6.18-stable review patch. If anyone has any objections, please let me know.
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From: Jonas Gorski jonas.gorski@gmail.com
[ Upstream commit 3b08863469aa6028ac7c3120966f4e2f6051cf6b ]
We currently use the mask 0xf for writing and reading b53_entry::port, but this is only correct for unicast ARL entries. Multicast ARL entries use a bitmask, and 0xf is not enough space for ports > 3, which includes the CPU port.
So extend the mask accordingly to also fit port 4 (bit 4) and MII (bit 5). According to the datasheet the multicast port mask is [60:48], making it 12 bit wide, but bits 60-55 are reserved anyway, and collide with the priority field at [60:59], so I am not sure if this is valid. Therefore leave it at the actual used range, [53:48].
The ARL search result register differs a bit, and there the mask is only [52:48], so only spanning the user ports. The MII port bit is contained in the Search Result Extension register. So create a separate search result parse function that properly handles this.
Fixes: c45655386e53 ("net: dsa: b53: add support for FDB operations on 5325/5365") Reviewed-by: Florian Fainelli florian.fainelli@broadcom.com Signed-off-by: Jonas Gorski jonas.gorski@gmail.com Link: https://patch.msgid.link/20251128080625.27181-6-jonas.gorski@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/b53/b53_common.c | 4 +++- drivers/net/dsa/b53/b53_priv.h | 25 +++++++++++++++++++++---- drivers/net/dsa/b53/b53_regs.h | 8 +++++++- 3 files changed, 31 insertions(+), 6 deletions(-)
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index db1ed8c9c536e..5544e8e9c6446 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -2099,10 +2099,12 @@ static void b53_arl_search_read_25(struct b53_device *dev, u8 idx, struct b53_arl_entry *ent) { u64 mac_vid; + u8 ext;
+ b53_read8(dev, B53_ARLIO_PAGE, B53_ARL_SRCH_RSLT_EXT_25, &ext); b53_read64(dev, B53_ARLIO_PAGE, B53_ARL_SRCH_RSTL_0_MACVID_25, &mac_vid); - b53_arl_to_entry_25(ent, mac_vid); + b53_arl_search_to_entry_25(ent, mac_vid, ext); }
static void b53_arl_search_read_89(struct b53_device *dev, u8 idx, diff --git a/drivers/net/dsa/b53/b53_priv.h b/drivers/net/dsa/b53/b53_priv.h index ae2c615c088ed..f4afbfcc345e6 100644 --- a/drivers/net/dsa/b53/b53_priv.h +++ b/drivers/net/dsa/b53/b53_priv.h @@ -348,8 +348,8 @@ static inline void b53_arl_to_entry_25(struct b53_arl_entry *ent, ent->is_age = !!(mac_vid & ARLTBL_AGE_25); ent->is_static = !!(mac_vid & ARLTBL_STATIC_25); u64_to_ether_addr(mac_vid, ent->mac); - ent->port = (mac_vid >> ARLTBL_DATA_PORT_ID_S_25) & - ARLTBL_DATA_PORT_ID_MASK_25; + ent->port = (mac_vid & ARLTBL_DATA_PORT_ID_MASK_25) >> + ARLTBL_DATA_PORT_ID_S_25; if (is_unicast_ether_addr(ent->mac) && ent->port == B53_CPU_PORT) ent->port = B53_CPU_PORT_25; ent->vid = (mac_vid >> ARLTBL_VID_S_65) & ARLTBL_VID_MASK_25; @@ -388,8 +388,8 @@ static inline void b53_arl_from_entry_25(u64 *mac_vid, if (is_unicast_ether_addr(ent->mac) && ent->port == B53_CPU_PORT_25) *mac_vid |= (u64)B53_CPU_PORT << ARLTBL_DATA_PORT_ID_S_25; else - *mac_vid |= (u64)(ent->port & ARLTBL_DATA_PORT_ID_MASK_25) << - ARLTBL_DATA_PORT_ID_S_25; + *mac_vid |= ((u64)ent->port << ARLTBL_DATA_PORT_ID_S_25) & + ARLTBL_DATA_PORT_ID_MASK_25; *mac_vid |= (u64)(ent->vid & ARLTBL_VID_MASK_25) << ARLTBL_VID_S_65; if (ent->is_valid) @@ -414,6 +414,23 @@ static inline void b53_arl_from_entry_89(u64 *mac_vid, u32 *fwd_entry, *fwd_entry |= ARLTBL_AGE_89; }
+static inline void b53_arl_search_to_entry_25(struct b53_arl_entry *ent, + u64 mac_vid, u8 ext) +{ + memset(ent, 0, sizeof(*ent)); + ent->is_valid = !!(mac_vid & ARLTBL_VALID_25); + ent->is_age = !!(mac_vid & ARLTBL_AGE_25); + ent->is_static = !!(mac_vid & ARLTBL_STATIC_25); + u64_to_ether_addr(mac_vid, ent->mac); + ent->vid = (mac_vid >> ARLTBL_VID_S_65) & ARLTBL_VID_MASK_25; + ent->port = (mac_vid & ARL_SRCH_RSLT_PORT_ID_MASK_25) >> + ARL_SRCH_RSLT_PORT_ID_S_25; + if (is_multicast_ether_addr(ent->mac) && (ext & ARL_SRCH_RSLT_EXT_MC_MII)) + ent->port |= BIT(B53_CPU_PORT_25); + else if (!is_multicast_ether_addr(ent->mac) && ent->port == B53_CPU_PORT) + ent->port = B53_CPU_PORT_25; +} + static inline void b53_arl_search_to_entry_63xx(struct b53_arl_entry *ent, u64 mac_vid, u16 fwd_entry) { diff --git a/drivers/net/dsa/b53/b53_regs.h b/drivers/net/dsa/b53/b53_regs.h index fcedd5fb00337..e0379e70900b7 100644 --- a/drivers/net/dsa/b53/b53_regs.h +++ b/drivers/net/dsa/b53/b53_regs.h @@ -328,7 +328,7 @@ #define ARLTBL_VID_MASK_25 0xff #define ARLTBL_VID_MASK 0xfff #define ARLTBL_DATA_PORT_ID_S_25 48 -#define ARLTBL_DATA_PORT_ID_MASK_25 0xf +#define ARLTBL_DATA_PORT_ID_MASK_25 GENMASK_ULL(53, 48) #define ARLTBL_VID_S_65 53 #define ARLTBL_AGE_25 BIT_ULL(61) #define ARLTBL_STATIC_25 BIT_ULL(62) @@ -374,6 +374,12 @@
/* Single register search result on 5325/5365 */ #define B53_ARL_SRCH_RSTL_0_MACVID_25 0x24 +#define ARL_SRCH_RSLT_PORT_ID_S_25 48 +#define ARL_SRCH_RSLT_PORT_ID_MASK_25 GENMASK_ULL(52, 48) + +/* BCM5325/5365 Search result extend register (8 bit) */ +#define B53_ARL_SRCH_RSLT_EXT_25 0x2c +#define ARL_SRCH_RSLT_EXT_MC_MII BIT(2)
/* ARL Search Data Result (32 bit) */ #define B53_ARL_SRCH_RSTL_0 0x68