leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
dc3029056b
linux/drivers/spi
History
David Jander dc3029056b
spi: opportunistically skip ctlr->cur_msg_completion 
There are only a few drivers that do not call
spi_finalize_current_message() in the context of transfer_one_message(),
and even for those cases the completion ctlr->cur_msg_completion is not
needed always. The calls to complete() and wait_for_completion() each
take a spin-lock, which is costly. This patch makes it possible to avoid
those calls in the big majority of cases, by introducing two flags that
with the help of ordering via barriers can avoid using the completion
safely. In case of a race with the context calling
spi_finalize_current_message(), the scheme errs on the safe side and takes
the completion.
The impact of this patch is worth the effort: On a i.MX8MM SoC, the time
the SPI bus is idle between two consecutive calls to spi_sync(), is
reduced from 19.6us to 16.8us... roughly 15%.

Signed-off-by: David Jander <david@protonic.nl>
Link: https://lore.kernel.org/r/20220621061234.3626638-12-david@protonic.nl
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-06-27 13:27:26 +01:00
..
atmel-quadspi.c spi: atmel-quadspi: align condition to parenthesis 2022-06-09 12:20:05 +01:00
internals.h
Kconfig spi: add support for microchip fpga spi controllers 2022-06-07 13:57:07 +01:00
Makefile spi: add support for microchip fpga spi controllers 2022-06-07 13:57:07 +01:00
spi-altera-core.c spi: altera: separate core code from platform code 2021-04-20 17:26:40 +01:00
spi-altera-dfl.c spi: spi-altera-dfl: Fix an error handling path 2022-06-06 12:39:16 +01:00
spi-altera-platform.c spi: altera: Change to dynamic allocation of spi id 2021-10-20 01:53:15 +01:00
spi-amd.c spi: amd: Fix building without ACPI enabled 2022-02-16 16:34:25 +00:00
spi-ar934x.c spi: ar934x: fix transfer size 2022-01-04 14:59:40 +00:00
spi-armada-3700.c spi: change clk_disable_unprepare to clk_unprepare 2022-01-26 12:58:14 +00:00
spi-aspeed-smc.c mtd: spi-nor: aspeed: set the decoding size to at least 2MB for AST2600 2022-05-16 12:59:21 +01:00
spi-at91-usart.c spi: at91-usart: replacing legacy gpio interface for gpiod 2021-10-20 00:23:21 +01:00
spi-ath79.c spi: ath79: add mem_ops for fast-read 2022-02-08 13:40:18 +00:00
spi-atmel.c spi: atmel: Fix typo 2022-01-07 13:36:37 +00:00
spi-au1550.c spi: spi-au1550: replace ternary operator with min() 2022-05-16 17:57:01 +01:00
spi-axi-spi-engine.c spi: spi-axi-spi-engine: remove usage of delay_usecs 2021-03-12 14:30:42 +00:00
spi-bcm63xx-hsspi.c spi: bcm63xx-hsspi: fix pm_runtime 2021-03-10 12:25:12 +00:00
spi-bcm63xx.c spi: bcm63xx-spi: don't check 'delay_usecs' field 2021-03-12 14:30:43 +00:00
spi-bcm2835.c spi: spi-bcm2835: Fix deadlock 2021-07-20 13:34:05 +01:00
spi-bcm2835aux.c spi: bcm2835aux: Convert to use GPIO descriptors 2022-02-01 16:08:47 +00:00
spi-bcm-qspi.c spi: bcm-qspi: fix MSPI only access with bcm_qspi_exec_mem_op() 2022-04-06 15:50:11 +01:00
spi-bcm-qspi.h
spi-bitbang-txrx.h spi: gpio: Implement LSB First bitbang support 2022-02-22 11:56:41 +00:00
spi-bitbang.c spi: Cleanup on failure of initial setup 2021-06-01 14:03:12 +01:00
spi-brcmstb-qspi.c
spi-butterfly.c spi: butterfly: Switch to use module_parport_driver() 2021-03-10 12:46:05 +00:00
