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Message-ID: <20240905-fdma-lan966x-v1-5-e083f8620165@microchip.com>
Date: Thu, 5 Sep 2024 10:06:33 +0200
From: Daniel Machon <daniel.machon@...rochip.com>
To: Horatiu Vultur <horatiu.vultur@...rochip.com>,
<UNGLinuxDriver@...rochip.com>, "David S. Miller" <davem@...emloft.net>,
"Eric Dumazet" <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo
Abeni <pabeni@...hat.com>, Alexei Starovoitov <ast@...nel.org>, Daniel
Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>,
"John Fastabend" <john.fastabend@...il.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<bpf@...r.kernel.org>
Subject: [PATCH net-next 05/12] net: lan966x: use FDMA library for adding
DCB's in the rx path
Use the fdma_dcb_add() function to add DCB's in the rx path. This gets
rid of the open-coding of nextptr and dataptr handling and the functions
for adding DCB's.
Signed-off-by: Daniel Machon <daniel.machon@...rochip.com>
Reviewed-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
.../net/ethernet/microchip/lan966x/lan966x_fdma.c | 54 ++--------------------
1 file changed, 5 insertions(+), 49 deletions(-)
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
index 99d09c97737e..b85b15ca2052 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
@@ -28,20 +28,6 @@ static int lan966x_fdma_channel_active(struct lan966x *lan966x)
return lan_rd(lan966x, FDMA_CH_ACTIVE);
}
-static struct page *lan966x_fdma_rx_alloc_page(struct lan966x_rx *rx,
- struct fdma_db *db)
-{
- struct page *page;
-
- page = page_pool_dev_alloc_pages(rx->page_pool);
- if (unlikely(!page))
- return NULL;
-
- db->dataptr = page_pool_get_dma_addr(page) + XDP_PACKET_HEADROOM;
-
- return page;
-}
-
static void lan966x_fdma_rx_free_pages(struct lan966x_rx *rx)
{
struct fdma *fdma = &rx->fdma;
@@ -66,26 +52,6 @@ static void lan966x_fdma_rx_free_page(struct lan966x_rx *rx)
page_pool_recycle_direct(rx->page_pool, page);
}
-static void lan966x_fdma_rx_add_dcb(struct lan966x_rx *rx,
- struct fdma_dcb *dcb,
- u64 nextptr)
-{
- struct fdma *fdma = &rx->fdma;
- struct fdma_db *db;
- int i;
-
- for (i = 0; i < fdma->n_dbs; ++i) {
- db = &dcb->db[i];
- db->status = FDMA_DCB_STATUS_INTR;
- }
-
- dcb->nextptr = FDMA_DCB_INVALID_DATA;
- dcb->info = FDMA_DCB_INFO_DATAL(PAGE_SIZE << rx->page_order);
-
- fdma->last_dcb->nextptr = nextptr;
- fdma->last_dcb = dcb;
-}
-
static int lan966x_fdma_rx_alloc_page_pool(struct lan966x_rx *rx)
{
struct lan966x *lan966x = rx->lan966x;
@@ -551,15 +517,11 @@ static int lan966x_fdma_napi_poll(struct napi_struct *napi, int weight)
{
struct lan966x *lan966x = container_of(napi, struct lan966x, napi);
struct lan966x_rx *rx = &lan966x->rx;
+ int old_dcb, dcb_reload, counter = 0;
struct fdma *fdma = &rx->fdma;
- int dcb_reload, counter = 0;
- struct fdma_dcb *old_dcb;
bool redirect = false;
struct sk_buff *skb;
- struct fdma_db *db;
- struct page *page;
u64 src_port;
- u64 nextptr;
dcb_reload = fdma->dcb_index;
@@ -602,19 +564,13 @@ static int lan966x_fdma_napi_poll(struct napi_struct *napi, int weight)
allocate_new:
/* Allocate new pages and map them */
while (dcb_reload != fdma->dcb_index) {
- db = &fdma->dcbs[dcb_reload].db[fdma->db_index];
- page = lan966x_fdma_rx_alloc_page(rx, db);
- if (unlikely(!page))
- break;
- rx->page[dcb_reload][fdma->db_index] = page;
-
- old_dcb = &fdma->dcbs[dcb_reload];
+ old_dcb = dcb_reload;
dcb_reload++;
dcb_reload &= fdma->n_dcbs - 1;
- nextptr = fdma->dma + ((unsigned long)old_dcb -
- (unsigned long)fdma->dcbs);
- lan966x_fdma_rx_add_dcb(rx, old_dcb, nextptr);
+ fdma_dcb_add(fdma, old_dcb, FDMA_DCB_INFO_DATAL(fdma->db_size),
+ FDMA_DCB_STATUS_INTR);
+
lan966x_fdma_rx_reload(rx);
}
--
2.34.1
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