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Message-Id: <20200514083710.143394-6-bjorn.topel@gmail.com>
Date: Thu, 14 May 2020 10:37:01 +0200
From: Björn Töpel <bjorn.topel@...il.com>
To: ast@...nel.org, daniel@...earbox.net, davem@...emloft.net,
kuba@...nel.org, hawk@...nel.org, john.fastabend@...il.com,
netdev@...r.kernel.org, bpf@...r.kernel.org,
magnus.karlsson@...el.com, jonathan.lemon@...il.com,
jeffrey.t.kirsher@...el.com
Cc: Björn Töpel <bjorn.topel@...el.com>,
maximmi@...lanox.com, maciej.fijalkowski@...el.com,
intel-wired-lan@...ts.osuosl.org
Subject: [PATCH bpf-next v2 05/14] i40e: refactor rx_bi accesses
From: Björn Töpel <bjorn.topel@...el.com>
As a first step to migrate i40e to the new MEM_TYPE_XSK_BUFF_POOL
APIs, code that accesses the rx_bi (SW/shadow ring) is refactored to
use an accessor function.
Cc: intel-wired-lan@...ts.osuosl.org
Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
---
drivers/net/ethernet/intel/i40e/i40e_txrx.c | 17 +++++++++++------
drivers/net/ethernet/intel/i40e/i40e_xsk.c | 18 ++++++++++++------
2 files changed, 23 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index b8496037ef7f..58daba8fabc8 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1195,6 +1195,11 @@ static void i40e_update_itr(struct i40e_q_vector *q_vector,
rc->total_packets = 0;
}
+static struct i40e_rx_buffer *i40e_rx_bi(struct i40e_ring *rx_ring, u32 idx)
+{
+ return &rx_ring->rx_bi[idx];
+}
+
/**
* i40e_reuse_rx_page - page flip buffer and store it back on the ring
* @rx_ring: rx descriptor ring to store buffers on
@@ -1208,7 +1213,7 @@ static void i40e_reuse_rx_page(struct i40e_ring *rx_ring,
struct i40e_rx_buffer *new_buff;
u16 nta = rx_ring->next_to_alloc;
- new_buff = &rx_ring->rx_bi[nta];
+ new_buff = i40e_rx_bi(rx_ring, nta);
/* update, and store next to alloc */
nta++;
@@ -1272,7 +1277,7 @@ struct i40e_rx_buffer *i40e_clean_programming_status(
ntc = rx_ring->next_to_clean;
/* fetch, update, and store next to clean */
- rx_buffer = &rx_ring->rx_bi[ntc++];
+ rx_buffer = i40e_rx_bi(rx_ring, ntc++);
ntc = (ntc < rx_ring->count) ? ntc : 0;
rx_ring->next_to_clean = ntc;
@@ -1361,7 +1366,7 @@ void i40e_clean_rx_ring(struct i40e_ring *rx_ring)
/* Free all the Rx ring sk_buffs */
for (i = 0; i < rx_ring->count; i++) {
- struct i40e_rx_buffer *rx_bi = &rx_ring->rx_bi[i];
+ struct i40e_rx_buffer *rx_bi = i40e_rx_bi(rx_ring, i);
if (!rx_bi->page)
continue;
@@ -1576,7 +1581,7 @@ bool i40e_alloc_rx_buffers(struct i40e_ring *rx_ring, u16 cleaned_count)
return false;
rx_desc = I40E_RX_DESC(rx_ring, ntu);
- bi = &rx_ring->rx_bi[ntu];
+ bi = i40e_rx_bi(rx_ring, ntu);
do {
if (!i40e_alloc_mapped_page(rx_ring, bi))
@@ -1598,7 +1603,7 @@ bool i40e_alloc_rx_buffers(struct i40e_ring *rx_ring, u16 cleaned_count)
ntu++;
if (unlikely(ntu == rx_ring->count)) {
rx_desc = I40E_RX_DESC(rx_ring, 0);
- bi = rx_ring->rx_bi;
+ bi = i40e_rx_bi(rx_ring, 0);
ntu = 0;
}
@@ -1965,7 +1970,7 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer(struct i40e_ring *rx_ring,
{
struct i40e_rx_buffer *rx_buffer;
- rx_buffer = &rx_ring->rx_bi[rx_ring->next_to_clean];
+ rx_buffer = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
prefetchw(rx_buffer->page);
/* we are reusing so sync this buffer for CPU use */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
index 452bba7bc4ff..8d29477bb0b6 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
@@ -9,6 +9,11 @@
#include "i40e_txrx_common.h"
#include "i40e_xsk.h"
+static struct i40e_rx_buffer *i40e_rx_bi(struct i40e_ring *rx_ring, u32 idx)
+{
+ return &rx_ring->rx_bi[idx];
+}
+
/**
* i40e_xsk_umem_dma_map - DMA maps all UMEM memory for the netdev
* @vsi: Current VSI
@@ -321,7 +326,7 @@ __i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count,
bool ok = true;
rx_desc = I40E_RX_DESC(rx_ring, ntu);
- bi = &rx_ring->rx_bi[ntu];
+ bi = i40e_rx_bi(rx_ring, ntu);
do {
if (!alloc(rx_ring, bi)) {
ok = false;
@@ -340,7 +345,7 @@ __i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count,
if (unlikely(ntu == rx_ring->count)) {
rx_desc = I40E_RX_DESC(rx_ring, 0);
- bi = rx_ring->rx_bi;
+ bi = i40e_rx_bi(rx_ring, 0);
ntu = 0;
}
@@ -402,7 +407,7 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer_zc(struct i40e_ring *rx_ring,
{
struct i40e_rx_buffer *bi;
- bi = &rx_ring->rx_bi[rx_ring->next_to_clean];
+ bi = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
/* we are reusing so sync this buffer for CPU use */
dma_sync_single_range_for_cpu(rx_ring->dev,
@@ -424,7 +429,8 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer_zc(struct i40e_ring *rx_ring,
static void i40e_reuse_rx_buffer_zc(struct i40e_ring *rx_ring,
struct i40e_rx_buffer *old_bi)
{
- struct i40e_rx_buffer *new_bi = &rx_ring->rx_bi[rx_ring->next_to_alloc];
+ struct i40e_rx_buffer *new_bi = i40e_rx_bi(rx_ring,
+ rx_ring->next_to_alloc);
u16 nta = rx_ring->next_to_alloc;
/* update, and store next to alloc */
@@ -456,7 +462,7 @@ void i40e_zca_free(struct zero_copy_allocator *alloc, unsigned long handle)
mask = rx_ring->xsk_umem->chunk_mask;
nta = rx_ring->next_to_alloc;
- bi = &rx_ring->rx_bi[nta];
+ bi = i40e_rx_bi(rx_ring, nta);
nta++;
rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
@@ -824,7 +830,7 @@ void i40e_xsk_clean_rx_ring(struct i40e_ring *rx_ring)
u16 i;
for (i = 0; i < rx_ring->count; i++) {
- struct i40e_rx_buffer *rx_bi = &rx_ring->rx_bi[i];
+ struct i40e_rx_buffer *rx_bi = i40e_rx_bi(rx_ring, i);
if (!rx_bi->addr)
continue;
--
2.25.1
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