On 2020-08-20 16:55, Rob Clark wrote:
Side note, I suspect we'll end up needing something like 0e764a01015dfebff8a8ffd297d74663772e248a .. if someone can dig a 32b device out of the closet and dust it off, the fix is easy enough. Just wanted to mention that here so anyone with a 32b device could find what is needed.
FWIW there shouldn't be any material change here - the generic default domain is installed under the same circumstances as the Arm dma_iommu_mapping was, so if any platform does have an issue, then it should already have started 4 years with f78ebca8ff3d ("iommu/msm: Add support for generic master bindings").
Robin.
BR, -R On Thu, Aug 20, 2020 at 8:09 AM Robin Murphy <robin.murphy@xxxxxxx> wrote:Now that arch/arm is wired up for default domains and iommu-dma, implement the corresponding driver-side support for DMA domains. Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx> --- drivers/iommu/msm_iommu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index 3615cd6241c4..f34efcbb0b2b 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -8,6 +8,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/platform_device.h> +#include <linux/dma-iommu.h> #include <linux/errno.h> #include <linux/io.h> #include <linux/io-pgtable.h> @@ -314,13 +315,16 @@ static struct iommu_domain *msm_iommu_domain_alloc(unsigned type) { struct msm_priv *priv; - if (type != IOMMU_DOMAIN_UNMANAGED) + if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) goto fail_nomem; + if (type == IOMMU_DOMAIN_DMA && iommu_get_dma_cookie(&priv->domain)) + goto fail_nomem; + INIT_LIST_HEAD(&priv->list_attached); priv->domain.geometry.aperture_start = 0; @@ -339,6 +343,7 @@ static void msm_iommu_domain_free(struct iommu_domain *domain) struct msm_priv *priv; unsigned long flags; + iommu_put_dma_cookie(domain); spin_lock_irqsave(&msm_iommu_lock, flags); priv = to_msm_priv(domain); kfree(priv); -- 2.28.0.dirty _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
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