blob: 1782146db6448ed27c71e626136ecb9f7939dec2 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019, Intel Corporation. */
#include <linux/bpf_trace.h>
#include <net/xdp_sock_drv.h>
#include <net/xdp.h>
#include "ice.h"
#include "ice_base.h"
#include "ice_type.h"
#include "ice_xsk.h"
#include "ice_txrx.h"
#include "ice_txrx_lib.h"
#include "ice_lib.h"
/**
* ice_qp_reset_stats - Resets all stats for rings of given index
* @vsi: VSI that contains rings of interest
* @q_idx: ring index in array
*/
static void ice_qp_reset_stats(struct ice_vsi *vsi, u16 q_idx)
{
memset(&vsi->rx_rings[q_idx]->rx_stats, 0,
sizeof(vsi->rx_rings[q_idx]->rx_stats));
memset(&vsi->tx_rings[q_idx]->stats, 0,
sizeof(vsi->tx_rings[q_idx]->stats));
if (ice_is_xdp_ena_vsi(vsi))
memset(&vsi->xdp_rings[q_idx]->stats, 0,
sizeof(vsi->xdp_rings[q_idx]->stats));
}
/**
* ice_qp_clean_rings - Cleans all the rings of a given index
* @vsi: VSI that contains rings of interest
* @q_idx: ring index in array
*/
static void ice_qp_clean_rings(struct ice_vsi *vsi, u16 q_idx)
{
ice_clean_tx_ring(vsi->tx_rings[q_idx]);
if (ice_is_xdp_ena_vsi(vsi))
ice_clean_tx_ring(vsi->xdp_rings[q_idx]);
ice_clean_rx_ring(vsi->rx_rings[q_idx]);
}
/**
* ice_qvec_toggle_napi - Enables/disables NAPI for a given q_vector
* @vsi: VSI that has netdev
* @q_vector: q_vector that has NAPI context
* @enable: true for enable, false for disable
*/
static void
ice_qvec_toggle_napi(struct ice_vsi *vsi, struct ice_q_vector *q_vector,
bool enable)
{
if (!vsi->netdev || !q_vector)
return;
if (enable)
napi_enable(&q_vector->napi);
else
napi_disable(&q_vector->napi);
}
/**
* ice_qvec_dis_irq - Mask off queue interrupt generation on given ring
* @vsi: the VSI that contains queue vector being un-configured
* @rx_ring: Rx ring that will have its IRQ disabled
* @q_vector: queue vector
*/
static void
ice_qvec_dis_irq(struct ice_vsi *vsi, struct ice_ring *rx_ring,
struct ice_q_vector *q_vector)
{
struct ice_pf *pf = vsi->back;
struct ice_hw *hw = &pf->hw;
int base = vsi->base_vector;
u16 reg;
u32 val;
/* QINT_TQCTL is being cleared in ice_vsi_stop_tx_ring, so handle
* here only QINT_RQCTL
*/
reg = rx_ring->reg_idx;
val = rd32(hw, QINT_RQCTL(reg));
val &= ~QINT_RQCTL_CAUSE_ENA_M;
wr32(hw, QINT_RQCTL(reg), val);
if (q_vector) {
u16 v_idx = q_vector->v_idx;
wr32(hw, GLINT_DYN_CTL(q_vector->reg_idx), 0);
ice_flush(hw);
synchronize_irq(pf->msix_entries[v_idx + base].vector);
}
}
/**
* ice_qvec_cfg_msix - Enable IRQ for given queue vector
* @vsi: the VSI that contains queue vector
* @q_vector: queue vector
*/
static void
ice_qvec_cfg_msix(struct ice_vsi *vsi, struct ice_q_vector *q_vector)
{
u16 reg_idx = q_vector->reg_idx;
struct ice_pf *pf = vsi->back;
struct ice_hw *hw = &pf->hw;
struct ice_ring *ring;
ice_cfg_itr(hw, q_vector);
wr32(hw, GLINT_RATE(reg_idx),
ice_intrl_usec_to_reg(q_vector->intrl, hw->intrl_gran));
ice_for_each_ring(ring, q_vector->tx)
ice_cfg_txq_interrupt(vsi, ring->reg_idx, reg_idx,
q_vector->tx.itr_idx);
ice_for_each_ring(ring, q_vector->rx)
ice_cfg_rxq_interrupt(vsi, ring->reg_idx, reg_idx,
q_vector->rx.itr_idx);
ice_flush(hw);
}
/**
* ice_qvec_ena_irq - Enable IRQ for given queue vector
* @vsi: the VSI that contains queue vector
* @q_vector: queue vector
*/
static void ice_qvec_ena_irq(struct ice_vsi *vsi, struct ice_q_vector *q_vector)
{
struct ice_pf *pf = vsi->back;
struct ice_hw *hw = &pf->hw;
ice_irq_dynamic_ena(hw, vsi, q_vector);
ice_flush(hw);
}
/**
* ice_qp_dis - Disables a queue pair
* @vsi: VSI of interest
* @q_idx: ring index in array
*
* Returns 0 on success, negative on failure.
