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Hi, This is fifth approach for replacing struct dma_attrs with unsigned long. The main patch (1/44) doing the change is split into many subpatches for easier review (2-42). They should be squashed together when applying. Rebased on v4.7-rc5. For easier testing the patchset is available here: repo: https://github.com/krzk/linux branch: for-nex...

On Thu, Jun 30, 2016 at 10:23:39AM +0200, Krzysztof Kozlowski wrote: > Hi, > > > This is fifth approach for replacing struct dma_attrs with unsigned > long. > > The main patch (1/44) doing the change is split into many subpatches > for easier review (2-42). They should be squashed together when > applying. For all the drm driver patches: Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch> Should I p...

Hi, The fifth version of this patchset was merged by Andrew Morton few days ago. It was rebased on v4.7-rc5 so it missed some ongoing changes. This is just rebase on next-20160713. For easier testing the patchset is available here: repo: https://github.com/krzk/linux branch: for-next/dma-attrs-const-v6 Changes since v5 ================ 1. New patches: 1/46: [media] mtk-vcodec: Remove unused dma_attrs 44/46: remoteproc: qcom: Use unsigned long for dma_attrs 2. 19/46: rebased on next, some more changes inside 3. Added accumulated acks: Marek Szyprowski, Richard Kuo, Konra...

Hi, This is fourth approach for replacing struct dma_attrs with unsigned long. The main patch (1/44) doing the change is split into many subpatches for easier review (2-42). They should be squashed together when applying. *Important:* Patchset is tested on my ARM platforms and *only* build tested on allyesconfigs: ARM, ARM64, i386, x86_64 and pow...

...2023 13:38:24 +0800, Jason Wang <jasowang at redhat.com> wrote: > > > > > > > > On Tue, Feb 14, 2023 at 3:27 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > > > > > > > > > > > > > > > > > Added virtio_dma_map() to map DMA addresses for virtual memory in > > > > > > > > > advance. The purpose is to keep memory mapped across multiple add/get > > > > > > > > > buf operations. > > > > > > > > > > > > > > >...

...> > > > > > On Mon, 20 Feb 2023 13:38:24 +0800, Jason Wang <jasowang at redhat.com> wrote: > > > > > On Tue, Feb 14, 2023 at 3:27 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > > > > > > > > > > > Added virtio_dma_map() to map DMA addresses for virtual memory in > > > > > > advance. The purpose is to keep memory mapped across multiple add/get > > > > > > buf operations. > > > > > > > > > > I wonder if instead of exporting helpers like this, it...

...com> wrote: > > > > > > On Mon, 20 Feb 2023 13:38:24 +0800, Jason Wang <jasowang at redhat.com> wrote: > > > > On Tue, Feb 14, 2023 at 3:27 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > > > > > > > > > Added virtio_dma_map() to map DMA addresses for virtual memory in > > > > > advance. The purpose is to keep memory mapped across multiple add/get > > > > > buf operations. > > > > > > > > I wonder if instead of exporting helpers like this, it might be simple &gt...

...> > > On Mon, 20 Feb 2023 13:38:24 +0800, Jason Wang <jasowang at redhat.com> wrote: > > > > > > On Tue, Feb 14, 2023 at 3:27 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > > > > > > > > > > > > > Added virtio_dma_map() to map DMA addresses for virtual memory in > > > > > > > advance. The purpose is to keep memory mapped across multiple add/get > > > > > > > buf operations. > > > > > > > > > > > > I wonder if instead of exporting h...

...t 3:02 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > On Mon, 20 Feb 2023 13:38:24 +0800, Jason Wang <jasowang at redhat.com> wrote: > > On Tue, Feb 14, 2023 at 3:27 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > > > > > Added virtio_dma_map() to map DMA addresses for virtual memory in > > > advance. The purpose is to keep memory mapped across multiple add/get > > > buf operations. > > > > I wonder if instead of exporting helpers like this, it might be simple > > to just export dma_dev then the u...

...t 3:02 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > On Mon, 20 Feb 2023 13:38:24 +0800, Jason Wang <jasowang at redhat.com> wrote: > > On Tue, Feb 14, 2023 at 3:27 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > > > > > Added virtio_dma_map() to map DMA addresses for virtual memory in > > > advance. The purpose is to keep memory mapped across multiple add/get > > > buf operations. > > > > I wonder if instead of exporting helpers like this, it might be simple > > to just export dma_dev then the u...

