Serge Semin ad4fe1264b spi: dw-dma: Add one-by-one SG list entries transfer ... In case if at least one of the requested DMA engine channels doesn't support the hardware accelerated SG list entries traverse, the DMA driver will most likely work that around by performing the IRQ-based SG list entries resubmission. That might and will cause a problem if the DMA Tx channel is recharged and re-executed before the Rx DMA channel. Due to non-deterministic IRQ-handler execution latency the DMA Tx channel will start pushing data to the SPI bus before the Rx DMA channel is even reinitialized with the next inbound SG list entry. By doing so the DMA Tx channel will implicitly start filling the DW APB SSI Rx FIFO up, which while the DMA Rx channel being recharged and re-executed will eventually be overflown. In order to solve the problem we have to feed the DMA engine with SG list entries one-by-one. It shall keep the DW APB SSI Tx and Rx FIFOs synchronized and prevent the Rx FIFO overflow. Since in general the SPI tx_sg and rx_sg lists may have different number of entries of different lengths (though total length should match) we virtually split the SG-lists to the set of DMA transfers, which length is a minimum of the ordered SG-entries lengths. The solution described above is only executed if a full-duplex SPI transfer is requested and the DMA engine hasn't provided channels with hardware accelerated SG list traverse capability to handle both SG lists at once. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20200920112322.24585-12-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>		2020-09-29 16:37:15 +01:00
..
atmel-quadspi.c	spi: atmel-quadspi: Use optimezed memcpy_fromio()/memcpy_toio()	2020-07-17 00:55:24 +01:00
internals.h
Kconfig	spi: qup: Allow for compile-testing on !ARM	2020-09-07 19:04:23 +01:00
Makefile	Merge series "mtd: spi-nor: Move cadence-qaudspi to spi-mem framework" from Vignesh Raghavendra <vigneshr@ti.com>:	2020-06-19 14:26:55 +01:00
spi-altera.c	spi: altera: fix module autoload	2020-06-24 16:37:47 +01:00
spi-amd.c	spi: spi-amd: Do not define 'struct acpi_device_id' when !CONFIG_ACPI	2020-07-17 16:38:56 +01:00
spi-ar934x.c	spi: add driver for ar934x spi controller	2020-02-11 11:37:30 +00:00
spi-armada-3700.c	spi: a3700: Remove a useless memset	2020-08-18 17:52:37 +01:00
spi-at91-usart.c	spi: spi-at91-usart: Remove unused OF table 'struct of_device_id'	2020-07-17 16:38:54 +01:00
spi-ath79.c
spi-atmel.c	spi: atmel: Simplify with dev_err_probe()	2020-09-08 18:19:24 +01:00
spi-au1550.c
spi-axi-spi-engine.c	spi: spi-axi-spi-engine: Access register after clock initialization	2020-04-09 18:46:53 +01:00
spi-bcm63xx-hsspi.c	spi: bcm63xx-hsspi: add reset support	2020-06-17 14:29:58 +01:00
spi-bcm63xx.c	spi: bcm63xx-spi: add reset support	2020-06-17 14:29:58 +01:00
spi-bcm2835.c	spi: bcm2835: Make polling_limit_us static	2020-09-14 15:50:15 +01:00
spi-bcm2835aux.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
