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author | Ishizaki Kou <kou.ishizaki@toshiba.co.jp> | 2008-04-24 09:28:48 (GMT) |
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committer | Paul Mackerras <paulus@samba.org> | 2008-04-24 11:08:13 (GMT) |
commit | 8ae6e30d2d6b4a7a45bb0d4fa4ecd56e65d24740 (patch) | |
tree | fffced1db7d6a42aecafae84b2cd3a78d159c157 /arch/powerpc/platforms/cell/beat_iommu.c | |
parent | 5a96dfe84b53cc05abe8c7f4d1dfd7b03a3e314a (diff) | |
download | linux-fsl-qoriq-8ae6e30d2d6b4a7a45bb0d4fa4ecd56e65d24740.tar.xz |
[POWERPC] celleb: Move files for Beat mmu and iommu
This moves files for mmu and iommu on Beat into platforms/cell/.
All files in this patch are used by celleb-beat only.
Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/beat_iommu.c')
-rw-r--r-- | arch/powerpc/platforms/cell/beat_iommu.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/beat_iommu.c b/arch/powerpc/platforms/cell/beat_iommu.c new file mode 100644 index 0000000..93b0efd --- /dev/null +++ b/arch/powerpc/platforms/cell/beat_iommu.c @@ -0,0 +1,116 @@ +/* + * Support for IOMMU on Celleb platform. + * + * (C) Copyright 2006-2007 TOSHIBA CORPORATION + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/pci.h> +#include <linux/of_platform.h> + +#include <asm/machdep.h> + +#include "beat_wrapper.h" + +#define DMA_FLAGS 0xf800000000000000UL /* r/w permitted, coherency required, + strongest order */ + +static int __init find_dma_window(u64 *io_space_id, u64 *ioid, + u64 *base, u64 *size, u64 *io_page_size) +{ + struct device_node *dn; + const unsigned long *dma_window; + + for_each_node_by_type(dn, "ioif") { + dma_window = of_get_property(dn, "toshiba,dma-window", NULL); + if (dma_window) { + *io_space_id = (dma_window[0] >> 32) & 0xffffffffUL; + *ioid = dma_window[0] & 0x7ffUL; + *base = dma_window[1]; + *size = dma_window[2]; + *io_page_size = 1 << dma_window[3]; + of_node_put(dn); + return 1; + } + } + return 0; +} + +static unsigned long celleb_dma_direct_offset; + +static void __init celleb_init_direct_mapping(void) +{ + u64 lpar_addr, io_addr; + u64 io_space_id, ioid, dma_base, dma_size, io_page_size; + + if (!find_dma_window(&io_space_id, &ioid, &dma_base, &dma_size, + &io_page_size)) { + pr_info("No dma window found !\n"); + return; + } + + for (lpar_addr = 0; lpar_addr < dma_size; lpar_addr += io_page_size) { + io_addr = lpar_addr + dma_base; + (void)beat_put_iopte(io_space_id, io_addr, lpar_addr, + ioid, DMA_FLAGS); + } + + celleb_dma_direct_offset = dma_base; +} + +static void celleb_dma_dev_setup(struct device *dev) +{ + dev->archdata.dma_ops = get_pci_dma_ops(); + dev->archdata.dma_data = (void *)celleb_dma_direct_offset; +} + +static void celleb_pci_dma_dev_setup(struct pci_dev *pdev) +{ + celleb_dma_dev_setup(&pdev->dev); +} + +static int celleb_of_bus_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + + /* We are only intereted in device addition */ + if (action != BUS_NOTIFY_ADD_DEVICE) + return 0; + + celleb_dma_dev_setup(dev); + + return 0; +} + +static struct notifier_block celleb_of_bus_notifier = { + .notifier_call = celleb_of_bus_notify +}; + +static int __init celleb_init_iommu(void) +{ + celleb_init_direct_mapping(); + set_pci_dma_ops(&dma_direct_ops); + ppc_md.pci_dma_dev_setup = celleb_pci_dma_dev_setup; + bus_register_notifier(&of_platform_bus_type, &celleb_of_bus_notifier); + + return 0; +} + +machine_arch_initcall(celleb_beat, celleb_init_iommu); |