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2021-08-29dmaengine: idxd: remove interrupt disable for cmd_lockDave Jiang
The cmd_lock spinlock is not being used in hard interrupt context. There is no need to disable irq when acquiring the lock. Convert all cmd_lock acquisition to plain spin_lock() calls. Reviewed-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162984027930.1939209.15758413737332339204.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-29dmaengine: idxd: fix setting up priv mode for dwqDave Jiang
DSA spec says WQ priv bit is 0 if the Privileged Mode Enable field of the PCI Express PASID capability is 0 and pasid is enabled. Make sure that the WQCFG priv field is set correctly according to usage type. Reject config if setting up kernel WQ type and no support. Also add the correct priv setup for a descriptor. Fixes: 484f910e93b4 ("dmaengine: idxd: fix wq config registers offset programming") Cc: Ramesh Thomas <ramesh.thomas@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162939084657.903168.14160019185148244596.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-29dmaengine: xilinx_dma: Set DMA mask for coherent APIsRadhey Shyam Pandey
The xilinx dma driver uses the consistent allocations, so for correct operation also set the DMA mask for coherent APIs. It fixes the below kernel crash with dmatest client when DMA IP is configured with 64-bit address width and linux is booted from high (>4GB) memory. Call trace: [ 489.531257] dma_alloc_from_pool+0x8c/0x1c0 [ 489.535431] dma_direct_alloc+0x284/0x330 [ 489.539432] dma_alloc_attrs+0x80/0xf0 [ 489.543174] dma_pool_alloc+0x160/0x2c0 [ 489.547003] xilinx_cdma_prep_memcpy+0xa4/0x180 [ 489.551524] dmatest_func+0x3cc/0x114c [ 489.555266] kthread+0x124/0x130 [ 489.558486] ret_from_fork+0x10/0x3c [ 489.562051] ---[ end trace 248625b2d596a90a ]--- Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Reviewed-by: Harini Katakam <harini.katakam@xilinx.com> Link: https://lore.kernel.org/r/1629363528-30347-1-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-29dmaengine: ti: k3-psil-j721e: Add entry for CSI2RXPratyush Yadav
The CSI2RX subsystem on J721E is serviced by UDMA via PSI-L to transfer frames to memory. It can have up to 32 threads per instance. J721E has two instances of the subsystem, so there are 64 threads total. Add them to the endpoint map. Signed-off-by: Pratyush Yadav <p.yadav@ti.com> Acked-by: Peter Ujfalusi <peter.ujflausi@gmail.com> Link: https://lore.kernel.org/r/20210819110106.31409-1-p.yadav@ti.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-29dmaengine: sh: Add DMAC driver for RZ/G2L SoCBiju Das
Add DMA Controller driver for RZ/G2L SoC. Based on the work done by Chris Brandt for RZ/A DMA driver. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Link: https://lore.kernel.org/r/20210806095322.2326-4-biju.das.jz@bp.renesas.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-25dmaengine: ioat: depends on !UMLJohannes Berg
Now that UML has PCI support, this driver must depend also on !UML since it pokes at X86_64 architecture internals that don't exist on ARCH=um. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/20210809112409.a3a0974874d2.I2ffe3d11ed37f735da2f39884a74c953b258b995@changeid Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-25dmaengine: idxd: set descriptor allocation size to threshold for swqDave Jiang
Since submission is sent to limited portal, the actual wq size for shared wq is set by the threshold rather than the wq size. When the wq type is shared, set the allocated descriptors to the threshold. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162827151733.3459223.3829837172226042408.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-25dmaengine: idxd: make submit failure path consistent on desc freeingDave Jiang
The submission path for dmaengine API does not do descriptor freeing on failure. Also, with the abort mechanism, the freeing of descriptor happens when the abort callback is completed. Therefore free descriptor on all error paths for submission call to make things consistent. Also remove the double free that would happen on abort in idxd_dma_tx_submit() call. Fixes: 6b4b87f2c31a ("dmaengine: idxd: fix submission race window") Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162827146072.3459011.10255348500504659810.