diff options
Diffstat (limited to 'package/kernel/mac80211/patches/306-ath10k-use-local-memory-instead-of-shadow-descriptor.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/306-ath10k-use-local-memory-instead-of-shadow-descriptor.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/306-ath10k-use-local-memory-instead-of-shadow-descriptor.patch b/package/kernel/mac80211/patches/306-ath10k-use-local-memory-instead-of-shadow-descriptor.patch new file mode 100644 index 0000000..58db2b2 --- /dev/null +++ b/package/kernel/mac80211/patches/306-ath10k-use-local-memory-instead-of-shadow-descriptor.patch @@ -0,0 +1,60 @@ +From: Rajkumar Manoharan <rmanohar@qti.qualcomm.com> +Date: Fri, 23 Oct 2015 18:01:03 +0530 +Subject: [PATCH] ath10k: use local memory instead of shadow descriptor + in ce_send + +Currently to avoid uncached memory access while filling up copy engine +descriptors, shadow descriptors are used. This can be optimized further +by removing shadow descriptors. To achieve that first shadow ring +dependency in ce_send is removed by creating local copy of the +descriptor on stack and make a one-shot copy into the "uncached" +descriptor. + +Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com> +Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com> +--- + +--- a/drivers/net/wireless/ath/ath10k/ce.c ++++ b/drivers/net/wireless/ath/ath10k/ce.c +@@ -274,7 +274,7 @@ int ath10k_ce_send_nolock(struct ath10k_ + { + struct ath10k *ar = ce_state->ar; + struct ath10k_ce_ring *src_ring = ce_state->src_ring; +- struct ce_desc *desc, *sdesc; ++ struct ce_desc *desc, sdesc; + unsigned int nentries_mask = src_ring->nentries_mask; + unsigned int sw_index = src_ring->sw_index; + unsigned int write_index = src_ring->write_index; +@@ -294,7 +294,6 @@ int ath10k_ce_send_nolock(struct ath10k_ + + desc = CE_SRC_RING_TO_DESC(src_ring->base_addr_owner_space, + write_index); +- sdesc = CE_SRC_RING_TO_DESC(src_ring->shadow_base, write_index); + + desc_flags |= SM(transfer_id, CE_DESC_FLAGS_META_DATA); + +@@ -303,11 +302,11 @@ int ath10k_ce_send_nolock(struct ath10k_ + if (flags & CE_SEND_FLAG_BYTE_SWAP) + desc_flags |= CE_DESC_FLAGS_BYTE_SWAP; + +- sdesc->addr = __cpu_to_le32(buffer); +- sdesc->nbytes = __cpu_to_le16(nbytes); +- sdesc->flags = __cpu_to_le16(desc_flags); ++ sdesc.addr = __cpu_to_le32(buffer); ++ sdesc.nbytes = __cpu_to_le16(nbytes); ++ sdesc.flags = __cpu_to_le16(desc_flags); + +- *desc = *sdesc; ++ *desc = sdesc; + + src_ring->per_transfer_context[write_index] = per_transfer_context; + +@@ -614,7 +613,7 @@ int ath10k_ce_completed_send_next_nolock + if (read_index == sw_index) + return -EIO; + +- sbase = src_ring->shadow_base; ++ sbase = src_ring->base_addr_owner_space; + sdesc = CE_SRC_RING_TO_DESC(sbase, sw_index); + + /* Return data from completed source descriptor */ |