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linux-hardened/drivers/mmc/host
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Adrian Hunter 04a5ae6fdd mmc: sdhci: 64-bit DMA actually has 4-byte alignment 
The version 3.00 SDHCI spec. was a bit unclear about the
required data alignment for 64-bit DMA, whereas the version
4.10 spec. uses different language and indicates that only
4-byte alignment is required rather than the 8-byte alignment
currently implemented.  That make no difference to SD and EMMC
which invariably transfer data in sector-aligned blocks.
However with SDIO, it results in using more DMA descriptors
than necessary.  Theoretically that slows DMA slightly although
DMA is not the limiting factor for throughput, so there is no
discernable impact on performance.  Nevertheless, the driver
should follw the spec unless there is good reason not to, so
this patch corrects the alignment criterion.

There is a more complicated criterion for the DMA descriptor
table itself.  However the table is allocated by dma_alloc_coherent()
which allocates pages (i.e. aligned to a page boundary).
For simplicity just check it is 8-byte aligned, but add a comment
that some Intel controllers actually require 8-byte alignment
even when using 32-bit DMA.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-12-22 11:32:16 +01:00
..
android-goldfish.c mmc: android-goldfish: remove incorrect __iomem annotation 2015-09-01 14:19:11 +02:00
atmel-mci.c mmc: atmel-mci: atmci_convert_chksize depends on controller version 2015-12-22 11:32:11 +01:00
au1xmmc.c mmc: host: drop owner assignment from platform_drivers 2014-10-20 16:20:56 +02:00
bfin_sdh.c mmc: bfin_sdh: Move away from using deprecated APIs 2013-10-30 20:26:36 -04:00
cb710-mmc.c mmc: cb710: Move away from using deprecated APIs 2013-10-30 20:26:37 -04:00
cb710-mmc.h
davinci_mmc.c mmc: davinci: Constify platform_device_id 2015-06-01 09:06:49 +02:00
dw_mmc-exynos.c mmc: mmc: extend the mmc_send_tuning() 2015-10-27 10:38:41 +01:00
dw_mmc-exynos.h mmc: dw_mmc: exynos: Support eMMC's HS400 mode 2015-03-23 14:13:28 +01:00
dw_mmc-k3.c mmc: dw_mmc: k3: Fix modalias to make module auto-loading work 2015-06-01 09:07:05 +02:00
dw_mmc-pci.c mmc: dw_mmc-pci: Remove superflous #else condition on CONFIG_PM_SLEEP 2014-09-09 13:59:05 +02:00
dw_mmc-pltfm.c mmc: dw_mmc: Add external dma interface support 2015-10-26 16:00:16 +01:00
dw_mmc-pltfm.h
dw_mmc-rockchip.c mmc: core: Remove MMC_CAP_RUNTIME_RESUME as it's redundant 2015-12-22 11:32:03 +01:00
dw_mmc.c mmc: dw_mmc: fix the wrong setting for UHS-DDR50 mode 2015-10-29 11:00:43 +01:00
dw_mmc.h mmc: dw_mmc: fix the CardThreshold boundary at CardThrCtl register 2015-10-29 11:00:37 +01:00
jz4740_mmc.c mmc: remove .owner field for drivers using module_platform_driver 2014-09-09 13:59:04 +02:00
Kconfig mmc: mvsdio: delete platform data code path 2015-12-22 11:32:12 +01:00
