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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 10/16] net/e1000: Improve Tx descriptor handling in e1000_transmit
Date: Wed,  6 Feb 2019 17:22:08 -0800	[thread overview]
Message-ID: <20190207012214.5060-11-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20190207012214.5060-1-andrew.smirnov@gmail.com>

Drop explicit "volatile" specifier for struct e1000_tx_desc as well as
explicit endiannes fix, by using little endian IO accessors (readl,
writel, etc.)

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 drivers/net/e1000/main.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/e1000/main.c b/drivers/net/e1000/main.c
index f7e26a0e5..866d8def3 100644
--- a/drivers/net/e1000/main.c
+++ b/drivers/net/e1000/main.c
@@ -35,6 +35,7 @@ tested on both gig copper and gig fiber boards
 #include <linux/pci.h>
 #include <dma.h>
 #include "e1000.h"
+#include <io-64-nonatomic-lo-hi.h>
 
 #define PCI_VENDOR_ID_INTEL	0x8086
 
@@ -3413,29 +3414,28 @@ static int e1000_poll(struct eth_device *edev)
 static int e1000_transmit(struct eth_device *edev, void *txpacket, int length)
 {
 	struct e1000_hw *hw = edev->priv;
-	volatile struct e1000_tx_desc *txp = &hw->tx_base[hw->tx_tail];
+	struct e1000_tx_desc *txp = &hw->tx_base[hw->tx_tail];
 	uint64_t to;
 	dma_addr_t dma;
 	int ret = 0;
 
 	hw->tx_tail = (hw->tx_tail + 1) % 8;
 
-	txp->lower.data = cpu_to_le32(hw->txd_cmd | length);
-	txp->upper.data = 0;
+	writel(hw->txd_cmd | length, &txp->lower.data);
+	writel(0, &txp->upper.data);
 
 	dma = dma_map_single(hw->dev, txpacket, length, DMA_TO_DEVICE);
 	if (dma_mapping_error(hw->dev, dma))
 		return -EFAULT;
 
-	txp->buffer_addr = cpu_to_le64(dma);
-
+	writeq(dma, &txp->buffer_addr);
 	e1000_write_reg(hw, E1000_TDT, hw->tx_tail);
 
 	e1000_write_flush(hw);
 
 	to = get_time_ns();
 	while (1) {
-		if (le32_to_cpu(txp->upper.data) & E1000_TXD_STAT_DD)
+		if (readl(&txp->upper.data) & E1000_TXD_STAT_DD)
 			break;
 		if (is_timeout(to, MSECOND)) {
 			dev_dbg(hw->dev, "e1000: tx timeout\n");
-- 
2.20.1


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  parent reply	other threads:[~2019-02-07  1:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-07  1:21 [PATCH 00/16] E1000 driver AArch64 related fixes Andrey Smirnov
2019-02-07  1:21 ` [PATCH 01/16] ARM: Select HAS_DMA for AArch64 Andrey Smirnov
2019-02-07  1:22 ` [PATCH 02/16] include: Import io-64-nonatomic-*.h from Linux Andrey Smirnov
2019-02-07  1:22 ` [PATCH 03/16] net/e1000: Don't use coherent memory for Rx buffer Andrey Smirnov
2019-02-07  1:22 ` [PATCH 04/16] net/e1000: Convert e1000_transmit to use dma_map_single() Andrey Smirnov
2019-02-07  1:22 ` [PATCH 05/16] net/e1000: Fix debug print warning Andrey Smirnov
2019-02-07  1:22 ` [PATCH 06/16] net/e1000: Fix incorrect "Rx ready" check Andrey Smirnov
2019-02-07  1:22 ` [PATCH 07/16] net/e1000: Get rid of pointer arithmetic in e1000_poll Andrey Smirnov
2019-02-07  1:22 ` [PATCH 08/16] net/e1000: Improve Rx descriptor handling in e1000_poll() Andrey Smirnov
2019-02-07  1:22 ` [PATCH 09/16] net/e1000: Remove pointer arithmetic in e1000_transmit() Andrey Smirnov
2019-02-07  1:22 ` Andrey Smirnov [this message]
2019-02-07  1:22 ` [PATCH 11/16] net/e1000: Make use of readl_poll_timeout() " Andrey Smirnov
2019-02-07  1:22 ` [PATCH 12/16] net/e1000: Rename fill_rx() to e1000_fill_rx() Andrey Smirnov
2019-02-07  1:22 ` [PATCH 13/16] net/e1000: Remove pointer arithmetic from e1000_fill_rx() Andrey Smirnov
2019-02-07  1:22 ` [PATCH 14/16] net/e1000: Consolidate next index calculation code Andrey Smirnov
2019-02-07  1:22 ` [PATCH 15/16] net/e1000: Improve RX buffer handling in e1000_fill_rx() Andrey Smirnov
2019-02-07  1:22 ` [PATCH 16/16] net/e1000: Do not hardcode TDBAH and RDBAH to 0 Andrey Smirnov
2019-02-11  7:48 ` [PATCH 00/16] E1000 driver AArch64 related fixes Sascha Hauer

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