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* Merge branch 'for_linus' of ↵Linus Torvalds2010-10-27
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: (24 commits) quota: Fix possible oops in __dquot_initialize() ext3: Update kernel-doc comments jbd/2: fixed typos ext2: fixed typo. ext3: Fix debug messages in ext3_group_extend() jbd: Convert atomic_inc() to get_bh() ext3: Remove misplaced BUFFER_TRACE() in ext3_truncate() jbd: Fix debug message in do_get_write_access() jbd: Check return value of __getblk() ext3: Use DIV_ROUND_UP() on group desc block counting ext3: Return proper error code on ext3_fill_super() ext3: Remove unnecessary casts on bh->b_data ext3: Cleanup ext3_setup_super() quota: Fix issuing of warnings from dquot_transfer quota: fix dquot_disable vs dquot_transfer race v2 jbd: Convert bitops to buffer fns ext3/jbd: Avoid WARN() messages when failing to write the superblock jbd: Use offset_in_page() instead of manual calculation jbd: Remove unnecessary goto statement jbd: Use printk_ratelimited() in journal_alloc_journal_head() ...
| * quota: Fix possible oops in __dquot_initialize()Jan Kara2010-10-27
| | | | | | | | | | | | | | | | | | When quotaon(8) races with __dquot_initialize() or dqget() fails because of EIO, ENOSPC, or similar error, we could possibly dereference NULL pointer in inode->i_dquot[cnt]. Add proper checking. Reported-by: Dmitry Monakhov <dmonakhov@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3: Update kernel-doc commentsNamhyung Kim2010-10-27
| | | | | | | | | | | | | | Update missing/broken argument descriptions and fix formatting. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd/2: fixed typosAndrea Gelmini2010-10-27
| | | | | | | | | | | | | | "wakup" Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext2: fixed typo.Andrea Gelmini2010-10-27
| | | | | | | | | | | | | | "excpet" Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3: Fix debug messages in ext3_group_extend()Namhyung Kim2010-10-27
| | | | | | | | | | | | | | Fix a typo, break long lines and use E3FSBLK on ext3_fsblk_t. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd: Convert atomic_inc() to get_bh()Namhyung Kim2010-10-27
| | | | | | | | | | | | | | Convert atomic_inc(&bh->b_count) to get_bh(bh) for consistency. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3: Remove misplaced BUFFER_TRACE() in ext3_truncate()Namhyung Kim2010-10-27
| | | | | | | | | | Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd: Fix debug message in do_get_write_access()Namhyung Kim2010-10-27
| | | | | | | | | | | | | | 'buffer_head' should be 'journal_head'. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd: Check return value of __getblk()Namhyung Kim2010-10-27
| | | | | | | | | | | | | | | | | | Fail journal creation if __getblk() returns NULL. unlikely() is added because it is called in a loop and we've been OK without the check until now. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3: Use DIV_ROUND_UP() on group desc block countingNamhyung Kim2010-10-27
| | | | | | | | | | Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3: Return proper error code on ext3_fill_super()Namhyung Kim2010-10-27
| | | | | | | | | | Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3: Remove unnecessary casts on bh->b_dataNamhyung Kim2010-10-27
| | | | | | | | | | | | | | | | bh->b_data is already a pointer to char so casts to 'char *' should be meaningless. Remove them. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3: Cleanup ext3_setup_super()Namhyung Kim2010-10-27
| | | | | | | | | | | | | | | | | | Fix mount-count check to emit warning only if s_max_mnt_count is greater than 0 according to man tune2fs(8). Also removes unnecessary casts. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * quota: Fix issuing of warnings from dquot_transferJan Kara2010-10-27
| | | | | | | | | | | | | | | | | | | | __dquot_transfer accidentally called flush_warnings for a wrong set of dquots which could result in quota warnings being issued with a wrong identification. Also when operation fails because of EDQUOT, there's no need check for issuing information message about user getting below limits (no transfer has actually happened). Signed-off-by: Jan Kara <jack@suse.cz>
| * quota: fix dquot_disable vs dquot_transfer race v2Dmitry2010-10-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've got following lockup: dquot_disable dquot_transfer ->dqget() sb_has_quota_active dqopt->flags &= ~dquot_state_flag(f, cnt) atomic_inc(dq->dq_count) ->drop_dquot_ref(sb, cnt); down_write(dqptr_sem) inode->i_dquot[cnt] = NULL ->__dquot_transfer invalidate_dquots(sb, cnt); down_write(&dqptr_sem) ->wait for dq_wait_unused inode->i_dquot = new_dquot /* wait forever */ ^^^^New quota user^^^^^^ We cannot allow new references to dquots from inodes after drop_dquot_ref() has removed them. We have to recheck quota state under dqptr_sem and before assignment, as we do it in dquot_initialize(). Signed-off-by: Dmitry Monakhov <dmonakhov@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd: Convert bitops to buffer fnsNamhyung Kim2010-10-27