*/
static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx)
{
struct ice_txq_meta txq_meta = { };
struct ice_ring *tx_ring, *rx_ring;
struct ice_q_vector *q_vector;
int timeout = 50;
int err;
if (q_idx >= vsi->num_rxq || q_idx >= vsi->num_txq)
return -EINVAL;
tx_ring = vsi->tx_rings[q_idx];
rx_ring = vsi->rx_rings[q_idx];
q_vector = rx_ring->q_vector;
while (test_and_set_bit(__ICE_CFG_BUSY, vsi->state)) {
timeout--;
if (!timeout)
return -EBUSY;
usleep_range(1000, 2000);
}
netif_tx_stop_queue(netdev_get_tx_queue(vsi->netdev, q_idx));
ice_qvec_dis_irq(vsi, rx_ring, q_vector);
ice_fill_txq_meta(vsi, tx_ring, &txq_meta);
err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, tx_ring, &txq_meta);
if (err)
return err;
if (ice_is_xdp_ena_vsi(vsi)) {
struct ice_ring *xdp_ring = vsi->xdp_rings[q_idx];
memset(&txq_meta, 0, sizeof(txq_meta));
ice_fill_txq_meta(vsi, xdp_ring, &txq_meta);
err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, xdp_ring,
&txq_meta);
if (err)
return err;
}
err = ice_vsi_ctrl_one_rx_ring(vsi, false, q_idx, true);
if (err)
return err;
ice_qvec_toggle_napi(vsi, q_vector, false);
ice_qp_clean_rings(vsi, q_idx);
ice_qp_reset_stats(vsi, q_idx);
return 0;
}
/**
* ice_qp_ena - Enables a queue pair
* @vsi: VSI of interest
* @q_idx: ring index in array
*
* Returns 0 on success, negative on failure.
*/
static int ice_qp_ena(struct ice_vsi *vsi, u16 q_idx)
{
struct ice_aqc_add_tx_qgrp *qg_buf;
struct ice_ring *tx_ring, *rx_ring;
struct ice_q_vector *q_vector;
u16 size;
int err;
if (q_idx >= vsi->num_rxq || q_idx >= vsi->num_txq)
return -EINVAL;
size = struct_size(qg_buf, txqs, 1);
qg_buf = kzalloc(size, GFP_KERNEL);
if (!qg_buf)
return -ENOMEM;
qg_buf->num_txqs = 1;
tx_ring = vsi->tx_rings[q_idx];
rx_ring = vsi->rx_rings[q_idx];
q_vector = rx_ring->q_vector;
err = ice_vsi_cfg_txq(vsi, tx_ring, qg_buf);
if (err)
goto free_buf;
if (ice_is_xdp_ena_vsi(vsi)) {
struct ice_ring *xdp_ring = vsi->xdp_rings[q_idx];
memset(qg_buf, 0, size);
qg_buf->num_txqs = 1;
err = ice_vsi_cfg_txq(vsi, xdp_ring, qg_buf);
if (err)
goto free_buf;
ice_set_ring_xdp(xdp_ring);
xdp_ring->xsk_pool = ice_xsk_pool(xdp_ring);
}
err = ice_setup_rx_ctx(rx_ring);
if (err)
goto free_buf;
ice_qvec_cfg_msix(vsi, q_vector);
err = ice_vsi_ctrl_one_rx_ring(vsi, true, q_idx, true);
if (err)
goto free_buf;
clear_bit(__ICE_CFG_BUSY, vsi->state);
ice_qvec_toggle_napi(vsi, q_vector, true);
ice_qvec_ena_irq(vsi, q_vector);
netif_tx_start_queue(netdev_get_tx_queue(vsi->netdev, q_idx));
free_buf:
kfree(qg_buf);
return err;
}
/**
* ice_xsk_alloc_pools - allocate a buffer pool for an XDP socket
* @vsi: VSI to allocate the buffer pool on
*
* Returns 0 on success, negative on error
*/
static int ice_xsk_alloc_pools(struct ice_vsi *vsi)
{
if (vsi->xsk_pools)
return 0;
vsi->xsk_pools = kcalloc(vsi->num_xsk_pools, sizeof(*vsi->xsk_pools),
GFP_KERNEL);
if (!vsi->xsk_pools) {
vsi->num_xsk_pools = 0;
return -ENOMEM;