Makefile mmc: sdhci-pci: Build o2micro support in the same module 2015-10-26 16:00:05 +01:00
mmc_spi.c spi: Updates for v4.4 2015-11-05 13:15:12 -08:00
mmci.c mmc: mmci: Cascade EPROBE_DEFER from regulators. 2015-03-25 09:46:35 +01:00
mmci.h mmc: mmci: Add Qcom specific rx_fifocnt logic. 2014-07-09 11:25:57 +02:00
mmci_qcom_dml.c mmc: mmci: Add qcom dml support to the driver. 2014-09-09 13:58:46 +02:00
mmci_qcom_dml.h mmc: mmci: Add qcom dml support to the driver. 2014-09-09 13:58:46 +02:00
moxart-mmc.c mmc: moxart: Fix module autoload for OF platform driver 2015-10-26 15:59:57 +01:00
mtk-sd.c mmc: core: Remove MMC_CAP_RUNTIME_RESUME as it's redundant 2015-12-22 11:32:03 +01:00
mvsdio.c mmc: mvsdio: delete platform data code path 2015-12-22 11:32:12 +01:00
mvsdio.h
mxcmmc.c mmc: host: mxcmmc: Simplify a trivial if-return sequence 2015-06-01 09:07:02 +02:00
mxs-mmc.c mmc: mxs: Constify platform_device_id 2015-06-01 09:06:50 +02:00
of_mmc_spi.c
omap.c mmc: omap: Fix module autoload for OF platform driver 2015-10-26 15:59:58 +01:00
omap_hsmmc.c mmc: omap_hsmmc: No need to check DMA channel validity at module remove 2015-12-22 11:32:02 +01:00
pxamci.c mmc: pxamci: fix read-only gpio detection polarity 2015-11-09 13:04:03 +01:00
pxamci.h
rtsx_pci_sdmmc.c mmc: rtsx: Constify platform_device_id 2015-06-01 09:06:50 +02:00
rtsx_usb_sdmmc.c mmc: rtsx: Constify platform_device_id 2015-06-01 09:06:50 +02:00
s3cmci.c mmc: s3cmci: Constify platform_device_id 2015-06-01 09:06:51 +02:00
s3cmci.h mmc: s3cmci: port DMA code to dmaengine API 2014-07-09 11:26:13 +02:00
sdhci-acpi.c mmc: sdhci-acpi: Add more ACPI HIDs for Intel controllers 2015-10-26 16:00:20 +01:00
sdhci-bcm-kona.c mmc: sdhci-bcm-kona: fix logic to check for 8-bit data width 2015-10-26 15:59:55 +01:00
sdhci-bcm2835.c mmc: sdhci-bcm2835: Actually enable the clock 2015-06-01 09:56:07 +02:00
sdhci-cns3xxx.c mmc: sdhci: set the .remove to sdhci_pltfm_unregister() 2015-03-23 14:13:35 +01:00
sdhci-dove.c mmc: sdhci: set the .remove to sdhci_pltfm_unregister() 2015-03-23 14:13:35 +01:00
sdhci-esdhc-imx.c mmc: sdhci-esdhc-imx: correct the tuning-step setting 2015-12-22 11:32:09 +01:00
sdhci-esdhc.h mmc: sdhci-of-esdhc: support both BE and LE host controller 2015-10-26 16:00:08 +01:00
sdhci-iproc.c mmc: sdhci-iproc: fix oops in sdhci_iproc_writew 2015-03-23 14:13:47 +01:00
sdhci-msm.c mmc: mmc: extend the mmc_send_tuning() 2015-10-27 10:38:41 +01:00
sdhci-of-arasan.c mmc: sdhci-of-arasan: Add the support for sdhci-5.1 2015-08-27 14:50:54 +02:00
sdhci-of-at91.c mmc: sdhci-of-at91: add PM support 2015-12-22 11:32:06 +01:00
sdhci-of-esdhc.c mmc: sdhci-of-esdhc: add/remove some quirks according to vendor version 2015-12-22 11:32:11 +01:00
sdhci-of-hlwd.c mmc: sdhci: set the .remove to sdhci_pltfm_unregister() 2015-03-23 14:13:35 +01:00
sdhci-pci-core.c mmc: sdhci-pci: Do not default to 33 Ohm driver strength for Intel SPT 2015-12-22 11:32:14 +01:00
