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iwlwifi: pcie: support frag SKBs

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Allow frag SKBs in PCIe and advertise the maximum number of frags
to the opmode. As a fallback. linearize the SKB if it exceeds the
maximum number of fragments. This allows using the hardware better
(filling more TBs) and should improve performance when used by the
opmode.

Also adjust tracing to be able to deal with this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Johannes Berg
2015-04-17 16:38:31 +02:00
committed by Emmanuel Grumbach
parent 17564dde60
commit 206eea7833
5 changed files with 77 additions and 15 deletions
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7
drivers/net/wireless/iwlwifi/iwl-devtrace-data.h
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@@ -35,8 +35,8 @@
TRACE_EVENT(iwlwifi_dev_tx_data,
TP_PROTO(const struct device *dev,
struct sk_buff *skb,
void *data, size_t data_len),
TP_ARGS(dev, skb, data, data_len),
u8 hdr_len, size_t data_len),
TP_ARGS(dev, skb, hdr_len, data_len),
TP_STRUCT__entry(
DEV_ENTRY
@@ -45,7 +45,8 @@ TRACE_EVENT(iwlwifi_dev_tx_data,
TP_fast_assign(
DEV_ASSIGN;
if (iwl_trace_data(skb))
memcpy(__get_dynamic_array(data), data, data_len);
skb_copy_bits(skb, hdr_len,
__get_dynamic_array(data), data_len);
),
TP_printk("[%s] TX frame data", __get_str(dev))
);