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iwlwifi: add support for 12K Receive Buffers

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802.11ac allows A-MSDU that can be up to 12KB long. Since
an entire A-MSDU needs to fit into one single Receive
Buffer (RB), add support for big RBs.
Since this adds lots of pressure to the memory manager and
significantly increase the true_size of the RX buffers,
don't enable this by default.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Emmanuel Grumbach
2015-11-10 11:57:41 +02:00
parent 7d1620451d
commit 6c4fbcbc1c
10 changed files with 90 additions and 21 deletions
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20
drivers/net/wireless/intel/iwlwifi/iwl-trans.h
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@@ -423,6 +423,22 @@ enum iwl_trans_status {
STATUS_TRANS_DEAD,
};
static inline int
iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size)
{
switch (rb_size) {
case IWL_AMSDU_4K:
return get_order(4 * 1024);
case IWL_AMSDU_8K:
return get_order(8 * 1024);
case IWL_AMSDU_12K:
return get_order(12 * 1024);
default:
WARN_ON(1);
return -1;
}
}
/**
* struct iwl_trans_config - transport configuration
*
@@ -436,7 +452,7 @@ enum iwl_trans_status {
* list of such notifications to filter. Max length is
* %MAX_NO_RECLAIM_CMDS.
* @n_no_reclaim_cmds: # of commands in list
* @rx_buf_size_8k: 8 kB RX buffer size needed for A-MSDUs,
* @rx_buf_size: RX buffer size needed for A-MSDUs
* if unset 4k will be the RX buffer size
* @bc_table_dword: set to true if the BC table expects the byte count to be
* in DWORD (as opposed to bytes)
@@ -456,7 +472,7 @@ struct iwl_trans_config {
const u8 *no_reclaim_cmds;
unsigned int n_no_reclaim_cmds;
bool rx_buf_size_8k;
enum iwl_amsdu_size rx_buf_size;
bool bc_table_dword;
bool scd_set_active;
bool wide_cmd_header;