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author <hch@lst.de>2005-04-17 15:26:13 -0500
committerJames Bottomley <jejb@titanic>2005-04-18 13:49:58 -0500
commitbe7db055dd7261522557046370f49160728e3847 (patch)
tree314689dfb551ee9ad5ef8c27576762489a51897d /Documentation/DMA-mapping.txt
parent80e2ca3dcb1043420ac4b06de8eed3d6fedaddda (diff)
downloadop-kernel-dev-be7db055dd7261522557046370f49160728e3847.zip
op-kernel-dev-be7db055dd7261522557046370f49160728e3847.tar.gz
[PATCH] remove old scsi data direction macros
these have been wrappers for the generic dma direction bits since 2.5.x. This patch converts the few remaining drivers and removes the macros. Arjan noticed there's some hunk in here that shouldn't. Updated patch below: Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'Documentation/DMA-mapping.txt')
-rw-r--r--Documentation/DMA-mapping.txt12
1 files changed, 3 insertions, 9 deletions
diff --git a/Documentation/DMA-mapping.txt b/Documentation/DMA-mapping.txt
index f4ac37f..6845574 100644
--- a/Documentation/DMA-mapping.txt
+++ b/Documentation/DMA-mapping.txt
@@ -443,15 +443,9 @@ Only streaming mappings specify a direction, consistent mappings
implicitly have a direction attribute setting of
PCI_DMA_BIDIRECTIONAL.
-The SCSI subsystem provides mechanisms for you to easily obtain
-the direction to use, in the SCSI command:
-
- scsi_to_pci_dma_dir(SCSI_DIRECTION)
-
-Where SCSI_DIRECTION is obtained from the 'sc_data_direction'
-member of the SCSI command your driver is working on. The
-mentioned interface above returns a value suitable for passing
-into the streaming DMA mapping interfaces below.
+The SCSI subsystem tells you the direction to use in the
+'sc_data_direction' member of the SCSI command your driver is
+working on.
For Networking drivers, it's a rather simple affair. For transmit
packets, map/unmap them with the PCI_DMA_TODEVICE direction
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