sh: Kill off broken dma page ops.
There's no point in keeping these around, they've been broken
for some time, and the dmaenging/async_tx framework provides a
far more reasonable interface.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/dma/Kconfig b/arch/sh/drivers/dma/Kconfig
index 99935f9..3338980 100644
--- a/arch/sh/drivers/dma/Kconfig
+++ b/arch/sh/drivers/dma/Kconfig
@@ -36,23 +36,6 @@
support. Setting this to a higher value allows for cascading DMACs
with additional channels.
-config DMA_PAGE_OPS
- bool "Use DMAC for page copy/clear"
- depends on SH_DMA && BROKEN
- help
- Selecting this option will use a dual-address mode configured channel
- in the SH DMAC for copy_page()/clear_page(). Primarily a performance
- hack.
-
-config DMA_PAGE_OPS_CHANNEL
- depends on DMA_PAGE_OPS
- int "DMA channel for sh memory-manager page copy/clear"
- default "3"
- help
- This allows the specification of the dual address dma channel,
- in case channel 3 is unavailable. On the SH4, channels 1,2, and 3
- are dual-address capable.
-
config SH_DMABRG
bool "SH7760 DMABRG support"
depends on CPU_SUBTYPE_SH7760
diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile
index 47c330c..d677d7f 100644
--- a/arch/sh/mm/Makefile
+++ b/arch/sh/mm/Makefile
@@ -8,9 +8,6 @@
obj-$(CONFIG_CPU_SH3) += cache-sh3.o
obj-$(CONFIG_CPU_SH4) += cache-sh4.o
-obj-$(CONFIG_DMA_PAGE_OPS) += pg-dma.o
-obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-
mmu-y := fault-nommu.o tlb-nommu.o pg-nommu.o
mmu-$(CONFIG_MMU) := fault.o clear_page.o copy_page.o tlb-flush.o \
ioremap.o
@@ -27,6 +24,7 @@
obj-$(CONFIG_SH7705_CACHE_32KB) += pg-sh7705.o
endif
+obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o
obj-$(CONFIG_32BIT) += pmb.o
obj-$(CONFIG_NUMA) += numa.o
diff --git a/arch/sh/mm/pg-dma.c b/arch/sh/mm/pg-dma.c
deleted file mode 100644
index bb23679..0000000
--- a/arch/sh/mm/pg-dma.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * arch/sh/mm/pg-dma.c
- *
- * Fast clear_page()/copy_page() implementation using the SH DMAC
- *
- * Copyright (C) 2003 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <asm/semaphore.h>
-#include <asm/mmu_context.h>
-#include <asm/addrspace.h>
-#include <asm/atomic.h>
-#include <asm/page.h>
-#include <asm/dma.h>
-#include <asm/io.h>
-
-/* Channel to use for page ops, must be dual-address mode capable. */
-static int dma_channel = CONFIG_DMA_PAGE_OPS_CHANNEL;
-
-static void copy_page_dma(void *to, void *from)
-{
- /*
- * This doesn't seem to get triggered until further along in the
- * boot process, at which point the DMAC is already initialized.
- * Fix this in the same fashion as clear_page_dma() in the event
- * that this crashes due to the DMAC not being initialized.
- */
-
- flush_icache_range((unsigned long)from, PAGE_SIZE);
- dma_write_page(dma_channel, (unsigned long)from, (unsigned long)to);
- dma_wait_for_completion(dma_channel);
-}
-
-static void clear_page_dma(void *to)
-{
- /*
- * We get invoked quite early on, if the DMAC hasn't been initialized
- * yet, fall back on the slow manual implementation.
- */
- if (dma_info[dma_channel].chan != dma_channel) {
- clear_page_slow(to);
- return;
- }
-
- dma_write_page(dma_channel, (unsigned long)empty_zero_page,
- (unsigned long)to);
-
- /*
- * FIXME: Something is a bit racy here, if we poll the counter right
- * away, we seem to lock. flushing the page from the dcache doesn't
- * seem to make a difference one way or the other, though either a full
- * icache or dcache flush does.
- *
- * The location of this is important as well, and must happen prior to
- * the completion loop but after the transfer was initiated.
- *
- * Oddly enough, this doesn't appear to be an issue for copy_page()..
- */
- flush_icache_range((unsigned long)to, PAGE_SIZE);
-
- dma_wait_for_completion(dma_channel);
-}
-
-static int __init pg_dma_init(void)
-{
- int ret;
-
- ret = request_dma(dma_channel, "page ops");
- if (ret != 0)
- return ret;
-
- copy_page = copy_page_dma;
- clear_page = clear_page_dma;
-
- return ret;
-}
-
-static void __exit pg_dma_exit(void)
-{
- free_dma(dma_channel);
-}
-
-module_init(pg_dma_init);
-module_exit(pg_dma_exit);
-
-MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");
-MODULE_DESCRIPTION("Optimized page copy/clear routines using a dual-address mode capable DMAC channel");
-MODULE_LICENSE("GPL");
-