From c06020d2384a5d5cd773bdd8a1975ebe12cb1135 Mon Sep 17 00:00:00 2001
From: Sujuan Chen <sujuan.chen@mediatek.com>
Date: Thu, 5 Jan 2023 16:43:57 +0800
Subject: [PATCH 3012/3012] wifi: mt76: connac: wed: add wed rx copy skb

Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
---
 dma.c         | 76 +++++++++++++++++++++++++++++++++++++++------------
 mt7915/mmio.c | 35 ++++++++++++++++++------
 2 files changed, 85 insertions(+), 26 deletions(-)

diff --git a/dma.c b/dma.c
index b210e39..4daa64d 100644
--- a/dma.c
+++ b/dma.c
@@ -208,11 +208,11 @@ mt76_dma_queue_reset(struct mt76_dev *dev, struct mt76_queue *q)
 
 static int
 mt76_dma_add_rx_buf(struct mt76_dev *dev, struct mt76_queue *q,
-		    struct mt76_queue_buf *buf, void *data)
+		    struct mt76_queue_buf *buf, void *data,
+		    struct mt76_rxwi_cache *rxwi)
 {
 	struct mt76_desc *desc = &q->desc[q->head];
 	struct mt76_queue_entry *entry = &q->entry[q->head];
-	struct mt76_rxwi_cache *rxwi = NULL;
 	u32 buf1 = 0, ctrl;
 	int idx = q->head;
 	int rx_token;
@@ -220,9 +220,11 @@ mt76_dma_add_rx_buf(struct mt76_dev *dev, struct mt76_queue *q,
 	ctrl = FIELD_PREP(MT_DMA_CTL_SD_LEN0, buf[0].len);
 
 	if (mt76_queue_is_wed_rx(q)) {
-		rxwi = mt76_get_rxwi(dev);
-		if (!rxwi)
-			return -ENOMEM;
+		if (!rxwi) {
+			rxwi = mt76_get_rxwi(dev);
+			if (!rxwi)
+				return -ENOMEM;
+		}
 
 		rx_token = mt76_rx_token_consume(dev, data, rxwi, buf->addr);
 		if (rx_token < 0) {
@@ -387,7 +389,7 @@ mt76_dma_tx_cleanup(struct mt76_dev *dev, struct mt76_queue *q, bool flush)
 
 static void *
 mt76_dma_get_buf(struct mt76_dev *dev, struct mt76_queue *q, int idx,
-		 int *len, u32 *info, bool *more, bool *drop)
+		 int *len, u32 *info, bool *more, bool *drop, bool flush)
 {
 	struct mt76_queue_entry *e = &q->entry[idx];
 	struct mt76_desc *desc = &q->desc[idx];
@@ -437,11 +439,43 @@ mt76_dma_get_buf(struct mt76_dev *dev, struct mt76_queue *q, int idx,
 				 SKB_WITH_OVERHEAD(q->buf_size),
 				 DMA_FROM_DEVICE);
 
-		buf = r->ptr;
-		r->dma_addr = 0;
-		r->ptr = NULL;
+		if (flush) {
+			buf = r->ptr;
+			r->dma_addr = 0;
+			r->ptr = NULL;
 
-		mt76_put_rxwi(dev, r);
+			mt76_put_rxwi(dev, r);
+		} else {
+			struct mt76_queue_buf qbuf;
+
+			buf = page_frag_alloc(&q->rx_page, q->buf_size, GFP_ATOMIC);
+			if (!buf)
+				return NULL;
+
+			memcpy(buf, r->ptr, SKB_WITH_OVERHEAD(q->buf_size));
+
+			r->dma_addr = dma_map_single(dev->dma_dev, r->ptr,
+						     SKB_WITH_OVERHEAD(q->buf_size),
+						     DMA_FROM_DEVICE);
+			if (unlikely(dma_mapping_error(dev->dma_dev, r->dma_addr))) {
+				skb_free_frag(r->ptr);
+				mt76_put_rxwi(dev, r);
+				return NULL;
+			}
+
+			qbuf.addr = r->dma_addr;
+			qbuf.len = SKB_WITH_OVERHEAD(q->buf_size);
+			qbuf.skip_unmap = false;
+
+			if (mt76_dma_add_rx_buf(dev, q, &qbuf, r->ptr, r) < 0) {
+				dma_unmap_single(dev->dma_dev, r->dma_addr,
+						 SKB_WITH_OVERHEAD(q->buf_size),
+						 DMA_FROM_DEVICE);
+				skb_free_frag(r->ptr);
+				mt76_put_rxwi(dev, r);
+				return NULL;
+			}
+		}
 
 		if (drop) {
 			u32 ctrl = le32_to_cpu(READ_ONCE(desc->ctrl));
@@ -480,7 +514,7 @@ mt76_dma_dequeue(struct mt76_dev *dev, struct mt76_queue *q, bool flush,
 	q->tail = (q->tail + 1) % q->ndesc;
 	q->queued--;
 
-	return mt76_dma_get_buf(dev, q, idx, len, info, more, drop);
+	return mt76_dma_get_buf(dev, q, idx, len, info, more, drop, flush);
 }
 
 static int
@@ -620,6 +654,7 @@ mt76_dma_rx_fill(struct mt76_dev *dev, struct mt76_queue *q)
 	int len = SKB_WITH_OVERHEAD(q->buf_size);
 	int frames = 0, offset = q->buf_offset;
 	dma_addr_t addr;
+	bool flags = false;
 
 	if (!q->ndesc)
 		return 0;
@@ -643,7 +678,7 @@ mt76_dma_rx_fill(struct mt76_dev *dev, struct mt76_queue *q)
 		qbuf.addr = addr + offset;
 		qbuf.len = len - offset;
 		qbuf.skip_unmap = false;
-		if (mt76_dma_add_rx_buf(dev, q, &qbuf, buf) < 0) {
+		if (mt76_dma_add_rx_buf(dev, q, &qbuf, buf, NULL) < 0) {
 			dma_unmap_single(dev->dma_dev, addr, len,
 					 DMA_FROM_DEVICE);
 			skb_free_frag(buf);
@@ -652,7 +687,10 @@ mt76_dma_rx_fill(struct mt76_dev *dev, struct mt76_queue *q)
 		frames++;
 	}
 
