- 11 Oct, 2006 27 commits
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Linas Vepstas authored
Bugfix: rx descriptor release function fails to visit the last entry while walking receive descriptor ring. Signed-off-by:
Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Jeff Garzik <jeff@garzik.org>
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Linas Vepstas authored
The ring buffer descriptors are DMA-accessed bidirectionally, but are not declared in this way. Fix this. Signed-off-by:
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Linas Vepstas authored
Cosmetic patch: give the variable holding the numer of descriptors a more descriptive name, so to avoid confusion. Signed-off-by:
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Linas Vepstas authored
The current code attempts to start the TX dma every time a packet is queued. This is too conservative, and wastes CPU time. This patch changes behaviour to call the kick-dma function less often, only when the tx queue is at risk of emptying. This reduces cpu usage, improves performance. Signed-off-by:
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Linas Vepstas authored
Remove a dummy register read that is not needed. This reduces CPU usage notably during transmit. Signed-off-by:
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Linas Vepstas authored
The transmit side of the spider ethernet driver currently places locks around some very large chunks of code. This results in a fair amount of lock contention is some cases. This patch makes the locks much more fine-grained, protecting only the cirtical sections. One lock is used to protect three locations: the queue head and tail pointers, and the queue low-watermark location. Signed-off-by:
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Linas Vepstas authored
This patch moves transmit queue cleanup code out of the interrupt context, and into the NAPI polling routine. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Cc: James K Lewis <jklewis@us.ibm.com> Signed-off-by:
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Linas Vepstas authored
Implement basic low-watermark support for the transmit queue. Hardware low-watermarks allow a properly configured kernel to continously stream data to a device and not have to handle any interrupts at all in doing so. Correct zero-interrupt operation can be actually observed for this driver, when the socket buffer is made large enough. The basic idea of a low-watermark interrupt is as follows. The device driver queues up a bunch of packets for the hardware to transmit, and then kicks the hardware to get it started. As the hardware drains the queue of pending, untransmitted packets, the device driver will want to know when the queue is almost empty, so that it can queue some more packets. If the queue drains down to the low waterark, then an interrupt will be generated. However, if the kernel/driver continues to add enough packets to keep the queue partially filled, no interrupt will actually be generated, and the hardware can continue streaming packets indefinitely in this mode. The impelmentation is done by setting the DESCR_TXDESFLG flag in one of the packets. When the hardware sees this flag, it will interrupt the device driver. Because this flag is on a fixed packet, rather than at fixed location in the queue, the code below needs to move the flag as more packets are queued up. This implementation attempts to keep the flag at about 1/4 from "empty". Signed-off-by:
James K Lewis <jklewis@us.ibm.com> Acked-by:
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Linas Vepstas authored
Bugfix -- the rx chain is in memory after the tx chain -- the offset being used was wrong, resulting in memory corruption when the size of the rx and tx rings weren't exactly the same. Signed-off-by:
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Linas Vepstas authored
Turn off mis-interpretation of the queue-empty interrupt status bit as an error. Signed-off-by:
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Linas Vepstas authored
The print message associated with the descriptor chain end interrupt prints a bogs value. Fix that. Signed-off-by:
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Linas Vepstas authored
The current receive interrupt mask sets a bogus bit that doesn't even belong to the definition of this register. Remove it. Signed-off-by:
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Linas Vepstas authored
This patch adds a call to netif_stop_queue() when there is no more room for more packets on the transmit queue. Signed-off-by:
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Linas Vepstas authored
This patch fixes the names of a few fields in the DMA control register. There is no functional change. Signed-off-by:
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Linas Vepstas authored
Set the netdev watchdog timer. Signed-off-by:
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Linas Vepstas authored
Polite device drivers pad short packets to 60 bytes, so that mean-spirited users don't accidentally DOS some other OS that can't handle short packets. Signed-off-by:
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Linas Vepstas authored