spi-cadence-quadspi.c spi: cadence-quadspi: Remove spi_master_put() in probe failure path 2022-06-06 12:39:18 +01:00
spi-cadence-xspi.c spi: cadence: fix platform_get_irq.cocci warning 2022-03-07 13:16:07 +00:00
spi-cadence.c spi: spi-cadence: Update ISR status variable type to irqreturn_t 2022-05-13 13:43:05 +01:00
spi-cavium-octeon.c
spi-cavium-thunderx.c
spi-cavium.c
spi-cavium.h
spi-clps711x.c spi: clps711x: Use syscon_regmap_lookup_by_phandle 2022-04-25 14:01:09 +01:00
spi-coldfire-qspi.c spi: coldfire-qspi: Use clk_disable_unprepare in the remove function 2021-08-19 18:20:10 +01:00
spi-davinci.c spi: davinci: invoke chipselect callback 2021-08-24 20:53:24 +01:00
spi-dln2.c spi: dln2: Propagate firmware node 2021-12-23 13:38:38 +00:00
spi-dw-bt1.c spi: dw: Put the driver entities naming in order 2021-11-16 14:30:05 +00:00
spi-dw-core.c spi: dw: Propagate firmware node 2021-12-23 13:38:39 +00:00
spi-dw-dma.c spi: dw: Put the driver entities naming in order 2021-11-16 14:30:05 +00:00
spi-dw-mmio.c spi: dw: Replace DWC_HSSI capability with IP-core version checker 2021-11-16 14:30:09 +00:00
spi-dw-pci.c spi: dw: Put the driver entities naming in order 2021-11-16 14:30:05 +00:00
spi-dw.h spi: dw: Define the capabilities in a continuous bit-flags set 2021-11-16 14:30:10 +00:00
spi-ep93xx.c spi: spi-ep93xx: Prepare clock before using it 2021-08-03 18:27:24 +01:00
spi-falcon.c spi: spi-falcon: remove check for 'delay_usecs' 2021-03-12 14:30:48 +00:00
spi-fsi.c spi: fsi: Increase timeout and ensure status is checked 2022-06-23 15:48:21 +01:00
spi-fsl-cpm.c
spi-fsl-cpm.h
spi-fsl-dspi.c spi: spi-fsl-dspi: Fix issue with uninitialized dma_slave_config 2021-08-10 13:22:19 +01:00
spi-fsl-espi.c spi: fsl-espi: remove usage of 'delay_usecs' field 2021-03-12 14:30:49 +00:00
spi-fsl-lib.c
spi-fsl-lib.h
spi-fsl-lpspi.c dmaengine: imx: Move header to include/dma/ 2022-04-19 12:06:18 +01:00
spi-fsl-qspi.c spi: spi-fsl-qspi: check return value after calling platform_get_resource_byname() 2022-05-09 12:48:47 +01:00
spi-fsl-spi.c spi: Cleanup on failure of initial setup 2021-06-01 14:03:12 +01:00
spi-fsl-spi.h
spi-geni-qcom.c spi: qcom: geni: Simplify DMA setting 2022-01-28 16:00:24 +00:00
spi-gpio.c spi: gpio: Implement LSB First bitbang support 2022-02-22 11:56:41 +00:00
spi-hisi-kunpeng.c spi: hisi-kunpeng: Fix the debugfs directory name incorrect 2021-11-17 13:04:54 +00:00
spi-hisi-sfc-v3xx.c spi: hisi-sfc-v3xx: drop unnecessary ACPI_PTR and related ifendif protection 2021-04-12 17:07:38 +01:00
spi-img-spfi.c spi: img-spfi: Fix pm_runtime_get_sync() error checking 2022-04-22 12:37:36 +01:00
spi-imx.c sound updates for 5.19-rc1 2022-05-25 16:55:16 -07:00
spi-ingenic.c spi: ingenic: Add support for new Ingenic SoCs. 2022-04-25 14:00:51 +01:00
spi-intel-pci.c spi: intel: Add support for Raptor Lake-S SPI serial flash 2022-04-13 13:47:37 +01:00
spi-intel-platform.c mtd: spi-nor: intel-spi: Convert to SPI MEM 2022-02-14 12:53:09 +00:00
spi-intel.c spi: intel: Use correct order for the parameters of devm_kcalloc() 2022-06-06 12:41:28 +01:00
spi-intel.h mtd: spi-nor: intel-spi: Convert to SPI MEM 2022-02-14 12:53:09 +00:00
spi-iproc-qspi.c
spi-jcore.c spi: jcore: Fix trailing statements should be on next line 2021-03-24 19:51:09 +00:00
spi-lantiq-ssc.c spi: Use of_device_get_match_data() 2022-02-21 13:25:19 +00:00
