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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2006-11-11 06:25:04 (GMT) |
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committer | Paul Mackerras <paulus@samba.org> | 2006-12-04 09:38:42 (GMT) |
commit | 868108784ccf0add6ac593bfbc2eb5a0804af48d (patch) | |
tree | 69a2a58dcce8d4639a9b8027e32a82deb6035ca6 /arch/powerpc/platforms/cell/setup.c | |
parent | 12d04eef927bf61328af2c7cbe756c96f98ac3bf (diff) | |
download | linux-fsl-qoriq-868108784ccf0add6ac593bfbc2eb5a0804af48d.tar.xz |
[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: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/setup.c')
-rw-r--r-- | arch/powerpc/platforms/cell/setup.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c index d704bc1..b39753f 100644 --- a/arch/powerpc/platforms/cell/setup.c +++ b/arch/powerpc/platforms/cell/setup.c @@ -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; |