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-12Merge tag 'imx-ecspi-5.15' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/drivers i.MX eCSPI errata handling for 5.15: It includes all required changes for handling i.MX6/7 eCSPI errata ERR009165, which causes FIFO transfer to be sent twice in DMA mode. Both SPI and DMA maintainers agree to merge it through arm-soc tree. * tag 'imx-ecspi-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: dmaengine: imx-sdma: add terminated list for freed descriptor in worker dmaengine: imx-sdma: add uart rom script dma: imx-sdma: add i.mx6ul compatible name dmaengine: imx-sdma: remove ERR009165 on i.mx6ul spi: imx: remove ERR009165 workaround on i.mx6ul spi: imx: fix ERR009165 dmaengine: imx-sdma: add mcu_2_ecspi script dmaengine: dma: imx-sdma: add fw_loaded and is_ram_script dmaengine: imx-sdma: remove duplicated sdma_load_context Revert "dmaengine: imx-sdma: refine to load context only once" Revert "ARM: dts: imx6: Use correct SDMA script for SPI cores" Revert "ARM: dts: imx6q: Use correct SDMA script for SPI5 core" Link: https://lore.kernel.org/r/20210809071838.GF30984@dragon Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-08-09Merge 5.14-rc5 into driver-core-nextGreg Kroah-Hartman
We need the driver core fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-06Merge tag 'dmaengine-fix-5.14' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine Pull dmaengine fixes from Vinod Koul: "A bunch of driver fixes, notably: - idxd driver fixes for submission race, driver remove sequence, setup sequence for MSIXPERM, array index and updating descriptor vector - usb-dmac, pm reference leak fix - xilinx_dma, read-after-free fix - uniphier-xdmac fix for using atomic readl_poll_timeout_atomic() - of-dma, router_xlate to return - imx-dma, generic dma fix" * tag 'dmaengine-fix-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: dmaengine: imx-dma: configure the generic DMA type to make it work dmaengine: of-dma: router_xlate to return -EPROBE_DEFER if controller is not yet available dmaengine: stm32-dmamux: Fix PM usage counter unbalance in stm32 dmamux ops dmaengine: stm32-dma: Fix PM usage counter imbalance in stm32 dma ops dmaengine: uniphier-xdmac: Use readl_poll_timeout_atomic() in atomic state dmaengine: idxd: fix submission race window dmaengine: idxd: fix sequence for pci driver remove() and shutdown() dmaengine: idxd: fix desc->vector that isn't being updated dmaengine: idxd: fix setup sequence for MSIXPERM table dmaengine: idxd: fix array index when int_handles are being used dmaengine: usb-dmac: Fix PM reference leak in usb_dmac_probe() dmaengine: xilinx_dma: Fix read-after-free bug when terminating transfers
2021-08-06dmaengine: idxd: remove interrupt flag for completion list spinlockDave Jiang
The list lock is never acquired in interrupt context. Therefore there is no need to disable interrupts. Remove interrupt flags for lock operations. Reviewed-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162826417450.3454650.3733188117742416238.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: acpi: Check for errors from acpi_register_gsi() separatelyAndy Shevchenko
While IRQ test agaist the returned variable in practice is a good enough there is still a room for theoretical mistake in case the vIRQ of the device contains the same error code that acpi_register_gsi() may return. Due to this, check for error code separately from matching the vIRQs. Besides that, append documentation to tell why acpi_gsi_to_irq() can't be used and we call acpi_register_gsi() instead. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20210802175532.54311-1-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: acpi: Avoid comparison GSI with Linux vIRQAndy Shevchenko
Currently the CRST parsing relies on the fact that on most of x86 devices the IRQ mapping is 1:1 with Linux vIRQ. However, it may be not true for some. Fix this by converting GSI to Linux vIRQ before checking it. Fixes: ee8209fd026b ("dma: acpi-dma: parse CSRT to extract additional resources") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20210730202715.24375-1-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: idxd: make I/O interrupt handler one shotDave Jiang
The interrupt thread handler currently loops forever to process outstanding completions. This causes either an "irq X: nobody cared" kernel splat or the NMI watchdog kicks in due to running too long in the function. The irq thread handler is expected to run again after exiting if there are interrupts fired while the thread handler is running. So the handler code can process all the completed I/O in a single pass and exit without losing the follow on completed I/O. Reviewed-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162802977005.3084234.11836261157026497585.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: idxd: clear block on fault flag when clear wqDave Jiang
