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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2014-03-08 00:44:38 +0100 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2014-04-16 16:30:18 +0200 |
| commit | 286f600bc890347f7ec7bd50d33210d53a9095a3 (patch) | |
| tree | e6af94983a711b69aeb5f5208fc6082d3ab3442d /drivers/iommu | |
| parent | iommu/omap: Remove comment about supporting single page mappings only (diff) | |
| download | linux-286f600bc890347f7ec7bd50d33210d53a9095a3.tar.xz linux-286f600bc890347f7ec7bd50d33210d53a9095a3.zip | |
iommu/omap: Fix map protection value handling
The prot flags passed to the IOMMU map handler are defined in
include/linux/iommu.h as IOMMU_(READ|WRITE|CACHE|EXEC). However, the
driver expects to receive MMU_RAM_* OMAP-specific flags. This causes
IOMMU flags being interpreted as page sizes, leading to failures.
Hardcode the OMAP mapping parameters to little-endian, 8-bits and
non-mixed page attributes. Furthermore, as the OMAP IOMMU doesn't
support read-only or write-only mappings, ignore the prot value.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Suman Anna <s-anna@ti.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index 31cebf20285c..895af06a667f 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -1041,8 +1041,7 @@ static void iopte_cachep_ctor(void *iopte) clean_dcache_area(iopte, IOPTE_TABLE_SIZE); } -static u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, - u32 flags) +static u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, int pgsz) { memset(e, 0, sizeof(*e)); @@ -1050,10 +1049,10 @@ static u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, e->pa = pa; e->valid = MMU_CAM_V; /* FIXME: add OMAP1 support */ - e->pgsz = flags & MMU_CAM_PGSZ_MASK; - e->endian = flags & MMU_RAM_ENDIAN_MASK; - e->elsz = flags & MMU_RAM_ELSZ_MASK; - e->mixed = flags & MMU_RAM_MIXED_MASK; + e->pgsz = pgsz; + e->endian = MMU_RAM_ENDIAN_LITTLE; + e->elsz = MMU_RAM_ELSZ_8; + e->mixed = 0; return iopgsz_to_bytes(e->pgsz); } @@ -1066,7 +1065,7 @@ static int omap_iommu_map(struct iommu_domain *domain, unsigned long da, struct device *dev = oiommu->dev; struct iotlb_entry e; int omap_pgsz; - u32 ret, flags; + u32 ret; omap_pgsz = bytes_to_iopgsz(bytes); if (omap_pgsz < 0) { @@ -1076,9 +1075,7 @@ static int omap_iommu_map(struct iommu_domain *domain, unsigned long da, dev_dbg(dev, "mapping da 0x%lx to pa 0x%x size 0x%x\n", da, pa, bytes); - flags = omap_pgsz | prot; - - iotlb_init_entry(&e, da, pa, flags); + iotlb_init_entry(&e, da, pa, omap_pgsz); ret = omap_iopgtable_store_entry(oiommu, &e); if (ret) |