From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1ShJXY-0002FY-Ug for barebox@lists.infradead.org; Wed, 20 Jun 2012 11:57:41 +0000 From: Marc Kleine-Budde Date: Wed, 20 Jun 2012 13:57:29 +0200 Message-Id: <1340193455-2229-1-git-send-email-mkl@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 0/6] fix dma memory allocations, add dma_alloc/dma_free To: sha@pengutronix.de Cc: barebox@lists.infradead.org on ARM using dfu mode we've seen problems with dma memory allocations. Some drivers use dma_inv_range on allocated buffers, which corrupts memory around the buffer, it it's not aligned to cache lines. This series introduces: dma_alloc() and dma_free() that allocate memory aligned to cache lines. This is 64 bytes on ARM (just to be sure) and DCACHE_LINE_SIZE on nios2. All other arch do a transparent xmalloc. Feel free to add the appropriate alignment for your architecture to "include/asm/dma.h". If you do so add a #define dma_alloc dma_alloc #define dma_free dma_free to your "asm/dma.h" so that the generic funtion won't be used. changes since v1: - align size to cache line size, too (tnx Sascha) - provide a generic "include/dma.h" which implements generic fallbacks using ifndef dma_{alloc,free} magic. - add includes to arm and nions implementations regards, Marc _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox