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2011-01-11Merge branch 'next' of ↵Linus Torvalds2-66/+123
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (72 commits) powerpc/pseries: Fix build of topology stuff without CONFIG_NUMA powerpc/pseries: Fix VPHN build errors on non-SMP systems powerpc/83xx: add mpc8308_p1m DMA controller device-tree node powerpc/83xx: add DMA controller to mpc8308 device-tree node powerpc/512x: try to free dma descriptors in case of allocation failure powerpc/512x: add MPC8308 dma support powerpc/512x: fix the hanged dma transfer issue powerpc/512x: scatter/gather dma fix powerpc/powermac: Make auto-loading of therm_pm72 possible of/address: Use propper endianess in get_flags powerpc/pci: Use printf extension %pR for struct resource powerpc: Remove unnecessary casts of void ptr powerpc: Disable VPHN polling during a suspend operation powerpc/pseries: Poll VPA for topology changes and update NUMA maps powerpc: iommu: Add device name to iommu error printks powerpc: Record vma->phys_addr in ioremap() powerpc: Update compat_arch_ptrace powerpc: Fix PPC_PTRACE_SETHWDEBUG on PPC_BOOK3S powerpc/time: printk time stamp init not correct powerpc: Minor cleanups for machdep.h ...
2011-01-07dma: shdma: don't register the global die notifier multiple timesGuennadi Liakhovetski1-9/+7
A recent patch has added a die notifier to the shdma driver, however, it registers a static die-notifier object in the probe routine, i.e., for each device instance. This is wrong and leads to a system lockup. This patch moves the die notifier registration to module init and exit routines respectively. Reported-by: Magnus Damm <damm@opensource.se> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-01-06Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds1-96/+78
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (416 commits) ARM: DMA: add support for DMA debugging ARM: PL011: add DMA burst threshold support for ST variants ARM: PL011: Add support for transmit DMA ARM: PL011: Ensure IRQs are disabled in UART interrupt handler ARM: PL011: Separate hardware FIFO size from TTY FIFO size ARM: PL011: Allow better handling of vendor data ARM: PL011: Ensure error flags are clear at startup ARM: PL011: include revision number in boot-time port printk ARM: vexpress: add sched_clock() for Versatile Express ARM i.MX53: Make MX53 EVK bootable ARM i.MX53: Some bug fix about MX53 MSL code ARM: 6607/1: sa1100: Update platform device registration ARM: 6606/1: sa1100: Fix platform device registration ARM i.MX51: rename IPU irqs ARM i.MX51: Add ipu clock support ARM: imx/mx27_3ds: Add PMIC support ARM: DMA: Replace page_to_dma()/dma_to_page() with pfn_to_dma()/dma_to_pfn() mx51: fix usb clock support MX51: Add support for usb host 2 arch/arm/plat-mxc/ehci.c: fix errors/typos ...
2011-01-06Merge branch 'devel-stable' into develRussell King1-96/+78
Conflicts: arch/arm/mach-pxa/clock.c arch/arm/mach-pxa/clock.h
2011-01-06Merge branch 'master' of ↵Paul Mundt11-26/+33
master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into sh-latest Conflicts: arch/sh/kernel/cpu/sh2a/clock-sh7201.c Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-01-05Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into ↵Russell King1-96/+78
devel-stable
2011-01-03Merge branch 'fixes' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: dmaengine: provide dummy functions for DMA_ENGINE=n mv_xor: fix race in tasklet function
2011-01-03mv_xor: fix race in tasklet functionSaeed Bishara1-1/+1
use mv_xor_slot_cleanup() instead of __mv_xor_slot_cleanup() as the former function aquires the spin lock that needed to protect the drivers data. Cc: <stable@kernel.org> Signed-off-by: Saeed Bishara <saeed@marvell.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-03Merge branch 'sgu/mxs-core-v8' of git://git.pengutronix.de/git/ukl/linux-2.6 ↵Sascha Hauer1-0/+1
into imx-for-2.6.38-new
2010-12-29powerpc/512x: try to free dma descriptors in case of allocation failureIlya Yanok1-34/+45
Currently completed descriptors are processed in the tasklet. This can lead to dead lock in case of CONFIG_NET_DMA enabled (new requests are submitted from softirq context and dma_memcpy_to_iovec() busy loops until the requests is submitted). To prevent this we should process completed descriptors from the allocation failure path in prepare_memcpy too. Signed-off-by: Ilya Yanok <yanok@emcraft.com> Cc: Piotr Ziecik <kosmo@semihalf.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29powerpc/512x: add MPC8308 dma supportIlya Yanok2-25/+72
