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[POWERPC] Add DMA ops support for of_platform_device to Cell

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This patch adds a bus device notifier to the of_platform bus type on
cell to setup the DMA operations for of_platform_devices. We currently
use the PCI operations as Cell use a special version of them that
happens to be suitable for our needs.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2006-11-11 17:25:04 +11:00 committed by Paul Mackerras
parent 12d04eef92
commit 868108784c
1 changed files with 34 additions and 3 deletions
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37
arch/powerpc/platforms/cell/setup.c
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@ -30,6 +30,7 @@
#include <linux/console.h>
#include <linux/mutex.h>
#include <linux/memory_hotplug.h>
#include <linux/notifier.h>
#include <asm/mmu.h>
#include <asm/processor.h>
@ -82,10 +83,41 @@ static void cell_progress(char *s, unsigned short hex)
printk("*** %04x : %s\n", hex, s ? s : "");
}
static int cell_of_bus_notify(struct notifier_block *nb, unsigned long action,
void *data)
{
struct device *dev = data;
if (action != BUS_NOTIFY_ADD_DEVICE)
return 0;
/* For now, we just use the PCI DMA ops for everything, though
* we'll need something better when we have a real iommu
* implementation.
*/
dev->archdata.dma_ops = pci_dma_ops;
return 0;
}
static struct notifier_block cell_of_bus_notifier = {
.notifier_call = cell_of_bus_notify
};
static int __init cell_publish_devices(void)
{
if (machine_is(cell))
of_platform_bus_probe(NULL, NULL, NULL);
if (!machine_is(cell))
return 0;
/* Register callbacks on OF platform device addition/removal
* to handle linking them to the right DMA operations
*/
bus_register_notifier(&of_platform_bus_type, &cell_of_bus_notifier);
/* Publish OF platform devices for southbridge IOs */
of_platform_bus_probe(NULL, NULL, NULL);
return 0;
}
device_initcall(cell_publish_devices);
@ -154,7 +186,6 @@ static void __init cell_setup_arch(void)
#ifdef CONFIG_SMP
smp_init_cell();
#endif
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;