search for: dma_addrs

The kcalloc() in nouveau_dmem_evict_chunk() will return null if the physical memory has run out. As a result, if we dereference src_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs will happen. Moreover, the GPU is going away. If the kcalloc() fails, we could not evict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL flag in kcalloc(). Finally, as there is no need to have physically contiguous memory, this patch switches kcallo...

...static unsigned long nouveau_dmem_migrate_copy_one(struct nouveau_drm *drm, out_free_page: nouveau_dmem_page_free_locked(drm, dpage); out: + *pfn = NVIF_VMM_PFNMAP_V0_NONE; return 0; } static void nouveau_dmem_migrate_chunk(struct migrate_vma *args, - struct nouveau_drm *drm, dma_addr_t *dma_addrs) + struct nouveau_drm *drm, dma_addr_t *dma_addrs, u64 *pfns) { struct nouveau_fence *fence; unsigned long addr = args->start, nr_dma = 0, i; for (i = 0; addr < args->end; i++) { args->dst[i] = nouveau_dmem_migrate_copy_one(drm, args->vma, - addr, args->src[i], &am...

...IZE, DMA_BIDIRECTIONAL); +out_free_page: + nouveau_dmem_page_free_locked(drm, dpage); +out: + return 0; } -static void -nouveau_dmem_migrate_finalize_and_map(struct nouveau_migrate *migrate) +static void nouveau_dmem_migrate_chunk(struct migrate_vma *args, + struct nouveau_drm *drm, dma_addr_t *dma_addrs) { - struct nouveau_drm *drm = migrate->drm; + struct nouveau_fence *fence; + unsigned long addr = args->start, nr_dma = 0, i; + + for (i = 0; addr < args->end; i++) { + args->dst[i] = nouveau_dmem_migrate_copy_one(drm, args->vma, + addr, args->src[i], &dma_addrs[nr_dm...

On Thu, 23 May 2019 18:22:03 +0200 Michael Mueller <mimu at linux.ibm.com> wrote: > From: Halil Pasic <pasic at linux.ibm.com> > > To support protected virtualization cio will need to make sure the > memory used for communication with the hypervisor is DMA memory. > > Let us introduce one global cio, and some tools for pools seated "one global pool for

On Thu, 23 May 2019 18:22:03 +0200 Michael Mueller <mimu at linux.ibm.com> wrote: > From: Halil Pasic <pasic at linux.ibm.com> > > To support protected virtualization cio will need to make sure the > memory used for communication with the hypervisor is DMA memory. > > Let us introduce one global cio, and some tools for pools seated "one global pool for

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 Fri, May 19, 2023 at 01:49:46PM +0100, Andrew Cooper wrote: > > The alternative would be to finally merge swiotlb-xen into swiotlb, in > > which case we might be able to do this later. Let me see what I can > > do there. > > If that is an option, it would be great to reduce the special-cashing. I think it's doable, and I've been wanting it for a while. I just

...y_one(struct nouveau_drm *drm, > out_free_page: > nouveau_dmem_page_free_locked(drm, dpage); > out: > + *pfn = NVIF_VMM_PFNMAP_V0_NONE; > return 0; > } > > static void nouveau_dmem_migrate_chunk(struct migrate_vma *args, > - struct nouveau_drm *drm, dma_addr_t *dma_addrs) > + struct nouveau_drm *drm, dma_addr_t *dma_addrs, u64 *pfns) > { > struct nouveau_fence *fence; > unsigned long addr = args->start, nr_dma = 0, i; > > for (i = 0; addr < args->end; i++) { > args->dst[i] = nouveau_dmem_migrate_copy_one(drm, args->v...

On 3/6/24 06:01, Duoming Zhou wrote: > The kcalloc() in nouveau_dmem_evict_chunk() will return null if > the physical memory has run out. As a result, if we dereference > src_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs > will happen. > > Moreover, the GPU is going away. If the kcalloc() fails, we could not > evict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL > flag in kcalloc(). > > Finally, as there is no need to have physically contiguous...

The kcalloc() in nouveau_dmem_evict_chunk() will return null if the physical memory has run out. As a result, if we dereference src_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs will happen. This patch uses stack variables to replace the kcalloc(). Fixes: 249881232e14 ("nouveau/dmem: evict device private memory during release") Signed-off-by: Duoming Zhou <duoming at zju.edu.cn> --- drivers/gpu/drm/nouveau/nouveau_dmem....