spi-lm70llp.c spi: lm70llp: add parenthesis for sizeof 2021-05-20 18:00:34 +01:00
spi-loopback-test.c spi: spi-loopback-test: Fix 'tx_buf' might be 'rx_buf' 2021-05-10 13:07:53 +01:00
spi-lp8841-rtc.c
spi-mem.c spi: stm32-qspi: flags management fixes 2022-05-11 19:48:07 +01:00
spi-meson-spicc.c spi: meson-spicc: add IRQ check in meson_spicc_probe 2022-01-26 13:32:36 +00:00
spi-meson-spifc.c spi: spi-meson-spifc: Add missing pm_runtime_disable() in meson_spifc_probe 2022-01-07 13:36:38 +00:00
spi-microchip-core.c spi: microchip-core: fix passing zero to PTR_ERR warning 2022-06-16 09:31:21 +01:00
spi-mpc52xx-psc.c spi: Prepare cleanup of powerpc's asm/prom.h 2022-04-05 10:21:55 +01:00
spi-mpc52xx.c spi: Prepare cleanup of powerpc's asm/prom.h 2022-04-05 10:21:55 +01:00
spi-mpc512x-psc.c spi: mpc512x-psc: Fix compile errors 2022-02-02 16:09:29 +00:00
spi-mt65xx.c spi: mt65xx: Fix definitions indentation 2022-04-19 16:32:14 +01:00
spi-mt7621.c spi: mt7621: Don't leak SPI master in probe error path 2020-12-07 14:18:59 +00:00
spi-mtk-nor.c spi: spi-mtk-nor: initialize spi controller after resume 2022-04-12 17:18:51 +01:00
spi-mtk-snfi.c spi: mtk-snfi: preserve dma_mapping_error() error codes 2022-05-03 14:00:38 +01:00
spi-mux.c spi-mux: Fix false-positive lockdep splats 2021-10-14 13:32:19 +01:00
spi-mxic.c spi: mxic: Fix an error handling path in mxic_spi_probe() 2022-04-04 08:45:14 +01:00
spi-mxs.c spi: mxs: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:00:59 +01:00
spi-npcm-fiu.c spi: npcm-fiu: Fix typo ("npxm") 2022-03-07 13:16:58 +00:00
spi-npcm-pspi.c spi: npcm-pspi: Use SPI_MODE_X_MASK 2021-05-11 15:42:48 +01:00
spi-nxp-fspi.c spi: spi-nxp-fspi: don't depend on a specific node name erratum workaround 2021-10-02 01:31:49 +01:00
spi-oc-tiny.c spi: oc-tiny: Use SPI_MODE_X_MASK 2021-05-11 15:42:49 +01:00
spi-omap2-mcspi.c spi: omap2-mcspi: add support for interword delay 2022-05-04 16:02:36 +01:00
spi-omap-100k.c spi: fix some invalid char occurrences 2021-05-20 17:58:33 +01:00
spi-omap-uwire.c ARM: omap1: move perseus spi pinconf to board file 2022-04-21 15:01:08 +02:00
spi-orion.c spi: orion: Add of_node_put() before goto 2021-10-15 16:10:59 +01:00
spi-pic32-sqi.c
spi-pic32.c spi: pic32: Convert to use GPIO descriptors 2022-01-31 15:17:30 +00:00
spi-pl022.c spi: spl022: fix Microwire full duplex mode 2021-10-26 11:53:57 +01:00
spi-ppc4xx.c spi: ppc4xx: add parenthesis for sizeof 2021-05-20 18:00:40 +01:00
spi-pxa2xx-dma.c spi: pxa2xx: Fix style of and typos in the comments and messages 2021-05-18 14:05:35 +01:00
spi-pxa2xx-pci.c spi: pxa2xx-pci: Constify struct pxa_spi_info variables 2022-02-28 12:10:27 +00:00
spi-pxa2xx.c spi: pxa2xx: Add support for Intel Raptor Lake PCH-S 2022-02-16 16:34:26 +00:00
spi-pxa2xx.h spi: pxa2xx: Get rid of unused ->cs_control() 2021-11-29 12:19:59 +00:00
spi-qcom-qspi.c spi: spi-qcom-qspi: Convert to use resource-managed OPP API 2021-03-16 10:14:11 +05:30
spi-qup.c spi: qup: replace spin_lock_irqsave by spin_lock in hard IRQ 2022-03-07 13:16:08 +00:00
spi-rb4xx.c spi: rb4xx: Don't leak SPI master in probe error path 2020-12-07 14:18:55 +00:00
spi-realtek-rtl.c spi: realtek-rtl: Add support for Realtek RTL838x/RTL839x SPI controllers 2021-02-04 18:45:57 +00:00
spi-rockchip-sfc.c spi: rockchip-sfc: fix platform_get_irq.cocci warning 2022-03-10 12:17:56 +00:00
