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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-18 08:49:20 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-18 08:49:20 -0800 |
commit | ce1d3fde87d1a21f1ec1147dde32b2825dd3a276 (patch) | |
tree | 6ffab43e47e3a22a76bf9bf4efeecdf1b90dcb6f /drivers/dma/sun6i-dma.c | |
parent | 928fce2f6d8152d897790c1a5bbeef5642f69e0e (diff) | |
parent | 88987d2c7534a0269f567fb101e6d71a08f0f01d (diff) | |
download | linux-ce1d3fde87d1a21f1ec1147dde32b2825dd3a276.tar.bz2 |
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
"This update brings:
- the big cleanup up by Maxime for device control and slave
capabilities. This makes the API much cleaner.
- new IMG MDC driver by Andrew
- new Renesas R-Car Gen2 DMA Controller driver by Laurent along with
bunch of fixes on rcar drivers
- odd fixes and updates spread over driver"
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits)
dmaengine: pl330: add DMA_PAUSE feature
dmaengine: pl330: improve pl330_tx_status() function
dmaengine: rcar-dmac: Disable channel 0 when using IOMMU
dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata
dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device
dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR
dmaengine: rcar-dmac: Fix spinlock issues in interrupt
dmaenegine: edma: fix sparse warnings
dmaengine: rcar-dmac: Fix uninitialized variable usage
dmaengine: shdmac: extend PM methods
dmaengine: shdmac: use SET_RUNTIME_PM_OPS()
dmaengine: pl330: fix bug that cause start the same descs in cyclic
dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers
dmaengine: at_xdmac: simplify channel configuration stuff
dmaengine: at_xdmac: introduce save_cc field
dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel
ioat: fail self-test if wait_for_completion times out
dmaengine: dw: define DW_DMA_MAX_NR_MASTERS
dmaengine: dw: amend description of dma_dev field
dmatest: move src_off, dst_off, len inside loop
...
Diffstat (limited to 'drivers/dma/sun6i-dma.c')
-rw-r--r-- | drivers/dma/sun6i-dma.c | 160 |
1 files changed, 87 insertions, 73 deletions
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c index 159f1736a16f..7ebcf9bec698 100644 --- a/drivers/dma/sun6i-dma.c +++ b/drivers/dma/sun6i-dma.c @@ -355,38 +355,6 @@ static void sun6i_dma_free_desc(struct virt_dma_desc *vd) kfree(txd); } -static int sun6i_dma_terminate_all(struct sun6i_vchan *vchan) -{ - struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(vchan->vc.chan.device); - struct sun6i_pchan *pchan = vchan->phy; - unsigned long flags; - LIST_HEAD(head); - - spin_lock(&sdev->lock); - list_del_init(&vchan->node); - spin_unlock(&sdev->lock); - - spin_lock_irqsave(&vchan->vc.lock, flags); - - vchan_get_all_descriptors(&vchan->vc, &head); - - if (pchan) { - writel(DMA_CHAN_ENABLE_STOP, pchan->base + DMA_CHAN_ENABLE); - writel(DMA_CHAN_PAUSE_RESUME, pchan->base + DMA_CHAN_PAUSE); - - vchan->phy = NULL; - pchan->vchan = NULL; - pchan->desc = NULL; - pchan->done = NULL; - } - - spin_unlock_irqrestore(&vchan->vc.lock, flags); - - vchan_dma_desc_free_list(&vchan->vc, &head); - - return 0; -} - static int sun6i_dma_start_desc(struct sun6i_vchan *vchan) { struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(vchan->vc.chan.device); @@ -675,57 +643,92 @@ err_lli_free: return NULL; } -static int sun6i_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, - unsigned long arg) +static int sun6i_dma_config(struct dma_chan *chan, + struct dma_slave_config *config) +{ + struct sun6i_vchan *vchan = to_sun6i_vchan(chan); + + memcpy(&vchan->cfg, config, sizeof(*config)); + + return 0; +} + +static int sun6i_dma_pause(struct dma_chan *chan) +{ + struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device); + struct