Marek Szyprowski 87ae01ac7e
dma-mapping: add generic helpers for mapping sgtable objects ...
[ Upstream commit d9d200bcebc1f6e56f0178cbb8db9953e8cc9a11 ]
struct sg_table is a common structure used for describing a memory
buffer. It consists of a scatterlist with memory pages and DMA addresses
(sgl entry), as well as the number of scatterlist entries: CPU pages
(orig_nents entry) and DMA mapped pages (nents entry).
It turned out that it was a common mistake to misuse nents and orig_nents
entries, calling DMA-mapping functions with a wrong number of entries or
ignoring the number of mapped entries returned by the dma_map_sg
function.
To avoid such issues, let's introduce a common wrappers operating
directly on the struct sg_table objects, which take care of the proper
use of the nents and orig_nents entries.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com >
Reviewed-by: Robin Murphy <robin.murphy@arm.com >
Signed-off-by: Christoph Hellwig <hch@lst.de >
Stable-dep-of: d37c120b7312 ("drm/etnaviv: don't truncate physical page address")
Signed-off-by: Sasha Levin <sashal@kernel.org >
[uli: backport to 4.19]
Signed-off-by: Ulrich Hecht <uli@kernel.org >
2025-09-16 13:55:07 +02:00
2023-01-18 11:29:59 +01:00
2022-08-25 11:15:23 +02:00
2025-07-17 10:07:57 +02:00
2022-06-14 16:59:39 +02:00
2023-08-11 11:45:16 +02:00
2022-09-05 10:26:29 +02:00
2022-09-15 12:17:02 +02:00
2023-05-30 12:42:14 +01:00
2025-05-08 11:55:42 +02:00
2024-02-23 08:12:39 +01:00
2024-07-18 11:39:39 +02:00
2025-08-13 09:44:37 +02:00
2022-10-26 13:19:32 +02:00
2025-07-17 10:08:05 +02:00
2025-06-11 10:19:25 +02:00
2024-09-04 13:12:59 +02:00
2023-06-09 10:23:56 +02:00
2022-11-10 17:46:56 +01:00
2022-04-15 14:14:41 +02:00
2024-12-05 10:59:42 +01:00
2024-02-23 08:12:46 +01:00
2022-09-15 12:17:02 +02:00
2022-07-21 21:09:26 +02:00
2022-12-14 11:28:27 +01:00
2024-11-08 16:19:18 +01:00
2024-07-18 11:39:31 +02:00
2023-08-08 19:49:17 +02:00
2023-12-13 17:42:15 +01:00
2024-09-04 13:12:59 +02:00
2023-04-05 11:15:42 +02:00
2023-12-20 15:38:01 +01:00
2023-05-17 11:13:06 +02:00
2024-02-23 08:12:40 +01:00
2025-09-16 13:55:07 +02:00
2024-02-23 08:12:53 +01:00
2022-10-26 13:19:31 +02:00
2025-02-07 03:34:24 +01:00
2022-11-10 17:46:55 +01:00
2024-05-17 11:42:37 +02:00
2023-09-23 10:47:59 +02:00
2024-09-04 13:13:08 +02:00
2024-04-13 12:50:14 +02:00
2024-07-18 11:39:35 +02:00
2023-04-20 12:04:39 +02:00
2024-04-13 12:50:12 +02:00
2025-07-17 10:08:05 +02:00
2024-03-26 18:22:37 -04:00
2024-02-23 08:12:55 +01:00
2023-02-22 12:47:20 +01:00
2022-06-25 11:49:07 +02:00
2024-08-19 05:31:56 +02:00
2025-02-07 03:34:27 +01:00
