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2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/net/ethernet/toshiba/ps3_gelic_net.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *  PS3 gelic network driver.
34  *
....@@ -10,20 +11,6 @@
1011  *
1112  * Authors : Utz Bacher <utz.bacher@de.ibm.com>
1213  *           Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
13
- *
14
- * This program is free software; you can redistribute it and/or modify
15
- * it under the terms of the GNU General Public License as published by
16
- * the Free Software Foundation; either version 2, or (at your option)
17
- * any later version.
18
- *
19
- * This program is distributed in the hope that it will be useful,
20
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
21
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22
- * GNU General Public License for more details.
23
- *
24
- * You should have received a copy of the GNU General Public License
25
- * along with this program; if not, write to the Free Software
26
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
2714  */
2815 
2916 #undef DEBUG
....@@ -330,15 +317,17 @@
330317 
331318 	/* set up the hardware pointers in each descriptor */
332319 	for (i = 0; i < no; i++, descr++) {
333
-		gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
334
-		descr->bus_addr =
335
-			dma_map_single(ctodev(card), descr,
336
-				       GELIC_DESCR_SIZE,
337
-				       DMA_BIDIRECTIONAL);
320
+		dma_addr_t cpu_addr;
338321 
339
-		if (!descr->bus_addr)
322
+		gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
323
+
324
+		cpu_addr = dma_map_single(ctodev(card), descr,
325
+					  GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
326
+
327
+		if (dma_mapping_error(ctodev(card), cpu_addr))
340328 			goto iommu_error;
341329 
330
+		descr->bus_addr = cpu_to_be32(cpu_addr);
342331 		descr->next = descr + 1;
343332 		descr->prev = descr - 1;
344333 	}
....@@ -378,28 +367,28 @@
378367  *
379368  * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
380369  * Activate the descriptor state-wise
370
+ *
371
+ * Gelic RX sk_buffs must be aligned to GELIC_NET_RXBUF_ALIGN and the length
372
+ * must be a multiple of GELIC_NET_RXBUF_ALIGN.
381373  */
382374 static int gelic_descr_prepare_rx(struct gelic_card *card,
383375 				  struct gelic_descr *descr)
384376 {
377
+	static const unsigned int rx_skb_size =
378
+		ALIGN(GELIC_NET_MAX_FRAME, GELIC_NET_RXBUF_ALIGN) +
379
+		GELIC_NET_RXBUF_ALIGN - 1;
380
+	dma_addr_t cpu_addr;
385381 	int offset;
386
-	unsigned int bufsize;
387382 
388383 	if (gelic_descr_get_status(descr) !=  GELIC_DESCR_DMA_NOT_IN_USE)
389384 		dev_info(ctodev(card), "%s: ERROR status\n", __func__);
390
-	/* we need to round up the buffer size to a multiple of 128 */
391
-	bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN);
392385 
393
-	/* and we need to have it 128 byte aligned, therefore we allocate a
394
-	 * bit more */
395
-	descr->skb = dev_alloc_skb(bufsize + GELIC_NET_RXBUF_ALIGN - 1);
386
+	descr->skb = netdev_alloc_skb(*card->netdev, rx_skb_size);
396387 	if (!descr->skb) {
397388 		descr->buf_addr = 0; /* tell DMAC don't touch memory */
398
-		dev_info(ctodev(card),
399
-			 "%s:allocate skb failed !!\n", __func__);
400389 		return -ENOMEM;
401390 	}
402
-	descr->buf_size = cpu_to_be32(bufsize);
391
+	descr->buf_size = cpu_to_be32(rx_skb_size);
403392 	descr->dmac_cmd_status = 0;
404393 	descr->result_size = 0;
405394 	descr->valid_size = 0;
....@@ -410,11 +399,10 @@
410399 	if (offset)
411400 		skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
412401 	/* io-mmu-map the skb */
413
-	descr->buf_addr = cpu_to_be32(dma_map_single(ctodev(card),
414
-						     descr->skb->data,
415
-						     GELIC_NET_MAX_MTU,
416
-						     DMA_FROM_DEVICE));
417
-	if (!descr->buf_addr) {
402
+	cpu_addr = dma_map_single(ctodev(card), descr->skb->data,
403
+				  GELIC_NET_MAX_FRAME, DMA_FROM_DEVICE);
404
+	descr->buf_addr = cpu_to_be32(cpu_addr);
405
+	if (dma_mapping_error(ctodev(card), cpu_addr)) {
418406 		dev_kfree_skb_any(descr->skb);
419407 		descr->skb = NULL;
420408 		dev_info(ctodev(card),
....@@ -794,7 +782,7 @@
794782 
795783 	buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE);
796784 
797
-	if (!buf) {
785
+	if (dma_mapping_error(ctodev(card), buf)) {
798786 		dev_err(ctodev(card),
799787 			"dma map 2 failed (%p, %i). Dropping packet\n",
800788 			skb->data, skb->len);
....@@ -930,7 +918,7 @@
930918 	data_error = be32_to_cpu(descr->data_error);
931919 	/* unmap skb buffer */
932920 	dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
933
-			 GELIC_NET_MAX_MTU,
921
+			 GELIC_NET_MAX_FRAME,
934922 			 DMA_FROM_DEVICE);
935923 
936924 	skb_put(skb, be32_to_cpu(descr->valid_size)?
....@@ -1163,7 +1151,7 @@
11631151  * gelic_net_poll_controller - artificial interrupt for netconsole etc.
11641152  * @netdev: interface device structure
11651153  *
1166
- * see Documentation/networking/netconsole.txt
1154
+ * see Documentation/networking/netconsole.rst
11671155  */
11681156 void gelic_net_poll_controller(struct net_device *netdev)
11691157 {
....@@ -1418,7 +1406,7 @@
14181406  *
14191407  * called, if tx hangs. Schedules a task that resets the interface
14201408  */
1421
-void gelic_net_tx_timeout(struct net_device *netdev)
1409
+void gelic_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
14221410 {
14231411 	struct gelic_card *card;
14241412