FREESCALE FEC DRIVER

Article This is v2 of my initial round of patches roughly half of my total patch set for the Freescale FEC driver. I’m sending this set out for comments and testing. So far, I have had only one ack for one patch in this series, this is pretty poor, so I’m now sending it with a CFT tag instead. I’m not entirely convinced this is a good idea – maybe it should become optional, or maybe the timed-out ring status should be available via debugfs, but that’s a problem to retrieve if you’re running NFS rootfs and the timeout doesn’t recover properly. There’s quite a lot here, so bear with me on this.

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I’m sending this frc out for comments and testing. This patch is not strictly part of the RFC, but is included because my complete patch series needs to account for that change. While the original series was well tested during it’s original fef, including with performance tests on each patch, that testing and validation has been lost due to the changes during the last merge window, and subsequent rebasing and updating of the patches.

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Fri, 27 Jun Towards the end of this series, I have included a patch which was initially at the beginning of the series for dumping out the state of the transmit ring, which is very useful to debug transmit problems. So far, I have had only one ack for one patch in this series, this is pretty poor, so I’m now sending it with a CFT tag instead.

Some of these patches are to fix theoretical problems in the driver ones which have been found via a review of the code others address real observable problems such as poor half-duplex performance. The remainder of the text is as per my previous message, but with updated diffstat: One of my motivations for only sending half is to get this half into a state where DaveM is happy to merge it before I sort out the remainder.

I’m not entirely convinced this is a good idea – maybe it should become optional, or maybe the timed-out ring status should be available via debugfs, but that’s a problem to retrieve if you’re running NFS rootfs and the timeout doesn’t recover properly.

This was acceptable when the transmit ring was between 16 and descriptors, but during the recent merge window, this was increased to descriptors, so it will now print around lines to cec kernel message log on transmit timeout. Initial round of Freescale FEC ethernet patches. Fef tried to sort the fixes before the cleanups as best I can, but reordering the series is a full-time job due to it’s size – it’s taken from Monday until now to get this far with it, so I’m hoping that there won’t freescle any “you should rearrange the patches as X” comments.

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LXR linux/drivers/net/ethernet/freescale/fec.c

The series is based on v3. There’s quite a lot here, so bear with me on this.

I haven’t changed too much – I’ve fixed the bug which Andy spotted in the transmit handling, but otherwise the patches are much the same. Article This is v2 of my initial round of patches roughly half of my total patch set for the Freescale FEC driver.

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