spi-rockchip.c spi: rockchip: fix missing error on unsupported SPI_CS_HIGH 2022-04-25 14:01:01 +01:00
spi-rpc-if.c spi: rpc-if: Fix RPM imbalance in probe error path 2022-04-04 08:38:59 +01:00
spi-rspi.c spi: spi-rspi: Remove setting {src,dst}_{addr,addr_width} based on DMA direction 2022-04-12 17:17:22 +01:00
spi-s3c24xx-regs.h
spi-s3c24xx.c spi: s3c24xx: Convert to GPIO descriptors 2022-01-24 13:37:34 +00:00
spi-s3c64xx.c spi: s3c64xx: set pointers to null using NULL rather than 0 2022-06-13 15:55:46 +01:00
spi-sc18is602.c spi: sc18is602: implement .max_{transfer,message}_size() for the controller 2021-05-21 13:13:33 +01:00
spi-sh-hspi.c
spi-sh-msiof.c spi: sh-msiof: drop unneeded MODULE_ALIAS 2021-09-17 13:17:50 +01:00
spi-sh-sci.c
spi-sh.c spi: spi-sh: replace 'delay_usecs' with 'delay.value' in pr_debug 2021-03-12 14:30:45 +00:00
spi-sifive.c spi: sifive: add PM callbacks to support suspend/resume 2022-06-10 13:32:24 +01:00
spi-slave-mt27xx.c spi: mediatek: add mt8195 spi slave support 2021-03-23 17:19:45 +00:00
spi-slave-system-control.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-slave-time.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-sprd-adi.c spi: sprd: Add ADI r3 support 2021-08-26 12:09:38 +01:00
spi-sprd.c spi: spi-sprd: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:00:57 +01:00
spi-st-ssc4.c spi: st-ssc4: Covert to use GPIO descriptors 2022-02-01 16:08:45 +00:00
spi-stm32-qspi.c spi: stm32-qspi: Remove stm32_qspi_wait_poll_status() unused parameter 2022-06-06 12:39:14 +01:00
spi-stm32.c spi: stm32: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:01:08 +01:00
spi-sun4i.c spi: sun4i: fix typos in comments 2022-03-15 12:03:58 +00:00
spi-sun6i.c spi: spi-sun6i: Fix chipselect/clock bug 2021-06-23 11:48:36 +01:00
spi-sunplus-sp7021.c spi: remove spin_lock_irq and variable in the irq procress 2022-04-19 13:13:42 +01:00
spi-synquacer.c spi: spi-synquacer: fix set_cs handling 2021-02-03 16:23:07 +00:00
spi-tegra20-sflash.c spi: spi-tegra20-sflash: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:01:03 +01:00
spi-tegra20-slink.c spi: spi-tegra20-slink: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-25 14:01:06 +01:00
spi-tegra114.c spi: spi-tegra114: using pm_runtime_resume_and_get instead of pm_runtime_get_sync 2022-04-19 13:13:44 +01:00
spi-tegra210-quad.c spi: tegra210-quad: Multi-cs support 2022-06-13 13:28:29 +01:00
spi-test.h
spi-ti-qspi.c spi: spi-ti-qspi: Support per-transfer and per-slave speed_hz settings 2022-06-06 12:41:36 +01:00
spi-tle62x0.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
spi-topcliff-pch.c spi: topcliff-pch: Use core message validation 2022-06-20 12:43:36 +01:00
spi-uniphier.c spi: uniphier: fix reference count leak in uniphier_spi_probe() 2022-01-26 15:52:05 +00:00
spi-xcomm.c
spi-xilinx.c
spi-xlp.c spi: xlp: Remove Netlogic XLP variants 2021-11-15 13:27:17 +00:00
spi-xtensa-xtfpga.c
spi-zynq-qspi.c spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op() 2022-02-08 13:37:50 +00:00
spi-zynqmp-gqspi.c spi: spi-zynqmp-gqspi: Add two chip select support 2022-06-06 12:41:27 +01:00
spi.c spi: opportunistically skip ctlr->cur_msg_completion 2022-06-27 13:27:26 +01:00
spidev.c spi: spidev: add SPI_RX_CPHA_FLIP 2022-04-19 13:13:48 +01:00