diff options
| author | Subbaraya Sundeep <sbhatta@marvell.com> | 2024-03-18 12:29:54 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-03-20 13:49:07 +0300 |
| commit | a88e0f936ba9a301c78f6eacfd38737d003c130b (patch) | |
| tree | 7d4fb2546e3e95d7172c2fdcad67b734fa78d942 /drivers/net/ethernet/marvell/octeontx2/af/rvu.h | |
| parent | 94e3ca2fef449e14a64a02e0a9864ed314f50e06 (diff) | |
| download | linux-a88e0f936ba9a301c78f6eacfd38737d003c130b.tar.xz | |
octeontx2: Detect the mbox up or down message via register
A single line of interrupt is used to receive up notifications
and down reply messages from AF to PF (similarly from PF to its VF).
PF acts as bridge and forwards VF messages to AF and sends respsones
back from AF to VF. When an async event like link event is received
by up message when PF is in middle of forwarding VF message then
mailbox errors occur because PF state machine is corrupted.
Since VF is a separate driver or VF driver can be in a VM it is
not possible to serialize from the start of communication at VF.
Hence to differentiate between type of messages at PF this patch makes
sender to set mbox data register with distinct values for up and down
messages. Sender also checks whether previous interrupt is received
before triggering current interrupt by waiting for mailbox data register
to become zero.
Fixes: 5a6d7c9daef3 ("octeontx2-pf: Mailbox communication with AF")
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/marvell/octeontx2/af/rvu.h')
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/af/rvu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h index f390525a6217..35834687e40f 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h @@ -591,6 +591,8 @@ struct rvu { spinlock_t mcs_intrq_lock; /* CPT interrupt lock */ spinlock_t cpt_intr_lock; + + struct mutex mbox_lock; /* Serialize mbox up and down msgs */ }; static inline void rvu_write64(struct rvu *rvu, u64 block, u64 offset, u64 val) |