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path: root/drivers/dma
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2007-07-11I/OAT: fix I/OAT for kexecDan Aloni
Under kexec, I/OAT initialization breaks over busy resources because the previous kernel did not release them. I'm not sure this fix can be considered a complete one but it works for me. I guess something similar to the *_remove method should occur there.. Signed-off-by: Dan Aloni <da-x@monatomic.org> Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2007-07-11ioatdma: Remove the use of writeq from the ioatdma driverChris Leech
There's only one now anyway, and it's not in a performance path, so make it behave the same on 32-bit and 64-bit CPUs. Signed-off-by: Chris Leech <christopher.leech@intel.com>
2007-07-11ioatdma: Remove the wrappers around read(bwl)/write(bwl) in ioatdmaChris Leech
Signed-off-by: Chris Leech <christopher.leech@intel.com>
2007-07-11drivers/dma: handle sysfs errorsJeff Garzik
From: Jeff Garzik <jeff@garzik.org> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Chris Leech <christopher.leech@intel.com>
2007-07-11ioatdma: Push pending transactions to hardware more frequentlyChris Leech
Every 20 descriptors turns out to be to few append commands with newer/faster CPUs. Pushing every 4 still cuts down on MMIO writes to an acceptable level without letting the DMA engine run out of work. Signed-off-by: Chris Leech <christopher.leech@intel.com>
2007-06-28IOATDMA: fix section mismatchesRandy Dunlap
Rename struct pci_driver data so that false section mismatch warnings won't be produced. Sam, ISTM that depending on variable names is the weakest & worst part of modpost section checking. Should __init_refok work here? I got build errors when I tried to use it, probably because the struct pci_driver probe and remove methods are not marked "__init_refok". WARNING: drivers/dma/ioatdma.o(.data+0x10): Section mismatch: reference to .init.text: (between 'ioat_pci_drv' and 'ioat_pci_tbl') WARNING: drivers/dma/ioatdma.o(.data+0x14): Section mismatch: reference to .exit.text: (between 'ioat_pci_drv' and 'ioat_pci_tbl') Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Chris Leech <christopher.leech@intel.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-10[S390] Kconfig: unwanted menus for s390.Martin Schwidefsky
Disable some more menus in the configuration files that are of no interest to a s390 machine. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-03-16[PATCH] rm pointless dmaengine exportsDavid Brownell
This removes several pointless exports from drivers/dma/dmaengine.c; the dma_async_memcpy_*() functions are inlined by <linux/dmaengine.h> so those exports are inappropriate. It also moves the existing EXPORT_SYMBOL declarations next to their functions, so it's now trivial to confirm one-to-one correspondence between exports and nonstatic symbols. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-12-07[PATCH] slab: remove SLAB_KERNELChristoph Lameter
SLAB_KERNEL is an alias of GFP_KERNEL. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-10[PATCH] drivers/dma trivial annotationsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-07-21[I/OAT]: Remove pci_module_init() from Intel I/OAT DMA engineHenrik Kretzschmar
Changes pci_module_init() to pci_register_driver(). Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-03[IOAT]: fix kernel-doc in source filesRandy Dunlap
Fix kernel-doc warnings in drivers/dma/: - use correct function & parameter names - add descriptions where omitted Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-03[IOAT]: Fix a warning in ioatdmaBenoit Boissinot
drivers/dma/ioatdma.c: In function 'ioat_init_module': drivers/dma/ioatdma.c:830: warning: control reaches end of non-void function Signed-off-by: Benoit Boissinot <benoit.boissinot@ens-lyon.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-03[IOAT]: drivers/dma/iovlock.c: make num_pages_spanned() staticAdrian Bunk
This patch makes the needlessly global num_pages_spanned() static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-03[IOAT]: fix sparse ulong warningRandy Dunlap
Fix sparse warning: drivers/dma/ioatdma.c:444:32: warning: constant 0xFFFFFFFFFFFFFFC0 is so big it is unsigned long Also needs a MAINTAINERS entry. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-02[PATCH] irq-flags: misc drivers: Use the new IRQF_ constantsThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26[IOAT]: Do not dereference THIS_MODULE directly to set unsafe.David S. Miller
Use the __unsafe() macro instead. Noticed by Miles Lane. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17[I/OAT]: Do not use for_each_cpu().Andrew Morton
for_each_cpu() is going away (and is gone in -mm). Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17[I/OAT]: Utility functions for offloading sk_buff to iovec copiesChris Leech
Provides for pinning user space pages in memory, copying to iovecs, and copying from sk_buffs including fragmented and chained sk_buffs. Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17[I/OAT]: Setup the networking subsystem as a DMA clientChris Leech
Attempts to allocate per-CPU DMA channels Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17[I/OAT]: Move PCI_DEVICE_ID_INTEL_IOAT to linux/pci_ids.hDavid S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17[I/OAT]: ioatdma.c needs linux/dma-mapping.hDavid S. Miller
For DMA_*_MASK defines. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17[I/OAT]: Driver for the Intel(R) I/OAT DMA engineChris Leech
Adds a new ioatdma driver Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17[I/OAT]: DMA memcpy subsystemChris Leech
Provides an API for offloading memory copies to DMA devices Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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