spi-bcm-qspi.c	spi: bcm-qspi: Clean up 7425, 7429, and 7435 settings	2020-09-14 15:50:08 +01:00
spi-bcm-qspi.h
spi-bitbang-txrx.h
spi-bitbang.c	spi: spi-bitbang: Demote obvious misuse of kerneldoc to standard comment blocks	2020-07-17 16:38:45 +01:00
spi-brcmstb-qspi.c
spi-butterfly.c
spi-cadence-quadspi.c	spi: cadence-quadspi: Simplify with dev_err_probe()	2020-09-08 18:19:26 +01:00
spi-cadence.c	spi: spi-cadence: add support for chip select high	2020-07-22 01:55:51 +01:00
spi-cavium-octeon.c
spi-cavium-thunderx.c	spi: spi-cavium-thunderx: flag controller as half duplex	2020-06-16 00:38:39 +01:00
spi-cavium.c	spi: use new spi_transfer_delay_exec helper where straightforward	2019-10-15 11:51:57 +01:00
spi-cavium.h
spi-clps711x.c
spi-coldfire-qspi.c	spi: coldfire-qspi: Use clk_prepare_enable and clk_disable_unprepare	2020-07-17 00:55:26 +01:00
spi-davinci.c	Remove uninitialized_var() macro for v5.9-rc1	2020-08-04 13:49:43 -07:00
spi-dln2.c
spi-dw-core.c	spi: dw: Add support for RX sample delay register	2020-09-08 16:15:36 +01:00
spi-dw-dma.c	spi: dw-dma: Add one-by-one SG list entries transfer	2020-09-29 16:37:15 +01:00
spi-dw-mmio.c	spi: dw: Add Microchip Sparx5 support	2020-09-08 16:15:37 +01:00
spi-dw-pci.c	spi: dw-pci: free previously allocated IRQs if desc->setup() fails	2020-09-17 19:56:04 +01:00
spi-dw.h	spi: dw-dma: Add one-by-one SG list entries transfer	2020-09-29 16:37:15 +01:00
spi-efm32.c	spi: efm32: Convert to use GPIO descriptors	2020-03-27 15:52:23 +00:00
spi-ep93xx.c	spi: spi-ep93xx: Fix API slippage	2020-07-17 16:38:47 +01:00
spi-falcon.c	spi: spi-falcon: extend warning to delay as well	2019-10-15 11:46:57 +01:00
spi-fsi.c	spi: fsi: Check mux status before transfers	2020-09-17 19:31:43 +01:00
spi-fsl-cpm.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
spi-fsl-cpm.h
spi-fsl-dspi.c	spi: spi-fsl-dspi: use XSPI mode instead of DMA for DPAA2 SoCs	2020-09-14 15:50:14 +01:00
spi-fsl-espi.c	spi: spi-fsl-espi: Remove use of %p	2020-08-25 22:46:50 +01:00
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c	spi: lpspi: Remove CONFIG_PM_SLEEP ifdefery	2020-08-18 17:52:36 +01:00
spi-fsl-qspi.c	spi: Fix SPI NOR and SPI NAND acronyms	2020-07-17 00:55:25 +01:00
spi-fsl-spi.c	spi: fsl: add missing __iomem annotation	2020-07-01 23:21:26 +01:00
spi-fsl-spi.h
spi-geni-qcom.c	spi: spi-geni-qcom: Don't wait to start 1st transfer if transmitting	2020-09-14 15:50:16 +01:00
spi-gpio.c	Merge branch 'for-5.4' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.5	2019-10-08 19:12:28 +01:00
spi-hisi-sfc-v3xx.c	spi: hisi-sfc-v3xx: fix spelling mistake "occured" -> "occurred"	2020-09-28 20:33:56 +01:00
spi-img-spfi.c	spi: img-spfi: Convert to use GPIO descriptors	2020-07-01 23:21:29 +01:00
spi-imx.c	spi: spi-imx: spi_imx_transfer(): add support for effective_speed_hz	2020-09-23 19:59:32 +01:00
spi-iproc-qspi.c
spi-jcore.c	remove ioremap_nocache and devm_ioremap_nocache	2020-01-06 09:45:59 +01:00
spi-lantiq-ssc.c	spi: lantiq: remove redundant irqsave and irqrestore in hardIRQ	2020-09-17 19:56:02 +01:00
