diff options
| author | Jerome Glisse <jglisse@redhat.com> | 2010-04-09 16:39:23 +0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-04-20 08:12:05 +0400 |
| commit | 82c5da6bf8b55a931b042fb531083863d26c8020 (patch) | |
| tree | 88168d32d7060598ac730c30967b2e62dc5da28d /drivers/gpu/drm/ttm/ttm_bo.c | |
| parent | 9d87fa2138d06ff400551800d67d522625033e35 (diff) | |
| download | linux-82c5da6bf8b55a931b042fb531083863d26c8020.tar.xz | |
drm/ttm: ttm_fault callback to allow driver to handle bo placement V6
On fault the driver is given the opportunity to perform any operation
it sees fit in order to place the buffer into a CPU visible area of
memory. This patch doesn't break TTM users, nouveau, vmwgfx and radeon
should keep working properly. Future patch will take advantage of this
infrastructure and remove the old path from TTM once driver are
converted.
V2 return VM_FAULT_NOPAGE if callback return -EBUSY or -ERESTARTSYS
V3 balance io_mem_reserve and io_mem_free call, fault_reserve_notify
is responsible to perform any necessary task for mapping to succeed
V4 minor cleanup, atomic_t -> bool as member is protected by reserve
mecanism from concurent access
V5 the callback is now responsible for iomapping the bo and providing
a virtual address this simplify TTM and will allow to get rid of
TTM_MEMTYPE_FLAG_NEEDS_IOREMAP
V6 use the bus addr data to decide to ioremap or this isn't needed
but we don't necesarily need to ioremap in the callback but still
allow driver to use static mapping
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_bo.c')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 40631e2866f8..b42e3fae1bd5 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -632,6 +632,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, evict_mem = bo->mem; evict_mem.mm_node = NULL; + evict_mem.bus.io_reserved = false; placement.fpfn = 0; placement.lpfn = 0; @@ -1005,6 +1006,7 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo, mem.num_pages = bo->num_pages; mem.size = mem.num_pages << PAGE_SHIFT; mem.page_alignment = bo->mem.page_alignment; + mem.bus.io_reserved = false; /* * Determine where to move the buffer. */ @@ -1160,6 +1162,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev, bo->mem.num_pages = bo->num_pages; bo->mem.mm_node = NULL; bo->mem.page_alignment = page_alignment; + bo->mem.bus.io_reserved = false; bo->buffer_start = buffer_start & PAGE_MASK; bo->priv_flags = 0; bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); @@ -1574,7 +1577,7 @@ int ttm_bo_pci_offset(struct ttm_bo_device *bdev, if (ttm_mem_reg_is_pci(bdev, mem)) { *bus_offset = mem->mm_node->start << PAGE_SHIFT; *bus_size = mem->num_pages << PAGE_SHIFT; - *bus_base = man->io_offset; + *bus_base = man->io_offset + (uintptr_t)man->io_addr; } return 0; @@ -1588,8 +1591,8 @@ void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) if (!bdev->dev_mapping) return; - unmap_mapping_range(bdev->dev_mapping, offset, holelen, 1); + ttm_mem_io_free(bdev, &bo->mem); } EXPORT_SYMBOL(ttm_bo_unmap_virtual); |