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...driver does not need to send > UNMAP requests. The semantics of MAP change and are more complex to > implement. Given a MAP([start:end] -> phys, flags) request: > > (1) If [start:end] isn't mapped, request succeeds as usual. > (2) If [start:end] overlaps an existing mapping [old_start:old_end], we > unmap [max(start, old_start):min(end, old_end)] and replace it with > [start:end]. > (3) If [start:end] overlaps an existing mapping that matches the new map > request exactly (same flags, same phys address), the old mapping is > kept. > > This s...

...driver does not need to send > UNMAP requests. The semantics of MAP change and are more complex to > implement. Given a MAP([start:end] -> phys, flags) request: > > (1) If [start:end] isn't mapped, request succeeds as usual. > (2) If [start:end] overlaps an existing mapping [old_start:old_end], we > unmap [max(start, old_start):min(end, old_end)] and replace it with > [start:end]. > (3) If [start:end] overlaps an existing mapping that matches the new map > request exactly (same flags, same phys address), the old mapping is > kept. > > This s...

...gn ON.\n"); + + return 1; +} +__setup("reassign_resources", set_reassign_resources); + /* This quirk function enables us to force all memory resources which are * assigned to PCI devices, to be page-aligned. */ @@ -41,6 +54,42 @@ int i; struct resource *r; resource_size_t old_start; + + if (reassign_resources) { + if (dev->hdr_type == PCI_HEADER_TYPE_NORMAL && + (dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) { + /* PCI Host Bridge isn''t a target device */ + return; + } + if (is_reassigndev(dev)) { + printk(KERN_INFO + "PCI: Dis...

...speed. In this mode, the driver does not need to send UNMAP requests. The semantics of MAP change and are more complex to implement. Given a MAP([start:end] -> phys, flags) request: (1) If [start:end] isn't mapped, request succeeds as usual. (2) If [start:end] overlaps an existing mapping [old_start:old_end], we unmap [max(start, old_start):min(end, old_end)] and replace it with [start:end]. (3) If [start:end] overlaps an existing mapping that matches the new map request exactly (same flags, same phys address), the old mapping is kept. This squashing could be performed by the...

...eon_ttm.c @@ -265,12 +265,12 @@ static int radeon_move_blit(struct ttm_buffer_object *bo, BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0); /* sync other rings */ - fence = bo->sync_obj; + fence = (struct radeon_fence *)reservation_object_get_excl(bo->resv); r = radeon_copy(rdev, old_start, new_start, new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE), /* GPU pages */ &fence); /* FIXME: handle copy error */ - r = ttm_bo_move_accel_cleanup(bo, (void *)fence, + r = ttm_bo_move_accel_cleanup(bo, &fence->base, evict, no_wait_gpu, new_mem); radeon...

...eon_ttm.c @@ -265,12 +265,12 @@ static int radeon_move_blit(struct ttm_buffer_object *bo, BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0); /* sync other rings */ - fence = bo->sync_obj; + fence = (struct radeon_fence *)reservation_object_get_excl(bo->resv); r = radeon_copy(rdev, old_start, new_start, new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE), /* GPU pages */ &fence); /* FIXME: handle copy error */ - r = ttm_bo_move_accel_cleanup(bo, (void *)fence, + r = ttm_bo_move_accel_cleanup(bo, &fence->base, evict, no_wait_gpu, new_mem); radeon...

This is the initial proposal for a paravirtualized IOMMU device using virtio transport. It contains a description of the device, a Linux driver, and a toy implementation in kvmtool. With this prototype, you can translate DMA to guest memory from emulated (virtio), or passed-through (VFIO) devices. In its simplest form, implemented here, the device handles map/unmap requests from the guest. Future

This is the initial proposal for a paravirtualized IOMMU device using virtio transport. It contains a description of the device, a Linux driver, and a toy implementation in kvmtool. With this prototype, you can translate DMA to guest memory from emulated (virtio), or passed-through (VFIO) devices. In its simplest form, implemented here, the device handles map/unmap requests from the guest. Future

This series depends on the previously posted reservation api patches. 2 of them are not yet in for-next-fences branch of git://git.linaro.org/people/sumit.semwal/linux-3.x.git The missing patches are still in my vmwgfx_wip branch at git://people.freedesktop.org/~mlankhorst/linux All ttm drivers are converted to the fence api, fence_lock is removed and rcu is used in its place. qxl is the first

fence_is_signaled callback should support being run in atomic context, but not in irq context. Signed-off-by: Maarten Lankhorst <maarten.lankhorst at canonical.com> --- include/linux/fence.h | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/include/linux/fence.h b/include/linux/fence.h index d174585b874b..c1a4519ba2f5 100644 ---

This series applies on top of the driver-core-next branch of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git Before converting ttm to the new fence interface I had to fix some drivers to require a reservation before poking with fence_obj. After flipping the switch RCU becomes available instead, and the extra reservations can be dropped again. :-) I've done at least basic