The block on fault flag is not cleared when we disable or reset wq. This causes it to remain set if the user does not clear it on the next configuration load. Add clear of flag in dxd_wq_disable_cleanup() routine. Fixes: da32b28c95a7 ("dmaengine: idxd: cleanup workqueue config after disabling") Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162803023553.3086015.8158952172068868803.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: idxd: add capability check for 'block on fault' attributeDave Jiang
The device general capability has a bit that indicate whether 'block on fault' is supported. Add check to wq sysfs knob to check if cap exists before allowing user to toggle. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162802992615.3084999.12539468940404102898.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: xilinx: Add empty device_config functionMarek Vasut
Various DMA users call the dmaengine_slave_config() and expect it to succeed, but that can only succeed if .device_config is implemented. Add empty device_config function rather than patching all the places which use dmaengine_slave_config(). Signed-off-by: Marek Vasut <marex@denx.de> Cc: Akinobu Mita <akinobu.mita@gmail.com> Cc: Kedareswara rao Appana <appana.durga.rao@xilinx.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/20210804195140.61396-1-marex@denx.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: dw: Simplify DT property parserAndy Shevchenko
Since we converted internal data types to match DT, there is no need to have an intermediate conversion layer, hence drop a few conditionals and for loops for good. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Serge Semin <fancer.lancer@gmail.com> Tested-by: Serge Semin <fancer.lancer@gmail.com> Link: https://lore.kernel.org/r/20210802184355.49879-3-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: dw: Remove error message from DT parsing codeAndy Shevchenko
Users are a bit frightened of the harmless message that tells that DT is missed on ACPI-based platforms. Remove it for good, it will simplify the future conversion to fwnode and device property APIs. Fixes: a9ddb575d6d6 ("dmaengine: dw_dmac: Enhance device tree support") Depends-on: f5e84eae7956 ("dmaengine: dw: platform: Split OF helpers to separate module") BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199379 Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Serge Semin <fancer.lancer@gmail.com> Tested-by: Serge Semin <fancer.lancer@gmail.com> Link: https://lore.kernel.org/r/20210802184355.49879-1-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06dmaengine: idxd: Remove unused status variable in irq_process_work_list()Nathan Chancellor
status is no longer used within this block: drivers/dma/idxd/irq.c:255:6: warning: unused variable 'status' [-Wunused-variable] u8 status = desc->completion->status & DSA_COMP_STATUS_MASK; ^ 1 warning generated. Fixes: b60bb6e2bfc1 ("dmaengine: idxd: fix abort status check") Signed-off-by: Nathan Chancellor <nathan@kernel.org> Acked-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/20210802175820.3153920-1-nathan@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02dmaengine: idxd: Fix a possible NULL pointer dereferenceChristophe JAILLET
'device_driver_attach()' dereferences its first argument (i.e. 'alt_drv') so it must not be NULL. Simplify the error handling logic about NULL 'alt_drv' in order to be more robust and future-proof. Fixes: 568b2126466f ("dmaengine: idxd: fix uninit var for alt_drv") Fixes: 6e7f3ee97bbe ("dmaengine: idxd: move dsa_drv support to compatible mode") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/77f0dc4f3966591d1f0cffb614a94085f8895a85.1627560174.git.christophe.jaillet@wanadoo.fr Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02Merge branch 'fixes' into nextVinod Koul
2021-08-02dmaengine: imx-dma: configure the generic DMA type to make it workJuergen Borleis
Commit dea7a9fbb009 ("dmaengine: imx-dma: remove dma_slave_config direction usage") changes the method from a "configuration when called" to an "configuration when used". Due to this, only the cyclic DMA type gets configured correctly, while the generic DMA type is left non-configured. Without this additional call, the struct imxdma_channel::word_size member is stuck at DMA_SLAVE_BUSWIDTH_UNDEFINED and imxdma_prep_slave_sg() always returns NULL. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Fixes: dea7a9fbb009 ("dmaengine: imx-dma: remove dma_slave_config direction usage") Link: https://lore.kernel.org/r/20210729071821.9857-1-jbe@pengutronix.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02dma: imx-dma: configure the generic DMA type to make it workJuergen Borleis