}
return 0;
}
/**
* ice_xsk_remove_pool - Remove an buffer pool for a certain ring/qid
* @vsi: VSI from which the VSI will be removed
* @qid: Ring/qid associated with the buffer pool
*/
static void ice_xsk_remove_pool(struct ice_vsi *vsi, u16 qid)
{
vsi->xsk_pools[qid] = NULL;
vsi->num_xsk_pools_used--;
if (vsi->num_xsk_pools_used == 0) {
kfree(vsi->xsk_pools);
vsi->xsk_pools = NULL;
vsi->num_xsk_pools = 0;
}
}
/**
* ice_xsk_pool_disable - disable a buffer pool region
* @vsi: Current VSI
* @qid: queue ID
*
* Returns 0 on success, negative on failure
*/
static int ice_xsk_pool_disable(struct ice_vsi *vsi, u16 qid)
{
if (!vsi->xsk_pools || qid >= vsi->num_xsk_pools ||
!vsi->xsk_pools[qid])
return -EINVAL;
xsk_pool_dma_unmap(vsi->xsk_pools[qid], ICE_RX_DMA_ATTR);
ice_xsk_remove_pool(vsi, qid);
return 0;
}
/**
* ice_xsk_pool_enable - enable a buffer pool region
* @vsi: Current VSI
* @pool: pointer to a requested buffer pool region
* @qid: queue ID
*
* Returns 0 on success, negative on failure
*/
static int
ice_xsk_pool_enable(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid)
{
int err;
if (vsi->type != ICE_VSI_PF)
return -EINVAL;
if (!vsi->num_xsk_pools)
vsi->num_xsk_pools = min_t(u16, vsi->num_rxq, vsi->num_txq);
if (qid >= vsi->num_xsk_pools)
return -EINVAL;
err = ice_xsk_alloc_pools(vsi);
if (err)
return err;
if (vsi->xsk_pools && vsi->xsk_pools[qid])
return -EBUSY;
vsi->xsk_pools[qid] = pool;
vsi->num_xsk_pools_used++;
err = xsk_pool_dma_map(vsi->xsk_pools[qid], ice_pf_to_dev(vsi->back),
ICE_RX_DMA_ATTR);
if (err)
return err;
return 0;
}
/**
* ice_xsk_pool_setup - enable/disable a buffer pool region depending on its state
* @vsi: Current VSI
* @pool: buffer pool to enable/associate to a ring, NULL to disable
* @qid: queue ID
*
* Returns 0 on success, negative on failure
*/
int ice_xsk_pool_setup(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid)
{
bool if_running, pool_present = !!pool;
int ret = 0, pool_failure = 0;
if_running = netif_running(vsi->netdev) && ice_is_xdp_ena_vsi(vsi);
if (if_running) {
ret = ice_qp_dis(vsi, qid);
if (ret) {
netdev_err(vsi->netdev, "ice_qp_dis error = %d\n", ret);
goto xsk_pool_if_up;
}
}
pool_failure = pool_present ? ice_xsk_pool_enable(vsi, pool, qid) :
ice_xsk_pool_disable(vsi, qid);
xsk_pool_if_up:
if (if_running) {
ret = ice_qp_ena(vsi, qid);
if (!ret && pool_present)
napi_schedule(&vsi->xdp_rings[qid]->q_vector->napi);
else if (ret)
netdev_err(vsi->netdev, "ice_qp_ena error = %d\n", ret);
}
if (pool_failure) {
netdev_err(vsi->netdev, "Could not %sable buffer pool, error = %d\n",
pool_present ? "en" : "dis", pool_failure);
return pool_failure;
}
return ret;
}
/**
* ice_alloc_rx_bufs_zc - allocate a number of Rx buffers
* @rx_ring: Rx ring
* @count: The number of buffers to allocate
*
* This function allocates a number of Rx buffers from the fill ring
* or the internal recycle mechanism and places them on the Rx ring.
