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
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
- add building of a standard uImage along with the combined kernel+rootfs
- remove 'old' image build - that was for a very old and obsolete bootloader
To update the bootloader for GW2387,GW2388,GW2391 (NOR Flash) from uboot:
put latest NOR bootloader on tftp server:
http://svn.gateworks.com/laguna/trunk/images/u-boot_nor.bin
Laguna> setenv ipaddr <localip>
Laguna> setenv ipaddr <serverip>
Laguna> tftpboot 0x800000 laguna/u-boot-nor.bin
Laguna> erase 0x10000000 +$(filesize)
Laguna> cp.b 0x800000 0x10000000 $(filesize)
Laguna> reset
To update the bootloader for GW2380,GW2382,GW2383 (SPI Flash) from uboot:
put latest SPI bootloader on tftp server:
http://svn.gateworks.com/laguna/trunk/images/u-boot_spi.bin
Laguna> setenv ipaddr <localip>
Laguna> setenv ipaddr <serverip>
Laguna> tftpboot 0x800000 laguna/u-boot-spi.bin
Laguna> erase 0x60000000 +$(filesize)
Laguna> cp.b 0x800000 0x60000000 $(filesize)
Laguna> reset
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
SVN-Revision: 38703
In order to support both normal images and initramfs, ensure that each
target sets KERNELNAME properly so that the generic kernel building code
can copy the corresponding files over $(KDIR) with the appropriate
extension. Update the various paths to the kernel and wrapper images
from $(LINUX_DIR)/arch/$(ARCH)/boot/$(foo) to $(KDIR)/$(foo).
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 37049
Update ehci/ohci driver registration to conform to the new platform
drivers.
This fixes missing USB host support in 3.8.x
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
SVN-Revision: 36309
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
L2 cache via L2X0 cache controller available on some ARM boards can
provide a performance boost in some situations but decrease performance
in others. This adds a kernel cmdline to disable L2X0 for cns3xxx based
boards.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
SVN-Revision: 34874
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
Combine two pcie patches (2nd patch undid the 1st patch) together
and refresh the other affected patches
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
SVN-Revision: 34132
Many Laguna products have on-board GPS with Pulse-per-second (PPS)
support. This patch adds kernel support (statically) and adds
the platform data in laguna board support.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
SVN-Revision: 34115
Felix Fietkau
Imre Kaloz
Florian Fainelli
Gabor Juhos
Luka Perkov