diff options
Diffstat (limited to 'drivers/firmware/arm_scmi/shmem.c')
| -rw-r--r-- | drivers/firmware/arm_scmi/shmem.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/shmem.c b/drivers/firmware/arm_scmi/shmem.c index e1e816e0018c..0e3eaea5d852 100644 --- a/drivers/firmware/arm_scmi/shmem.c +++ b/drivers/firmware/arm_scmi/shmem.c @@ -67,6 +67,21 @@ void shmem_fetch_response(struct scmi_shared_mem __iomem *shmem, memcpy_fromio(xfer->rx.buf, shmem->msg_payload + 4, xfer->rx.len); } +void shmem_fetch_notification(struct scmi_shared_mem __iomem *shmem, + size_t max_len, struct scmi_xfer *xfer) +{ + /* Skip only the length of header in shmem area i.e 4 bytes */ + xfer->rx.len = min_t(size_t, max_len, ioread32(&shmem->length) - 4); + + /* Take a copy to the rx buffer.. */ + memcpy_fromio(xfer->rx.buf, shmem->msg_payload, xfer->rx.len); +} + +void shmem_clear_channel(struct scmi_shared_mem __iomem *shmem) +{ + iowrite32(SCMI_SHMEM_CHAN_STAT_CHANNEL_FREE, &shmem->channel_status); +} + bool shmem_poll_done(struct scmi_shared_mem __iomem *shmem, struct scmi_xfer *xfer) { |