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Message-Id: <1665099838-94839-4-git-send-email-jdamato@fastly.com> Date: Thu, 6 Oct 2022 16:43:57 -0700 From: Joe Damato <jdamato@...tly.com> To: intel-wired-lan@...ts.osuosl.org Cc: netdev@...r.kernel.org, kuba@...nel.org, davem@...emloft.net, anthony.l.nguyen@...el.com, jesse.brandeburg@...el.com, maciej.fijalkowski@...el.com, Joe Damato <jdamato@...tly.com> Subject: [next-queue v3 3/4] i40e: Record number of RXes cleaned during NAPI Adjust i40e_clean_rx_irq and i40e_clean_rx_irq_zc to accept an out parameter which records the number of RX packets cleaned. Care has been taken to avoid any changes in control flow. Signed-off-by: Joe Damato <jdamato@...tly.com> --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 14 ++++++++++---- drivers/net/ethernet/intel/i40e/i40e_xsk.c | 6 +++++- drivers/net/ethernet/intel/i40e/i40e_xsk.h | 3 ++- 3 files changed, 17 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index a2cc98e..adf133b 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -2426,6 +2426,7 @@ static void i40e_inc_ntc(struct i40e_ring *rx_ring) * i40e_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf * @rx_ring: rx descriptor ring to transact packets on * @budget: Total limit on number of packets to process + * @rx_cleaned: Out parameter of the number of packets processed * * This function provides a "bounce buffer" approach to Rx interrupt * processing. The advantage to this is that on systems that have @@ -2434,7 +2435,8 @@ static void i40e_inc_ntc(struct i40e_ring *rx_ring) * * Returns amount of work completed **/ -static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) +static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget, + unsigned int *rx_cleaned) { unsigned int total_rx_bytes = 0, total_rx_packets = 0, frame_sz = 0; u16 cleaned_count = I40E_DESC_UNUSED(rx_ring); @@ -2571,6 +2573,8 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) i40e_update_rx_stats(rx_ring, total_rx_bytes, total_rx_packets); + *rx_cleaned = total_rx_packets; + /* guarantee a trip back through this routine if there was a failure */ return failure ? budget : (int)total_rx_packets; } @@ -2694,11 +2698,13 @@ int i40e_napi_poll(struct napi_struct *napi, int budget) struct i40e_vsi *vsi = q_vector->vsi; struct i40e_ring *ring; bool tx_clean_complete = true; + bool rx_clean_complete = true; bool clean_complete = true; bool arm_wb = false; int budget_per_ring; int work_done = 0; unsigned int tx_cleaned = 0; + unsigned int rx_cleaned = 0; if (test_bit(__I40E_VSI_DOWN, vsi->state)) { napi_complete(napi); @@ -2738,13 +2744,13 @@ int i40e_napi_poll(struct napi_struct *napi, int budget) i40e_for_each_ring(ring, q_vector->rx) { int cleaned = ring->xsk_pool ? - i40e_clean_rx_irq_zc(ring, budget_per_ring) : - i40e_clean_rx_irq(ring, budget_per_ring); + i40e_clean_rx_irq_zc(ring, budget_per_ring, &rx_cleaned) : + i40e_clean_rx_irq(ring, budget_per_ring, &rx_cleaned); work_done += cleaned; /* if we clean as many as budgeted, we must not be done */ if (cleaned >= budget_per_ring) - clean_complete = false; + clean_complete = rx_clean_complete = false; } /* If work not completed, return budget and polling will return */ diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c index f98ce7e4..b1f582a0 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c @@ -378,10 +378,12 @@ static void i40e_handle_xdp_result_zc(struct i40e_ring *rx_ring, * i40e_clean_rx_irq_zc - Consumes Rx packets from the hardware ring * @rx_ring: Rx ring * @budget: NAPI budget + * @rx_cleaned: out parameter of the packets processed * * Returns amount of work completed **/ -int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget) +int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget, + unsigned int *rx_cleaned) { unsigned int total_rx_bytes = 0, total_rx_packets = 0; u16 next_to_clean = rx_ring->next_to_clean; @@ -452,6 +454,8 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget) i40e_finalize_xdp_rx(rx_ring, xdp_xmit); i40e_update_rx_stats(rx_ring, total_rx_bytes, total_rx_packets); + *rx_cleaned = total_rx_packets; + if (xsk_uses_need_wakeup(rx_ring->xsk_pool)) { if (failure || next_to_clean == rx_ring->next_to_use) xsk_set_rx_need_wakeup(rx_ring->xsk_pool); diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.h b/drivers/net/ethernet/intel/i40e/i40e_xsk.h index 396ed11..1089cc0 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.h +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.h @@ -28,7 +28,8 @@ int i40e_queue_pair_enable(struct i40e_vsi *vsi, int queue_pair); int i40e_xsk_pool_setup(struct i40e_vsi *vsi, struct xsk_buff_pool *pool, u16 qid); bool i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 cleaned_count); -int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget); +int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget, + unsigned int *rx_cleaned); bool i40e_clean_xdp_tx_irq(struct i40e_vsi *vsi, struct i40e_ring *tx_ring, unsigned int *tx_cleaned); -- 2.7.4
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