MPC8308 has pretty much the same DMA controller as MPC5121 and this patch adds support for MPC8308 to the mpc512x_dma driver. Signed-off-by: Ilya Yanok <yanok@emcraft.com> Acked-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29powerpc/512x: fix the hanged dma transfer issueIlya Yanok1-6/+3
Current code clears interrupt active status _after_ submitting new transfers. This leaves a possibility of clearing the interrupt for this new transfer (if it is triggered fast enough) and thus lose this interrupt. We want to clear interrupt active status _before_ new transfers is submitted and for current channel only. Signed-off-by: Ilya Yanok <yanok@emcraft.com> Acked-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29powerpc/512x: scatter/gather dma fixIlya Yanok1-1/+3
While testing mpc512x-dma driver with dmatest module I've found that I can hang the mpc512x-dma issuing request from multiple threads to the single channel. insmod dmatest.ko max_channels=1 threads_per_chan=16 After investigating this case I've managed to find that this happens if and only if we have more than one queued requests. In this case the driver tries to make use of hardware scatter/gather functionality. I've found two problems with scatter/gather: 1. When TCD is copied form RAM to the TCD register space with memcpy_io() e_sg bit eventually gets cleared. This results in only first TCD being executed. I've added setting of e_sg bit explicitly in the TCD registers. BTW, what is the correct way to do this? (How can I use setbits with bitfield structure?) After that hardware loads consecutive TCDs and we hit the second issue. 2. Existing code clears int_maj bit in the last TCD so we never get an interrupt on transfer completion. With these fixes my tests with many threads of single channel succeed but tests that use many channels simultaneously still don't work reliable. Signed-off-by: Ilya Yanok <yanok@emcraft.com> Acked-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-17dma: shdma: NMI support.Paul Mundt2-18/+115
Presently DMA transfers are interrupted and aborted by the NMI. This implements some basic logic for more gracefully handling and clearing each controller's NMIF flag via the NMI die chain, needed to resume transfers post-NMI. Reported-by: Michael Szafranek <Michael.Szafranek@emtrion.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-14Merge branch 'fixes' of ↵Linus Torvalds10-25/+32
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: dmaengine: at_hdmac: fix buffer transfer size specification fsldma: fix issue of slow dma dmaengine i.MX SDMA: initialize on module_init dma : EG20T PCH: Fix miss-setting DMA descriptor intel_mid_dma: fix section mismatch warnings dmaengine: imx-sdma: fix bug in buffer descriptor initialization drivers/dma/ppc4xx: Use printf extension %pR for struct resource drivers/dma/ioat: Use the ccflag-y instead of EXTRA_CFLAGS drivers/dma/: Use the ccflag-y instead of EXTRA_CFLAGS dma: intel_mid_dma: fix double free on mid_setup_dma error path dma: imx-dma: fix imxdma_probe error path
2010-12-14dmaengine: at_hdmac: fix buffer transfer size specificationNicolas Ferre1-1/+1
Buffer transfer size is the number of transfers to be performed in relation with the width of the _source_ interface. So in the DMA_FROM_DEVICE case, it should be the register width that should be taken into account. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-13fsldma: fix issue of slow dmaForrest Shi2-3/+12
Fixed fsl dma slow issue by initializing dma mode register with bandwidth control. It boosts dma performance and should works with 85xx board. Signed-off-by: Forrest Shi <b29237@freescale.com> Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-07dmaengine i.MX SDMA: initialize on module_initSascha Hauer1-1/+1
The firmware framework gets initialized during fs_initcall time, so we are not allowed to call request_firmware earlier. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-07dma : EG20T PCH: Fix miss-setting DMA descriptorTomoya MORINAGA1-7/+8
