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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-08 12:36:50 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-08 12:36:50 -0700 |
commit | 2ceedf97aef41d071d897a6e6aec8c05fb707ec4 (patch) | |
tree | 8435c97dbb7333f8b4977e041075f7a68dfbb92b /drivers/dma/sh | |
parent | 09b56d5a418b7ced4ca427c7cf8faf11df72364c (diff) | |
parent | 3edc85023a1e1daf22d8e372c5c4f87dc4a04a71 (diff) | |
download | linux-2ceedf97aef41d071d897a6e6aec8c05fb707ec4.tar.gz linux-2ceedf97aef41d071d897a6e6aec8c05fb707ec4.tar.bz2 linux-2ceedf97aef41d071d897a6e6aec8c05fb707ec4.zip |
Merge tag 'dmaengine-4.13-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
- removal of AVR32 support in dw driver as AVR32 is gone
- new driver for Broadcom stream buffer accelerator (SBA) RAID driver
- add support for Faraday Technology FTDMAC020 in amba-pl08x driver
- IOMMU support in pl330 driver
- updates to bunch of drivers
* tag 'dmaengine-4.13-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (36 commits)
dmaengine: qcom_hidma: correct API violation for submit
dmaengine: zynqmp_dma: Remove max len check in zynqmp_dma_prep_memcpy
dmaengine: tegra-apb: Really fix runtime-pm usage
dmaengine: fsl_raid: make of_device_ids const.
dmaengine: qcom_hidma: allow ACPI/DT parameters to be overridden
dmaengine: fsldma: set BWC, DAHTS and SAHTS values correctly
dmaengine: Kconfig: Simplify the help text for MXS_DMA
dmaengine: pl330: Delete unused functions
dmaengine: Replace WARN_TAINT_ONCE() with pr_warn_once()
dmaengine: Kconfig: Extend the dependency for MXS_DMA
dmaengine: mxs: Use %zu for printing a size_t variable
dmaengine: ste_dma40: Cleanup scatterlist layering violations
dmaengine: imx-dma: cleanup scatterlist layering violations
dmaengine: use proper name for the R-Car SoC
dmaengine: imx-sdma: Fix compilation warning.
dmaengine: imx-sdma: Handle return value of clk_prepare_enable
dmaengine: pl330: Add IOMMU support to slave tranfers
dmaengine: DW DMAC: Handle return value of clk_prepare_enable
dmaengine: pl08x: use GENMASK() to create bitmasks
dmaengine: pl08x: Add support for Faraday Technology FTDMAC020
...
Diffstat (limited to 'drivers/dma/sh')
-rw-r--r-- | drivers/dma/sh/rcar-dmac.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index bd261c9e9664..ffcadca53243 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -144,6 +144,7 @@ struct rcar_dmac_chan_map { * @chan: base DMA channel object * @iomem: channel I/O memory base * @index: index of this channel in the controller + * @irq: channel IRQ * @src: slave memory address and size on the source side * @dst: slave memory address and size on the destination side * @mid_rid: hardware MID/RID for the DMA client using this channel @@ -161,6 +162,7 @@ struct rcar_dmac_chan { struct dma_chan chan; void __iomem *iomem; unsigned int index; + int irq; struct rcar_dmac_chan_slave src; struct rcar_dmac_chan_slave dst; @@ -1008,7 +1010,11 @@ static void rcar_dmac_free_chan_resources(struct dma_chan *chan) rcar_dmac_chan_halt(rchan); spin_unlock_irq(&rchan->lock); - /* Now no new interrupts will occur */ + /* + * Now no new interrupts will occur, but one might already be + * running. Wait for it to finish before freeing resources. + */ + synchronize_irq(rchan->irq); if (rchan->mid_rid >= 0) { /* The caller is holding dma_list_mutex */ @@ -1366,6 +1372,13 @@ done: spin_unlock_irqrestore(&rchan->lock, flags); } +static void rcar_dmac_device_synchronize(struct dma_chan *chan) +{ + struct rcar_dmac_chan *rchan = to_rcar_dmac_chan(chan); + + synchronize_irq(rchan->irq); +} + /* ----------------------------------------------------------------------------- * IRQ handling */ @@ -1650,7 +1663,6 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac, struct dma_chan *chan = &rchan->chan; char pdev_irqname[5]; char *irqname; - int irq; int ret; rchan->index = index; @@ -1667,8 +1679,8 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac, /* Request the channel interrupt. */ sprintf(pdev_irqname, "ch%u", index); - irq = platform_get_irq_byname(pdev, pdev_irqname); - if (irq < 0) { + rchan->irq = platform_get_irq_byname(pdev, pdev_irqname); + if (rchan->irq < 0) { dev_err(dmac->dev, "no IRQ specified for channel %u\n", index); return -ENODEV; } @@ -1678,11 +1690,13 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac, if (!irqname) return -ENOMEM; - ret = devm_request_threaded_irq(dmac->dev, irq, rcar_dmac_isr_channel, + ret = devm_request_threaded_irq(dmac->dev, rchan->irq, + rcar_dmac_isr_channel, rcar_dmac_isr_channel_thread, 0, irqname, rchan); if (ret) { - dev_err(dmac->dev, "failed to request IRQ %u (%d)\n", irq, ret); + dev_err(dmac->dev, "failed to request IRQ %u (%d)\n", + rchan->irq, ret); return ret; } @@ -1846,6 +1860,7 @@ static int rcar_dmac_probe(struct platform_device *pdev) engine->device_terminate_all = rcar_dmac_chan_terminate_all; engine->device_tx_status = rcar_dmac_tx_status; engine->device_issue_pending = rcar_dmac_issue_pending; + engine->device_synchronize = rcar_dmac_device_synchronize; ret = dma_async_device_register(engine); if (ret < 0) |