diff options
author | Reinette Chatre <reinette.chatre@intel.com> | 2009-04-21 10:55:48 -0700 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2009-04-21 16:43:34 -0400 |
commit | df833b1d73680f9f9dc72cbc3215edbbc6ab740d (patch) | |
tree | 07b4e4c829c8e9c2c31936b4db7ad3553d9dafc6 /drivers/net/wireless/iwlwifi/iwl-3945.h | |
parent | d2ee9cd2e2bdfa2e5817142d6f044697066d3977 (diff) | |
download | kernel_samsung_smdk4412-df833b1d73680f9f9dc72cbc3215edbbc6ab740d.zip kernel_samsung_smdk4412-df833b1d73680f9f9dc72cbc3215edbbc6ab740d.tar.gz kernel_samsung_smdk4412-df833b1d73680f9f9dc72cbc3215edbbc6ab740d.tar.bz2 |
iwlwifi: DMA fixes
A few issues wrt DMA were uncovered when using the driver with swiotlb.
- driver should not use memory after it has been mapped
- iwl3945's RX queue management cannot use all of iwlagn because
the size of the RX buffer is different. Revert back to using
iwl3945 specific routines that map/unmap memory.
- no need to "dma_syn_single_range_for_cpu" followed by pci_unmap_single,
we can just call pci_unmap_single initially
- only map the memory area that will be used by device. this is especially
relevant to the mapping of iwl_cmd. we should not map the entire
structure because the meta data at the beginning of structure contains
the address to be used later for unmapping. If the address to be used for
unmapping is stored in mapped data it creates a problem.
- ensure that _if_ memory needs to be modified after it is mapped that we
call _sync_single_for_cpu first, and then release it back to device with
_sync_single_for_device
- we mapped the wrong length of data for host commands, with mapped length
differing with length provided to device, fix that.
Thanks to Jason Andryuk <jandryuk@gmail.com> for significant bisecting
help to find these issues.
This fixes http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=1964
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Jason Andryuk <jandryuk@gmail.com>
Tested-by: Ben Gamari <bgamari@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-3945.h')
-rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-3945.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.h b/drivers/net/wireless/iwlwifi/iwl-3945.h index ab7aaf6..5518884 100644 --- a/drivers/net/wireless/iwlwifi/iwl-3945.h +++ b/drivers/net/wireless/iwlwifi/iwl-3945.h @@ -215,6 +215,7 @@ extern int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm); extern int iwl3945_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq, int count, u32 id); extern void iwl3945_rx_replenish(void *data); +extern void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq); extern void iwl3945_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq); extern int iwl3945_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data); |