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| author | Sara Sharon <sara.sharon@intel.com> | 2016-02-01 13:46:06 +0200 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2016-03-09 20:59:19 +0200 |
| commit | 7b5424361ec9270f40c3e23cb747cc8b9ee66235 (patch) | |
| tree | d8589441155f0fb6cd3be5efa482154381bfa7bf /drivers/net/wireless/intel/iwlwifi/pcie/rx.c | |
| parent | c9cb14a64c32f890d5a0649cb7d81dbfece33056 (diff) | |
| download | linux-next-7b5424361ec9270f40c3e23cb747cc8b9ee66235.tar.gz | |
iwlwifi: pcie: fine tune number of rxbs
We kick the allocator when we have 2 RBDs that don't have
attached RBs, and the allocator allocates 8 RBs meaning
that it needs another 6 RBDs to attach the RBs to.
The design is that allocator should always have enough RBDs
to fulfill requests, so we give in advance 6 RBDs to the
allocator so that when it is kicked, it gets additional 2 RBDs
and has enough RBDs.
These RBDs were taken from the Rx queue itself, meaning
that each Rx queue didn't have the maximal number of
RBDs, but MAX - 6.
Change initial number of RBDs in the system to include both
queue size and allocator reserves.
Note the multi-queue is always 511 instead of 512 to avoid a
full queue since we cannot detect this state easily enough in
the 9000 arch.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/rx.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c index 509f79003241..98524a006f7a 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -434,7 +434,7 @@ static void iwl_pcie_free_rbs_pool(struct iwl_trans *trans) struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); int i; - for (i = 0; i < MQ_RX_POOL_SIZE; i++) { + for (i = 0; i < RX_POOL_SIZE; i++) { if (!trans_pcie->rx_pool[i].page) continue; dma_unmap_page(trans->dev, trans_pcie->rx_pool[i].page_dma, @@ -835,7 +835,7 @@ int iwl_pcie_rx_init(struct iwl_trans *trans) struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_rxq *def_rxq; struct iwl_rb_allocator *rba = &trans_pcie->rba; - int i, err, num_rbds, allocator_pool_size; + int i, err, queue_size, allocator_pool_size, num_alloc; if (!trans_pcie->rxq) { err = iwl_pcie_rx_alloc(trans); @@ -887,11 +887,12 @@ int iwl_pcie_rx_init(struct iwl_trans *trans) } /* move the pool to the default queue and allocator ownerships */ - num_rbds = trans->cfg->mq_rx_supported ? - MQ_RX_POOL_SIZE : RX_QUEUE_SIZE; + queue_size = trans->cfg->mq_rx_supported ? + MQ_RX_NUM_RBDS : RX_QUEUE_SIZE; allocator_pool_size = trans->num_rx_queues * (RX_CLAIM_REQ_ALLOC - RX_POST_REQ_ALLOC); - for (i = 0; i < num_rbds; i++) { + num_alloc = queue_size + allocator_pool_size; + for (i = 0; i < num_alloc; i++) { struct iwl_rx_mem_buffer *rxb = &trans_pcie->rx_pool[i]; if (i < allocator_pool_size) |