diff options
| author | Edward Cree <ecree.xilinx@gmail.com> | 2022-11-14 16:15:51 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-11-16 12:07:02 +0300 |
| commit | e395153984871e33624ce5e3f72038de979f5b3e (patch) | |
| tree | e48660e1b87d5cf9c5f0193eba575af22c0daf30 /drivers/net/ethernet/sfc/ef100_rx.c | |
| parent | 5ae0c22634029da089dc7ce2602679ba9005dc51 (diff) | |
| download | linux-e395153984871e33624ce5e3f72038de979f5b3e.tar.xz | |
sfc: add ability for an RXQ to grant credits on refill
EF100 hardware streams MAE counter updates to the driver over a dedicated
RX queue; however, the MCPU is not able to detect when RX buffers have
been posted to the ring. Thus, the driver must call
MC_CMD_MAE_COUNTERS_STREAM_GIVE_CREDITS; this patch adds the
infrastructure to support that to the core RXQ handling code.
Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/sfc/ef100_rx.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/ef100_rx.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/net/ethernet/sfc/ef100_rx.c b/drivers/net/ethernet/sfc/ef100_rx.c index 0721260cf2da..735f50385919 100644 --- a/drivers/net/ethernet/sfc/ef100_rx.c +++ b/drivers/net/ethernet/sfc/ef100_rx.c @@ -183,24 +183,32 @@ void efx_ef100_ev_rx(struct efx_channel *channel, const efx_qword_t *p_event) void ef100_rx_write(struct efx_rx_queue *rx_queue) { + unsigned int notified_count = rx_queue->notified_count; struct efx_rx_buffer *rx_buf; unsigned int idx; efx_qword_t *rxd; efx_dword_t rxdb; - while (rx_queue->notified_count != rx_queue->added_count) { - idx = rx_queue->notified_count & rx_queue->ptr_mask; + while (notified_count != rx_queue->added_count) { + idx = notified_count & rx_queue->ptr_mask; rx_buf = efx_rx_buffer(rx_queue, idx); rxd = efx_rx_desc(rx_queue, idx); EFX_POPULATE_QWORD_1(*rxd, ESF_GZ_RX_BUF_ADDR, rx_buf->dma_addr); - ++rx_queue->notified_count; + ++notified_count; } + if (notified_count == rx_queue->notified_count) + return; wmb(); EFX_POPULATE_DWORD_1(rxdb, ERF_GZ_RX_RING_PIDX, rx_queue->added_count & rx_queue->ptr_mask); efx_writed_page(rx_queue->efx, &rxdb, ER_GZ_RX_RING_DOORBELL, efx_rx_queue_index(rx_queue)); + if (rx_queue->grant_credits) + wmb(); + rx_queue->notified_count = notified_count; + if (rx_queue->grant_credits) + schedule_work(&rx_queue->grant_work); } |