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hc
2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/dma/nbpfaxi.c
....@@ -1,10 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * Copyright (C) 2013-2014 Renesas Electronics Europe Ltd.
34  * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
4
- *
5
- * This program is free software; you can redistribute it and/or modify
6
- * it under the terms of version 2 of the GNU General Public License as
7
- * published by the Free Software Foundation.
85  */
96 
107 #include <linux/bitmap.h>
....@@ -147,6 +144,7 @@
147144  * @async_tx:	dmaengine object
148145  * @user_wait:	waiting for a user ack
149146  * @length:	total transfer length
147
+ * @chan:	associated DMAC channel
150148  * @sg:		list of hardware descriptors, represented by struct nbpf_link_desc
151149  * @node:	member in channel descriptor lists
152150  */
....@@ -177,13 +175,17 @@
177175 /**
178176  * struct nbpf_channel - one DMAC channel
179177  * @dma_chan:	standard dmaengine channel object
178
+ * @tasklet:	channel specific tasklet used for callbacks
180179  * @base:	register address base
181180  * @nbpf:	DMAC
182181  * @name:	IRQ name
183182  * @irq:	IRQ number
184
- * @slave_addr:	address for slave DMA
185
- * @slave_width:slave data size in bytes
186
- * @slave_burst:maximum slave burst size in bytes
183
+ * @slave_src_addr:	source address for slave DMA
184
+ * @slave_src_width:	source slave data size in bytes
185
+ * @slave_src_burst:	maximum source slave burst size in bytes
186
+ * @slave_dst_addr:	destination address for slave DMA
187
+ * @slave_dst_width:	destination slave data size in bytes
188
+ * @slave_dst_burst:	maximum destination slave burst size in bytes
187189  * @terminal:	DMA terminal, assigned to this channel
188190  * @dmarq_cfg:	DMA request line configuration - high / low, edge / level for NBPF_CHAN_CFG
189191  * @flags:	configuration flags from DT
....@@ -194,6 +196,8 @@
194196  * @active:	list of descriptors, scheduled for processing
195197  * @done:	list of completed descriptors, waiting post-processing
196198  * @desc_page:	list of additionally allocated descriptor pages - if any
199
+ * @running:	linked descriptor of running transaction
200
+ * @paused:	are translations on this channel paused?
197201  */
198202 struct nbpf_channel {
199203 	struct dma_chan dma_chan;
....@@ -479,7 +483,7 @@
479483 
480484 	default:
481485 		pr_warn("%s(): invalid bus width %u\n", __func__, width);
482
-		/* fall through */
486
+		fallthrough;
483487 	case DMA_SLAVE_BUSWIDTH_1_BYTE:
484488 		size = burst;
485489 	}
....@@ -1095,8 +1099,8 @@
10951099 	if (!dchan)
10961100 		return NULL;
10971101 
1098
-	dev_dbg(dchan->device->dev, "Entry %s(%s)\n", __func__,
1099
-		dma_spec->np->name);
1102
+	dev_dbg(dchan->device->dev, "Entry %s(%pOFn)\n", __func__,
1103
+		dma_spec->np);
11001104 
11011105 	chan = nbpf_to_chan(dchan);
11021106 
....@@ -1109,9 +1113,9 @@
11091113 	return dchan;
11101114 }
11111115 
1112
-static void nbpf_chan_tasklet(unsigned long data)
1116
+static void nbpf_chan_tasklet(struct tasklet_struct *t)
11131117 {
1114
-	struct nbpf_channel *chan = (struct nbpf_channel *)data;
1118
+	struct nbpf_channel *chan = from_tasklet(chan, t, tasklet);
11151119 	struct nbpf_desc *desc, *tmp;
11161120 	struct dmaengine_desc_callback cb;
11171121 
....@@ -1256,7 +1260,7 @@
12561260 
12571261 	snprintf(chan->name, sizeof(chan->name), "nbpf %d", n);
12581262 
1259
-	tasklet_init(&chan->tasklet, nbpf_chan_tasklet, (unsigned long)chan);
1263
+	tasklet_setup(&chan->tasklet, nbpf_chan_tasklet);
12601264 	ret = devm_request_irq(dma_dev->dev, chan->irq,
12611265 			nbpf_chan_irq, IRQF_SHARED,
12621266 			chan->name, chan);
....@@ -1494,14 +1498,14 @@
14941498 #ifdef CONFIG_PM
14951499 static int nbpf_runtime_suspend(struct device *dev)
14961500 {
1497
-	struct nbpf_device *nbpf = platform_get_drvdata(to_platform_device(dev));
1501
+	struct nbpf_device *nbpf = dev_get_drvdata(dev);
14981502 	clk_disable_unprepare(nbpf->clk);
14991503 	return 0;
15001504 }
15011505 
15021506 static int nbpf_runtime_resume(struct device *dev)
15031507 {
1504
-	struct nbpf_device *nbpf = platform_get_drvdata(to_platform_device(dev));
1508
+	struct nbpf_device *nbpf = dev_get_drvdata(dev);
15051509 	return clk_prepare_enable(nbpf->clk);
15061510 }
15071511 #endif