Commit dea7a9f dmaengine: imx-dma: remove dma_slave_config direction usage changes the method from a "configuration when called" to an "configuration when used". Due to this, only the cyclic DMA type gets configured correctly, while the generic DMA type is left non-configured. Without this additional call, the struct imxdma_channel::word_size member is stuck at DMA_SLAVE_BUSWIDTH_UNDEFINED and imxdma_prep_slave_sg() always returns NULL. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Link: https://lore.kernel.org/r/20210729071821.9857-1-jbe@pengutronix.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02dmaengine: ep93xx: Prepare clock before using itAlexander Sverdlin
Use clk_prepare_enable()/clk_disable_unprepare() in preparation for switch to Common Clock Framework, otherwise the following is visible: WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:1011 clk_core_enable+0x9c/0xbc Enabling unprepared m2p0 ... Hardware name: Cirrus Logic EDB9302 Evaluation Board ... clk_core_enable clk_core_enable_lock ep93xx_dma_alloc_chan_resources dma_chan_get find_candidate __dma_request_channel snd_dmaengine_pcm_request_channel dmaengine_pcm_new snd_soc_pcm_component_new soc_new_pcm snd_soc_bind_card edb93xx_probe ... ep93xx-i2s ep93xx-i2s: Missing dma channel for stream: 0 ep93xx-i2s ep93xx-i2s: ASoC: error at snd_soc_pcm_component_new on ep93xx-i2s: -22 edb93xx-audio edb93xx-audio: ASoC: can't create pcm CS4271 HiFi :-22 edb93xx-audio edb93xx-audio: snd_soc_register_card() failed: -22 edb93xx-audio: probe of edb93xx-audio failed with error -22 Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20210726140001.24820-6-nikita.shubin@maquefel.me Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02dmaengine: dw-axi-dmac: Burst length settingsPandith N
Burst length, DMA HW capability set in dt-binding is now used in driver. Signed-off-by: Pandith N <pandith.n@intel.com> Tested-by: Pan Kris <kris.pan@intel.com> Link: https://lore.kernel.org/r/20210802055454.15192-4-pandith.n@intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02dmaengine: dw-axi-dmac: support parallel memory <--> peripheral transfersPandith N
Added support for multiple DMA_MEM_TO_DEV, DMA_DEV_TO_MEM transfers in parallel. This is required for peripherals using DMA for transmit and receive operations at the same time. APB slot number needs to be programmed in channel hardware handshaking interface Signed-off-by: Pandith N <pandith.n@intel.com> Tested-by: Pan Kris <kris.pan@intel.com> Link: https://lore.kernel.org/r/20210802055454.15192-3-pandith.n@intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02dmaengine: dw-axi-dmac: Remove free slot check algorithm in ↵Pandith N
dw_axi_dma_set_hw_channel Removed free slot check algorithm in dw_axi_dma_set_hw_channel. For 8 DMA channels, use respective handshake slot in DMA_HS_SEL APB register. For every channel, an dedicated slot is provided in hardware handshake register AXIDMA_CTRL_DMA_HS_SEL_n. Peripheral source number is programmed in respective channel slots. Signed-off-by: Pandith N <pandith.n@intel.com> Tested-by: Pan Kris <kris.pan@intel.com> Link: https://lore.kernel.org/r/20210802055454.15192-2-pandith.n@intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02dmaengine: usb-dmac: make usb_dmac_get_current_residue unsignedJordy Zomer
The usb_dmac_get_current_residue function used to take a signed integer as a pos parameter. The only callers of this function passes an unsigned integer to it. Therefore to make it obviously safe, let's just make this an unsgined integer as this is used in pointer arithmetics. Signed-off-by: Jordy Zomer <jordy@pwning.systems> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20210731091939.510816-1-jordy@pwning.systems Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-29dmaengine: idxd: fix abort status checkDave Jiang
Coverity static analysis of linux-next found issue. The check (status == IDXD_COMP_DESC_ABORT) is always false since status was previously masked with 0x7f and IDXD_COMP_DESC_ABORT is 0xff. Fixes: 6b4b87f2c31a ("dmaengine: idxd: fix submission race window") Reported-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162698465160.3560828.18173186265683415384.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmanegine: idxd: add software command statusDave Jiang
Enabling device and wq returns standard errno and that does not provide enough details to indicate what exactly failed. The hardware command status is only 8bits. Expand the command status to 32bits and use the upper 16 bits to define software errors to provide more details on the exact failure. Bit 31 will be used to indicate the error is software set as the driver is using some of the spec defined hardware error as well. Cc: Ramesh Thomas <ramesh.thomas@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162681373579.1968485.5891788397526827892.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: idxd: rotate portal address for better performanceDave Jiang