Currently, in case of using scatter/gather mode, head of data is not sent to destination. The cause is second descriptor address is set to NEXT. The NEXT must have head of descriptor address. This patch sets head of descriptor address to the NEXT. Acked-by: Yong Wang <youg.y.wang@intel.com> Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> [dan.j.williams@intel.com: fixed up usage of virt_to_phys()] Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-04intel_mid_dma: fix section mismatch warningsDan Williams1-3/+3
Rename intel_mid_dma_pci to intel_mid_dma_pci_driver to pick up the applied annotations of that suffix. Reported-by: <major_Lee@wistron.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-04dmaengine: imx-sdma: fix bug in buffer descriptor initializationAnatolij Gustschin1-1/+1
Currently while submitting scatterlists with more than one SG entry the DMA buffer address from the first SG entry is inserted into all initialized DMA buffer descriptors. This is due to the typo in the for_each_sg() loop where the scatterlist pointer is used for obtaining the DMA buffer address and _not_ the SG list iterator. As a result all received data will be written only into the first DMA buffer while reading. While writing the data from the first DMA buffer is send to the device multiple times. This caused the filesystem destruction on the MMC card when using DMA in mxcmmc driver. Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-04drivers/dma/ppc4xx: Use printf extension %pR for struct resourceJoe Perches1-3/+2
Using %pR standardizes the struct resource output. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-04drivers/dma/ioat: Use the ccflag-y instead of EXTRA_CFLAGSTracey Dent1-1/+1
Changed Makefile to use <modules>-y instead of <modules>-objs. Following (documentation/kbuild/makefiles.txt). Signed-off-by: Tracey Dent <tdent48227@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-03dmaengine i.MX SDMA: Allow to run without firmwareSascha Hauer1-96/+78
The SDMA firmware consists of a ROM part and a RAM part. The ROM part is always present in the SDMA engine and is sufficient for many cases. This patch allows to pass in platform data containing the script addresses in ROM, so loading a firmware is optional now. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Dan Williams <dan.j.williams@intel.com>
2010-12-03drivers/dma/: Use the ccflag-y instead of EXTRA_CFLAGSTracey Dent1-2/+2
Use the ccflag-y flag instead of EXTRA_CFLAGS because EXTRA_CFLAGS is deprecated and should now be switched. According to (documentation/kbuild/makefiles.txt). Signed-off-by: Tracey Dent <tdent48227@gmail.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-03dma: intel_mid_dma: fix double free on mid_setup_dma error pathAxel Lin1-2/+0
We should not call kfree(dma) in mid_setup_dma error path because the memory is allocated in intel_mid_dma_probe and will be freed in intel_mid_dma_probe error path if mid_setup_dma return error. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-12-03dma: imx-dma: fix imxdma_probe error pathAxel Lin1-1/+1
otherwise, i will be -1 inside the latest iteration of the while loop. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-11-25dma: shdma: add a MODULE_ALIAS() to allow module autoloadingGuennadi Liakhovetski1-0/+1
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-29drivers/dma/Kconfig: add part number for Topcliff.Valdis.Kletnieks@vt.edu1-2/+2
Product codenames are OK, but once an actual product name is available, it should be referenced as well. http://ark.intel.com/chipset.aspx?familyID=52499 Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27Merge branch 'next' of ↵Linus Torvalds14-899/+5276
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (48 commits) DMAENGINE: move COH901318 to arch_initcall dma: imx-dma: fix signedness bug dma/timberdale: simplify conditional ste_dma40: remove channel_type ste_dma40: remove enum for endianess ste_dma40: remove TIM_FOR_LINK option ste_dma40: move mode_opt to separate config ste_dma40: move channel mode to a separate field ste_dma40: move priority to separate field ste_dma40: add variable to indicate valid dma_cfg async_tx: make async_tx channel switching opt-in move async raid6 test to lib/Kconfig.debug dmaengine: Add Freescale i.MX1/21/27 DMA driver intel_mid_dma: change the slave interface intel_mid_dma: fix the WARN_ONs intel_mid_dma: Add sg list support to DMA driver intel_mid_dma: Allow DMAC2 to share interrupt intel_mid_dma: Allow IRQ sharing intel_mid_dma: Add runtime PM support DMAENGINE: define a dummy filter function for ste_dma40 ...