*
* Returns false if all allocations were successful, true if any fail.
*/
bool ice_alloc_rx_bufs_zc(struct ice_ring *rx_ring, u16 count)
{
union ice_32b_rx_flex_desc *rx_desc;
u16 ntu = rx_ring->next_to_use;
struct ice_rx_buf *rx_buf;
bool ret = false;
dma_addr_t dma;
if (!count)
return false;
rx_desc = ICE_RX_DESC(rx_ring, ntu);
rx_buf = &rx_ring->rx_buf[ntu];
do {
rx_buf->xdp = xsk_buff_alloc(rx_ring->xsk_pool);
if (!rx_buf->xdp) {
ret = true;
break;
}
dma = xsk_buff_xdp_get_dma(rx_buf->xdp);
rx_desc->read.pkt_addr = cpu_to_le64(dma);
rx_desc->wb.status_error0 = 0;
rx_desc++;
rx_buf++;
ntu++;
if (unlikely(ntu == rx_ring->count)) {
rx_desc = ICE_RX_DESC(rx_ring, 0);
rx_buf = rx_ring->rx_buf;
ntu = 0;
}
} while (--count);
if (rx_ring->next_to_use != ntu) {
/* clear the status bits for the next_to_use descriptor */
rx_desc->wb.status_error0 = 0;
ice_release_rx_desc(rx_ring, ntu);
}
return ret;
}
/**
* ice_bump_ntc - Bump the next_to_clean counter of an Rx ring
* @rx_ring: Rx ring
*/
static void ice_bump_ntc(struct ice_ring *rx_ring)
{
int ntc = rx_ring->next_to_clean + 1;
ntc = (ntc < rx_ring->count) ? ntc : 0;
rx_ring->next_to_clean = ntc;
prefetch(ICE_RX_DESC(rx_ring, ntc));
}
/**
* ice_construct_skb_zc - Create an sk_buff from zero-copy buffer
* @rx_ring: Rx ring
* @rx_buf: zero-copy Rx buffer
*
* This function allocates a new skb from a zero-copy Rx buffer.
*
* Returns the skb on success, NULL on failure.
