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linux/drivers/net/ethernet/pensando/ionic/ionic_txrx.h

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ionic: Add Tx and Rx handling Add both the Tx and Rx queue setup and handling. The related stats display comes later. Instead of using the generic napi routines used by the slow-path commands, the Tx and Rx paths are simplified and inlined in one file in order to get better compiler optimizations. Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-09-03 15:28:17 -07:00
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
#ifndef _IONIC_TXRX_H_
#define _IONIC_TXRX_H_
ionic: Allow XDP program to be hot swapped Using examples of other driver(s), add the ability to hot-swap an XDP program without having to reconfigure the queues. To prevent the q->xdp_prog to be read/written more than once use READ_ONCE() and WRITE_ONCE() on the q->xdp_prog. The q->xdp_prog was being checked in multiple different for loops in the hot path. The change to allow xdp_prog hot swapping created the possibility for many READ_ONCE(q->xdp_prog) calls during a single napi callback. Refactor the Rx napi handling to allow a previous READ_ONCE(q->xdp_prog) (or NULL for hwstamp_rxq) to be passed into the relevant functions. Also, move other Rx related hotpath handling into the newly created ionic_rx_cq_service() function to reduce the scope of the xdp_prog local variable and put all Rx handling in one function similar to Tx. Signed-off-by: Brett Creeley <brett.creeley@amd.com> Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Link: https://patch.msgid.link/20240906232623.39651-8-brett.creeley@amd.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-06 16:26:23 -07:00
struct bpf_prog;
ionic: Add Tx and Rx handling Add both the Tx and Rx queue setup and handling. The related stats display comes later. Instead of using the generic napi routines used by the slow-path commands, the Tx and Rx paths are simplified and inlined in one file in order to get better compiler optimizations. Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-09-03 15:28:17 -07:00
void ionic_tx_flush(struct ionic_cq *cq);
ionic: Allow XDP program to be hot swapped Using examples of other driver(s), add the ability to hot-swap an XDP program without having to reconfigure the queues. To prevent the q->xdp_prog to be read/written more than once use READ_ONCE() and WRITE_ONCE() on the q->xdp_prog. The q->xdp_prog was being checked in multiple different for loops in the hot path. The change to allow xdp_prog hot swapping created the possibility for many READ_ONCE(q->xdp_prog) calls during a single napi callback. Refactor the Rx napi handling to allow a previous READ_ONCE(q->xdp_prog) (or NULL for hwstamp_rxq) to be passed into the relevant functions. Also, move other Rx related hotpath handling into the newly created ionic_rx_cq_service() function to reduce the scope of the xdp_prog local variable and put all Rx handling in one function similar to Tx. Signed-off-by: Brett Creeley <brett.creeley@amd.com> Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Link: https://patch.msgid.link/20240906232623.39651-8-brett.creeley@amd.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-06 16:26:23 -07:00
void ionic_rx_fill(struct ionic_queue *q, struct bpf_prog *xdp_prog);
ionic: Add Tx and Rx handling Add both the Tx and Rx queue setup and handling. The related stats display comes later. Instead of using the generic napi routines used by the slow-path commands, the Tx and Rx paths are simplified and inlined in one file in order to get better compiler optimizations. Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-09-03 15:28:17 -07:00
void ionic_rx_empty(struct ionic_queue *q);
ionic: clean tx queue of unfinished requests Clean out tx requests that didn't get finished before shutting down the queue. Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-27 20:14:45 -07:00
void ionic_tx_empty(struct ionic_queue *q);
ionic: Add Tx and Rx handling Add both the Tx and Rx queue setup and handling. The related stats display comes later. Instead of using the generic napi routines used by the slow-path commands, the Tx and Rx paths are simplified and inlined in one file in order to get better compiler optimizations. Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-09-03 15:28:17 -07:00
int ionic_rx_napi(struct napi_struct *napi, int budget);
ionic: separate interrupt for Tx and Rx Add the capability to split the Tx queues onto their own interrupts with their own napi contexts. This gives the opportunity for more direct control of Tx interrupt handling, such as CPU affinity and interrupt coalescing, useful for some traffic loads. v2: use ethtool -L, not a vendor specific priv-flag v3: simplify logging, drop unnecessary "no-change" tests Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-31 13:15:36 -07:00
int ionic_tx_napi(struct napi_struct *napi, int budget);
int ionic_txrx_napi(struct napi_struct *napi, int budget);
ionic: Add Tx and Rx handling Add both the Tx and Rx queue setup and handling. The related stats display comes later. Instead of using the generic napi routines used by the slow-path commands, the Tx and Rx paths are simplified and inlined in one file in order to get better compiler optimizations. Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-09-03 15:28:17 -07:00
netdev_tx_t ionic_start_xmit(struct sk_buff *skb, struct net_device *netdev);
ionic: remove the cq_info to save more memory With a little simple math we don't need another struct array to find the completion structs, so we can remove the ionic_cq_info altogether. This doesn't really save anything in the ionic_cq since it gets padded out to the cacheline, but it does remove the parallel array allocation of 8 * num_descriptors, or about 8 Kbytes per queue in a default configuration. Suggested-by: Neel Patel <npatel2@amd.com> Reviewed-by: Brett Creeley <brett.creeley@amd.com> Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2024-03-06 15:29:50 -08:00
bool ionic_rx_service(struct ionic_cq *cq);
ionic: add and enable tx and rx timestamp handling The Tx and Rx timestamped packets are handled through separate queues. Here we set them up, service them, and tear them down along with the normal Tx and Rx queues. Signed-off-by: Allen Hubbe <allenbh@pensando.io> Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-01 10:56:07 -07:00
ionic: add ndo_xdp_xmit When our ndo_xdp_xmit is called we mark the buffer with XDP_REDIRECT so we know to return it to the XDP stack for cleaning. Co-developed-by: Brett Creeley <brett.creeley@amd.com> Signed-off-by: Brett Creeley <brett.creeley@amd.com> Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2024-02-14 09:59:08 -08:00
int ionic_xdp_xmit(struct net_device *netdev, int n, struct xdp_frame **xdp, u32 flags);
ionic: Add Tx and Rx handling Add both the Tx and Rx queue setup and handling. The related stats display comes later. Instead of using the generic napi routines used by the slow-path commands, the Tx and Rx paths are simplified and inlined in one file in order to get better compiler optimizations. Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-09-03 15:28:17 -07:00
#endif /* _IONIC_TXRX_H_ */
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