2010-10-27NULL-terminate all pci_device_id tablesDzianis Kahanovich1-0/+1
NULL-terminating pci_device_id in pch_dma.c and scx200_acb.c for appying MODULE_DEVICE_TABLE (to publish modalias-es). Signed-off-by: Dzianis Kahanovich <mahatma@eu.by> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-10-22DMAENGINE: move COH901318 to arch_initcallLinus Walleij1-1/+1
After moving the PL022 driver to subsys_initcall() due to the need of having stuff like regulators on the other end of the SPI link, I noticed that the COH901318 DMA engine will get probed before the DMA engine, so move it to an arch_initcall(). Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-22dma: imx-dma: fix signedness bugSascha Hauer1-1/+3
mxdmac->channel was unsigned, so check (imxdmac->channel < 0) for failed imx_dma_request_by_prio() made no sence. Explicitly check signed values. Also, fix uninitialzed use of ret. Signed-off-by: Vasiliy Kulikov <segooon@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-22Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bklLinus Torvalds1-0/+1
* 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl: vfs: make no_llseek the default vfs: don't use BKL in default_llseek llseek: automatically add .llseek fop libfs: use generic_file_llseek for simple_attr mac80211: disallow seeks in minstrel debug code lirc: make chardev nonseekable viotape: use noop_llseek raw: use explicit llseek file operations ibmasmfs: use generic_file_llseek spufs: use llseek in all file operations arm/omap: use generic_file_llseek in iommu_debug lkdtm: use generic_file_llseek in debugfs net/wireless: use generic_file_llseek in debugfs drm: use noop_llseek
2010-10-19Merge branch 'dma40' into dmaengineDan Williams3-21/+50
2010-10-19dma/timberdale: simplify conditionalNicolas Kaiser1-1/+1
Simplify: ((a && b) || (!a && !b)) => (a == b) Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Acked-by: Jack Stone <jwjstone@fastmail.fm> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-19ste_dma40: remove enum for endianessRabin Vincent2-4/+6
A bool will suffice. The default is little endian. Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-19ste_dma40: move mode_opt to separate configRabin Vincent2-2/+33
Defaults are "basic mode" for physical channels, and "logical source logical destination" for logical channels. Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-19ste_dma40: move channel mode to a separate fieldRabin Vincent1-6/+2
And keep it logical by default. Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-19ste_dma40: move priority to separate fieldRabin Vincent1-1/+1
And keep it low priority by default. Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-19ste_dma40: add variable to indicate valid dma_cfgRabin Vincent1-8/+8
Since we want to reduce the amount of required channel configuration and remove channel_type, don't depend on it to indicate whether the configuration is valid. Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-15llseek: automatically add .llseek fopArnd Bergmann1-0/+1
All file_operations should get a .llseek operation so we can make nonseekable_open the default for future file operations without a .llseek pointer. The three cases that we can automatically detect are no_llseek, seq_lseek and default_llseek. For cases where we can we can automatically prove that the file offset is always ignored, we use noop_llseek, which maintains the current behavior of not returning an error from a seek. New drivers should normally not use noop_llseek but instead use no_llseek and call nonseekable_open at open time. Existing drivers can be converted to do the same when the maintainer knows for certain that no user code relies on calling seek on the device file. The generated code is often incorrectly indented and right now contains comments that clarify for each added line why a specific variant was chosen. In the version that gets submitted upstream, the comments will be gone and I will manually fix the indentation, because there does not seem to be a way to do that using coccinelle. Some amount of new code is currently sitting in linux-next that should get the same modifications, which I will do at the end of the merge window. Many thanks to Julia Lawall for helping me learn to write a semantic patch that does all this. ===== begin semantic patch ===== // This adds an llseek= method to all file operations, // as a preparation for making no_llseek the default. // // The rules are // - use no_llseek explicitly if we do nonseekable_open // - use seq_lseek for sequential files // - use default_llseek if we know we access f_pos // - use noop_llseek if we know we don't access f_pos, // but we still want to allow users to call lseek // @ open1 exists @ identifier nested_open; @@ nested_open(...) { <+... nonseekable_open(...) ...+> } @ open exists@ identifier open_f; identifier i, f; identifier open1.nested_open; @@ int open_f(struct inode *i, struct file *f) { <+... ( nonseekable_open(...) | nested_open(...) ) ...