similar to: [GIT PULL v4 0/3] dma and virtio prep patches

here is the 2nd version of providing an DMA API for s390. There are some attempts to unify the dma ops (Christoph) as well as some attempts to make virtio use the dma API (Andy). At kernel summit we concluded that we want to use the same code on all platforms, whereever possible, so having a dummy dma_op might be the easiest solution to keep virtio-ccw as similar as possible to

here is the 2nd version of providing an DMA API for s390. There are some attempts to unify the dma ops (Christoph) as well as some attempts to make virtio use the dma API (Andy). At kernel summit we concluded that we want to use the same code on all platforms, whereever possible, so having a dummy dma_op might be the easiest solution to keep virtio-ccw as similar as possible to

Andy, this is the next and hopefully last version. Seems to work fine when replacing the previous patches in your tree. I have some reviews/acks for patch 2 and 3. patch 1 still needs one ack. Can you replace the patches in your tree and carry them along with your changes? old introduction: ----- There are some attempts to unify the dma ops (Christoph) as well as some attempts to make virtio use

Andy, this is the next and hopefully last version. Seems to work fine when replacing the previous patches in your tree. I have some reviews/acks for patch 2 and 3. patch 1 still needs one ack. Can you replace the patches in your tree and carry them along with your changes? old introduction: ----- There are some attempts to unify the dma ops (Christoph) as well as some attempts to make virtio use

This switches virtio to use the DMA API on Xen and if requested by module option. This fixes virtio on Xen, and it should break anything because it's off by default on everything except Xen PV on x86. To the Xen people: is this okay? If it doesn't work on other Xen variants (PVH? HVM?), can you submit follow-up patches to fix it? To everyone else: we've waffled on this for way too

This switches virtio to use the DMA API on Xen and if requested by module option. This fixes virtio on Xen, and it should break anything because it's off by default on everything except Xen PV on x86. To the Xen people: is this okay? If it doesn't work on other Xen variants (PVH? HVM?), can you submit follow-up patches to fix it? To everyone else: we've waffled on this for way too

This switches virtio to use the DMA API on Xen and if requested by module option. This fixes virtio on Xen, and it should break anything because it's off by default on everything except Xen PV on x86. To the Xen people: is this okay? If it doesn't work on other Xen variants (PVH? HVM?), can you submit follow-up patches to fix it? To everyone else: we've waffled on this for way too

This switches virtio to use the DMA API on Xen and if requested by module option. This fixes virtio on Xen, and it should break anything because it's off by default on everything except Xen PV on x86. To the Xen people: is this okay? If it doesn't work on other Xen variants (PVH? HVM?), can you submit follow-up patches to fix it? To everyone else: we've waffled on this for way too

This switches virtio to use the DMA API on Xen and if requested by module option. This fixes virtio on Xen, and it should break anything because it's off by default on everything except Xen PV on x86. To the Xen people: is this okay? If it doesn't work on other Xen variants (PVH? HVM?), can you submit follow-up patches to fix it? To everyone else: we've waffled on this for way too

This switches virtio to use the DMA API on Xen and if requested by module option. This fixes virtio on Xen, and it should break anything because it's off by default on everything except Xen PV on x86. To the Xen people: is this okay? If it doesn't work on other Xen variants (PVH? HVM?), can you submit follow-up patches to fix it? To everyone else: we've waffled on this for way too

As virtio-ccw now has dma ops, we can no longer default to the PCI ones. Make use of dev_archdata to keep the dma_ops per device. The pci devices now use that to override the default, and the default is changed to use the noop ops for everything that is not PCI. To compile without PCI support we also have to enable the DMA api with virtio. Signed-off-by: Christian Borntraeger <borntraeger at

As virtio-ccw now has dma ops, we can no longer default to the PCI ones. Make use of dev_archdata to keep the dma_ops per device. The pci devices now use that to override the default, and the default is changed to use the noop ops for everything that is not PCI. To compile without PCI support we also have to enable the DMA api with virtio. Signed-off-by: Christian Borntraeger <borntraeger at

From: Christian Borntraeger <borntraeger at de.ibm.com> As virtio-ccw will have dma ops, we can no longer default to the zPCI ones. Make use of dev_archdata to keep the dma_ops per device. The pci devices now use that to override the default, and the default is changed to use the noop ops for everything that does not specify a device specific one. To compile without PCI support we will

As virtio-ccw will have dma ops, we can no longer default to the zPCI ones. Make use of dev_archdata to keep the dma_ops per device. The pci devices now use that to override the default, and the default is changed to use the noop ops for everything that does not specify a device specific one. To compile without PCI support we will enable HAS_DMA all the time, via the default config in lib/Kconfig.

Hi all, this patch series enables xen-swiotlb on arm and arm64. It has been heavily reworked compared to the previous versions in order to achieve better performances and to address review comments. We are not using dma_mark_clean to ensure coherency anymore. We call the platform implementation of map_page and unmap_page. We assume that dom0 has been mapped 1:1 (physical address == machine

Hi, This is third approach (complete this time) for replacing struct dma_attrs with unsigned long. The main patch (2/45) doing the change is split into many subpatches for easier review (3-43). They should be squashed together when applying. *Important:* Patchset is *only* build tested on allyesconfigs: ARM, ARM64, i386, x86_64 and powerpc. Please provide reviewes and tests for other

Hi all, Here''s a work in progress series whcih does a partial revert of the previous swiotlb changes, and does a partial replacement with Becky Bruce''s series. The most important difference is Becky''s use of phys_addr_t rather than page+offset to represent arbitrary pages. This turns out to be simpler. I didn''t replicate the map_single_page changes, since

On Tue, 3 Nov 2015 12:54:39 +0100 Christian Borntraeger <borntraeger at de.ibm.com> wrote: > As virtio-ccw now has dma ops, we can no longer default to the PCI ones. > Make use of dev_archdata to keep the dma_ops per device. The pci devices > now use that to override the default, and the default is changed to use > the noop ops for everything that is not PCI. To compile without

On Tue, 3 Nov 2015 12:54:39 +0100 Christian Borntraeger <borntraeger at de.ibm.com> wrote: > As virtio-ccw now has dma ops, we can no longer default to the PCI ones. > Make use of dev_archdata to keep the dma_ops per device. The pci devices > now use that to override the default, and the default is changed to use > the noop ops for everything that is not PCI. To compile without

We'll need a bit of a wieder audience for this I think.. On Wed, Dec 07, 2016 at 05:11:28PM -0800, Bart Van Assche wrote: > Additionally, introduce set_dma_ops(). A later patch will introduce a > call to that function in the RDMA drivers that will be modified to use > dma_noop_ops. This looks good to me, and we had a lot of talk about this for other purposes for a while.