dma-mapping: update the old macro DMA_nBIT_MASK related documentations
Update the old macro DMA_nBIT_MASK related documentations Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -136,7 +136,7 @@ exactly why.
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The standard 32-bit addressing PCI device would do something like
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this:
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if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
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if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
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printk(KERN_WARNING
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"mydev: No suitable DMA available.\n");
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goto ignore_this_device;
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@ -155,9 +155,9 @@ all 64-bits when accessing streaming DMA:
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int using_dac;
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if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
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if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
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using_dac = 1;
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} else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
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} else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
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using_dac = 0;
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} else {
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printk(KERN_WARNING
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@ -170,14 +170,14 @@ the case would look like this:
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int using_dac, consistent_using_dac;
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if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
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if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
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using_dac = 1;
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consistent_using_dac = 1;
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pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
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} else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
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pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
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} else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
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using_dac = 0;
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consistent_using_dac = 0;
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pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
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pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
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} else {
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printk(KERN_WARNING
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"mydev: No suitable DMA available.\n");
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@ -192,7 +192,7 @@ check the return value from pci_set_consistent_dma_mask().
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Finally, if your device can only drive the low 24-bits of
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address during PCI bus mastering you might do something like:
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if (pci_set_dma_mask(pdev, DMA_24BIT_MASK)) {
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if (pci_set_dma_mask(pdev, DMA_BIT_MASK(24))) {
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printk(KERN_WARNING
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"mydev: 24-bit DMA addressing not available.\n");
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goto ignore_this_device;
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@ -213,7 +213,7 @@ most specific mask.
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Here is pseudo-code showing how this might be done:
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#define PLAYBACK_ADDRESS_BITS DMA_32BIT_MASK
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#define PLAYBACK_ADDRESS_BITS DMA_BIT_MASK(32)
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#define RECORD_ADDRESS_BITS 0x00ffffff
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struct my_sound_card *card;
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@ -1137,8 +1137,8 @@
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if (err < 0)
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return err;
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/* check PCI availability (28bit DMA) */
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if (pci_set_dma_mask(pci, DMA_28BIT_MASK) < 0 ||
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pci_set_consistent_dma_mask(pci, DMA_28BIT_MASK) < 0) {
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if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
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pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
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printk(KERN_ERR "error to set 28bit mask DMA\n");
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pci_disable_device(pci);
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return -ENXIO;
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@ -1252,8 +1252,8 @@
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err = pci_enable_device(pci);
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if (err < 0)
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return err;
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if (pci_set_dma_mask(pci, DMA_28BIT_MASK) < 0 ||
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pci_set_consistent_dma_mask(pci, DMA_28BIT_MASK) < 0) {
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if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
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pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
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printk(KERN_ERR "error to set 28bit mask DMA\n");
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pci_disable_device(pci);
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return -ENXIO;
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