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Date: Thu, 17 Jul 2014 10:17:36 +0100 From: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com> To: Michal Nazarewicz <mina86@...a86.com>, Ralf Baechle <ralf@...ux-mips.org>, <gregkh@...uxfoundation.org>, <m.szyprowski@...sung.com> CC: <linux-kernel@...r.kernel.org>, <linux-mips@...ux-mips.org> Subject: Re: [PATCH 4/4] mips: dma: Add cma support On 16/07/14 17:39, Michal Nazarewicz wrote: > On Wed, Jul 16 2014, Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com> wrote: >> Adds cma support to the mips architecture. >> >> cma uses memblock. However, mips uses bootmem. > > Does cma_early_percent_memory work correctly then? > Yes it does. All memblock functions work. And this is before bootmem is informed. >> bootmem is informed about any regions reserved by memblock > > Alternatively maybe it would make sense to create a new definition of > dma_contiguous_reserve_area that uses bootmem and choose it based on > some CONFIG_CMA_USE_BOOTMEM which would be selected by MIPS. > Telling bootmem takes only 3 lines. Adding CONFIG_CMA_USE_BOOTMEM would add more functions and maintenance overhead. And it will basically do the same thing. Reserve memory. And tell the bootmem allocator. >> dma api is modified to use cma reserved memory regions when available >> >> Tested using cma_test. cma_test is a simple driver that assigns blocks >> of memory from cma reserved sections. >> >> Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com> > > Acked-by: Michal Nazarewicz <mina86@...a86.com> Thank-you ZubairLK -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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