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Commit 86810878 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Paul Mackerras
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[POWERPC] Add DMA ops support for of_platform_device to Cell 



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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 12d04eef

arch/powerpc/platforms/cell/setup.c

+34 −3
Original line number Original line Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <linux/console.h>

#include <linux/console.h>

#include <linux/mutex.h>

#include <linux/mutex.h>

#include <linux/memory_hotplug.h>

#include <linux/memory_hotplug.h>

#include <linux/notifier.h>





#include <asm/mmu.h>

#include <asm/mmu.h>

#include <asm/processor.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 : "");

	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)

static int __init cell_publish_devices(void)

{

{

	if (machine_is(cell))

	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);

	of_platform_bus_probe(NULL, NULL, NULL);



	return 0;

	return 0;

}

}

device_initcall(cell_publish_devices);

device_initcall(cell_publish_devices);
@@ -154,7 +186,6 @@ static void __init cell_setup_arch(void) 
#ifdef CONFIG_SMP

#ifdef CONFIG_SMP

	smp_init_cell();

	smp_init_cell();

#endif

#endif



	/* init to some ~sane value until calibrate_delay() runs */

	/* init to some ~sane value until calibrate_delay() runs */

	loops_per_jiffy = 50000000;

	loops_per_jiffy = 50000000;