diff options
| author | Guzman Lugo, Fernando <x0095840@ti.com> | 2010-12-15 03:54:03 +0300 |
|---|---|---|
| committer | Hari Kanigeri <h-kanigeri2@ti.com> | 2010-12-15 20:29:10 +0300 |
| commit | c7f4ab26e3bcdaeb3e19ec658e3ad9092f1a6ceb (patch) | |
| tree | b80f93995d8e9daa1f53a18c105e8d532102cd21 /arch/arm/plat-omap/iovmm.c | |
| parent | 9205a109fbeee180254bb5a4020eb71d50735944 (diff) | |
| download | linux-c7f4ab26e3bcdaeb3e19ec658e3ad9092f1a6ceb.tar.xz | |
OMAP: iommu: create new api to set valid da range
Some IOMMUs cannot use the whole 0x0 - 0xFFFFFFFF range.
With this new API the valid range can be set.
Signed-off-by: Fernando Guzman Lugo <x0095840@ti.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Diffstat (limited to 'arch/arm/plat-omap/iovmm.c')
| -rw-r--r-- | arch/arm/plat-omap/iovmm.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c index fa6e64332a9e..6dc1296c8c77 100644 --- a/arch/arm/plat-omap/iovmm.c +++ b/arch/arm/plat-omap/iovmm.c @@ -280,13 +280,14 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, alignement = PAGE_SIZE; if (flags & IOVMF_DA_ANON) { - /* - * Reserve the first page for NULL - */ - start = PAGE_SIZE; + start = obj->da_start; + if (flags & IOVMF_LINEAR) alignement = iopgsz_max(bytes); start = roundup(start, alignement); + } else if (start < obj->da_start || start > obj->da_end || + obj->da_end - start < bytes) { + return ERR_PTR(-EINVAL); } tmp = NULL; @@ -299,16 +300,16 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, if (prev_end > start) break; - if (start + bytes <= tmp->da_start) + if (tmp->da_start > start && (tmp->da_start - start) >= bytes) goto found; - if (flags & IOVMF_DA_ANON) + if (tmp->da_end >= start && flags & IOVMF_DA_ANON) start = roundup(tmp->da_end + 1, alignement); prev_end = tmp->da_end; } - if ((start >= prev_end) && (ULONG_MAX - start + 1 >= bytes)) + if ((start >= prev_end) && (obj->da_end - start >= bytes)) goto found; dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n", |