On Sat, Aug 17, 2013 at 09:42:21PM -0500, Joel Fernandes wrote: > Following patch series rewrites the DMA code to be cleaner and faster. Earlier, > only a single SG was used for DMA purpose, and the SG-list passed from the > crypto layer was being copied and DMA'd one entry at a time. This turns out to > be quite inefficient and lot of code, we replace it with much simpler approach > that directly passes the SG-list from crypto to the DMA layers for cases where > possible. For all cases where such a direct passing of SG list is not possible, > we create a new SG-list and do the copying. This is still better than before, as > we create an SG list as big as needed and not just 1-element list. > > We also add PIO mode support to the driver, and switch to it whenever the DMA > channel allocation is not available. This also has shown to give good performance > for small blocks as shown below. > > Tests have been performed on AM335x, OMAP4 and AM437x SoCs. > > Below is a sample run on AM335x SoC (beaglebone board), showing > performance improvement (20% for 8K blocks): All applied. Thanks! -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