sdhci-pci-data.c mmc: sdhci-pci: Add support for drive strength selection for SPT 2015-06-01 09:07:14 +02:00
sdhci-pci-o2micro.c mmc: sdhci-pci: Make sdhci_pci_o2_fujin2_pci_init() static 2015-10-26 16:00:05 +01:00
sdhci-pci-o2micro.h mmc: sdhci-pci: Make sdhci_pci_o2_fujin2_pci_init() static 2015-10-26 16:00:05 +01:00
sdhci-pci.h mmc: sdhci-pci: Add more PCI IDs for Intel controllers 2015-10-26 16:00:19 +01:00
sdhci-pltfm.c mmc: core: enable support for the standard "wakeup-source" property 2015-12-22 11:32:01 +01:00
sdhci-pltfm.h mmc: sdhci-pltfm: export pltfm suspend/resume api 2014-01-13 12:48:06 -05:00
sdhci-pxav2.c mmc: sdhci-{pxav2,pxav3}: Use of_match_ptr() macro 2015-06-01 09:06:53 +02:00
sdhci-pxav3.c mmc: sdhci-pxav3: fix error handling of armada_38x_quirks 2015-10-08 19:24:23 +02:00
sdhci-s3c-regs.h
sdhci-s3c.c mmc: sdhci-s3c: Constify platform_device_id 2015-06-01 09:06:52 +02:00
sdhci-sirf.c mmc: mmc: extend the mmc_send_tuning() 2015-10-27 10:38:41 +01:00
sdhci-spear.c Update Viresh Kumar's email address 2015-07-17 16:39:53 -07:00
sdhci-st.c mmc: sdhci-st: Fix modalias to make module auto-loading work 2015-06-01 09:07:07 +02:00
sdhci-tegra.c mmc: tegra: Add Tegra210 support 2015-12-22 11:32:07 +01:00
sdhci.c mmc: sdhci: 64-bit DMA actually has 4-byte alignment 2015-12-22 11:32:16 +01:00
sdhci.h mmc: sdhci: 64-bit DMA actually has 4-byte alignment 2015-12-22 11:32:16 +01:00
sdhci_f_sdh30.c mmc: sdhci_f_sdh30: Fix the size passed to sdhci_alloc_host 2015-06-01 09:06:46 +02:00
sdricoh_cs.c mmc: sdricoh_cs: Move away from using deprecated APIs 2013-10-30 20:28:32 -04:00
sh_mmcif.c mmc: sh_mmcif: rework dma channel handling 2015-12-22 11:32:08 +01:00
sh_mobile_sdhi.c mmc: sh_mobile_sdhi: remove sh_mobile_sdhi_info 2015-03-05 21:54:26 +05:30
sunxi-mmc.c mmc: sunxi: Add card busy detection 2015-10-26 16:00:02 +01:00
tifm_sd.c mmc: Convert pr_warning to pr_warn 2014-09-24 10:13:09 +02:00
tmio_mmc.c mmc: TMIO: Use devm_request_irq() 2015-06-01 09:06:48 +02:00
tmio_mmc.h mmc: tmio: mmc: tmio: tmio_mmc_data has .chan_priv_?x 2015-03-05 21:54:17 +05:30
tmio_mmc_dma.c mmc: tmio: mmc: tmio: tmio_mmc_data has .chan_priv_?x 2015-03-05 21:54:17 +05:30
tmio_mmc_pio.c mmc: tmio: Fix timeout value for command request 2015-08-24 11:25:53 +02:00
toshsd.c mmc: toshsd: Fix unbalanced locking 2015-01-19 09:56:07 +01:00
toshsd.h mmc: add Toshiba PCI SD controller driver 2014-11-26 14:30:58 +01:00
usdhi6rol0.c mmc: usdhi6rol0: fix error return code 2015-08-27 14:50:56 +02:00
ushc.c mmc: ushc: Fix incorrect parameter in sizeof 2014-02-25 15:42:20 -05:00
via-sdmmc.c mmc: via-sdmmc: Move away from using deprecated APIs 2013-10-30 20:28:36 -04:00
vub300.c mmc: vub300: Remove unneded semicolons 2015-10-26 15:59:54 +01:00
wbsd.c mmc: wbsd: Remove unneded semicolon 2015-10-26 15:59:53 +01:00
wbsd.h
wmt-sdmmc.c mmc: constify of_device_id array 2015-03-23 14:13:49 +01:00