From f4aa7e361ae2265ccdf2300f0a2ec531caed3f40 Mon Sep 17 00:00:00 2001 From: Daniel Machon Date: Mon, 2 Sep 2024 16:54:14 +0200 Subject: [PATCH] net: sparx5: use FDMA library for adding DCB's in the tx path MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use the fdma_dcb_add() function to add DCB's in the tx path. This gets rid of the open-coding of nextptr and dataptr handling and leaves it to the library. Also, make sure the fdma indexes are advanced using: fdma_dcb_advance(), so that the correct nextptr and dataptr offsets are retrieved. Signed-off-by: Daniel Machon Reviewed-by: Steen Hegelund Reviewed-by: Jens Emil Schulz Østergaard Reviewed-by: Horatiu Vultur Signed-off-by: David S. Miller --- .../ethernet/microchip/sparx5/sparx5_fdma.c | 39 +++++-------------- 1 file changed, 9 insertions(+), 30 deletions(-) diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c b/drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c index 8f721f7671ce7..4fc52140752a1 100644 --- a/drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c @@ -231,48 +231,27 @@ static int sparx5_fdma_napi_callback(struct napi_struct *napi, int weight) return counter; } -static struct fdma_dcb *sparx5_fdma_next_dcb(struct sparx5_tx *tx, - struct fdma_dcb *dcb) -{ - struct fdma_dcb *next_dcb; - struct fdma *fdma = &tx->fdma; - - next_dcb = dcb; - next_dcb++; - /* Handle wrap-around */ - if ((unsigned long)next_dcb >= - ((unsigned long)fdma->dcbs + fdma->n_dcbs * sizeof(*dcb))) - next_dcb = fdma->dcbs; - return next_dcb; -} - int sparx5_fdma_xmit(struct sparx5 *sparx5, u32 *ifh, struct sk_buff *skb) { struct sparx5_tx *tx = &sparx5->tx; struct fdma *fdma = &tx->fdma; static bool first_time = true; - struct fdma_dcb *next_dcb_hw; - struct fdma_db *db_hw; struct sparx5_db *db; - next_dcb_hw = sparx5_fdma_next_dcb(tx, fdma->last_dcb); - db_hw = &next_dcb_hw->db[0]; - if (!(db_hw->status & FDMA_DCB_STATUS_DONE)) + fdma_dcb_advance(fdma); + if (!fdma_db_is_done(fdma_db_get(fdma, fdma->dcb_index, 0))) return -EINVAL; db = list_first_entry(&tx->db_list, struct sparx5_db, list); - list_move_tail(&db->list, &tx->db_list); - next_dcb_hw->nextptr = FDMA_DCB_INVALID_DATA; - fdma->last_dcb->nextptr = fdma->dma + - ((unsigned long)next_dcb_hw - - (unsigned long)fdma->dcbs); - fdma->last_dcb = next_dcb_hw; memset(db->cpu_addr, 0, FDMA_XTR_BUFFER_SIZE); memcpy(db->cpu_addr, ifh, IFH_LEN * 4); memcpy(db->cpu_addr + IFH_LEN * 4, skb->data, skb->len); - db_hw->status = FDMA_DCB_STATUS_SOF | - FDMA_DCB_STATUS_EOF | - FDMA_DCB_STATUS_BLOCKO(0) | - FDMA_DCB_STATUS_BLOCKL(skb->len + IFH_LEN * 4 + 4); + + fdma_dcb_add(fdma, fdma->dcb_index, 0, + FDMA_DCB_STATUS_SOF | + FDMA_DCB_STATUS_EOF | + FDMA_DCB_STATUS_BLOCKO(0) | + FDMA_DCB_STATUS_BLOCKL(skb->len + IFH_LEN * 4 + 4)); + if (first_time) { sparx5_fdma_tx_activate(sparx5, tx); first_time = false;