Use the new non-coherent DMA API including proper ownership transfers. This includes moving the DMA helpers to lib82596 based of an ifdef to avoid include order problems. Signed-off-by: Christoph Hellwig <hch at lst.de> --- drivers/net/ethernet/i825xx/lasi_82596.c | 25 ++--- drivers/net/ethernet/i825xx/lib82596.c |...

On 09/02/09 01:10, Mitchell E Berger wrote: > I apologize for writing to you directly instead of through an officially > supported channel. No problem. > I''ve filed a bug against glibc in Redhat''s Bugzilla > for an issue that only seems to surface on 64-bit Xen paravirt guests > on AMD hosts. Filing this bug with the distro involved seemed to make > sense,

...include/linux/compile.h CC drivers/gpu/drm/ttm/ttm_agp_backend.o In file included from /usr/src/linux-2.6.31_pvops-xen-rebase.master.tree-2009-08-31/arch/x86/include/asm/agp.h:4, from drivers/gpu/drm/ttm/ttm_agp_backend.c:39: include/linux/swiotlb.h:48: warning: 'enum dma_data_direction' declared inside parameter list include/linux/swiotlb.h:48: warning: its scope is only this definition or declaration, which is probably not what you want include/linux/swiotlb.h:51: warning: 'enum dma_data_direction' declared inside parameter list include/linux/swiotlb.h...

Use the proper modern API to transfer cache ownership for incoherent DMA. Note that this moves the DMA helpers to the main lib82596.c file, so that they can use virt_to_dma. Signed-off-by: Christoph Hellwig <hch at lst.de> --- drivers/net/ethernet/i825xx/lasi_82596.c | 11 +-- drivers/net/ethernet/i825xx/lib82596.c | 114 ++++++++++++++--------- drivers/net/e...

On Mon, 20 Feb 2023 13:38:24 +0800, Jason Wang <jasowang at redhat.com> wrote: > On Tue, Feb 14, 2023 at 3:27 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > > > Added virtio_dma_map() to map DMA addresses for virtual memory in > > advance. The purpose is to keep memory mapped across multiple add/get > > buf operations. > > I wonder if instead of exporting helpers like this, it might be simple > to just export dma_dev then the upper layer can use DMA AP...

Use the new non-coherent DMA API including proper ownership transfers. This includes adding additional calls to dma_sync_desc_dev as the old syncing was rather ad-hoc. Thanks to Thomas Bogendoerfer for debugging the ownership transfer issues. Signed-off-by: Christoph Hellwig <hch at lst.de> --- drivers/net/ethernet/i8...

On Fri, Oct 11, 2019 at 06:25:18PM -0700, Ram Pai wrote: > From: Thiago Jung Bauermann <bauerman at linux.ibm.com> > > In order to safely use the DMA API, virtio needs to know whether DMA > addresses are in fact physical addresses and for that purpose, > dma_addr_is_phys_addr() is introduced. > > cc: Benjamin Herrenschmidt <benh at kernel.crashing.org> > cc: David Gibson <david at gibson.dropbear.id.au> > cc: Micha...

On Fri, Oct 11, 2019 at 06:25:18PM -0700, Ram Pai wrote: > From: Thiago Jung Bauermann <bauerman at linux.ibm.com> > > In order to safely use the DMA API, virtio needs to know whether DMA > addresses are in fact physical addresses and for that purpose, > dma_addr_is_phys_addr() is introduced. > > cc: Benjamin Herrenschmidt <benh at kernel.crashing.org> > cc: David Gibson <david at gibson.dropbear.id.au> > cc: Micha...

Commit "drm/nouveau: port all engines to new engine module format" changed IB size calculation to be less wasteful, but didn't take into account already existing off-by-one bugs :). So: - ib_max is the last entry, so we need to +1 when calculating number of free entries - nv50_dma_wait already does +1 (for FIRE_RING), so we don't need another +1 on nouveau_gem_ioctl_pushbuf side - there are 512 allocated IB entries (and it needs to be round number), so we can accept at most 511 entries from userspace (we need one for FIRE_RING) - fortunately userspace already flush...

Hi all, this series replaced the DMA_ATTR_NON_CONSISTENT flag to dma_alloc_attrs with a separate new dma_alloc_pages API, which is available on all platforms. In addition to cleaning up the convoluted code path, this ensures that other drivers that have asked for better support for non-coherent DMA to pages with incurring bounce buff...