2023-09-23 10:48:11 +02:00
2023-10-10 21:44:57 +02:00
2025-02-07 03:34:27 +01:00
2023-03-11 16:31:51 +01:00
2023-10-25 11:16:17 +02:00
2025-05-08 11:55:41 +02:00
2022-10-26 13:19:35 +02:00
2023-06-28 10:15:27 +02:00
2024-11-08 16:19:06 +01:00
2024-12-05 10:59:31 +01:00
2025-04-03 10:09:44 +02:00
2023-03-11 16:31:35 +01:00
2023-02-06 07:49:46 +01:00
2022-07-02 16:27:39 +02:00
2022-08-25 11:15:23 +02:00
2023-03-11 16:31:51 +01:00
2025-04-03 10:09:49 +02:00
2025-02-07 03:34:23 +01:00
2023-10-10 21:45:00 +02:00
2024-02-23 08:12:58 +01:00
2022-06-14 16:59:25 +02:00
2023-01-18 11:30:49 +01:00
2023-10-25 11:16:31 +02:00
2022-06-25 11:49:12 +02:00
2022-12-08 11:18:34 +01:00
2022-04-15 14:15:07 +02:00
2022-11-23 07:53:44 +01:00
2024-06-16 13:23:35 +02:00
2023-09-23 10:47:59 +02:00
2022-05-18 09:42:47 +02:00
2025-04-04 11:11:26 +02:00
2023-06-21 15:39:57 +02:00
2023-06-21 15:39:57 +02:00
2025-05-05 15:34:17 +02:00
2022-04-15 14:15:03 +02:00
2025-06-11 10:19:26 +02:00
2023-09-23 10:47:58 +02:00
2023-08-11 11:45:06 +02:00
2022-06-14 16:59:38 +02:00
2023-02-25 11:51:51 +01:00
2024-07-05 09:00:32 +02:00
2022-11-01 19:05:40 +01:00
2025-04-03 10:09:42 +02:00
2025-04-04 11:11:27 +02:00
2023-09-23 10:48:11 +02:00
2025-06-11 10:19:55 +02:00
2023-12-13 17:42:19 +01:00
2023-02-22 12:47:17 +01:00
2023-11-08 11:22:18 +01:00
2023-08-11 11:45:40 +02:00
2025-03-11 08:34:59 +01:00
2023-06-09 10:23:54 +02:00
2025-04-04 11:35:21 +02:00
2022-06-25 11:49:11 +02:00
2023-11-20 10:29:18 +01:00
2023-05-17 11:13:28 +02:00
2023-01-18 11:30:11 +01:00
2022-06-14 16:59:13 +02:00
2023-11-28 16:46:33 +00:00
2024-03-26 18:22:40 -04:00
2023-10-25 11:16:20 +02:00
2023-10-25 11:16:20 +02:00
2023-08-30 16:31:56 +02:00
2023-02-25 11:51:50 +01:00
2022-07-02 16:27:31 +02:00
2023-06-28 10:15:28 +02:00
2024-09-12 11:02:55 +02:00
2022-09-05 10:26:34 +02:00
2023-11-08 11:22:19 +01:00
2022-07-12 16:29:03 +02:00
2022-09-05 10:26:28 +02:00
2024-02-23 08:12:58 +01:00
2023-08-11 11:45:22 +02:00
2024-05-02 16:17:14 +02:00
2023-03-22 13:27:11 +01:00
2022-06-25 11:49:11 +02:00
2023-05-30 12:42:13 +01:00
2024-05-25 16:16:19 +02:00
2024-07-05 09:00:35 +02:00
2023-02-06 07:49:44 +01:00
2023-08-11 11:45:27 +02:00
2023-05-17 11:13:22 +02:00
2024-04-13 12:50:03 +02:00
2023-01-18 11:30:05 +01:00
2022-06-25 11:49:10 +02:00
2025-02-07 03:34:27 +01:00
2023-03-22 13:27:11 +01:00
2022-07-29 17:10:37 +02:00
2023-05-17 11:13:27 +02:00
2025-07-17 10:07:54 +02:00
2024-02-23 08:12:39 +01:00
2025-03-11 08:35:00 +01:00
2025-02-07 03:34:21 +01:00
2023-08-30 16:31:49 +02:00
2023-05-17 11:13:15 +02:00
2023-08-11 11:45:17 +02:00
87ae01ac7e