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| author | Johannes Berg <johannes.berg@intel.com> | 2020-04-25 13:04:49 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2020-05-08 09:52:40 +0300 |
| commit | 752d95a2bf6fe207d612fc1febd621df714f5dde (patch) | |
| tree | 4b5f90942a3cc8de46592221fd7d168adb45a9a0 /drivers/net/wireless/intel/iwlwifi/iwl-fh.h | |
| parent | 36dfe9ac6e8b8fc2e25733d003a867a40db791da (diff) | |
| download | linux-stable-752d95a2bf6fe207d612fc1febd621df714f5dde.tar.gz linux-stable-752d95a2bf6fe207d612fc1febd621df714f5dde.tar.bz2 linux-stable-752d95a2bf6fe207d612fc1febd621df714f5dde.zip | |
iwlwifi: pcie: allocate much smaller byte-count table
The hardware needs a byte-count table with the size of each frame
on the queue to build A-MPDUs, but:
* newer generation no longer have the duplicated space at the end,
they can deal with the wrap properly - and we don't even fill
the dup anyway
* we have a maximum queue size of 512 right now and don't use the
theoretical hardware maximum of 65536.
Together, this reduces the byte count table DMA allocation from
64KiB (65536*2 + 64*2 rounded up) to 1 KiB (though that might be
rounded up to a full 4 KiB page by the allocator, not sure it can
share the allocations.)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200425130140.c263b787b5ab.I059507a9760b1ce1d45d84dcaa91629a5cfb58e0@changeid
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/iwl-fh.h')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/iwl-fh.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-fh.h b/drivers/net/wireless/intel/iwlwifi/iwl-fh.h index bf673ce5f183..a8e988281eaf 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-fh.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-fh.h @@ -7,7 +7,7 @@ * * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2015 - 2017 Intel Deutschland GmbH - * Copyright(c) 2018 - 2019 Intel Corporation + * Copyright(c) 2018 - 2020 Intel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -29,7 +29,7 @@ * * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2015 - 2017 Intel Deutschland GmbH - * Copyright(c) 2018 - 2019 Intel Corporation + * Copyright(c) 2018 - 2020 Intel Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -646,8 +646,7 @@ struct iwl_rb_status { #define TFD_QUEUE_CB_SIZE(x) (ilog2(x) - 3) #define TFD_QUEUE_SIZE_BC_DUP (64) #define TFD_QUEUE_BC_SIZE (TFD_QUEUE_SIZE_MAX + TFD_QUEUE_SIZE_BC_DUP) -#define TFD_QUEUE_BC_SIZE_GEN3 (TFD_QUEUE_SIZE_MAX_GEN3 + \ - TFD_QUEUE_SIZE_BC_DUP) +#define TFD_QUEUE_BC_SIZE_GEN3 512 #define IWL_TX_DMA_MASK DMA_BIT_MASK(36) #define IWL_NUM_OF_TBS 20 #define IWL_TFH_NUM_TBS 25 |