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iwlwifi: add FIFO usage for 5000

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This is part of the code, but the comment doesn't have it,
add pointers to the code and the FIFO usage for 5000 and
up.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-11-06 14:52:53 -08:00 committed by John W. Linville
parent bed0a68f98
commit 681988653e
1 changed files with 16 additions and 3 deletions
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19
drivers/net/wireless/iwlwifi/iwl-prph.h
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@ -254,7 +254,8 @@
* device. A queue maps to only one (selectable by driver) Tx DMA channel,
* but one DMA channel may take input from several queues.
*
* Tx DMA channels have dedicated purposes. For 4965, they are used as follows:
* Tx DMA channels have dedicated purposes. For 4965, they are used as follows
* (cf. default_queue_to_tx_fifo in iwl-4965.c):
*
* 0 -- EDCA BK (background) frames, lowest priority
* 1 -- EDCA BE (best effort) frames, normal priority
@ -265,9 +266,21 @@
* 6 -- HCCA long frames
* 7 -- not used by driver (device-internal only)
*
* For 5000 series and up, they are used slightly differently
* (cf. iwl5000_default_queue_to_tx_fifo in iwl-5000.c):
*
* 0 -- EDCA BK (background) frames, lowest priority
* 1 -- EDCA BE (best effort) frames, normal priority
* 2 -- EDCA VI (video) frames, higher priority
* 3 -- EDCA VO (voice) and management frames, highest priority
* 4 -- (TBD)
* 5 -- HCCA short frames
* 6 -- HCCA long frames
* 7 -- Commands
*
* Driver should normally map queues 0-6 to Tx DMA/FIFO channels 0-6.
* In addition, driver can map queues 7-15 to Tx DMA/FIFO channels 0-3 to
* support 11n aggregation via EDCA DMA channels.
* In addition, driver can map the remaining queues to Tx DMA/FIFO
* channels 0-3 to support 11n aggregation via EDCA DMA channels.
*
* The driver sets up each queue to work in one of two modes:
*