From: "ext Guzman Lugo, Fernando" <fernando.lugo@xxxxxx> Subject: Re: [PATCH 3/3] omap: iovmm: don't check 'da' to set IOVMF_DA_FIXED/IOVMF_DA_ANON flags Date: Tue, 8 Mar 2011 11:59:43 -0600 > On Tue, Mar 8, 2011 at 6:46 AM, David Cohen <dacohen@xxxxxxxxx> wrote: >> Currently IOVMM driver sets IOVMF_DA_FIXED/IOVMF_DA_ANON flags according >> to input 'da' address when mapping memory: >> da == 0: IOVMF_DA_ANON >> da != 0: IOVMF_DA_FIXED >> >> It prevents IOMMU to map first page with fixed 'da'. To avoid such >> issue, IOVMM will not automatically set IOVMF_DA_FIXED. It should now >> come from the user. IOVMF_DA_ANON will be automatically set if >> IOVMF_DA_FIXED isn't set. >> >> Signed-off-by: David Cohen <dacohen@xxxxxxxxx> >> --- >> arch/arm/plat-omap/iovmm.c | 12 ++++++++---- >> 1 files changed, 8 insertions(+), 4 deletions(-) >> >> diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c >> index 11c9b76..dde9cb0 100644 >> --- a/arch/arm/plat-omap/iovmm.c >> +++ b/arch/arm/plat-omap/iovmm.c >> @@ -654,7 +654,8 @@ u32 iommu_vmap(struct iommu *obj, u32 da, const struct sg_table *sgt, >> flags &= IOVMF_HW_MASK; >> flags |= IOVMF_DISCONT; >> flags |= IOVMF_MMIO; >> - flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON); >> + if (~flags & IOVMF_DA_FIXED) >> + flags |= IOVMF_DA_ANON; > > could we use only one? both are mutual exclusive, what happen if flag > is IOVMF_DA_FIXED | IOVMF_DA_ANON? so, I suggest to get rid of > IOVMF_DA_ANON. Then, what about introducing some MACRO? Better names? #define set_iovmf_da_anon(flags) #define set_iovmf_da_fix(flags) #define set_iovmf_mmio(flags) ...... -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
