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author | Emmanuel Grumbach | 2013-04-30 13:33:04 +0200 |
---|---|---|
committer | Johannes Berg | 2013-05-13 18:12:01 +0200 |
commit | c571573a027bb65ac415141f919df3c0fa0fedb4 (patch) | |
tree | b7e1979d5a54470820779c6ef418857feb3d8626 /drivers/net/wireless/iwlwifi/pcie/trans.c | |
parent | iwlwifi: mvm: Add beacon filtering support (diff) | |
download | kernel-qcow2-linux-c571573a027bb65ac415141f919df3c0fa0fedb4.tar.gz kernel-qcow2-linux-c571573a027bb65ac415141f919df3c0fa0fedb4.tar.xz kernel-qcow2-linux-c571573a027bb65ac415141f919df3c0fa0fedb4.zip |
iwlwifi: pcie: prefer to load the firmware in one shot
Users complained about allocation failures, so we loaded
the firmware in small chunks (PAGE_SIZE). This makes the
firmware restart considerably slower.
So, always prefer to load it in one shot allocating a big
chunk of coherent, and use smaller chunks as a fallback
solution.
On my laptop, this reduces the fw loading time from 120ms
to 20ms.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Moshe Island <moshe.island@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/pcie/trans.c')
-rw-r--r-- | drivers/net/wireless/iwlwifi/pcie/trans.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index 50ba0a468f94..e5365196e5fe 100644 --- a/drivers/net/wireless/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/iwlwifi/pcie/trans.c @@ -405,20 +405,27 @@ static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num, { u8 *v_addr; dma_addr_t p_addr; - u32 offset; + u32 offset, chunk_sz = section->len; int ret = 0; IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n", section_num); - v_addr = dma_alloc_coherent(trans->dev, PAGE_SIZE, &p_addr, GFP_KERNEL); - if (!v_addr) - return -ENOMEM; + v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr, + GFP_KERNEL | __GFP_NOWARN); + if (!v_addr) { + IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n"); + chunk_sz = PAGE_SIZE; + v_addr = dma_alloc_coherent(trans->dev, chunk_sz, + &p_addr, GFP_KERNEL); + if (!v_addr) + return -ENOMEM; + } - for (offset = 0; offset < section->len; offset += PAGE_SIZE) { + for (offset = 0; offset < section->len; offset += chunk_sz) { u32 copy_size; - copy_size = min_t(u32, PAGE_SIZE, section->len - offset); + copy_size = min_t(u32, chunk_sz, section->len - offset); memcpy(v_addr, (u8 *)section->data + offset, copy_size); ret = iwl_pcie_load_firmware_chunk(trans, @@ -432,7 +439,7 @@ static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num, } } - dma_free_coherent(trans->dev, PAGE_SIZE, v_addr, p_addr); + dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr); return ret; } |