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-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.c36
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.h19
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c83
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h1
4 files changed, 122 insertions, 17 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 665fe4fbf5d0..cda1c787e8e1 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -212,16 +212,7 @@ static bool bnxt_vf_pciid(enum board_idx idx)
#define BNXT_CP_DB_IRQ_DIS(db) \
writel(DB_CP_IRQ_DIS_FLAGS, db)
-static inline u32 bnxt_tx_avail(struct bnxt *bp, struct bnxt_tx_ring_info *txr)
-{
- /* Tell compiler to fetch tx indices from memory. */
- barrier();
-
- return bp->tx_ring_size -
- ((txr->tx_prod - txr->tx_cons) & bp->tx_ring_mask);
-}
-
-static const u16 bnxt_lhint_arr[] = {
+const u16 bnxt_lhint_arr[] = {
TX_BD_FLAGS_LHINT_512_AND_SMALLER,
TX_BD_FLAGS_LHINT_512_TO_1023,
TX_BD_FLAGS_LHINT_1024_TO_2047,
@@ -613,9 +604,8 @@ static inline u8 *__bnxt_alloc_rx_data(struct bnxt *bp, dma_addr_t *mapping,
return data;
}
-static inline int bnxt_alloc_rx_data(struct bnxt *bp,
- struct bnxt_rx_ring_info *rxr,
- u16 prod, gfp_t gfp)
+int bnxt_alloc_rx_data(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
+ u16 prod, gfp_t gfp)
{
struct rx_bd *rxbd = &rxr->rx_desc_ring[RX_RING(prod)][RX_IDX(prod)];
struct bnxt_sw_rx_bd *rx_buf = &rxr->rx_buf_ring[prod];
@@ -1766,6 +1756,18 @@ static int bnxt_poll_work(struct bnxt *bp, struct bnxt_napi *bnapi, int budget)
break;
}
+ if (event & BNXT_TX_EVENT) {
+ struct bnxt_tx_ring_info *txr = bnapi->tx_ring;
+ void __iomem *db = txr->tx_doorbell;
+ u16 prod = txr->tx_prod;
+
+ /* Sync BD data before updating doorbell */
+ wmb();
+
+ writel(DB_KEY_TX | prod, db);
+ writel(DB_KEY_TX | prod, db);
+ }
+
cpr->cp_raw_cons = raw_cons;
/* ACK completion ring before freeing tx ring and producing new
* buffers in rx/agg rings to prevent overflowing the completion
@@ -3066,12 +3068,14 @@ static int bnxt_alloc_mem(struct bnxt *bp, bool irq_re_init)
bp->tx_ring[i].bnapi = bp->bnapi[j];
bp->bnapi[j]->tx_ring = &bp->tx_ring[i];
bp->tx_ring_map[i] = bp->tx_nr_rings_xdp + i;
- if (i >= bp->tx_nr_rings_xdp)
+ if (i >= bp->tx_nr_rings_xdp) {
bp->tx_ring[i].txq_index = i -
bp->tx_nr_rings_xdp;
- else
+ bp->bnapi[j]->tx_int = bnxt_tx_int;
+ } else {
bp->bnapi[j]->flags |= BNXT_NAPI_FLAG_XDP;
- bp->bnapi[j]->tx_int = bnxt_tx_int;
+ bp->bnapi[j]->tx_int = bnxt_tx_int_xdp;
+ }
}
rc = bnxt_alloc_stats(bp);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index db4a41069b71..9f07b9cf8965 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -514,13 +514,17 @@ struct rx_tpa_end_cmp_ext {
#define BNXT_RX_EVENT 1
#define BNXT_AGG_EVENT 2
+#define BNXT_TX_EVENT 4
struct bnxt_sw_tx_bd {
struct sk_buff *skb;
DEFINE_DMA_UNMAP_ADDR(mapping);
u8 is_gso;
u8 is_push;
- unsigned short nr_frags;
+ union {
+ unsigned short nr_frags;
+ u16 rx_prod;
+ };
};
struct bnxt_sw_rx_bd {
@@ -1191,6 +1195,19 @@ struct bnxt {
#define SFF_MODULE_ID_QSFP28 0x11
#define BNXT_MAX_PHY_I2C_RESP_SIZE 64
+static inline u32 bnxt_tx_avail(struct bnxt *bp, struct bnxt_tx_ring_info *txr)
+{
+ /* Tell compiler to fetch tx indices from memory. */
+ barrier();
+
+ return bp->tx_ring_size -
+ ((txr->tx_prod - txr->tx_cons) & bp->tx_ring_mask);
+}
+
+extern const u16 bnxt_lhint_arr[];
+
+int bnxt_alloc_rx_data(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
+ u16 prod, gfp_t gfp);
void bnxt_reuse_rx_data(struct bnxt_rx_ring_info *rxr, u16 cons, void *data);
void bnxt_set_tpa_flags(struct bnxt *bp);
void bnxt_set_ring_params(struct bnxt *);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
index b822e461cbde..899c30fb5188 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
@@ -19,6 +19,65 @@
#include "bnxt.h"
#include "bnxt_xdp.h"