The device submission portal is on a 4k page and any of those 64bit aligned address on the page can be used for descriptor submission. By rotating the offset through the 4k range and prevent successive writes to the same MMIO address, performance improvement is observed through testing. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162681372446.1968485.10634280461681015569.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: idxd: fix wq slot allocation index checkDave Jiang
The sbitmap wait and allocate routine checks the index that is returned from sbitmap_queue_get(). It should be idxd >= 0 as 0 is also a valid index. This fixes issue where submission path hangs when WQ size is 1. Fixes: 0705107fcc80 ("dmaengine: idxd: move submission to sbitmap_queue") Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162697645067.3478714.506720687816951762.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: idxd: fix uninit var for alt_drvDave Jiang
0-day detected uninitialized alt_drv variable in the bind_store() function. The branch can be taken when device is not idxd device or wq 'struct device'. Init alt_drv to NULL. Fixes: 6e7f3ee97bbe ("dmaengine: idxd: move dsa_drv support to compatible mode") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162689250332.2114335.636367120454420852.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: idxd: Set defaults for GRPCFG traffic classDave Jiang
Set GRPCFG traffic class to value of 1 for best performance on current generation of accelerators. Also add override option to allow experimentation. Sysfs knobs are disabled for DSA/IAX gen1 devices. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162681373005.1968485.3761065664382799202.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: at_xdmac: use platform_driver_registerClément Léger
When using SCMI clocks, the clocks are probed later than subsys initcall level. This driver uses platform_driver_probe which is not compatible with deferred probing and won't be probed again later if probe function fails due to clocks not being available at that time. This patch replaces the use of platform_driver_probe with platform_driver_register which will allow probing the driver later again when clocks will be available. Signed-off-by: Clément Léger <clement.leger@bootlin.com> Link: https://lore.kernel.org/r/20210728094607.50589-1-clement.leger@bootlin.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: of-dma: router_xlate to return -EPROBE_DEFER if controller is not ↵Peter Ujfalusi
yet available If the router_xlate can not find the controller in the available DMA devices then it should return with -EPORBE_DEFER in a same way as the of_dma_request_slave_channel() does. The issue can be reproduced if the event router is registered before the DMA controller itself and a driver would request for a channel before the controller is registered. In of_dma_request_slave_channel(): 1. of_dma_find_controller() would find the dma_router 2. ofdma->of_dma_xlate() would fail and returned NULL 3. -ENODEV is returned as error code with this patch we would return in this case the correct -EPROBE_DEFER and the client can try to request the channel later. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@gmail.com> Link: https://lore.kernel.org/r/20210717190021.21897-1-peter.ujfalusi@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: tegra210-adma: Using pm_runtime_resume_and_get to replace open codingZhang Qilong
use pm_runtime_resume_and_get() to replace pm_runtime_get_sync and pm_runtime_put_noidle. this change is just to simplify the code, there is no actual functional change. Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> Link: https://lore.kernel.org/r/20210607064640.121394-4-zhangqilong3@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28ppc4xx: replace sscanf() by kstrtoul()Salah Triki
Fix the checkpatch.pl warning: "Prefer kstrto<type> to single variable sscanf". Signed-off-by: Salah Triki <salah.triki@gmail.com> Link: https://lore.kernel.org/r/20210710165432.GA690401@pc Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: stm32-dma: add alternate REQ/ACK protocol managementAmelie Delaunay
STM32 USART/UART is not managing correctly the default DMA REQ/ACK protocol leading to possibly lock the DMA stream. Default protocol consists in maintaining ACK signal up to the removal of REQuest and the transfer completion. In case of alternative REQ/ACK protocol, ACK de-assertion does not wait the removal of the REQuest, but only the transfer completion. This patch retrieves the need of the alternative protocol through the device tree, and sets the protocol accordingly. It also unwrap STM32_DMA_DIRECT_MODE_GET macro definition for consistency with new STM32_DMA_ALT_ACK_MODE_GET macro definition. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20210624093959.142265-3-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: altera-msgdma: make response port optionalOlivier Dautricourt
