[PATCH v4 0/3] net: macb: fix dma usage

[Steffen Trumtrar <s.trumtrar@pengutronix.de>]

The rx_buffer is only dma_alloc'ed but never properly flushed.
Fix that.

While at it, also use proper volatile access instead of sw barriers.

Also, redefine PKTSIZE to a sensible multiple of 64 bytes.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
Changes in v4:
- align PKTSIZE with cacheline size
- minor style changes
- Link to v3: https://lore.barebox.org/20231129-v2023-08-0-topic-macb-v3-0-65ad6db834dc@pengutronix.de

Changes in v3:
- fix dma_unmap_single direction
- dma_map_single packet in macb_send()
- Link to v2: https://lore.barebox.org/20231129-v2023-08-0-topic-macb-v2-0-4dc2cb4d5d25@pengutronix.de

Changes in v2:
- change dma_map_single to DMA_FROM_DEVICE
- drop (unsigned long) casts in dma_sync_*
- rework writel/setbits/clearbits to keep semantics
- Link to v1: https://lore.barebox.org/20231128-v2023-08-0-topic-macb-v1-0-9faff73bc990@pengutronix.de

---
Steffen Trumtrar (3):
      net: macb: fix dma_alloc for rx_buffer
      net: macb: convert to volatile accesses
      include: net: align PKTSIZE to 64 bytes

 drivers/net/macb.c | 132 +++++++++++++++++++++++++++++------------------------
 include/net.h      |   4 +-
 2 files changed, 75 insertions(+), 61 deletions(-)
---
base-commit: 5f200dd534c848dfa5d948334b6373f0310b8f73
change-id: 20231128-v2023-08-0-topic-macb-0c13ed91179d

Best regards,
-- 
Steffen Trumtrar <s.trumtrar@pengutronix.de>