Mailing List Archive

# HG changeset patch
# User cl349@firebug.cl.cam.ac.uk
# Node ID 57af6b1cfa3a9cf55fa71e6d3fc106b320a21ae5
# Parent 0e9a0a469c6bec37a5b510a6d39500b022a3f06f
Fix I/O port address for first floppy controller on x86_64.
As a consequence, some of the i386 changes over native code need to also be
added to x86-64.

From: Jan Beulich <JBeulich@novell.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>

diff -r 0e9a0a469c6b -r 57af6b1cfa3a linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/floppy.h
--- a/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/floppy.h Mon Feb 20 17:34:21 2006
+++ b/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/floppy.h Mon Feb 20 17:59:41 2006
@@ -14,7 +14,6 @@

#include <linux/vmalloc.h>

-
/*
* The DMA channel used by the floppy controller cannot access data at
* addresses >= 16MB
@@ -25,8 +24,6 @@
*/
#define _CROSS_64KB(a,s,vdma) \
(!(vdma) && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64))
-
-#include <linux/vmalloc.h>

/* XEN: Hit DMA paths on the head. This trick from asm-m68k/floppy.h. */
#include <asm/dma.h>
@@ -43,8 +40,12 @@
#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL)
#define fd_get_dma_residue() vdma_get_dma_residue(FLOPPY_DMA)
-#define fd_dma_mem_alloc(size) vdma_mem_alloc(size)
-#define fd_dma_mem_free(addr, size) vdma_mem_free(addr, size)
+/*
+ * Do not use vmalloc/vfree: floppy_release_irq_and_dma() gets called from
+ * softirq context via motor_off_callback. A generic bug we happen to trigger.
+ */
+#define fd_dma_mem_alloc(size) __get_free_pages(GFP_KERNEL, get_order(size))
+#define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
#define fd_dma_setup(addr, size, mode, io) vdma_dma_setup(addr, size, mode, io)

static int virtual_dma_count;
@@ -137,7 +138,7 @@
"floppy", NULL);
}

-
+#if 0
static unsigned long vdma_mem_alloc(unsigned long size)
{
return (unsigned long) vmalloc(size);
@@ -148,6 +149,7 @@
{
vfree((void *)addr);
}
+#endif

static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
{
@@ -168,7 +170,7 @@
{
use_virtual_dma = 1;
can_use_virtual_dma = 1;
- return 0x340;
+ return 0x3f0;
}

/*

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