diff options
| author | Rahul Sharma <rahul.sharma@samsung.com> | 2012-11-05 21:04:29 +0530 |
|---|---|---|
| committer | Inki Dae <inki.dae@samsung.com> | 2012-12-04 14:46:00 +0900 |
| commit | 4ddc404bc0b3750b015b021653a88943591f40f6 (patch) | |
| tree | 25a80c8528dde1b8147f6d1e26a3425933baf439 /mm/init-mm.c | |
| parent | ea6d66c3a797376d21b23dc8261733ce35970014 (diff) | |
drm: exynos: fix for mapping of dma buffers
This patch fixes the problem of mapping contigous and non contigous dma buffers.
Currently page struct is calculated from the buf->dma_addr which is not the
physical address. It is replaced by buf->pages which points to the page struct
of the first page of contigous memory chunk. This gives the correct page frame
number for mapping.
Non-contigous dma buffers are described using SG table and SG lists. Each
valid SG List is pointing to a single page or group of pages which are
physically contigous. Current implementation just maps the first page of each
SG List and leave the other pages unmapped, leading to a crash. Given solution
finds the page struct for the faulting page through parsing SG table and map it.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Diffstat (limited to 'mm/init-mm.c')
0 files changed, 0 insertions, 0 deletions