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