This allows us to get rid of the LIB82596_DMA_ATTR defined and prepare for untangling the coherent vs non-coherent DMA allocation API. Signed-off-by: Christoph Hellwig <hch at lst.de> --- drivers/net/ethernet/i825xx/lasi_82596.c | 24 ++++++++++------ drivers/net/ethernet/i825xx/lib82596.c | 36 ++++++++---------------- drivers/net/ethernet/i825xx/sni_82596.c | 19 +++++++++---- 3 files

This allows us to get rid of the LIB82596_DMA_ATTR defined and prepare for untangling the coherent vs non-coherent DMA allocation API. Signed-off-by: Christoph Hellwig <hch at lst.de> --- drivers/net/ethernet/i825xx/lasi_82596.c | 24 ++++++++++------ drivers/net/ethernet/i825xx/lib82596.c | 36 ++++++++---------------- drivers/net/ethernet/i825xx/sni_82596.c | 19 +++++++++---- 3 files

The dma-mapping core and the implementations do not change the DMA attributes passed by pointer. Thus the pointer can point to const data. However the attributes do not have to be a bitfield. Instead unsigned long will do fine: 1. This is just simpler. Both in terms of reading the code and setting attributes. Instead of initializing local attributes on the stack and passing pointer to

...ddr_t *dma_addr, u64 *pfn) > > I'll pick up the removal of the not needed addr argument for the patch > introducing nouveau_dmem_migrate_copy_one, thanks, > >> static void nouveau_dmem_migrate_chunk(struct migrate_vma *args, >> - struct nouveau_drm *drm, dma_addr_t *dma_addrs) >> + struct nouveau_drm *drm, dma_addr_t *dma_addrs, u64 *pfns) >> { >> struct nouveau_fence *fence; >> unsigned long addr = args->start, nr_dma = 0, i; >> >> for (i = 0; addr < args->end; i++) { >> args->dst[i] = nouveau_dme...

...static unsigned long nouveau_dmem_migrate_copy_one(struct nouveau_drm *drm, out_free_page: nouveau_dmem_page_free_locked(drm, dpage); out: + *pfn = NVIF_VMM_PFNMAP_V0_NONE; return 0; } static void nouveau_dmem_migrate_chunk(struct nouveau_drm *drm, - struct migrate_vma *args, dma_addr_t *dma_addrs) + struct migrate_vma *args, dma_addr_t *dma_addrs, u64 *pfns) { struct nouveau_fence *fence; unsigned long addr = args->start, nr_dma = 0, i; for (i = 0; addr < args->end; i++) { args->dst[i] = nouveau_dmem_migrate_copy_one(drm, args->src[i], - dma_addrs + nr_dma); +...

This patch adds support for virtual IOMMU to the vmxnet3 module. We switch to DMA consistent mappings for anything we pass to the device. There were a few places where we already did this, but using pci_blah(); these have been fixed to use dma_blah(), along with all new occurrences where we've replaced kmalloc() and friends. Also fix two small bugs: 1) use after free of rq->buf_info in

This patch adds support for virtual IOMMU to the vmxnet3 module. We switch to DMA consistent mappings for anything we pass to the device. There were a few places where we already did this, but using pci_blah(); these have been fixed to use dma_blah(), along with all new occurrences where we've replaced kmalloc() and friends. Also fix two small bugs: 1) use after free of rq->buf_info in

From: Max Gurtovoy <maxg at mellanox.com> Iommu iotlb can be accessed by different cores for performing IO using multiple virt queues. Add a spinlock to synchronize iotlb accesses. This could be easily reproduced when using more than 1 pktgen threads to inject traffic to vdpa simulator. Fixes: 2c53d0f64c06f("vdpasim: vDPA device simulator") Cc: stable at vger.kernel.org

Originally patch 4 was targeted for Jason's rdma tree since other HMM related changes were queued there. Now that those have been merged, these patches just contain changes to nouveau so they could go through any tree. I guess Ben Skeggs' tree would be appropriate. Changes since v2: Added patches 1-3 to fix some minor issues. Eliminated nouveau_find_svmm() since it is easily found.

...; if (src & MIGRATE_PFN_WRITE) @@ -584,8 +592,8 @@ static void nouveau_dmem_migrate_chunk(struct nouveau_drm *drm, unsigned long addr = args->start, nr_dma = 0, i; for (i = 0; addr < args->end; i++) { - args->dst[i] = nouveau_dmem_migrate_copy_one(drm, args->src[i], - dma_addrs + nr_dma, pfns + i); + args->dst[i] = nouveau_dmem_migrate_copy_one(drm, svmm, + args->src[i], dma_addrs + nr_dma, pfns + i); if (!dma_mapping_error(drm->dev->dev, dma_addrs[nr_dma])) nr_dma++; addr += PAGE_SIZE; @@ -616,6 +624,7 @@ nouveau_dmem_migrate_vma(struct nouveau_...