Am Mittwoch, 4. August 2021, 19:15:29 CEST schrieb Robin Murphy: > Now that everyone has converged on iommu-dma for IOMMU_DOMAIN_DMA > support, we can abandon the notion of drivers being responsible for the > cookie type, and consolidate all the management into the core code. > > CC: Marek Szyprowski <[email protected]> > CC: Yoshihiro Shimoda <[email protected]> > CC: Geert Uytterhoeven <[email protected]> > CC: Yong Wu <[email protected]> > CC: Heiko Stuebner <[email protected]> > CC: Chunyan Zhang <[email protected]> > CC: Maxime Ripard <[email protected]> > Reviewed-by: Jean-Philippe Brucker <[email protected]> > Reviewed-by: Lu Baolu <[email protected]> > Signed-off-by: Robin Murphy <[email protected]>
On a Rockchip rk3288 (arm32), rk3399 (arm64) and px30 (arm64) with the graphics pipeline using the iommu Tested-by: Heiko Stuebner <[email protected]> Heiko > > --- > > v3: Use a simpler temporary check instead of trying to be clever with > the error code > --- > drivers/iommu/iommu.c | 7 +++++++ > include/linux/iommu.h | 3 ++- > 2 files changed, 9 insertions(+), 1 deletion(-) > > diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c > index f2cda9950bd5..b65fcc66ffa4 100644 > --- a/drivers/iommu/iommu.c > +++ b/drivers/iommu/iommu.c > @@ -7,6 +7,7 @@ > #define pr_fmt(fmt) "iommu: " fmt > > #include <linux/device.h> > +#include <linux/dma-iommu.h> > #include <linux/kernel.h> > #include <linux/bits.h> > #include <linux/bug.h> > @@ -1946,6 +1947,11 @@ static struct iommu_domain > *__iommu_domain_alloc(struct bus_type *bus, > /* Assume all sizes by default; the driver may override this later */ > domain->pgsize_bitmap = bus->iommu_ops->pgsize_bitmap; > > + /* Temporarily avoid -EEXIST while drivers still get their own cookies > */ > + if (type == IOMMU_DOMAIN_DMA && !domain->iova_cookie && > iommu_get_dma_cookie(domain)) { > + iommu_domain_free(domain); > + domain = NULL; > + } > return domain; > } > > @@ -1957,6 +1963,7 @@ EXPORT_SYMBOL_GPL(iommu_domain_alloc); > > void iommu_domain_free(struct iommu_domain *domain) > { > + iommu_put_dma_cookie(domain); > domain->ops->domain_free(domain); > } > EXPORT_SYMBOL_GPL(iommu_domain_free); > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > index 4997c78e2670..141779d76035 100644 > --- a/include/linux/iommu.h > +++ b/include/linux/iommu.h > @@ -40,6 +40,7 @@ struct iommu_domain; > struct notifier_block; > struct iommu_sva; > struct iommu_fault_event; > +struct iommu_dma_cookie; > > /* iommu fault flags */ > #define IOMMU_FAULT_READ 0x0 > @@ -86,7 +87,7 @@ struct iommu_domain { > iommu_fault_handler_t handler; > void *handler_token; > struct iommu_domain_geometry geometry; > - void *iova_cookie; > + struct iommu_dma_cookie *iova_cookie; > }; > > enum iommu_cap { > _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