*/
static struct sk_buff *
ice_construct_skb_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf)
{
unsigned int metasize = rx_buf->xdp->data - rx_buf->xdp->data_meta;
unsigned int datasize = rx_buf->xdp->data_end - rx_buf->xdp->data;
unsigned int datasize_hard = rx_buf->xdp->data_end -
rx_buf->xdp->data_hard_start;
struct sk_buff *skb;
skb = __napi_alloc_skb(&rx_ring->q_vector->napi, datasize_hard,
GFP_ATOMIC | __GFP_NOWARN);
if (unlikely(!skb))
return NULL;
skb_reserve(skb, rx_buf->xdp->data - rx_buf->xdp->data_hard_start);
memcpy(__skb_put(skb, datasize), rx_buf->xdp->data, datasize);
if (metasize)
skb_metadata_set(skb, metasize);
xsk_buff_free(rx_buf->xdp);
rx_buf->xdp = NULL;
return skb;
}
/**
* ice_run_xdp_zc - Executes an XDP program in zero-copy path
* @rx_ring: Rx ring
* @xdp: xdp_buff used as input to the XDP program
*
* Returns any of ICE_XDP_{PASS, CONSUMED, TX, REDIR}
*/
static int
ice_run_xdp_zc(struct ice_ring *rx_ring, struct xdp_buff *xdp)
{
int err, result = ICE_XDP_PASS;
struct bpf_prog *xdp_prog;
struct ice_ring *xdp_ring;
u32 act;
rcu_read_lock();
xdp_prog = READ_ONCE(rx_ring->xdp_prog);
if (!xdp_prog) {
rcu_read_unlock();
return ICE_XDP_PASS;
}
act = bpf_prog_run_xdp(xdp_prog, xdp);
switch (act) {
case XDP_PASS:
break;
case XDP_TX:
xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->q_index];
result = ice_xmit_xdp_buff(xdp, xdp_ring);
break;
case XDP_REDIRECT:
err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
result = !err ? ICE_XDP_REDIR : ICE_XDP_CONSUMED;
break;
default:
bpf_warn_invalid_xdp_action(act);
fallthrough;
case XDP_ABORTED:
trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
fallthrough;
case XDP_DROP:
result = ICE_XDP_CONSUMED;
break;
}
rcu_read_unlock();
return result;
}
/**
* ice_clean_rx_irq_zc - consumes packets from the hardware ring
* @rx_ring: AF_XDP Rx ring
* @budget: NAPI budget
*
* Returns number of processed packets on success, remaining budget on failure.
*/
int ice_clean_rx_irq_zc(struct ice_ring *rx_ring, int budget)
{
unsigned int total_rx_bytes = 0, total_rx_packets = 0;
u16 cleaned_count = ICE_DESC_UNUSED(rx_ring);
unsigned int xdp_xmit = 0;
bool failure = false;
while (likely(total_rx_packets < (unsigned int)budget)) {
union ice_32b_rx_flex_desc *rx_desc;
unsigned int size, xdp_res = 0;
struct ice_rx_buf *rx_buf;
struct sk_buff *skb;
u16 stat_err_bits;
u16 vlan_tag = 0;
u8 rx_ptype;
rx_desc = ICE_RX_DESC(rx_ring, rx_ring->next_to_clean);
stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_DD_S);
if (!ice_test_staterr(rx_desc, stat_err_bits))
break;
/* This memory barrier is needed to keep us from reading
* any other fields out of the rx_desc until we have
* verified the descriptor has been written back.
*/
dma_rmb();
size = le16_to_cpu(rx_desc->wb.pkt_len) &
ICE_RX_FLX_DESC_PKT_LEN_M;
if (!size)
break;
rx_buf = &rx_ring->rx_buf[rx_ring->next_to_clean];
rx_buf->xdp->data_end = rx_buf->xdp->data + size;
xsk_buff_dma_sync_for_cpu(rx_buf->xdp, rx_ring->xsk_pool);
xdp_res = ice_run_xdp_zc(rx_ring, rx_buf->xdp);
if (xdp_res) {
if (xdp_res & (ICE_XDP_TX | ICE_XDP_REDIR))
xdp_xmit |= xdp_res;
else
xsk_buff_free(rx_buf->xdp);
rx_buf->xdp = NULL;
total_rx_bytes += size;
total_rx_packets++;
cleaned_count++;
ice_bump_ntc(rx_ring);
continue;
}
/* XDP_PASS path */
skb = ice_construct_skb_zc(rx_ring, rx_buf);
if (!skb) {
rx_ring->rx_stats.alloc_buf_failed++;
break;
}
cleaned_count++;
ice_bump_ntc(rx_ring);
if (eth_skb_pad(skb)) {
skb = NULL;
continue;
}
total_rx_bytes += skb->len;
total_rx_packets++;
stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_L2TAG1P_S);
if (ice_test_staterr(rx_desc, stat_err_bits))
vlan_tag = le16_to_cpu(rx_desc->wb.l2tag1);
rx_ptype = le16_to_cpu(rx_desc->wb.ptype_flex_flags0) &
ICE_RX_FLEX_DESC_PTYPE_M;
ice_process_skb_fields(rx_ring, rx_desc, skb, rx_ptype);
ice_receive_skb(rx_ring, skb, vlan_tag);
}
if (cleaned_count >= ICE_RX_BUF_WRITE)
failure = !ice_alloc_rx_bufs_zc(rx_ring, cleaned_count);
ice_finalize_xdp_rx(rx_ring, xdp_xmit);
ice_update_rx_ring_stats(rx_ring, total_rx_packets, total_rx_bytes);
if (xsk_uses_need_wakeup(rx_ring->xsk_pool)) {
if (failure || rx_ring->next_to_clean == rx_ring->next_to_use)
xsk_set_rx_need_wakeup(rx_ring->xsk_pool);
else
xsk_clear_rx_need_wakeup(rx_ring->xsk_pool);
return (int)total_rx_packets;
}
return failure ? budget : (int)total_rx_packets;
}
/**
* ice_xmit_zc - Completes AF_XDP entries, and cleans XDP entries
* @xdp_ring: XDP Tx ring
* @budget: max number of frames to xmit
*
* Returns true if cleanup/transmission is done.
