Merge tag 'dmaengine-5.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:

 - Updates to stm32 dma residue calculations

 - Interleave dma capability to axi-dmac and support for ZynqMP arch

 - Rework of channel assignment for rcar dma

 - Debugfs for pl330 driver

 - Support for Tegra186/Tegra194, refactoring for new chips and support
   for pause/resume

 - Updates to axi-dmac, bcm2835, fsl-edma, idma64, imx-sdma, rcar-dmac,
   stm32-dma etc

 - dev_get_drvdata() updates on few drivers

* tag 'dmaengine-5.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (34 commits)
  dmaengine: tegra210-adma: restore channel status
  dmaengine: tegra210-dma: free dma controller in remove()
  dmaengine: tegra210-adma: add pause/resume support
  dmaengine: tegra210-adma: add support for Tegra186/Tegra194
  Documentation: DT: Add compatibility binding for Tegra186
  dmaengine: tegra210-adma: prepare for supporting newer Tegra chips
  dmaengine: at_xdmac: remove a stray bottom half unlock
  dmaengine: fsl-edma: Adjust indentation
  dmaengine: fsl-edma: Fix typo in Vybrid name
  dmaengine: stm32-dma: fix residue calculation in stm32-dma
  dmaengine: nbpfaxi: Use dev_get_drvdata()
  dmaengine: bcm-sba-raid: Use dev_get_drvdata()
  dmaengine: stm32-dma: Fix unsigned variable compared with zero
  dmaengine: stm32-dma: use platform_get_irq()
  dmaengine: rcar-dmac: Update copyright information
  dmaengine: imx-sdma: Only check ratio on parts that support 1:1
  dmaengine: xgene-dma: fix spelling mistake "descripto" -> "descriptor"
  dmaengine: idma64: Move driver name to the header
  dmaengine: bcm2835: Drop duplicate capability setting.
  dmaengine: pl330: _stop: clear interrupt status
  ...

1 files changed, 58 insertions, 3 deletions

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index eec79fdf27a5..6e6837214210 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -11,6 +11,7 @@
  * (at your option) any later version.
  */
 
+#include <linux/debugfs.h>
 #include <linux/kernel.h>
 #include <linux/io.h>
 #include <linux/init.h>
@@ -966,6 +967,7 @@ static void _stop(struct pl330_thread *thrd)
 {
 	void __iomem *regs = thrd->dmac->base;
 	u8 insn[6] = {0, 0, 0, 0, 0, 0};
+	u32 inten = readl(regs + INTEN);
 
 	if (_state(thrd) == PL330_STATE_FAULT_COMPLETING)
 		UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING);
@@ -978,10 +980,13 @@ static void _stop(struct pl330_thread *thrd)
 
 	_emit_KILL(0, insn);
 
-	/* Stop generating interrupts for SEV */
-	writel(readl(regs + INTEN) & ~(1 << thrd->ev), regs + INTEN);
-
 	_execute_DBGINSN(thrd, insn, is_manager(thrd));
+
+	/* clear the event */
+	if (inten & (1 << thrd->ev))
+		writel(1 << thrd->ev, regs + INTCLR);
+	/* Stop generating interrupts for SEV */
+	writel(inten & ~(1 << thrd->ev), regs + INTEN);
 }
 
 /* Start doing req 'idx' of thread 'thrd' */
@@ -2896,6 +2901,55 @@ static irqreturn_t pl330_irq_handler(int irq, void *data)
 	BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \
 	BIT(DMA_SLAVE_BUSWIDTH_8_BYTES)
 
+#ifdef CONFIG_DEBUG_FS
+static int pl330_debugfs_show(struct seq_file *s, void *data)
+{
+	struct pl330_dmac *pl330 = s->private;
+	int chans, pchs, ch, pr;
+
+	chans = pl330->pcfg.num_chan;
+	pchs = pl330->num_peripherals;
+
+	seq_puts(s, "PL330 physical channels:\n");
+	seq_puts(s, "THREAD:\t\tCHANNEL:\n");
+	seq_puts(s, "--------\t-----\n");
+	for (ch = 0; ch < chans; ch++) {
+		struct pl330_thread *thrd = &pl330->channels[ch];
+		int found = -1;
+
+		for (pr = 0; pr < pchs; pr++) {
+			struct dma_pl330_chan *pch = &pl330->peripherals[pr];
+
+			if (!pch->thread || thrd->id != pch->thread->id)
+				continue;
+
+			found = pr;
+		}
+
+		seq_printf(s, "%d\t\t", thrd->id);
+		if (found == -1)
+			seq_puts(s, "--\n");
+		else
+			seq_printf(s, "%d\n", found);
+	}
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(pl330_debugfs);
+
+static inline void init_pl330_debugfs(struct pl330_dmac *pl330)
+{
+	debugfs_create_file(dev_name(pl330->ddma.dev),
+			    S_IFREG | 0444, NULL, pl330,
+			    &pl330_debugfs_fops);
+}
+#else
+static inline void init_pl330_debugfs(struct pl330_dmac *pl330)
+{
+}
+#endif
+
 /*
  * Runtime PM callbacks are provided by amba/bus.c driver.
  *
@@ -3082,6 +3136,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
 		dev_err(&adev->dev, "unable to set the seg size\n");
 
 
+	init_pl330_debugfs(pl330);
 	dev_info(&adev->dev,
 		"Loaded driver for PL330 DMAC-%x\n", adev->periphid);
 	dev_info(&adev->dev,