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47ec7f09bc
linux/Documentation/driver-api
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Dave Jiang 47ec7f09bc dmaengine: cookie bypass for out of order completion 
The cookie tracking in dmaengine expects all submissions completed in
order. Some DMA devices like Intel DSA can complete submissions out of
order, especially if configured with a work queue sharing multiple DMA
engines. Add a status DMA_OUT_OF_ORDER that tx_status can be returned for
those DMA devices. The user should use callbacks to track the completion
rather than the DMA cookie. This would address the issue of dmatest
complaining that descriptors are "busy" when the cookie count goes
backwards due to out of order completion. Add DMA_COMPLETION_NO_ORDER
DMA capability to allow the driver to flag the device's ability to complete
operations out of order.

Reported-by: Swathi Kovvuri <swathi.kovvuri@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Tested-by: Swathi Kovvuri <swathi.kovvuri@intel.com>
Link: https://lore.kernel.org/r/158939557151.20335.12404113976045569870.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-06-17 19:45:14 +05:30
..
80211 docs: prevent warnings due to autosectionlabel 2020-03-20 17:01:29 -06:00
acpi Replace HTTP links with HTTPS ones: documentation 2020-06-08 09:30:19 -06:00
backlight docs: lp855x-driver.rst: add it to the driver-api book 2019-07-15 11:03:02 -03:00
dmaengine dmaengine: cookie bypass for out of order completion 2020-06-17 19:45:14 +05:30
driver-model A handful of late-arriving docs fixes, along with a patch changing a lot of 2020-06-10 14:12:15 -07:00
early-userspace docs: add SPDX tags to new index files 2019-07-15 11:03:03 -03:00
firmware Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2020-03-30 16:13:08 -07:00
fpga docs: fpga: document programming fpgas using regions 2018-10-16 11:13:50 +02:00
gpio gpiolib: Add support for GPIO lookup by line name 2020-05-18 10:12:42 +02:00
i3c docs: driver-api: Add I3C documentation 2018-11-12 10:33:49 +01:00
iio iio: core: drop devm_iio_trigger_free() API call 2020-04-19 16:56:37 +01:00
md docs: add SPDX tags to new index files 2019-07-15 11:03:03 -03:00
media media: v4l2-subdev.rst: correct information about v4l2 events 2020-06-11 19:20:26 +02:00
mei mei: docs: update mei documentation 2019-06-06 16:51:37 +02:00
memory-devices docs: add SPDX tags to new index files 2019-07-15 11:03:03 -03:00
mmc docs: add SPDX tags to new index files 2019-07-15 11:03:03 -03:00
mtd docs: mtd: Update spi nor reference driver 2019-09-06 08:51:39 -06:00
nfc docs: add SPDX tags to new index files 2019-07-15 11:03:03 -03:00
nvdimm doc: nvdimm: remove reference to non-existent CONFIG_NFIT_TEST 2020-04-28 12:46:07 -06:00
pci Documentation: Kill all references to mmiowb() 2019-04-08 12:00:45 +01:00
phy docs: phy: Drop duplicate 'be made' 2019-07-26 08:15:26 -06:00
pm Merge branch 'pm-cpuidle' 2020-06-01 15:19:30 +02:00
rapidio docs: add SPDX tags to new index files 2019-07-15 11:03:03 -03:00
serial tty: n_gsm: add ioctl to map serial device to mux'ed tty 2019-09-04 12:43:54 +02:00
soundwire soundwire: bus: rename sdw_bus_master_add/delete, add arguments 2020-05-19 12:44:34 +05:30
thermal doc: thermal: add cpu-idle-cooling to index tree 2020-05-05 09:57:14 -06:00
usb Replace HTTP links with HTTPS ones: documentation 2020-06-08 09:30:19 -06:00
xilinx docs: driver-api: add xilinx driver API documentation 2019-07-15 11:03:02 -03:00
basics.rst docs: Do not seek comments in kernel/rcu/tree_plugin.h 2019-05-24 14:23:40 -06:00
clk.rst docs: clk: fix struct syntax 2019-06-07 11:35:15 -06:00
component.rst drm/doc: document recommended component helper usage 2019-02-19 12:22:24 +01:00
connector.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
console.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
dcdbas.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
