diff options
| author | Ping-Ke Shih <pkshih@realtek.com> | 2025-08-26 16:53:18 +0800 |
|---|---|---|
| committer | Ping-Ke Shih <pkshih@realtek.com> | 2025-09-01 10:53:51 +0800 |
| commit | 2d7514829950d6e4ab2fe7b855f21546b3420450 (patch) | |
| tree | d8361dc7c4b0a643de6d729465abb2ec875a8dc7 /rust/helpers/xarray.c | |
| parent | a86a0fea192cf735c1693cef566d5bb8dc2b49fc (diff) | |
wifi: rtw89: pci: add group BD address design
The newly designed group BD address is to use the same starting DMA address
with offset as below picture:
Original DMA memory Group BD address
+--------+ (*1) +---------+ (*2) +--------+
| CH 0 -|-------> | | <-------|- CH 0 | <-+--+--+--+
+--------+ | | | | | | | |
| CH 1 -|-------> | | | CH 1 -|---+ | | |
+--------+ | | | | | | |
| CH 2 -|-------> | | | CH 2 -|------+ | |
+--------+ | | | | | |
| CH 3 -|-------> | | | CH 3 -|---------+ |
+--------+ | | | | |
| : -|-------> | | | : -|------------+
+--------+ | | +--------+ (*3; offset from CH 0)
| CH 8 -|-------> | | <-------|- CH 8 | <-+
+--------+ | | | | | (offset from CH 8)
| : -|-------> | | | : -|---+
+--------+ +---------+ +--------+
Compare (*1) and (*2), for original design, each DMA channel has
individual DMA address, so it is not necessary to allocate continual
DMA address across channels. For group BD address, only two DMA address
are set, and each channel set the offset (*3) from base address.
The element number and offset of a channel are encoded rather than a
raw number, so add a function to translate numbers into hardware format.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250826085318.28361-1-pkshih@realtek.com
Diffstat (limited to 'rust/helpers/xarray.c')
0 files changed, 0 insertions, 0 deletions