Skip to content

Commit

Permalink
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git…
Browse files Browse the repository at this point in the history 
…/djbw/async_tx

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
  dma: fix ipu_idmac.c to not discard the last queued buffer
  ioatdma: fix "ioatdma frees DMA memory with wrong function"
  ipu_idmac: Use disable_irq_nosync() from within irq handlers.
  dmatest: fix max channels handling
  • Loading branch information
Linus Torvalds committed May 13, 2009
2 parents 2ea3f86 + ad567ff commit bd99f5e
Show file tree
Hide file tree
Showing 5 changed files with 50 additions and 29 deletions.
17 changes: 11 additions & 6 deletions drivers/dma/dmaengine.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -804,11 +804,14 @@ dma_async_memcpy_buf_to_buf(struct dma_chan *chan, void *dest,
dma_addr_t dma_dest, dma_src;
dma_cookie_t cookie;
int cpu;
unsigned long flags;

dma_src = dma_map_single(dev->dev, src, len, DMA_TO_DEVICE);
dma_dest = dma_map_single(dev->dev, dest, len, DMA_FROM_DEVICE);
tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len,
DMA_CTRL_ACK);
flags = DMA_CTRL_ACK |
DMA_COMPL_SRC_UNMAP_SINGLE |
DMA_COMPL_DEST_UNMAP_SINGLE;
tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, flags);

if (!tx) {
dma_unmap_single(dev->dev, dma_src, len, DMA_TO_DEVICE);
Expand Down Expand Up @@ -850,11 +853,12 @@ dma_async_memcpy_buf_to_pg(struct dma_chan *chan, struct page *page,
dma_addr_t dma_dest, dma_src;
dma_cookie_t cookie;
int cpu;
unsigned long flags;

dma_src = dma_map_single(dev->dev, kdata, len, DMA_TO_DEVICE);
dma_dest = dma_map_page(dev->dev, page, offset, len, DMA_FROM_DEVICE);
tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len,
DMA_CTRL_ACK);
flags = DMA_CTRL_ACK | DMA_COMPL_SRC_UNMAP_SINGLE;
tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, flags);

if (!tx) {
dma_unmap_single(dev->dev, dma_src, len, DMA_TO_DEVICE);
Expand Down Expand Up @@ -898,12 +902,13 @@ dma_async_memcpy_pg_to_pg(struct dma_chan *chan, struct page *dest_pg,
dma_addr_t dma_dest, dma_src;
dma_cookie_t cookie;
int cpu;
unsigned long flags;

dma_src = dma_map_page(dev->dev, src_pg, src_off, len, DMA_TO_DEVICE);
dma_dest = dma_map_page(dev->dev, dest_pg, dest_off, len,
DMA_FROM_DEVICE);
tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len,
DMA_CTRL_ACK);
flags = DMA_CTRL_ACK;
tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, flags);

if (!tx) {
dma_unmap_page(dev->dev, dma_src, len, DMA_TO_DEVICE);
Expand Down
4 changes: 1 addition & 3 deletions drivers/dma/dmatest.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -531,9 +531,7 @@ static int __init dmatest_init(void)
chan = dma_request_channel(mask, filter, NULL);
if (chan) {
err = dmatest_add_channel(chan);
if (err == 0)
continue;
else {
if (err) {
dma_release_channel(chan);
break; /* add_channel failed, punt */
}
Expand Down
45 changes: 28 additions & 17 deletions drivers/dma/ioat_dma.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1063,22 +1063,31 @@ static void ioat_dma_cleanup_tasklet(unsigned long data)
static void
ioat_dma_unmap(struct ioat_dma_chan *ioat_chan, struct ioat_desc_sw *desc)
{
/*
* yes we are unmapping both _page and _single
* alloc'd regions with unmap_page. Is this
* *really* that bad?
*/
if (!(desc->async_tx.flags & DMA_COMPL_SKIP_DEST_UNMAP))
pci_unmap_page(ioat_chan->device->pdev,
pci_unmap_addr(desc, dst),
pci_unmap_len(desc, len),
PCI_DMA_FROMDEVICE);

if (!(desc->async_tx.flags & DMA_COMPL_SKIP_SRC_UNMAP))
pci_unmap_page(ioat_chan->device->pdev,
pci_unmap_addr(desc, src),
pci_unmap_len(desc, len),
PCI_DMA_TODEVICE);
if (!(desc->async_tx.flags & DMA_COMPL_SKIP_DEST_UNMAP)) {
if (desc->async_tx.flags & DMA_COMPL_DEST_UNMAP_SINGLE)
pci_unmap_single(ioat_chan->device->pdev,
pci_unmap_addr(desc, dst),
pci_unmap_len(desc, len),
PCI_DMA_FROMDEVICE);
else
pci_unmap_page(ioat_chan->device->pdev,
pci_unmap_addr(desc, dst),
pci_unmap_len(desc, len),
PCI_DMA_FROMDEVICE);
}