+static void bnxt_xmit_xdp(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
+ dma_addr_t mapping, u32 len, u16 rx_prod)
+{
+ struct bnxt_sw_tx_bd *tx_buf;
+ struct tx_bd_ext *txbd1;
+ struct tx_bd *txbd;
+ u32 flags;
+ u16 prod;
+
+ prod = txr->tx_prod;
+ tx_buf = &txr->tx_buf_ring[prod];
+ tx_buf->rx_prod = rx_prod;
+
+ txbd = &txr->tx_desc_ring[TX_RING(prod)][TX_IDX(prod)];
+ flags = (len << TX_BD_LEN_SHIFT) | TX_BD_TYPE_LONG_TX_BD |
+ (2 << TX_BD_FLAGS_BD_CNT_SHIFT) | TX_BD_FLAGS_COAL_NOW |
+ TX_BD_FLAGS_PACKET_END | bnxt_lhint_arr[len >> 9];
+ txbd->tx_bd_len_flags_type = cpu_to_le32(flags);
+ txbd->tx_bd_opaque = prod;
+ txbd->tx_bd_haddr = cpu_to_le64(mapping);
+
+ prod = NEXT_TX(prod);
+ txbd1 = (struct tx_bd_ext *)
+ &txr->tx_desc_ring[TX_RING(prod)][TX_IDX(prod)];
+
+ txbd1->tx_bd_hsize_lflags = cpu_to_le32(0);
+ txbd1->tx_bd_mss = cpu_to_le32(0);
+ txbd1->tx_bd_cfa_action = cpu_to_le32(0);
+ txbd1->tx_bd_cfa_meta = cpu_to_le32(0);
+
+ prod = NEXT_TX(prod);
+ txr->tx_prod = prod;
+}
+
+void bnxt_tx_int_xdp(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts)
+{
+ struct bnxt_tx_ring_info *txr = bnapi->tx_ring;
+ struct bnxt_rx_ring_info *rxr = bnapi->rx_ring;
+ struct bnxt_sw_tx_bd *tx_buf;
+ u16 tx_cons = txr->tx_cons;
+ u16 last_tx_cons = tx_cons;
+ u16 rx_prod;
+ int i;
+
+ for (i = 0; i < nr_pkts; i++) {
+ last_tx_cons = tx_cons;
+ tx_cons = NEXT_TX(tx_cons);
+ tx_cons = NEXT_TX(tx_cons);
+ }
+ txr->tx_cons = tx_cons;
+ if (bnxt_tx_avail(bp, txr) == bp->tx_ring_size) {
+ rx_prod = rxr->rx_prod;
+ } else {
+ tx_buf = &txr->tx_buf_ring[last_tx_cons];
+ rx_prod = tx_buf->rx_prod;
+ }
+ writel(DB_KEY_RX | rx_prod, rxr->rx_doorbell);
+}
+
/* returns the following:
* true - packet consumed by XDP and new buffer is allocated.
* false - packet should be passed to the stack.
@@ -27,11 +86,13 @@ bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
struct page *page, u8 **data_ptr, unsigned int *len, u8 *event)
{
struct bpf_prog *xdp_prog = READ_ONCE(rxr->xdp_prog);
+ struct bnxt_tx_ring_info *txr;
struct bnxt_sw_rx_bd *rx_buf;
struct pci_dev *pdev;
struct xdp_buff xdp;
dma_addr_t mapping;
void *orig_data;
+ u32 tx_avail;
u32 offset;
u32 act;
@@ -39,6 +100,7 @@ bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
return false;
pdev = bp->pdev;
+ txr = rxr->bnapi->tx_ring;
rx_buf = &rxr->rx_buf_ring[cons];
offset = bp->rx_offset;
@@ -54,6 +116,13 @@ bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
act = bpf_prog_run_xdp(xdp_prog, &xdp);
rcu_read_unlock();
+ tx_avail = bnxt_tx_avail(bp, txr);
+ /* If the tx ring is not full, we must not update the rx producer yet
+ * because we may still be transmitting on some BDs.
+ */
+ if (tx_avail != bp->tx_ring_size)
+ *event &= ~BNXT_RX_EVENT;
+
if (orig_data != xdp.data) {
offset = xdp.data - xdp.data_hard_start;
*data_ptr = xdp.data_hard_start + offset;
@@ -63,6 +132,20 @@ bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
case XDP_PASS:
return false;
+ case XDP_TX:
+ if (tx_avail < 2) {
+ trace_xdp_exception(bp->dev, xdp_prog, act);
+ bnxt_reuse_rx_data(rxr, cons, page);
+ return true;
+ }
+
+ *event = BNXT_TX_EVENT;
+ dma_sync_single_for_device(&pdev->dev, mapping + offset, *len,
+ bp->rx_dir);
+ bnxt_xmit_xdp(bp, txr, mapping + offset, *len,
+ NEXT_RX(rxr->rx_prod));
+ bnxt_reuse_rx_data(rxr, cons, page);
+ return true;
default:
bpf_warn_invalid_xdp_action(act);
/* Fall thru */
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h
index 0bb7b7d97ec3..b529f2c5355b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h
@@ -10,6 +10,7 @@
#ifndef BNXT_XDP_H
#define BNXT_XDP_H
+void bnxt_tx_int_xdp(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts);
bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
struct page *page, u8 **data_ptr, unsigned int *len,
u8 *event);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 12:22:56 +0000