fbf54dd320
This patch updates some of the documentation about DMA buffer management for USB, and ways to avoid extra copying. Our understanding of the issues has improved over time. - Most drivers should *avoid* the dma-coherent allocators. There are a few exceptions (like the HID driver). - Some methods are currently commented out; it seems folk writing USB drivers aren't doing performance tuning at that level yet. - Just avoid highmem; there's no good way to pass an "I can do highmem DMA" capability through a driver stack. This is easy, everything already avoids highmem. But it'd be nice if x86_32 systems with much physical memory could use it directly with network adapters and mass storage devices. (Patch, anyone?) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
||
|---|---|---|
| .. | ||
| ABI | ||
| DocBook | ||
| RCU | ||
| accounting | ||
| aoe | ||
| arm | ||
| auxdisplay | ||
| blackfin | ||
| block | ||
| cdrom | ||
| connector | ||
| console | ||
| cpu-freq | ||
| cris | ||
| crypto | ||
| device-mapper | ||
| driver-model | ||
| drivers/edac | ||
| dvb | ||
| early-userspace | ||
| fault-injection | ||
| fb | ||
| filesystems | ||
| firmware_class | ||
| fujitsu/frv | ||
| hrtimer | ||
| hrtimers | ||
| hwmon | ||
| i2c | ||
| i2o | ||
| i386 | ||
| ia64 | ||
| infiniband | ||
| input | ||
| ioctl | ||
| isdn | ||
| kbuild | ||
| kdump | ||
| m68k | ||
| mips | ||
| netlabel | ||
| networking | ||
| parisc | ||
| pcmcia | ||
| power | ||
| powerpc | ||
| s390 | ||
| scsi | ||
| serial | ||
| sh | ||
| sound | ||
| sparc | ||
| spi | ||
| sysctl | ||
| telephony | ||
| uml | ||
| usb | ||
| video4linux | ||
| vm | ||
| w1 | ||
| watchdog | ||
| x86_64 | ||
| 00-INDEX | ||
| BUG-HUNTING | ||
| Changes | ||
| CodingStyle | ||
| DMA-API.txt | ||
| DMA-ISA-LPC.txt | ||
| DMA-mapping.txt | ||
| HOWTO | ||
| IO-mapping.txt | ||
| IPMI.txt | ||
| IRQ-affinity.txt | ||
| IRQ.txt | ||
| MSI-HOWTO.txt | ||
| ManagementStyle | ||
| PCIEBUS-HOWTO.txt | ||
| README.DAC960 | ||
| README.cycladesZ | ||
| SAK.txt | ||
| SM501.txt | ||
| SecurityBugs | ||
| SubmitChecklist | ||
| SubmittingDrivers | ||
| SubmittingPatches | ||
| VGA-softcursor.txt | ||
| applying-patches.txt | ||
| atomic_ops.txt | ||
| basic_profiling.txt | ||
| binfmt_misc.txt | ||
| cachetlb.txt | ||
| cciss.txt | ||
| cli-sti-removal.txt | ||
| computone.txt | ||
| cpqarray.txt | ||
| cpu-hotplug.txt | ||
| cpu-load.txt | ||
| cpusets.txt | ||
| cputopology.txt | ||
| dcdbas.txt | ||
| debugging-modules.txt | ||
| dell_rbu.txt | ||
| devices.txt | ||
| digiepca.txt | ||
| dnotify.txt | ||
| dontdiff | ||
| ecryptfs.txt | ||
| eisa.txt | ||
| exception.txt | ||
| feature-removal-schedule.txt | ||
| floppy.txt | ||
| gpio.txt | ||
| hayes-esp.txt | ||
| highuid.txt | ||
| hpet.txt | ||
| hw_random.txt | ||
| ide.txt | ||
| initrd.txt | ||
| io_ordering.txt | ||
| ioctl-number.txt | ||
| iostats.txt | ||
| irqflags-tracing.txt | ||
| isapnp.txt | ||
| java.txt | ||
| kernel-doc-nano-HOWTO.txt | ||
| kernel-docs.txt | ||
| kernel-parameters.txt | ||
| keys-request-key.txt | ||
| keys.txt | ||
| kobject.txt | ||
| kprobes.txt | ||
| kref.txt | ||
| laptop-mode.txt | ||
| ldm.txt | ||
| leds-class.txt | ||
| local_ops.txt | ||
| lockdep-design.txt | ||
| locks.txt | ||
| logo.gif | ||
| logo.txt | ||
| magic-number.txt | ||
| mandatory.txt | ||
| mca.txt | ||
| md.txt | ||
| memory-barriers.txt | ||
| memory.txt | ||
| mono.txt | ||
| moxa-smartio | ||
| mtrr.txt | ||
| mutex-design.txt | ||
| nbd.txt | ||
| nfsroot.txt | ||
| nmi_watchdog.txt | ||
| nommu-mmap.txt | ||
| numastat.txt | ||
| oops-tracing.txt | ||
| paride.txt | ||
| parport-lowlevel.txt | ||
| parport.txt | ||
| pci-error-recovery.txt | ||
| pci.txt | ||
| pcieaer-howto.txt | ||
| pi-futex.txt | ||
| pm.txt | ||
| pnp.txt | ||
| power_supply_class.txt | ||
| preempt-locking.txt | ||
| prio_tree.txt | ||
| ramdisk.txt | ||
| rbtree.txt | ||
| riscom8.txt | ||
| robust-futex-ABI.txt | ||
| robust-futexes.txt | ||
| rocket.txt | ||
| rpc-cache.txt | ||
| rt-mutex-design.txt | ||
| rt-mutex.txt | ||
| rtc.txt | ||
| sched-arch.txt | ||
| sched-coding.txt | ||
| sched-design-CFS.txt | ||
| sched-design.txt | ||
| sched-domains.txt | ||
| sched-stats.txt | ||
| serial-console.txt | ||
| sgi-ioc4.txt | ||
| sgi-visws.txt | ||
| sharedsubtree.txt | ||
| smart-config.txt | ||
| smp.txt | ||
| sony-laptop.txt | ||
| sonypi.txt | ||
| sparse.txt | ||
| specialix.txt | ||
| spinlocks.txt | ||
| stable_api_nonsense.txt | ||
| stable_kernel_rules.txt | ||
| stallion.txt | ||
| svga.txt | ||
| sx.txt | ||
| sysfs-rules.txt | ||
| sysrq.txt | ||
| thinkpad-acpi.txt | ||
| time_interpolators.txt | ||
| tipar.txt | ||
| tty.txt | ||
| unicode.txt | ||
| unshare.txt | ||
| video-output.txt | ||
| volatile-considered-harmful.txt | ||
| voyager.txt | ||
| xterm-linux.xpm | ||
| zorro.txt | ||
README.cycladesZ
The Cyclades-Z must have firmware loaded onto the card before it will
operate. This operation should be performed during system startup,
The firmware, loader program and the latest device driver code are
available from Cyclades at
ftp://ftp.cyclades.com/pub/cyclades/cyclades-z/linux/