+> } @ read disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ read_no_fpos disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { ... when != off } @ write @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ write_no_fpos @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { ... when != off } @ fops0 @ identifier fops; @@ struct file_operations fops = { ... }; @ has_llseek depends on fops0 @ identifier fops0.fops; identifier llseek_f; @@ struct file_operations fops = { ... .llseek = llseek_f, ... }; @ has_read depends on fops0 @ identifier fops0.fops; identifier read_f; @@ struct file_operations fops = { ... .read = read_f, ... }; @ has_write depends on fops0 @ identifier fops0.fops; identifier write_f; @@ struct file_operations fops = { ... .write = write_f, ... }; @ has_open depends on fops0 @ identifier fops0.fops; identifier open_f; @@ struct file_operations fops = { ... .open = open_f, ... }; // use no_llseek if we call nonseekable_open //////////////////////////////////////////// @ nonseekable1 depends on !has_llseek && has_open @ identifier fops0.fops; identifier nso ~= "nonseekable_open"; @@ struct file_operations fops = { ... .open = nso, ... +.llseek = no_llseek, /* nonseekable */ }; @ nonseekable2 depends on !has_llseek @ identifier fops0.fops; identifier open.open_f; @@ struct file_operations fops = { ... .open = open_f, ... +.llseek = no_llseek, /* open uses nonseekable */ }; // use seq_lseek for sequential files ///////////////////////////////////// @ seq depends on !has_llseek @ identifier fops0.fops; identifier sr ~= "seq_read"; @@ struct file_operations fops = { ... .read = sr, ... +.llseek = seq_lseek, /* we have seq_read */ }; // use default_llseek if there is a readdir /////////////////////////////////////////// @ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier readdir_e; @@ // any other fop is used that changes pos struct file_operations fops = { ... .readdir = readdir_e, ... +.llseek = default_llseek, /* readdir is present */ }; // use default_llseek if at least one of read/write touches f_pos ///////////////////////////////////////////////////////////////// @ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read.read_f; @@ // read fops use offset struct file_operations fops = { ... .read = read_f, ... +.llseek = default_llseek, /* read accesses f_pos */ }; @ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, ... + .llseek = default_llseek, /* write accesses f_pos */ }; // Use noop_llseek if neither read nor write accesses f_pos /////////////////////////////////////////////////////////// @ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; identifier write_no_fpos.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, .read = read_f, ... +.llseek = noop_llseek, /* read and write both use no f_pos */ }; @ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write_no_fpos.write_f; @@ struct file_operations fops = { ... .write = write_f, ... +.llseek = noop_llseek, /* write uses no f_pos */ }; @ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; @@ struct file_operations fops = { ... .read = read_f, ... +.llseek = noop_llseek, /* read uses no f_pos */ }; @ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; @@ struct file_operations fops = { ... +.llseek = noop_llseek, /* no read or write fn */ }; ===== End semantic patch ===== Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Julia Lawall <julia@diku.dk> Cc: Christoph Hellwig <hch@infradead.org>
2010-10-13ioat2: fix performance regressionDan Williams1-1/+1
Commit 0793448 "DMAENGINE: generic channel status v2" changed the interface for how dma channel progress is retrieved. It inadvertently exported an internal helper function ioat_tx_status() instead of ioat_dma_tx_status(). The latter polls the hardware to get the latest completion state, while the helper just evaluates the current state without touching hardware. The effect is that we end up waiting for completion timeouts or descriptor allocation errors before the completion state is updated. iperf (before fix): [SUM] 0.0-41.3 sec 364 MBytes 73.9 Mbits/sec iperf (after fix): [SUM] 0.0- 4.5 sec 499 MBytes 940 Mbits/sec This is a regression starting with 2.6.35. Cc: <stable@kernel.org> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Cc: Linus Walleij <linus.walleij@stericsson.com> Cc: Maciej Sosnowski <maciej.sosnowski@intel.com> Reported-by: Richard Scobie <richard@sauce.co.nz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-07async_tx: make async_tx channel switching opt-inDan Williams2-4/+7
The majority of drivers in drivers/dma/ will never establish cross channel operation chains and do not need the extra overhead in struct dma_async_tx_descriptor. Make channel switching opt-in by default. Cc: Anatolij Gustschin <agust@denx.de> Cc: Ira Snyder <iws@ovro.caltech.edu> Cc: Linus Walleij <linus.walleij@stericsson.com> Cc: Saeed Bishara <saeed@marvell.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-07Merge branches 'dma40', 'pl08x', 'fsldma', 'imx' and 'intel-mid' into dmaengineDan Williams12-266/+4625
2010-10-07dmaengine: Add Freescale i.MX1/21/27 DMA driverSascha Hauer3-0/+431
This driver is currently implemented as a user to the old i.MX DMA API. This allows us to convert each user of the old API to the dmaengine API one by one. Once this is done the old DMA driver can be merged into the i.MX dmaengine driver. V2: remove some debug leftovers and unused variables Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-07intel_mid_dma: change the slave interfaceKoul, Vinod2-25/+52
In 2.6.36 kernel, dma slave control command was introduced, this patch changes the intel-mid-dma driver to this new kernel slave interface Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-07intel_mid_dma: fix the WARN_ONsKoul, Vinod1-3/+3
Moved the WARN_ON to BUG_ON, as WARN_ON if hit, can cause null pointer derefrences Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-07intel_mid_dma: Add sg list support to DMA driverRamesh Babu K V2-50/+247
For a very high speed DMA various periphral devices need scatter-gather list support. The DMA hardware support link list items. This list can be circular also (adding new flag DMA_PREP_CIRCULAR_LIST) Right now this flag is in driver header and should be moved to dmaengine header file eventually Signed-off-by: Ramesh Babu K V <ramesh.b.k.v@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-10-07intel_mid_dma: Allow DMAC2 to share interruptYong Wang1-4/+1
Allow DMAC2 to share interrupt since exclusive interrupt line for mrst DMAC2 is not provided on other platforms. Signed-off-by: Yong Wang <yong.y.wang@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 16:54:16 +0000