From mboxrd@z Thu Jan 1 00:00:00 1970 From: Varun Sethi Subject: [PATCH 2/3 v12] iommu/fsl: Add additional iommu attributes required by the PAMU driver. Date: Mon, 15 Apr 2013 00:42:01 +0530 Message-ID: <1365966722-1804-2-git-send-email-Varun.Sethi@freescale.com> References: <1365966722-1804-1-git-send-email-Varun.Sethi@freescale.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1365966722-1804-1-git-send-email-Varun.Sethi-KZfg59tc24xl57MIdRCFDg@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, stuart.yoder-KZfg59tc24xl57MIdRCFDg@public.gmane.org, scottwood-KZfg59tc24xl57MIdRCFDg@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, galak-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org, benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org Cc: Varun Sethi List-Id: iommu@lists.linux-foundation.org Added the following domain attributes for the FSL PAMU driver: 1. Added new iommu stash attribute, which allows setting of the LIODN specific stash id parameter through IOMMU API. 2. Added an attribute for enabling/disabling DMA to a particular memory window. 3. Added domain attribute to check for PAMUV1 specific constraints. Signed-off-by: Varun Sethi --- -v12 changes: - Moved PAMU specifc stash ids and structures to PAMU header file. - no change in v11. - no change in v10. include/linux/iommu.h | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 2727810..c5dc2b9 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -57,10 +57,26 @@ struct iommu_domain { #define IOMMU_CAP_CACHE_COHERENCY 0x1 #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ +/* + * Following constraints are specifc to PAMUV1: + * -aperture must be power of 2, and naturally aligned + * -number of windows must be power of 2, and address space size + * of each window is determined by aperture size / # of windows + * -the actual size of the mapped region of a window must be power + * of 2 starting with 4KB and physical address must be naturally + * aligned. + * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints. + * The caller can invoke iommu_domain_get_attr to check if the underlying + * iommu implementation supports these constraints. + */ + enum iommu_attr { DOMAIN_ATTR_GEOMETRY, DOMAIN_ATTR_PAGING, DOMAIN_ATTR_WINDOWS, + DOMAIN_ATTR_PAMU_STASH, + DOMAIN_ATTR_PAMU_ENABLE, + DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_MAX, }; -- 1.7.4.1