sun6i_vchan *vchan = to_sun6i_vchan(chan); + struct sun6i_pchan *pchan = vchan->phy; + + dev_dbg(chan2dev(chan), "vchan %p: pause\n", &vchan->vc); + + if (pchan) { + writel(DMA_CHAN_PAUSE_PAUSE, + pchan->base + DMA_CHAN_PAUSE); + } else { + spin_lock(&sdev->lock); + list_del_init(&vchan->node); + spin_unlock(&sdev->lock); + } + + return 0; +} + +static int sun6i_dma_resume(struct dma_chan *chan) { struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device); struct sun6i_vchan *vchan = to_sun6i_vchan(chan); struct sun6i_pchan *pchan = vchan->phy; unsigned long flags; - int ret = 0; - switch (cmd) { - case DMA_RESUME: - dev_dbg(chan2dev(chan), "vchan %p: resume\n", &vchan->vc); + dev_dbg(chan2dev(chan), "vchan %p: resume\n", &vchan->vc); - spin_lock_irqsave(&vchan->vc.lock, flags); + spin_lock_irqsave(&vchan->vc.lock, flags); - if (pchan) { - writel(DMA_CHAN_PAUSE_RESUME, - pchan->base + DMA_CHAN_PAUSE); - } else if (!list_empty(&vchan->vc.desc_issued)) { - spin_lock(&sdev->lock); - list_add_tail(&vchan->node, &sdev->pending); - spin_unlock(&sdev->lock); - } + if (pchan) { + writel(DMA_CHAN_PAUSE_RESUME, + pchan->base + DMA_CHAN_PAUSE); + } else if (!list_empty(&vchan->vc.desc_issued)) { + spin_lock(&sdev->lock); + list_add_tail(&vchan->node, &sdev->pending); + spin_unlock(&sdev->lock); + } - spin_unlock_irqrestore(&vchan->vc.lock, flags); - break; + spin_unlock_irqrestore(&vchan->vc.lock, flags); - case DMA_PAUSE: - dev_dbg(chan2dev(chan), "vchan %p: pause\n", &vchan->vc); + return 0; +} - if (pchan) { - writel(DMA_CHAN_PAUSE_PAUSE, - pchan->base + DMA_CHAN_PAUSE); - } else { - spin_lock(&sdev->lock); - list_del_init(&vchan->node); - spin_unlock(&sdev->lock); - } - break; - - case DMA_TERMINATE_ALL: - ret = sun6i_dma_terminate_all(vchan); - break; - case DMA_SLAVE_CONFIG: - memcpy(&vchan->cfg, (void *)arg, sizeof(struct dma_slave_config)); - break; - default: - ret = -ENXIO; - break; +static int sun6i_dma_terminate_all(struct dma_chan *chan) +{ + struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device); + struct sun6i_vchan *vchan = to_sun6i_vchan(chan); + struct sun6i_pchan *pchan = vchan->phy; + unsigned long flags; + LIST_HEAD(head); + + spin_lock(&sdev->lock); + list_del_init(&vchan->node); + spin_unlock(&sdev->lock); + + spin_lock_irqsave(&vchan->vc.lock, flags); + + vchan_get_all_descriptors(&vchan->vc, &head); + + if (pchan) { + writel(DMA_CHAN_ENABLE_STOP, pchan->base + DMA_CHAN_ENABLE); + writel(DMA_CHAN_PAUSE_RESUME, pchan->base + DMA_CHAN_PAUSE); + + vchan->phy = NULL; + pchan->vchan = NULL; + pchan->desc = NULL; + pchan->done = NULL; } - return ret; + + spin_unlock_irqrestore(&vchan->vc.lock, flags); + + vchan_dma_desc_free_list(&vchan->vc, &head); + + return 0; } static enum dma_status sun6i_dma_tx_status(struct dma_chan *chan, @@ -960,9 +963,20 @@ static int sun6i_dma_probe(struct platform_device *pdev) sdc->slave.device_issue_pending = sun6i_dma_issue_pending; sdc->slave.device_prep_slave_sg = sun6i_dma_prep_slave_sg; sdc->slave.device_prep_dma_memcpy = sun6i_dma_prep_dma_memcpy; - sdc->slave.device_control = sun6i_dma_control; sdc->slave.copy_align = 4; - + sdc->slave.device_config = sun6i_dma_config; + sdc->slave.device_pause = sun6i_dma_pause; + sdc->slave.device_resume = sun6i_dma_resume; + sdc->slave.device_terminate_all = sun6i_dma_terminate_all; + sdc->slave.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); + sdc->slave.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); + sdc->slave.directions = BIT(DMA_DEV_TO_MEM) | + BIT(DMA_MEM_TO_DEV); + sdc->slave.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; sdc->slave.dev = &pdev->dev; sdc->pchans = devm_kcalloc(&pdev->dev, sdc->cfg->nr_max_channels, |