Bugfix: when cleaning up the transmit queue upon device close, be sure to walk the entire queue. Signed-off-by:
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Linas Vepstas authored
The module param permsissions should bw read-only, not writable. From: James K Lewis <jklewis@us.ibm.com> Signed-off-by:
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Linas Vepstas authored
This patch increases the Burst Address alignment from 64 to 1024 in the Spidernet driver. This improves transmit performance for large packets. From: James K Lewis <jklewis@us.ibm.com> Signed-off-by:
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Linas Vepstas authored
This patch adds version information as reported by ethtool -i to the Spidernet driver. From: James K Lewis <jklewis@us.ibm.com> Signed-off-by:
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Jan-Bernd Themann authored
This patch includes a bug fix for the port state notification and fixes the default queue sizes. Signed-off-by:
Jan-Bernd Themann <themann@de.ibm.com> Signed-off-by:
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Jan-Bernd Themann authored
This eHEA patch covers required changes related to Anton Blanchard's new hvcall interface. Signed-off-by:
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Andrew Morton authored
drivers/net/ibmveth.c:939: error: too many arguments to function `ibmveth_interrupt' Cc: Jeff Garzik <jeff@garzik.org> Cc: Anton Blanchard <anton@samba.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Michael Buesch authored
This fixes eeprom read on big-endian architectures. readw returns the data in CPU order. With cpu_to_le16 we convert it to little endian, because "ptr" is a pointer to a _byte_ arrray. See the cast above. A byte array is little endian. The bug is: Reading u16 values with readw, casting them into an u8 array and accessing this u8 array as an u8 (byte) array. The correct fix is to swap the CPU-ordering value returned by readw into little endian, as the u8 array is little endian. This compiles to nothing on little endian hardware (so it does not change b44 code on LE hardware), but _fixes_ code on BE hardware. Signed-off-by:
Michael Buesch <mb@bu3sch.de> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by:
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Deepak Saxena authored
We need to specify a Versatile-specific SMC_IRQ_FLAGS value or the new generic IRQ layer will complain thusly: No IRQF_TRIGGER set_type function for IRQ 25 (<NULL>) Signed-off-by:
Deepak Saxena <dsaxena@plexity.net> Cc: Jeff Garzik <jeff@garzik.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Nicolas Pitre <nico@cam.org> Signed-off-by:
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Jeff Garzik authored
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Linus Torvalds authored
This is needed by at least the Mac Mini's, which (incorrectly) come back from suspend with SCI_EN clear. Thanks to Frdric Riss for hunting this down. Acked-by:
Frdric Riss <frederic.riss@gmail.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <len.brown@intel.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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- 10 Oct, 2006 13 commits
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Jeff Garzik authored
The error path path mistakenly called sysfs_create_group() rather than sysfs_remove_group(). They take the same arguments, so it's easy to cut-n-paste such a bug. Signed-off-by:
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Jeff Garzik authored
- fix: toshoboe_invalid_dev() was recently removed, but not all callers were updated, causing the obvious linker error. Remove caller, because the check (like the one removed) isn't used. - fix: propagate request_irq() return value - cleanup: remove void* casts - cleanup: remove impossible ASSERTs Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds authored
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix windfarm platform device usage [POWERPC] Fix i2c-powermac platform device usage [POWERPC] Fix secondary CPU startup on old "powersurge" SMP powermacs [POWERPC] ARCH=ppc pt_regs fixes [POWERPC] Update maple defconfig [POWERPC] Fix Maple secondary IDE interrupt [POWERPC] Make U4 PCIe work on maple [POWERPC] cell: fix default zImage build target [POWERPC] Fix boot wrapper invocation if CROSS_COMPILE contains spaces [POWERPC] Fix xmon IRQ handler for pt_regs removal
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Al Viro authored
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Al Viro authored
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Alexey Dobriyan authored
Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Al Viro authored
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Al Viro authored
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Al Viro authored
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Al Viro authored
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Al Viro authored
split the data structures that exist in host- and disk-endian variants, annotate the fields of disk-endian ones, propagate changes. Signed-off-by:
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Al Viro authored
inode->mode is disk-endian Signed-off-by:
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