diff options
Diffstat (limited to 'drivers/rapidio/devices/tsi721_dma.c')
| -rw-r--r-- | drivers/rapidio/devices/tsi721_dma.c | 82 |
1 files changed, 73 insertions, 9 deletions
diff --git a/drivers/rapidio/devices/tsi721_dma.c b/drivers/rapidio/devices/tsi721_dma.c index 03637330c482..155cae1e62de 100644 --- a/drivers/rapidio/devices/tsi721_dma.c +++ b/drivers/rapidio/devices/tsi721_dma.c @@ -282,7 +282,7 @@ void tsi721_bdma_handler(struct tsi721_bdma_chan *bdma_chan) /* Disable BDMA channel interrupts */ iowrite32(0, bdma_chan->regs + TSI721_DMAC_INTE); if (bdma_chan->active) - tasklet_schedule(&bdma_chan->tasklet); + tasklet_hi_schedule(&bdma_chan->tasklet); } #ifdef CONFIG_PCI_MSI @@ -298,7 +298,7 @@ static irqreturn_t tsi721_bdma_msix(int irq, void *ptr) struct tsi721_bdma_chan *bdma_chan = ptr; if (bdma_chan->active) - tasklet_schedule(&bdma_chan->tasklet); + tasklet_hi_schedule(&bdma_chan->tasklet); return IRQ_HANDLED; } #endif /* CONFIG_PCI_MSI */ @@ -584,13 +584,71 @@ static void tsi721_dma_tasklet(unsigned long data) iowrite32(dmac_int, bdma_chan->regs + TSI721_DMAC_INT); if (dmac_int & TSI721_DMAC_INT_ERR) { + int i = 10000; + struct tsi721_tx_desc *desc; + + desc = bdma_chan->active_tx; dmac_sts = ioread32(bdma_chan->regs + TSI721_DMAC_STS); tsi_err(&bdma_chan->dchan.dev->device, - "ERR - DMAC%d_STS = 0x%x", - bdma_chan->id, dmac_sts); + "DMAC%d_STS = 0x%x did=%d raddr=0x%llx", + bdma_chan->id, dmac_sts, desc->destid, desc->rio_addr); + + /* Re-initialize DMA channel if possible */ + + if ((dmac_sts & TSI721_DMAC_STS_ABORT) == 0) + goto err_out; + + tsi721_clr_stat(bdma_chan); spin_lock(&bdma_chan->lock); + + /* Put DMA channel into init state */ + iowrite32(TSI721_DMAC_CTL_INIT, + bdma_chan->regs + TSI721_DMAC_CTL); + do { + udelay(1); + dmac_sts = ioread32(bdma_chan->regs + TSI721_DMAC_STS); + i--; + } while ((dmac_sts & TSI721_DMAC_STS_ABORT) && i); + + if (dmac_sts & TSI721_DMAC_STS_ABORT) { + tsi_err(&bdma_chan->dchan.dev->device, + "Failed to re-initiate DMAC%d", bdma_chan->id); + spin_unlock(&bdma_chan->lock); + goto err_out; + } + + /* Setup DMA descriptor pointers */ + iowrite32(((u64)bdma_chan->bd_phys >> 32), + bdma_chan->regs + TSI721_DMAC_DPTRH); + iowrite32(((u64)bdma_chan->bd_phys & TSI721_DMAC_DPTRL_MASK), + bdma_chan->regs + TSI721_DMAC_DPTRL); + + /* Setup descriptor status FIFO */ + iowrite32(((u64)bdma_chan->sts_phys >> 32), + bdma_chan->regs + TSI721_DMAC_DSBH); + iowrite32(((u64)bdma_chan->sts_phys & TSI721_DMAC_DSBL_MASK), + bdma_chan->regs + TSI721_DMAC_DSBL); + iowrite32(TSI721_DMAC_DSSZ_SIZE(bdma_chan->sts_size), + bdma_chan->regs + TSI721_DMAC_DSSZ); + + /* Clear interrupt bits */ + iowrite32(TSI721_DMAC_INT_ALL, + bdma_chan->regs + TSI721_DMAC_INT); + + ioread32(bdma_chan->regs + TSI721_DMAC_INT); + + bdma_chan->wr_count = bdma_chan->wr_count_next = 0; + bdma_chan->sts_rdptr = 0; + udelay(10); + + desc = bdma_chan->active_tx; + desc->status = DMA_ERROR; + dma_cookie_complete(&desc->txd); + list_add(&desc->desc_node, &bdma_chan->free_list); bdma_chan->active_tx = NULL; + if (bdma_chan->active) + tsi721_advance_work(bdma_chan, NULL); spin_unlock(&bdma_chan->lock); } @@ -619,16 +677,19 @@ static void tsi721_dma_tasklet(unsigned long data) } list_add(&desc->desc_node, &bdma_chan->free_list); bdma_chan->active_tx = NULL; - tsi721_advance_work(bdma_chan, NULL); + if (bdma_chan->active) + tsi721_advance_work(bdma_chan, NULL); spin_unlock(&bdma_chan->lock); if (callback) callback(param); } else { - tsi721_advance_work(bdma_chan, bdma_chan->active_tx); + if (bdma_chan->active) + tsi721_advance_work(bdma_chan, + bdma_chan->active_tx); spin_unlock(&bdma_chan->lock); } } - +err_out: /* Re-Enable BDMA channel interrupts */ iowrite32(TSI721_DMAC_INT_ALL, bdma_chan->regs + TSI721_DMAC_INTE); } @@ -841,7 +902,6 @@ static int tsi721_terminate_all(struct dma_chan *dchan) { struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan); struct tsi721_tx_desc *desc, *_d; - u32 dmac_int; LIST_HEAD(list); tsi_debug(DMA, &dchan->dev->device, "DMAC%d", bdma_chan->id); @@ -850,7 +910,10 @@ static int tsi721_terminate_all(struct dma_chan *dchan) bdma_chan->active = false; - if (!tsi721_dma_is_idle(bdma_chan)) { + while (!tsi721_dma_is_idle(bdma_chan)) { + + udelay(5); +#if (0) /* make sure to stop the transfer */ iowrite32(TSI721_DMAC_CTL_SUSP, bdma_chan->regs + TSI721_DMAC_CTL); @@ -859,6 +922,7 @@ static int tsi721_terminate_all(struct dma_chan *dchan) do { dmac_int = ioread32(bdma_chan->regs + TSI721_DMAC_INT); } while ((dmac_int & TSI721_DMAC_INT_SUSP) == 0); +#endif } if (bdma_chan->active_tx) |