/3] net: lan966x: Add function lan966x_mac_ip_learn()
Date
On Tue, Jan 04, 2022 at 11:18:47AM +0100, Horatiu Vultur wrote:
> Extend mac functionality with the function lan966x_mac_ip_learn. This
> function adds an entry in the MAC table for IP multicast addresses.
> These entries can copy a frame to the CPU but also can forward on the
> front ports.
> This functionality is needed for mdb support. In case the CPU and some
> of the front ports subscribe to an IP multicast address.
>
> Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
> ---
> .../ethernet/microchip/lan966x/lan966x_mac.c | 33 ++++++++++++++++---
> .../ethernet/microchip/lan966x/lan966x_main.h | 5 +++
> .../ethernet/microchip/lan966x/lan966x_regs.h | 6 ++++
> 3 files changed, 39 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
> index efadb8d326cc..82eb6606e17f 100644
> --- a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
> +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
> @@ -68,17 +68,19 @@ static void lan966x_mac_select(struct lan966x *lan966x,
> lan_wr(mach, lan966x, ANA_MACHDATA);
> }
>
> -int lan966x_mac_learn(struct lan966x *lan966x, int port,
> - const unsigned char mac[ETH_ALEN],
> - unsigned int vid,
> - enum macaccess_entry_type type)
> +static int __lan966x_mac_learn(struct lan966x *lan966x, int pgid,
> + bool cpu_copy,
> + const unsigned char mac[ETH_ALEN],
> + unsigned int vid,
> + enum macaccess_entry_type type)
> {
> lan966x_mac_select(lan966x, mac, vid);
>
> /* Issue a write command */
> lan_wr(ANA_MACACCESS_VALID_SET(1) |
> ANA_MACACCESS_CHANGE2SW_SET(0) |
> - ANA_MACACCESS_DEST_IDX_SET(port) |
> + ANA_MACACCESS_MAC_CPU_COPY_SET(cpu_copy) |
> + ANA_MACACCESS_DEST_IDX_SET(pgid) |
> ANA_MACACCESS_ENTRYTYPE_SET(type) |
> ANA_MACACCESS_MAC_TABLE_CMD_SET(MACACCESS_CMD_LEARN),
> lan966x, ANA_MACACCESS);
> @@ -86,6 +88,27 @@ int lan966x_mac_learn(struct lan966x *lan966x, int port,
> return lan966x_mac_wait_for_completion(lan966x);
> }
>
> +int lan966x_mac_ip_learn(struct lan966x *lan966x,
> + bool cpu_copy,
> + const unsigned char mac[ETH_ALEN],
> + unsigned int vid,
> + enum macaccess_entry_type type)

I think it's worth mentioning in a comment above this function that the
mask of front ports should be encoded into the address by now, via a
call to lan966x_mdb_encode_mac().

> +{
> + WARN_ON(type != ENTRYTYPE_MACV4 && type != ENTRYTYPE_MACV6);
> +
> + return __lan966x_mac_learn(lan966x, 0, cpu_copy, mac, vid, type);
> +}
> +
> +int lan966x_mac_learn(struct lan966x *lan966x, int port,
> + const unsigned char mac[ETH_ALEN],
> + unsigned int vid,
> + enum macaccess_entry_type type)
> +{
> + WARN_ON(type != ENTRYTYPE_NORMAL && type != ENTRYTYPE_LOCKED);
> +
> + return __lan966x_mac_learn(lan966x, port, false, mac, vid, type);
> +}
> +
> int lan966x_mac_forget(struct lan966x *lan966x,
> const unsigned char mac[ETH_ALEN],
> unsigned int vid,
> diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
> index c399b1256edc..f70e54526f53 100644
> --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
> +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
> @@ -157,6 +157,11 @@ int lan966x_port_pcs_set(struct lan966x_port *port,
> struct lan966x_port_config *config);
> void lan966x_port_init(struct lan966x_port *port);
>
> +int lan966x_mac_ip_learn(struct lan966x *lan966x,
> + bool cpu_copy,
> + const unsigned char mac[ETH_ALEN],
> + unsigned int vid,
> + enum macaccess_entry_type type);
> int lan966x_mac_learn(struct lan966x *lan966x, int port,
> const unsigned char mac[ETH_ALEN],
> unsigned int vid,
> diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h b/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h
> index a13c469e139a..797560172aca 100644
> --- a/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h
> +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h
> @@ -169,6 +169,12 @@ enum lan966x_target {
> #define ANA_MACACCESS_CHANGE2SW_GET(x)\
> FIELD_GET(ANA_MACACCESS_CHANGE2SW, x)
>
> +#define ANA_MACACCESS_MAC_CPU_COPY BIT(16)
> +#define ANA_MACACCESS_MAC_CPU_COPY_SET(x)\
> + FIELD_PREP(ANA_MACACCESS_MAC_CPU_COPY, x)
> +#define ANA_MACACCESS_MAC_CPU_COPY_GET(x)\
> + FIELD_GET(ANA_MACACCESS_MAC_CPU_COPY, x)

Could you please add a space between (x) and \.

> +
> #define ANA_MACACCESS_VALID BIT(12)
> #define ANA_MACACCESS_VALID_SET(x)\
> FIELD_PREP(ANA_MACACCESS_VALID, x)
> --
> 2.33.0
>
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