devfreq.rst docs: Add initial documentation for devfreq 2019-11-19 13:16:53 -07:00
device_connection.rst Documentation: driver-api: fix device_connection.rst kernel-doc error 2018-04-27 17:17:34 -06:00
device_link.rst driver core: Add support for linking devices during device addition 2019-10-04 17:29:50 +02:00
device-io.rst Documentation: Kill all references to mmiowb() 2019-04-08 12:00:45 +01:00
dma-buf.rst dma-buf: Couple of documentation typo fixes 2020-04-20 17:00:34 -06:00
edac.rst
eisa.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
firewire.rst FireWire: add driver-api Introduction section 2018-09-06 09:41:16 -06:00
frame-buffer.rst
generic-counter.rst docs: driver-api: generic-counter: Update Count and Signal data types 2019-10-18 19:47:38 +01:00
hsi.rst
i2c.rst
index.rst media updates for v5.8-rc1 2020-06-03 20:59:38 -07:00
infiniband.rst RDMA/core: Remove FMR pool API 2020-06-02 20:32:53 -03:00
infrastructure.rst docs: No structured comments in kernel/dma/coherent.c 2019-10-01 08:43:21 -06:00
input.rst
interconnect.rst interconnect: Add interconnect_graph file to debugfs 2019-12-16 09:49:54 +02:00
io_ordering.rst Documentation: Add io_ordering.rst to driver-api manual 2020-03-10 11:33:19 -06:00
io-mapping.rst Documentation: Add io-mapping.rst to driver-api manual 2020-03-10 11:33:15 -06:00
ioctl.rst docs: move core-api/ioctl.rst to driver-api/ 2020-03-10 11:21:08 -06:00
ipmb.rst drivers: ipmi: Support raw i2c packet in IPMB 2019-12-11 13:21:36 -06:00
ipmi.rst docs: move IPMI.txt to the driver API book 2020-05-15 11:55:04 -06:00
isa.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
isapnp.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
libata.rst scsi: docs: convert scsi_eh.txt to ReST 2020-03-11 23:08:01 -04:00
lightnvm-pblk.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
men-chameleon-bus.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
message-based.rst
misc_devices.rst
miscellaneous.rst
mtdnand.rst mtd: rawnand: Stop using nand_release() 2020-05-31 10:53:40 +02:00
ntb.rst New feature to add support for NTB virtual MSI interrupts, the ability 2019-07-21 09:46:59 -07:00
nvmem.rst nvmem: core: add nvmem_device_find 2019-10-07 09:47:37 -07:00
parport-lowlevel.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
pinctl.rst docs/pinctrl: fix compile errors in example code 2019-07-29 00:20:09 +02:00
pps.rst docs: driver-api: add remaining converted dirs to it 2019-07-15 11:03:03 -03:00
pti_intel_mid.rst docs: driver-api: pti_intel_mid: Enable syntax highlighting for C code block 2019-10-18 09:40:13 -06:00
ptp.rst docs: driver-api: add remaining converted dirs to it 2019-07-15 11:03:03 -03:00
pwm.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
regulator.rst
rfkill.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
s390-drivers.rst docs: s390: convert docs to ReST and rename to *.rst 2019-06-11 09:48:14 +02:00
scsi.rst scsi: target: add driver-api document 2018-04-20 19:14:40 -04:00
slimbus.rst slimbus: stream: add stream support 2018-07-07 17:25:23 +02:00
sm501.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
smsc_ece1099.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
sound.rst
spi.rst
switchtec.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
sync_file.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
target.rst docs: No structured comments in target_core_device.c 2019-05-24 15:01:30 -06:00
uio-howto.rst uio: Documentation: Add information on using uio_pdrv_genirq with DT 2019-09-04 13:42:43 +02:00
vfio-mediated-device.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
vfio.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
vme.rst
w1.rst docs: driver-api: address duplicate label warning 2020-04-07 13:41:34 -06:00
xillybus.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
zorro.rst docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00