| | | | | | | | | | | | | | | | Convert set/clear_bit(BH_JWrite, ...) to set/clear_buffer_jwrite() for consistency. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3/jbd: Avoid WARN() messages when failing to write the superblockDarrick J. Wong2010-10-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a WARN backtrace in mark_buffer_dirty() that occurs during unmount when the underlying block device is removed. This bug has been seen on System Z when removing all paths from a multipath-backed ext3 mount; on System P when injecting enough PCI EEH errors to make the SCSI controller go offline; and similar warnings have been seen (and patched) with ext2/ext4. The super block update from a previous operation has marked the buffer as in error, and the flag has to be cleared before doing the update. Similar changes have been made to ext4 by commit 914258bf2cb22bf4336a1b1d90c551b4b11ca5aa. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd: Use offset_in_page() instead of manual calculationNamhyung Kim2010-10-27
| | | | | | | | | | Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd: Remove unnecessary goto statementNamhyung Kim2010-10-27
| | | | | | | | | | | | | | | | Remove goto statement which jumps to very next line. Also remove target label because it is no longer used anywhere. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd: Use printk_ratelimited() in journal_alloc_journal_head()Namhyung Kim2010-10-27
| | | | | | | | | | | | | | Use printk_ratelimited() instead of doing it manually. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * jbd: Move debug message into #ifdef areaNamhyung Kim2010-10-27
| | | | | | | | | | | | | | | | | | | | Move call to jbd_debug() into #ifdef CONFIG_JBD_DEBUG block because 'dropped' is declared there. The code could be compiled without this change anyway, simply because jbd_debug() expands to nothing if !CONFIG_JBD_DEBUG but IMHO it doesn't look good in general. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext2: fix comment on ext2_try_to_allocate()Namhyung Kim2010-10-27
| | | | | | | | | | | | | | | | @handle doesn't exist in ext2. Remove it. Also, fit comment header into kernel-doc format. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * ext3: Fix lost extented attributes for inode with ino == 11Jan Kara2010-10-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a filesystem has inode size > 128 and someone deletes lost+found and reuses inode 11 for some other file, extented attributes set for this inode before umount will get lost after remounting the filesystem. This is because extended attributes will get stored in an inode but ext3_iget will ignore them due to workaround of a bug in an old mkfs. Fix the problem by initializing i_extra_isize to 0 for freshly allocated inodes where mkfs workaround in ext3_iget applies. This way these inodes will always store extended attributes in a special block and no problems occur. The bug was spotted and a reproduction test provided by: Masayoshi MIZUMA <m.mizuma@jp.fujitsu.com> Reviewed-by: Andreas Dilger <adilger.kernel@dilger.ca> Signed-off-by: Jan Kara <jack@suse.cz>
| * quota: Make QUOTACTL config be selected by its usersJan Kara2010-10-05
| | | | | | | | | | | | | | | | | | Remove "depends on" line from QUOTACTL config option and rather select the option explicitely from config options which need it. It makes more sense this way and also fixes Kconfig warning due to GFS2 selecting QUOTACTL but QUOTACTL not depending on it. Signed-off-by: Jan Kara <jack@suse.cz>
* | Merge branch 'next' of ↵Linus Torvalds2010-10-27
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * | DMAENGINE: move COH901318 to arch_initcallLinus Walleij2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | dma: imx-dma: fix signedness bugSascha Hauer2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | Merge branch 'dma40' into dmaengineDan Williams2010-10-19
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| | * | ste_dma40: remove channel_typeRabin Vincent2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It has been replaced with separate fields. 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>
| | * | ste_dma40: remove enum for endianessRabin Vincent2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | * | ste_dma40: remove TIM_FOR_LINK optionRabin Vincent2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This does not seem to be implemented. 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>