spi-lm70llp.c
spi-loopback-test.c	spi: spi-loopback-test: Fix formatting issues in function header blocks	2020-07-17 16:38:44 +01:00
spi-lp8841-rtc.c
spi-mem.c	spi: spi-mem: allow specifying a command's extension	2020-07-14 17:29:38 +01:00
spi-meson-spicc.c	spi: spi-meson-spicc: Remove set but never used variable 'data' from meson_spicc_reset_fifo()	2020-07-17 16:38:48 +01:00
spi-meson-spifc.c	spi: spi-meson-spifc: Fix misdocumenting of 'dev' in 'struct meson_spifc'	2020-07-17 16:38:48 +01:00
spi-mpc52xx-psc.c	spi: use new spi_transfer_delay_exec helper where straightforward	2019-10-15 11:51:57 +01:00
spi-mpc52xx.c
spi-mpc512x-psc.c	spi: use new spi_transfer_delay_exec helper where straightforward	2019-10-15 11:51:57 +01:00
spi-mt65xx.c	spi: mediatek: add spi support for mt8192 IC	2020-07-22 01:56:00 +01:00
spi-mt7621.c
spi-mtk-nor.c	spi: spi-mtk-nor: fix timeout calculation overflow	2020-09-25 21:40:20 +01:00
spi-mux.c	spi: spi-mux: Simplify with dev_err_probe()	2020-09-08 18:19:27 +01:00
spi-mxic.c	spi: spi-mem: allow specifying a command's extension	2020-07-14 17:29:38 +01:00
spi-mxs.c	spi: mxs: Drop GPIO includes	2020-03-17 13:20:16 +00:00
spi-npcm-fiu.c	spi: npcm-fiu: simplify the return expression of npcm_fiu_probe()	2020-09-22 01:04:19 +01:00
spi-npcm-pspi.c	spi: npcm-pspi: Convert to use GPIO descriptors	2020-07-01 23:21:28 +01:00
spi-nxp-fspi.c	spi: spi-nxp-fspi: Add ACPI support	2020-09-17 19:56:03 +01:00
spi-oc-tiny.c	SPI SUBSYSTEM: Replace HTTP links with HTTPS ones	2020-07-09 22:41:11 +01:00
spi-omap2-mcspi.c	spi: omap2-mcspi: Improve performance waiting for CHSTAT	2020-09-22 01:04:20 +01:00
spi-omap-100k.c	spi: omap-100k: Drop include	2020-07-14 17:38:46 +01:00
spi-omap-uwire.c	spi: omap-uwire: Use clk_prepare_enable and clk_disable_unprepare	2020-07-15 15:58:33 +01:00
spi-orion.c	spi: Fix SPI NOR and SPI NAND acronyms	2020-07-17 00:55:25 +01:00
spi-pic32-sqi.c
spi-pic32.c	spi: pic32: Retire dma_request_slave_channel_compat()	2019-11-22 19:53:41 +00:00
spi-pl022.c	spi: spi-pl022: Provide missing struct attribute/function param docs	2020-07-17 16:38:50 +01:00
spi-ppc4xx.c	spi: ppc4xx: Convert to use GPIO descriptors	2020-07-22 01:55:52 +01:00
spi-pxa2xx-dma.c
spi-pxa2xx-pci.c
spi-pxa2xx.c	spi: spi-pxa2xx: Do not define 'struct acpi_device_id' when !CONFIG_ACPI	2020-07-17 16:38:55 +01:00
spi-pxa2xx.h
spi-qcom-qspi.c	spi: spi-qcom-qspi: replace spin_lock_irqsave by spin_lock in hard IRQ	2020-09-14 15:50:10 +01:00
spi-qup.c	spi: qup: remove redundant assignment to variable ret	2020-09-14 15:50:04 +01:00
spi-rb4xx.c	spi: rb4xx: update driver to be device tree aware	2020-05-22 14:13:17 +01:00
spi-rockchip.c	spi: rockchip: Fix error in SPI slave pio read	2020-07-28 17:29:31 +01:00
spi-rpc-if.c	spi: add Renesas RPC-IF driver	2020-06-16 00:38:38 +01:00
spi-rspi.c	spi: rspi: Fill in controller speed limits	2020-08-20 22:38:17 +01:00
spi-s3c24xx-fiq.h
spi-s3c24xx-fiq.S
