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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/iwl-fh.h | |
| parent | c9cb14a64c32f890d5a0649cb7d81dbfece33056 (diff) | |
| download | linux-7b5424361ec9270f40c3e23cb747cc8b9ee66235.tar.bz2 | |
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/iwl-fh.h')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/iwl-fh.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-fh.h b/drivers/net/wireless/intel/iwlwifi/iwl-fh.h index 8af818b10e71..582008a66069 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-fh.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-fh.h @@ -511,9 +511,12 @@ static inline unsigned int FH_MEM_CBBC_QUEUE(unsigned int chnl) */ #define FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN (0x00000002) -#define MQ_RX_TABLE_SIZE 512 -#define MQ_RX_TABLE_MASK (MQ_RX_TABLE_SIZE - 1) -#define MQ_RX_POOL_SIZE MQ_RX_TABLE_MASK +#define MQ_RX_TABLE_SIZE 512 +#define MQ_RX_TABLE_MASK (MQ_RX_TABLE_SIZE - 1) +#define MQ_RX_NUM_RBDS (MQ_RX_TABLE_SIZE - 1) +#define RX_POOL_SIZE (MQ_RX_NUM_RBDS + \ + IWL_MAX_RX_HW_QUEUES * \ + (RX_CLAIM_REQ_ALLOC - RX_POST_REQ_ALLOC)) #define RX_QUEUE_SIZE 256 #define RX_QUEUE_MASK 255 |