if (!(desc->async_tx.flags & DMA_COMPL_SKIP_SRC_UNMAP)) {
if (desc->async_tx.flags & DMA_COMPL_SRC_UNMAP_SINGLE)
pci_unmap_single(ioat_chan->device->pdev,
pci_unmap_addr(desc, src),
pci_unmap_len(desc, len),
PCI_DMA_TODEVICE);
else
pci_unmap_page(ioat_chan->device->pdev,
pci_unmap_addr(desc, src),
pci_unmap_len(desc, len),
PCI_DMA_TODEVICE);
}
}

/**
Expand Down Expand Up @@ -1363,6 +1372,7 @@ static int ioat_dma_self_test(struct ioatdma_device *device)
int err = 0;
struct completion cmp;
unsigned long tmo;
unsigned long flags;

src = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL);
if (!src)
Expand Down Expand Up @@ -1392,8 +1402,9 @@ static int ioat_dma_self_test(struct ioatdma_device *device)
DMA_TO_DEVICE);
dma_dest = dma_map_single(dma_chan->device->dev, dest, IOAT_TEST_SIZE,
DMA_FROM_DEVICE);
flags = DMA_COMPL_SRC_UNMAP_SINGLE | DMA_COMPL_DEST_UNMAP_SINGLE;
tx = device->common.device_prep_dma_memcpy(dma_chan, dma_dest, dma_src,
IOAT_TEST_SIZE, 0);
IOAT_TEST_SIZE, flags);
if (!tx) {
dev_err(&device->pdev->dev,
"Self-test prep failed, disabling\n");
Expand Down
7 changes: 4 additions & 3 deletions drivers/dma/ipu/ipu_idmac.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1272,7 +1272,8 @@ static irqreturn_t idmac_interrupt(int irq, void *dev_id)
/* Other interrupts do not interfere with this channel */
spin_lock(&ichan->lock);
if (unlikely(chan_id != IDMAC_SDC_0 && chan_id != IDMAC_SDC_1 &&
((curbuf >> chan_id) & 1) == ichan->active_buffer)) {
((curbuf >> chan_id) & 1) == ichan->active_buffer &&
!list_is_last(ichan->queue.next, &ichan->queue))) {
int i = 100;

/* This doesn't help. See comment in ipu_disable_channel() */
Expand Down Expand Up @@ -1547,7 +1548,7 @@ static irqreturn_t ic_sof_irq(int irq, void *dev_id)
struct idmac_channel *ichan = dev_id;
printk(KERN_DEBUG "Got SOF IRQ %d on Channel %d\n",
irq, ichan->dma_chan.chan_id);
disable_irq(irq);
disable_irq_nosync(irq);
return IRQ_HANDLED;
}

Expand All @@ -1556,7 +1557,7 @@ static irqreturn_t ic_eof_irq(int irq, void *dev_id)
struct idmac_channel *ichan = dev_id;
printk(KERN_DEBUG "Got EOF IRQ %d on Channel %d\n",
irq, ichan->dma_chan.chan_id);
disable_irq(irq);
disable_irq_nosync(irq);
return IRQ_HANDLED;
}

Expand Down
6 changes: 6 additions & 0 deletions include/linux/dmaengine.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -78,12 +78,18 @@ enum dma_transaction_type {
* dependency chains
* @DMA_COMPL_SKIP_SRC_UNMAP - set to disable dma-unmapping the source buffer(s)
* @DMA_COMPL_SKIP_DEST_UNMAP - set to disable dma-unmapping the destination(s)
* @DMA_COMPL_SRC_UNMAP_SINGLE - set to do the source dma-unmapping as single
* (if not set, do the source dma-unmapping as page)
* @DMA_COMPL_DEST_UNMAP_SINGLE - set to do the destination dma-unmapping as single
* (if not set, do the destination dma-unmapping as page)
*/
enum dma_ctrl_flags {
DMA_PREP_INTERRUPT = (1 << 0),
DMA_CTRL_ACK = (1 << 1),
DMA_COMPL_SKIP_SRC_UNMAP = (1 << 2),
DMA_COMPL_SKIP_DEST_UNMAP = (1 << 3),
DMA_COMPL_SRC_UNMAP_SINGLE = (1 << 4),
DMA_COMPL_DEST_UNMAP_SINGLE = (1 << 5),
};

/**
Expand Down

0 comments on commit bd99f5e

Please sign in to comment.