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* cns3xxx: improve ethernet performance by using the page fragment allocation APIFelix Fietkau2016-01-311-7/+7
| | | | | | Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 48580
* cns3xxx: fix ethernet DMA ring allocation issuesFelix Fietkau2016-01-311-50/+32
| | | | | | Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 48579
* cns3xxx: fix a ethernet driver napi poll handling bugFelix Fietkau2016-01-181-1/+2
| | | | | | Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 48333
* cns3xxx: remove unused define and use of a deprecated functionFelix Fietkau2016-01-181-2/+1
| | | | | | Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 48329
* cns3xxx: switch to using the upstream dwc2 driver instead of dwc_otgFelix Fietkau2014-11-2618-22924/+0
| | | | | | Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 43398
* cns3xxx: set base device for ethernet port netdevsFelix Fietkau2014-11-261-0/+1
| | | | | | Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 43395
* cns3xxx: fix passing the device to dma mapping opsFelix Fietkau2014-11-261-17/+20
| | | | | | Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 43394
* cns3xxx: update to linux 3.10Felix Fietkau2014-07-318-130/+110
| | | | | | Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 41917
* cns3xxx: ethernet - revert: clean up tx descs only when neededFelix Fietkau2014-04-291-8/+4
| | | | | | | | | | | | | This reverts commit 0772ab938c0aedd7f4cc7127059d6ce8cf929dfa. Trying to optimize calls to eth_complete_tx in this fasion causes a regression where when sending only the tx queue can get disabled until a packet is received. This original call to eth_schedule_poll() is scheduled so it should not cause a performance issue. Signed-off-by: Tim Harvey <tharvey@gateworks.com> SVN-Revision: 40592
* various dwc (OTG) driver fixupsImre Kaloz2014-03-128-95/+442
| | | | | | | Signed-off-by: Tim Harvey <tharvey@gateworks.com> Signed-off-by: Imre Kaloz <kaloz@openwrt.org> SVN-Revision: 39892
* cns3xxx: ethernet - clean up tx descs only when neededFelix Fietkau2014-02-271-4/+8
| | | | | | | | | | | We already clean up tx descriptors in the napi eth_poll() function so it would likely be rare to run out of available descriptors in eth_xmit. Thus we can clean them up only when needed and return busy only when we still don't have enough. Signed-off-by: Tim Harvey <tharvey@gateworks.com> SVN-Revision: 39762
* cns3xxx: ethernet - resolve SMP issueFelix Fietkau2014-02-271-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The combination of r35942 and r35952 causes an issue where eth_schedule_poll() can be called from a different CPU between the call to napi_complete() and the setting of cur_index which can break the rx ring accounting and cause ethernet latency and/or ethernet stalls. The issue can be easilly created by adding a couple of artificial delays such as: @@ -715,6 +715,7 @@ static int eth_poll(struct napi_struct *napi, int budget) if (!received) { napi_complete(napi); +udelay(1000); enable_irq(IRQ_CNS3XXX_SW_R0RXC); } @@ -727,6 +728,7 @@ static int eth_poll(struct napi_struct *napi, int budget) rx_ring->cur_index = i; wmb(); +udelay(1000); enable_rx_dma(sw); return received; This patch moves the setting of cur_index back up where it needs to be and addresses the original corner case that r35942 was trying to catch in an improved fashion by checking to see if the rx descriptor ring has become full before interrupts were re-enabled so that a poll can be scheduled again and avoid an rx stall caused by rx interrupts ceasing to fire again. Signed-off-by: Tim Harvey <tharvey@gateworks.com> SVN-Revision: 39761
* cns3xxx: ethernet - clean the tx ring before refilling the rx ring to reduce ↵Felix Fietkau2013-03-111-4/+4
| | | | | | memory pressure SVN-Revision: 35953
* cns3xxx: ethernet - clean the tx ring only in the poll function, not in the ↵Felix Fietkau2013-03-111-6/+11
| | | | | | xmit handler SVN-Revision: 35952
* cns3xxx: increase number of ethernet driver rx buffersFelix Fietkau2013-03-101-1/+1
| | | | SVN-Revision: 35951
* cns3xxx: prevent the ethernet driver from accessing uninitialized dma ↵Felix Fietkau2013-03-101-1/+2
| | | | | | descriptor entries SVN-Revision: 35950
* cns3xxx: minor ethernet driver cleanupFelix Fietkau2013-03-101-35/+19
| | | | SVN-Revision: 35949
* cns3xxx: use kmalloc instead of kzalloc for ethernet rx buffersFelix Fietkau2013-03-101-1/+1
| | | | SVN-Revision: 35943
* cns3xxx: fix an rx irq handling corner caseFelix Fietkau2013-03-101-5/+5
| | | | | | | | | | | | | | | | When an rx interrupt comes in, rx interrupts are disabled and NAPI polling is scheduled. During the NAPI poll, the driver first processes received frames in the ring, then fills the dma descriptor slots with new buffers and calls tx complete, before finally re-enabling rx interrupts and completing NAPI (if below the budget). If the hardware rx queue overflows before the napi complete is called, the hardware will not throw any further rx interrupts and rx processing stops completely. Fix this by keeping NAPI polling scheduled until it completes a poll without receiving any packets, and also handle NAPI completion before refilling rx or completing tx. SVN-Revision: 35942
* cns3xxx: fix ethernet driver memory barrier usageFelix Fietkau2013-03-101-5/+8
| | | | SVN-Revision: 35941
* cns3xxx: reduce buffer allocation size to 2048 bytes, improves ethernet ↵Felix Fietkau2013-03-101-1/+1
| | | | | | performance SVN-Revision: 35917
* cns3xxx: add linux 3.8 support and use it by defaultFelix Fietkau2013-03-095-13/+13
| | | | SVN-Revision: 35908
* cns3xxx: fix dwc_otg driver compat with udc-coreFlorian Fainelli2012-12-041-83/+0
| | | | | | | | | | | function. This removes those from the dwc_otg driver and removes the patch that comments out the linkage of udc-core so that the dwc_otg driver can co-exist happily with other USB Device Controllers. Signed-off-by: Tim Harvey <tharvey@gateworks.com> Signed-off-by: Florian Fainelli <florian@openwrt.org> SVN-Revision: 34475
* split spi patch, follow mainline file namingImre Kaloz2012-11-121-0/+449
| | | | SVN-Revision: 34168
* split the i2c patch, merge the retry fixupImre Kaloz2012-11-121-0/+396
| | | | SVN-Revision: 34167
* cns3xxx: convert dwc_otg patches to filesLuka Perkov2012-11-1118-0/+22666
| | | | SVN-Revision: 34162
* cns3xxx: convert ethernet patches to filesLuka Perkov2012-11-113-0/+1378
SVN-Revision: 34161
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