The response slave port can be disabled in some configuration [1] and csr + MSGDMA_CSR_RESP_FILL_LEVEL will be 0 even if transfer has suceeded. We have to only rely on the interrupts in that scenario. This was tested on cyclone V with the controller resp port disabled. [1] https://www.intel.com/content/www/us/en/programmable/documentation/sfo1400787952932.html 30.3.1.2 30.3.1.3 30.5.5 Fixes: https://forum.rocketboards.org/t/ip-msgdma-linux-driver/1919 Signed-off-by: Olivier Dautricourt <olivier.dautricourt@orolia.com> Reviewed-by: Stefan Roese <sr@denx.de> Link: https://lore.kernel.org/r/8220756f2191ca08cb21702252d1f2d4f753a7f5.1623898678.git.olivier.dautricourt@orolia.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: hisi_dma: Remove some useless codeChristophe JAILLET
When using 'pcim_enable_device()', 'pci_alloc_irq_vectors()' is auto-magically a managed function. It is useless (but harmless) to record an action to explicitly call 'pci_free_irq_vectors()'. So keep things simple, comment why and how these resources are freed, axe some useless code and save some memory. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/4f8932e2d0d8d092bf60272511100030e013bc72.1623875508.git.christophe.jaillet@wanadoo.fr Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: zynqmp_dma: Use list_move_tail instead of list_del/list_add_tailBaokun Li
Using list_move_tail() instead of list_del() + list_add_tail(). Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Baokun Li <libaokun1@huawei.com> Link: https://lore.kernel.org/r/20210609071349.1336853-1-libaokun1@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: fsl-dpaa2-qdma: Use list_move_tail instead of list_del/list_add_tailBaokun Li
Using list_move_tail() instead of list_del() + list_add_tail(). Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Baokun Li <libaokun1@huawei.com> Link: https://lore.kernel.org/r/20210609072802.1368785-1-libaokun1@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: xilinx_dma: Use list_move_tail instead of list_del/list_add_tailBaokun Li
Using list_move_tail() instead of list_del() + list_add_tail(). Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Baokun Li <libaokun1@huawei.com> Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/20210608030905.2818831-1-libaokun1@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: stm32-dmamux: Fix PM usage counter unbalance in stm32 dmamux opsZhang Qilong
pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. We fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Fixes: 4f3ceca254e0f ("dmaengine: stm32-dmamux: Add PM Runtime support") Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> Link: https://lore.kernel.org/r/20210607064640.121394-3-zhangqilong3@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28dmaengine: stm32-dma: Fix PM usage counter imbalance in stm32 dma opsZhang Qilong
pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. We fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Fixes: 48bc73ba14bcd ("dmaengine: stm32-dma: Add PM Runtime support") Fixes: 05f8740a0e6fc ("dmaengine: stm32-dma: add suspend/resume power management support") Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> Link: https://lore.kernel.org/r/20210607064640.121394-2-zhangqilong3@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-27Merge tag 'bus_remove_return_void-5.15' into nextVinod Koul
This helps to remove conflict on idxd driver Conflicts: drivers/dma/idxd/sysfs.c drivers/dma/idxd/bus.c Greg says: Bus: Make remove callback return void tag Tag for other trees/branches to pull from in order to have a stable place to build off of if they want to add new busses for 5.15. Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-27dmaengine: uniphier-xdmac: Use readl_poll_timeout_atomic() in atomic stateKunihiko Hayashi
The function uniphier_xdmac_chan_stop() is only called in atomic state. Should use readl_poll_timeout_atomic() there instead of readl_poll_timeout(). Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Fixes: 667b9251440b ("dmaengine: uniphier-xdmac: Add UniPhier external DMA controller driver") Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Link: https://lore.kernel.org/r/1627364852-28432-1-git-send-email-hayashi.kunihiko@socionext.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
generated by cgit (git 2.34.1) at 2025-09-11 20:06:31 +0000