From 868108784ccf0add6ac593bfbc2eb5a0804af48d Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sat, 11 Nov 2006 17:25:04 +1100 Subject: [PATCH] [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 Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/cell/setup.c | 37 ++++++++++++++++++++++++++--- 1 file changed, 34 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c index d704bc19a646..b39753f16d48 100644 --- a/arch/powerpc/platforms/cell/setup.c +++ b/arch/powerpc/platforms/cell/setup.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include @@ -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; -- 2.20.1