luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mmc: block: Move files to core

Browse Source 
Once upon a time it made sense to keep the mmc block device driver and its
related code, in its own directory called card. Over time, more an more
functions/structures have become shared through generic mmc header files,
between the core and the card directory. In other words, the relationship
between them has become closer.

By sharing functions/structures via generic header files, it becomes easy
for outside users to abuse them. In a way to avoid that from happen, let's
move the files from card directory into the core directory, as it enables
us to move definitions of functions/structures into mmc core specific
header files.

Note, this is only the first step in providing a cleaner mmc interface for
outside users. Following changes will do the actual cleanup, as that is not
part of this change.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Ulf Hansson 2016-12-08 11:23:49 +01:00
parent ff6af28faf
commit f397c8d80a
12 changed files with 71 additions and 88 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mmc/Kconfig
View File

@ -23,8 +23,6 @@ if MMC
source "drivers/mmc/core/Kconfig"
source "drivers/mmc/card/Kconfig"
source "drivers/mmc/host/Kconfig"
endif # MMC

1
drivers/mmc/Makefile
View File

@ -5,5 +5,4 @@
subdir-ccflags-$(CONFIG_MMC_DEBUG) := -DDEBUG
obj-$(CONFIG_MMC) += core/
obj-$(CONFIG_MMC) += card/
obj-$(subst m,y,$(CONFIG_MMC)) += host/

70
drivers/mmc/card/Kconfig
View File

@ -1,70 +0,0 @@
#
# MMC/SD card drivers
#
comment "MMC/SD/SDIO Card Drivers"
config MMC_BLOCK
tristate "MMC block device driver"
depends on BLOCK
default y
help
Say Y here to enable the MMC block device driver support.
This provides a block device driver, which you can use to
mount the filesystem. Almost everyone wishing MMC support
should say Y or M here.
config MMC_BLOCK_MINORS
int "Number of minors per block device"
depends on MMC_BLOCK
range 4 256
default 8
help
Number of minors per block device. One is needed for every
partition on the disk (plus one for the whole disk).
Number of total MMC minors available is 256, so your number
of supported block devices will be limited to 256 divided
by this number.
Default is 8 to be backwards compatible with previous
hardwired device numbering.
If unsure, say 8 here.
config MMC_BLOCK_BOUNCE
bool "Use bounce buffer for simple hosts"
depends on MMC_BLOCK
default y
help
SD/MMC is a high latency protocol where it is crucial to
send large requests in order to get high performance. Many
controllers, however, are restricted to continuous memory
(i.e. they can't do scatter-gather), something the kernel
rarely can provide.
Say Y here to help these restricted hosts by bouncing
requests back and forth from a large buffer. You will get
a big performance gain at the cost of up to 64 KiB of
physical memory.
If unsure, say Y here.
config SDIO_UART
tristate "SDIO UART/GPS class support"
depends on TTY
help
SDIO function driver for SDIO cards that implements the UART
class, as well as the GPS class which appears like a UART.
config MMC_TEST
tristate "MMC host test driver"
help
Development driver that performs a series of reads and writes
to a memory card in order to expose certain well known bugs
in host controllers. The tests are executed by writing to the
"test" file in debugfs under each card. Note that whatever is
on your card will be overwritten by these tests.
This driver is only of interest to those developing or
testing a host driver. Most people should say N here.

10
drivers/mmc/card/Makefile
View File

@ -1,10 +0,0 @@
#
# Makefile for MMC/SD card drivers
#
obj-$(CONFIG_MMC_BLOCK) += mmc_block.o
mmc_block-objs := block.o queue.o
obj-$(CONFIG_MMC_TEST) += mmc_test.o
obj-$(CONFIG_SDIO_UART) += sdio_uart.o

66
drivers/mmc/core/Kconfig
View File

@ -22,3 +22,69 @@ config PWRSEQ_SIMPLE
This driver can also be built as a module. If so, the module
will be called pwrseq_simple.
config MMC_BLOCK
tristate "MMC block device driver"
depends on BLOCK
default y
help
Say Y here to enable the MMC block device driver support.
This provides a block device driver, which you can use to
mount the filesystem. Almost everyone wishing MMC support
should say Y or M here.
config MMC_BLOCK_MINORS
int "Number of minors per block device"
depends on MMC_BLOCK
range 4 256
default 8
help
Number of minors per block device. One is needed for every
partition on the disk (plus one for the whole disk).
Number of total MMC minors available is 256, so your number
of supported block devices will be limited to 256 divided
by this number.
Default is 8 to be backwards compatible with previous
hardwired device numbering.
If unsure, say 8 here.
config MMC_BLOCK_BOUNCE
bool "Use bounce buffer for simple hosts"
depends on MMC_BLOCK
default y
help
SD/MMC is a high latency protocol where it is crucial to
send large requests in order to get high performance. Many
controllers, however, are restricted to continuous memory
(i.e. they can't do scatter-gather), something the kernel
rarely can provide.
Say Y here to help these restricted hosts by bouncing
requests back and forth from a large buffer. You will get
a big performance gain at the cost of up to 64 KiB of
physical memory.
If unsure, say Y here.
config SDIO_UART
tristate "SDIO UART/GPS class support"
depends on TTY
help
SDIO function driver for SDIO cards that implements the UART
class, as well as the GPS class which appears like a UART.
config MMC_TEST
tristate "MMC host test driver"
help
Development driver that performs a series of reads and writes
to a memory card in order to expose certain well known bugs
in host controllers. The tests are executed by writing to the
"test" file in debugfs under each card. Note that whatever is
on your card will be overwritten by these tests.
This driver is only of interest to those developing or
testing a host driver. Most people should say N here.

4
drivers/mmc/core/Makefile
View File

@ -12,3 +12,7 @@ mmc_core-$(CONFIG_OF) += pwrseq.o
obj-$(CONFIG_PWRSEQ_SIMPLE) += pwrseq_simple.o
obj-$(CONFIG_PWRSEQ_EMMC) += pwrseq_emmc.o
mmc_core-$(CONFIG_DEBUG_FS) += debugfs.o
obj-$(CONFIG_MMC_BLOCK) += mmc_block.o
mmc_block-objs := block.o queue.o
obj-$(CONFIG_MMC_TEST) += mmc_test.o
obj-$(CONFIG_SDIO_UART) += sdio_uart.o

0
drivers/mmc/card/block.c → drivers/mmc/core/block.c
View File

0
drivers/mmc/card/block.h → drivers/mmc/core/block.h
View File

2
drivers/mmc/card/mmc_test.c → drivers/mmc/core/mmc_test.c
View File

@ -1,6 +1,4 @@
/*
* linux/drivers/mmc/card/mmc_test.c
*
* Copyright 2007-2008 Pierre Ossman
*
* This program is free software; you can redistribute it and/or modify

2
drivers/mmc/card/queue.c → drivers/mmc/core/queue.c
View File

@ -1,6 +1,4 @@
/*
* linux/drivers/mmc/card/queue.c
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
* Copyright 2006-2007 Pierre Ossman
*

0
drivers/mmc/card/queue.h → drivers/mmc/core/queue.h
View File

2
drivers/mmc/card/sdio_uart.c → drivers/mmc/core/sdio_uart.c
View File

@ -1,5 +1,5 @@
/*
* linux/drivers/mmc/card/sdio_uart.c - SDIO UART/GPS driver
* SDIO UART/GPS driver
*
* Based on drivers/serial/8250.c and drivers/serial/serial_core.c
* by Russell King.