powerpc/macio: Add dma_parms support to macio

This adds dma_parms to macio devices and initializes them with
default values. This will allow pata_macio to setup the appropriate
max segment size for the block layer.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 6 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/macio.h b/arch/powerpc/include/asm/macio.h
index 2b7b39294a6a..86d5fed1c49f 100644
--- a/arch/powerpc/include/asm/macio.h
+++ b/arch/powerpc/include/asm/macio.h
@@ -39,6 +39,7 @@ struct macio_dev
         struct macio_bus        *bus;           /* macio bus this device is on */
         struct macio_dev        *media_bay;     /* Device is part of a media bay */
         struct of_device        ofdev;
+        struct device_dma_parameters dma_parms; /* ide needs that */
         int                     n_resources;
         struct resource         resource[MACIO_DEV_COUNT_RESOURCES];
         int                     n_interrupts;
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
index 5200acfc9d38..26a303a1d1ab 100644
--- a/drivers/macintosh/macio_asic.c
+++ b/drivers/macintosh/macio_asic.c
@@ -379,6 +379,11 @@ static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
         dev->ofdev.dev.parent = parent;
         dev->ofdev.dev.bus = &macio_bus_type;
         dev->ofdev.dev.release = macio_release_dev;
+        dev->ofdev.dev.dma_parms = &dev->dma_parms;
+
+        /* Standard DMA paremeters */
+        dma_set_max_seg_size(&dev->ofdev.dev, 65536);
+        dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
 
 #ifdef CONFIG_PCI
         /* Set the DMA ops to the ones from the PCI device, this could be