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powerpc/swiotlb: Enable at early stage and disable if not necessary

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Remove the dependency on PCI initialization for SWIOTLB initialization.
So that PCI can be initialized at proper time.

SWIOTLB is partly determined by PCI inbound/outbound map which is assigned
in PCI initialization. But swiotlb_init() should be done at the stage of
mem_init() which is much earlier than PCI initialization. So we reserve the
memory for SWIOTLB first and free it if not necessary.

All boards are converted to fit this change.

Signed-off-by: Jia Hongtao <B38951@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Acked-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Jia Hongtao
2012-08-03 18:14:10 +08:00
committed by Kumar Gala
parent 39be5b4a7f
commit 688ba1dbee
7 changed files with 32 additions and 14 deletions
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arch/powerpc/sysdev/fsl_pci.c
+1 -4
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@@ -872,11 +872,8 @@ void __devinit fsl_pci_init(void)
* we need SWIOTLB to handle buffers located outside of
* dma capable memory region
*/
if (memblock_end_of_DRAM() - 1 > max) {
if (memblock_end_of_DRAM() - 1 > max)
ppc_swiotlb_enable = 1;
set_pci_dma_ops(&swiotlb_dma_ops);
ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
}
#endif
}
#endif