*/
static bool ice_xmit_zc(struct ice_ring *xdp_ring, int budget)
{
struct ice_tx_desc *tx_desc = NULL;
bool work_done = true;
struct xdp_desc desc;
dma_addr_t dma;
while (likely(budget-- > 0)) {
struct ice_tx_buf *tx_buf;
if (unlikely(!ICE_DESC_UNUSED(xdp_ring))) {
xdp_ring->tx_stats.tx_busy++;
work_done = false;
break;
}
tx_buf = &xdp_ring->tx_buf[xdp_ring->next_to_use];
if (!xsk_tx_peek_desc(xdp_ring->xsk_pool, &desc))
break;
dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc.addr);
xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma,
desc.len);
tx_buf->bytecount = desc.len;
tx_desc = ICE_TX_DESC(xdp_ring, xdp_ring->next_to_use);
tx_desc->buf_addr = cpu_to_le64(dma);
tx_desc->cmd_type_offset_bsz =
ice_build_ctob(ICE_TXD_LAST_DESC_CMD, 0, desc.len, 0);
xdp_ring->next_to_use++;
if (xdp_ring->next_to_use == xdp_ring->count)
xdp_ring->next_to_use = 0;
}
if (tx_desc) {
ice_xdp_ring_update_tail(xdp_ring);
xsk_tx_release(xdp_ring->xsk_pool);
}
return budget > 0 && work_done;
}
/**
* ice_clean_xdp_tx_buf - Free and unmap XDP Tx buffer
* @xdp_ring: XDP Tx ring
* @tx_buf: Tx buffer to clean
*/
static void
ice_clean_xdp_tx_buf(struct ice_ring *xdp_ring, struct ice_tx_buf *tx_buf)
{
xdp_return_frame((struct xdp_frame *)tx_buf->raw_buf);
dma_unmap_single(xdp_ring->dev, dma_unmap_addr(tx_buf, dma),
dma_unmap_len(tx_buf, len), DMA_TO_DEVICE);
dma_unmap_len_set(tx_buf, len, 0);
}
/**
* ice_clean_tx_irq_zc - Completes AF_XDP entries, and cleans XDP entries
* @xdp_ring: XDP Tx ring
* @budget: NAPI budget
*
* Returns true if cleanup/tranmission is done.