-	if (frames)
+	flags = (q->flags & MT_QFLAG_WED) &&
+		FIELD_GET(MT_QFLAG_WED_TYPE, q->flags) == MT76_WED_Q_RX;
+
+	if (frames || flags)
 		mt76_dma_kick_queue(dev, q);
 
 	spin_unlock_bh(&q->lock);
@@ -775,12 +813,14 @@ mt76_dma_rx_cleanup(struct mt76_dev *dev, struct mt76_queue *q)
 
 	spin_unlock_bh(&q->lock);
 
-	if (!q->rx_page.va)
-		return;
+	if (FIELD_GET(MT_QFLAG_WED_TYPE, q->flags) != MT76_WED_Q_RX) {
+		if (!q->rx_page.va)
+			return;
 
-	page = virt_to_page(q->rx_page.va);
-	__page_frag_cache_drain(page, q->rx_page.pagecnt_bias);
-	memset(&q->rx_page, 0, sizeof(q->rx_page));
+		page = virt_to_page(q->rx_page.va);
+		__page_frag_cache_drain(page, q->rx_page.pagecnt_bias);
+		memset(&q->rx_page, 0, sizeof(q->rx_page));
+	}
 }
 
 static void
diff --git a/mt7915/mmio.c b/mt7915/mmio.c
index bbaaa33..4113ab2 100644
--- a/mt7915/mmio.c
+++ b/mt7915/mmio.c
@@ -581,6 +581,7 @@ static void mt7915_mmio_wed_offload_disable(struct mtk_wed_device *wed)
 static void mt7915_mmio_wed_release_rx_buf(struct mtk_wed_device *wed)
 {
 	struct mt7915_dev *dev;
+	struct page *page;
 	u32 length;
 	int i;
 
@@ -597,13 +598,33 @@ static void mt7915_mmio_wed_release_rx_buf(struct mtk_wed_device *wed)
 
 		dma_unmap_single(dev->mt76.dma_dev, r->dma_addr,
 				 wed->wlan.rx_size, DMA_FROM_DEVICE);
-		__free_pages(virt_to_page(r->ptr), get_order(length));
+		skb_free_frag(r->ptr);
 		r->ptr = NULL;
 
 		mt76_put_rxwi(&dev->mt76, r);
 	}
 
 	mt76_free_pending_rxwi(&dev->mt76);
+
+	mt76_for_each_q_rx(&dev->mt76, i) {
+		struct mt76_queue *q = &dev->mt76.q_rx[i];
+
+		if (mt76_queue_is_wed_rx(q)) {
+			if (!q->rx_page.va)
+				continue;
+
+			page = virt_to_page(q->rx_page.va);
+			__page_frag_cache_drain(page, q->rx_page.pagecnt_bias);
+			memset(&q->rx_page, 0, sizeof(q->rx_page));
+		}
+	}
+
+	if (!wed->rx_buf_ring.rx_page.va)
+		return;
+
+	page = virt_to_page(wed->rx_buf_ring.rx_page.va);
+	__page_frag_cache_drain(page, wed->rx_buf_ring.rx_page.pagecnt_bias);
+	memset(&wed->rx_buf_ring.rx_page, 0, sizeof(wed->rx_buf_ring.rx_page));
 }
 
 static u32 mt7915_mmio_wed_init_rx_buf(struct mtk_wed_device *wed, int size)
@@ -620,35 +641,33 @@ static u32 mt7915_mmio_wed_init_rx_buf(struct mtk_wed_device *wed, int size)
 	for (i = 0; i < size; i++) {
 		struct mt76_rxwi_cache *r = mt76_get_rxwi(&dev->mt76);
 		dma_addr_t phy_addr;
-		struct page *page;
 		int token;
 		void *ptr;
 
 		if (!r)
 			goto unmap;
 
-		page = __dev_alloc_pages(GFP_KERNEL, get_order(length));
-		if (!page) {
+		ptr = page_frag_alloc(&wed->rx_buf_ring.rx_page, length, GFP_ATOMIC);
+		if (!ptr) {
 			mt76_put_rxwi(&dev->mt76, r);
 			goto unmap;
 		}
 
-		ptr = page_address(page);
 		phy_addr = dma_map_single(dev->mt76.dma_dev, ptr,
 					  wed->wlan.rx_size,
 					  DMA_TO_DEVICE);
+		
 		if (unlikely(dma_mapping_error(dev->mt76.dev, phy_addr))) {
-			__free_pages(page, get_order(length));
+			skb_free_frag(ptr);
 			mt76_put_rxwi(&dev->mt76, r);
 			goto unmap;
 		}
-
 		desc->buf0 = cpu_to_le32(phy_addr);
 		token = mt76_rx_token_consume(&dev->mt76, ptr, r, phy_addr);
 		if (token < 0) {
 			dma_unmap_single(dev->mt76.dma_dev, phy_addr,
 					 wed->wlan.rx_size, DMA_TO_DEVICE);
-			__free_pages(page, get_order(length));
+			skb_free_frag(ptr);
 			mt76_put_rxwi(&dev->mt76, r);
 			goto unmap;
 		}
-- 
2.18.0