spi-s3c24xx.c	spi: s3c24xx: correct kerneldoc comment	2020-08-18 17:52:39 +01:00
spi-s3c64xx.c	spi: spi-s3c64xx: Add missing entries for structs 's3c64xx_spi_dma_data' and 's3c64xx_spi_dma_data'	2020-07-17 16:38:49 +01:00
spi-sc18is602.c	spi: sc18is602: Fix a typo in MODULE_DESCRIPTION	2020-04-14 12:39:37 +01:00
spi-sh-hspi.c	spi: use new spi_transfer_delay_exec helper where straightforward	2019-10-15 11:51:57 +01:00
spi-sh-msiof.c	spi: spi-sh-msiof: Fix checkpatch error Complex macros should use ()	2020-04-14 18:36:34 +01:00
spi-sh-sci.c
spi-sh.c
spi-sifive.c	spi: sifive: disable clk when probe fails and remove	2019-11-04 13:26:11 +00:00
spi-sirf.c	spi: sirf: Use dma_request_chan() instead dma_request_slave_channel()	2019-12-16 11:57:36 +00:00
spi-slave-mt27xx.c	spi: mediatek: Use devm_platform_ioremap_resource() in mtk_spi_slave_probe()	2019-10-01 12:34:58 +01:00
spi-slave-system-control.c
spi-slave-time.c
spi-sprd-adi.c	spi: sprd: Simplify with dev_err_probe()	2020-09-14 15:50:17 +01:00
spi-sprd.c	spi: sprd: Simplify with dev_err_probe()	2020-09-14 15:50:17 +01:00
spi-st-ssc4.c	spi: st-ssc4: add missed pm_runtime_disable	2019-11-18 12:59:11 +00:00
spi-stm32-qspi.c	spi: stm32-qspi: Fix error path in case of -EPROBE_DEFER	2020-06-17 13:26:41 +01:00
spi-stm32.c	spi: stm32: Simplify with dev_err_probe()	2020-09-08 18:19:29 +01:00
spi-sun4i.c	spi: sun4i: update max transfer size reported	2020-07-27 14:55:21 +01:00
spi-sun6i.c	spi: spi-sun6i: sun6i_spi_transfer_one(): enable RF_RDY interrupt only if needed	2020-07-07 10:41:41 +01:00
spi-synquacer.c	spi: synquacer: Simplify with dev_err_probe()	2020-09-08 18:19:29 +01:00
spi-tegra20-sflash.c	spi: tegra20-sflash: Fix runtime PM imbalance on error	2020-05-28 14:01:16 +01:00
spi-tegra20-slink.c	spi: tegra20: Simplify with dev_err_probe()	2020-09-08 18:19:31 +01:00
spi-tegra114.c	spi: tegra114: Simplify with dev_err_probe()	2020-09-08 18:19:30 +01:00
spi-test.h
spi-ti-qspi.c	SPI SUBSYSTEM: Replace HTTP links with HTTPS ones	2020-07-09 22:41:11 +01:00
spi-tle62x0.c
spi-topcliff-pch.c	spi/topcliff-pch: drop double zeroing	2020-09-21 17:56:38 +01:00
spi-txx9.c	spi: txx9: Convert to use GPIO descriptors	2019-10-30 14:14:32 +00:00
spi-uniphier.c	spi: uniphier: Use devm_platform_get_and_ioremap_resource() to simplify code	2020-05-11 18:17:52 +01:00
spi-xcomm.c	spi: use new spi_transfer_delay_exec helper where straightforward	2019-10-15 11:51:57 +01:00
spi-xilinx.c	spi: xilinx: Fix info message during probe	2020-09-17 19:56:01 +01:00
spi-xlp.c
spi-xtensa-xtfpga.c	spi: xtensa-xtfpga: Use devm_platform_ioremap_resource() in xtfpga_spi_probe()	2019-10-01 12:35:18 +01:00
spi-zynq-qspi.c	spi: spi-zynq-qspi: Add description for 2 missing attributes/parameters	2020-07-17 16:38:51 +01:00
spi-zynqmp-gqspi.c	spi: spi-zynqmp-gqspi: Fix incorrect indentation	2020-09-24 12:59:29 +01:00
spi.c	spi: Fixes for v5.9	2020-08-18 14:27:12 -07:00
spidev.c	spi: spidev: Remove redundant initialization of variable status	2020-09-09 16:27:46 +01:00