*/
bool ice_clean_tx_irq_zc(struct ice_ring *xdp_ring, int budget)
{
int total_packets = 0, total_bytes = 0;
s16 ntc = xdp_ring->next_to_clean;
struct ice_tx_desc *tx_desc;
struct ice_tx_buf *tx_buf;
u32 xsk_frames = 0;
bool xmit_done;
tx_desc = ICE_TX_DESC(xdp_ring, ntc);
tx_buf = &xdp_ring->tx_buf[ntc];
ntc -= xdp_ring->count;
do {
if (!(tx_desc->cmd_type_offset_bsz &
cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE)))
break;
total_bytes += tx_buf->bytecount;
total_packets++;
if (tx_buf->raw_buf) {
ice_clean_xdp_tx_buf(xdp_ring, tx_buf);
tx_buf->raw_buf = NULL;
} else {
xsk_frames++;
}
tx_desc->cmd_type_offset_bsz = 0;
tx_buf++;
tx_desc++;
ntc++;
if (unlikely(!ntc)) {
ntc -= xdp_ring->count;
tx_buf = xdp_ring->tx_buf;
tx_desc = ICE_TX_DESC(xdp_ring, 0);
}
prefetch(tx_desc);
} while (likely(--budget));
ntc += xdp_ring->count;
xdp_ring->next_to_clean = ntc;
if (xsk_frames)
xsk_tx_completed(xdp_ring->xsk_pool, xsk_frames);
if (xsk_uses_need_wakeup(xdp_ring->xsk_pool))
xsk_set_tx_need_wakeup(xdp_ring->xsk_pool);
ice_update_tx_ring_stats(xdp_ring, total_packets, total_bytes);
xmit_done = ice_xmit_zc(xdp_ring, ICE_DFLT_IRQ_WORK);
return budget > 0 && xmit_done;
}
/**
* ice_xsk_wakeup - Implements ndo_xsk_wakeup
* @netdev: net_device
* @queue_id: queue to wake up
* @flags: ignored in our case, since we have Rx and Tx in the same NAPI
*
* Returns negative on error, zero otherwise.
*/
int
ice_xsk_wakeup(struct net_device *netdev, u32 queue_id,
u32 __always_unused flags)
{
struct ice_netdev_priv *np = netdev_priv(netdev);
struct ice_q_vector *q_vector;
struct ice_vsi *vsi = np->vsi;
struct ice_ring *ring;
if (test_bit(__ICE_DOWN, vsi->state))
return -ENETDOWN;
if (!ice_is_xdp_ena_vsi(vsi))
return -ENXIO;
if (queue_id >= vsi->num_txq)
return -ENXIO;
if (!vsi->xdp_rings[queue_id]->xsk_pool)
return -ENXIO;
ring = vsi->xdp_rings[queue_id];
/* The idea here is that if NAPI is running, mark a miss, so
* it will run again. If not, trigger an interrupt and
* schedule the NAPI from interrupt context. If NAPI would be
* scheduled here, the interrupt affinity would not be
* honored.
*/
q_vector = ring->q_vector;
if (!napi_if_scheduled_mark_missed(&q_vector->napi))
ice_trigger_sw_intr(&vsi->back->hw, q_vector);
return 0;
}
/**
* ice_xsk_any_rx_ring_ena - Checks if Rx rings have AF_XDP buff pool attached
* @vsi: VSI to be checked
*
* Returns true if any of the Rx rings has an AF_XDP buff pool attached
*/
bool ice_xsk_any_rx_ring_ena(struct ice_vsi *vsi)
{
int i;
if (!vsi->xsk_pools)
return false;
for (i = 0; i < vsi->num_xsk_pools; i++) {
if (vsi->xsk_pools[i])
return true;
}
return false;
}
/**
* ice_xsk_clean_rx_ring - clean buffer pool queues connected to a given Rx ring
* @rx_ring: ring to be cleaned
*/
void ice_xsk_clean_rx_ring(struct ice_ring *rx_ring)
{
u16 i;
for (i = 0; i < rx_ring->count; i++) {
struct ice_rx_buf *rx_buf = &rx_ring->rx_buf[i];
if (!rx_buf->xdp)
continue;
rx_buf->xdp = NULL;
}
}
/**
* ice_xsk_clean_xdp_ring - Clean the XDP Tx ring and its buffer pool queues
* @xdp_ring: XDP_Tx ring
*/
void ice_xsk_clean_xdp_ring(struct ice_ring *xdp_ring)
{
u16 ntc = xdp_ring->next_to_clean, ntu = xdp_ring->next_to_use;
u32 xsk_frames = 0;
while (ntc != ntu) {
struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[ntc];
if (tx_buf->raw_buf)
ice_clean_xdp_tx_buf(xdp_ring, tx_buf);
else
xsk_frames++;
tx_buf->raw_buf = NULL;
ntc++;
if (ntc >= xdp_ring->count)
ntc = 0;
}
if (xsk_frames)
xsk_tx_completed(xdp_ring->xsk_pool, xsk_frames);
}