| | * | ste_dma40: move mode_opt to separate configRabin Vincent2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | * | ste_dma40: move channel mode to a separate fieldRabin Vincent2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | * | ste_dma40: move priority to separate fieldRabin Vincent2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | * | ste_dma40: add variable to indicate valid dma_cfgRabin Vincent2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | | dma/timberdale: simplify conditionalNicolas Kaiser2010-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | | async_tx: make async_tx channel switching opt-inDan Williams2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | | move async raid6 test to lib/Kconfig.debugDan Williams2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The prompt for "Self test for hardware accelerated raid6 recovery" does not belong in the top level configuration menu. All the options in crypto/async_tx/Kconfig are selected and do not depend on CRYPTO. Kconfig.debug seems like a reasonable fit. Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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| *-----. \ \ Merge branches 'dma40', 'pl08x', 'fsldma', 'imx' and 'intel-mid' into dmaengineDan Williams2010-10-07
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| | | | | * | intel_mid_dma: change the slave interfaceKoul, Vinod2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | | | | * | intel_mid_dma: fix the WARN_ONsKoul, Vinod2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | | | | * | intel_mid_dma: Add sg list support to DMA driverRamesh Babu K V2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | | | | * | intel_mid_dma: Allow DMAC2 to share interruptYong Wang2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | | | | * | intel_mid_dma: Allow IRQ sharingYong Wang2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | intel_mid_dma driver allows interrupt sharing. Thus it needs to check whether IRQ source is the DMA controller and return the appropriate IRQ return. 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>
| | | | | * | intel_mid_dma: Add runtime PM supportKoul, Vinod2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds runtime PM support in this dma driver for 4 PCI Controllers Whenever the driver is idle (no channels grabbed), it can go to low power state It also adds the PCI suspend and resume support 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>
| | | | * | | dmaengine: Add Freescale i.MX1/21/27 DMA driverSascha Hauer2010-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| | | | * | | dmaengine: Add Freescale i.MX SDMA supportSascha Hauer2010-10-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for the Freescale i.MX SDMA engine. The SDMA engine is a scatter/gather DMA engine which is implemented as a seperate coprocessor. SDMA needs its own firmware which is requested using the standard request_firmware mechanism. The firmware has different entry points for each peripheral type, so drivers have to pass the peripheral type to the DMA engine which in turn picks the correct firmware entry point from a table contained in the firmware image itself. The original Freescale code also supports support for transfering data to the internal SRAM which needs different entry points to the firmware. Support for this is currently not implemented. Also, support for the ASRC (asymmetric sample rate converter) is skipped. I took a very simple approach to implement dmaengine support. Only a single descriptor is statically assigned to a each channel. This means that transfers can't be queued up but only a single transfer is in progress. This simplifies implementation a lot and is sufficient for the usual device/memory transfers. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Reviewed-by: Linus Walleij <linus.ml.walleij@gmail.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| | | | * | | dmaengine: add wrapper functions for device control functionsSascha Hauer2010-10-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add wrapper functions around the dma_device->device_control function to bring back type safety. Also, add a wrapper function around dma_async_tx_descriptor->tx_submit. This is named dmaengine_submit instead of dmaengine_tx_submit to get rid of the confusing 'tx' in the function name Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| | | | * | | dmaengine: add possibility for cyclic transfersSascha Hauer2010-10-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cyclic transfers are useful for audio where a single buffer divided in periods has to be transfered endlessly until stopped. After being prepared the transfer is started using the dma_async_descriptor->tx_submit function. dma_async_descriptor->callback is called after each period. The transfer is stopped using the DMA_TERMINATE_ALL callback. While being used for cyclic transfers the channel cannot be used for other transfer types. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-13 02:59:17 -0500