recipes-kernel/linux/linux-mediatek-5.4/mediatek/wed3/999-3021-mtk-wed-add-dma-mask-limitation-and-GFP_DMA32-for-bo.patch

From 659d8d088ee856cbc7598a26a307fd3e20a70e8e Mon Sep 17 00:00:00 2001
From: Sujuan Chen <sujuan.chen@mediatek.com>
Date: Mon, 18 Sep 2023 13:23:56 +0800
Subject: [PATCH 22/22] mtk: wed: add dma mask limitation and GFP_DMA32 for
 board >= 4GB dram

---
 drivers/net/ethernet/mediatek/mtk_wed.c     | 8 ++++++--
 drivers/net/ethernet/mediatek/mtk_wed_mcu.c | 4 ++--
 drivers/net/ethernet/mediatek/mtk_wed_wo.c  | 4 ++--
 drivers/net/ethernet/mediatek/mtk_wed_wo.h  | 1 +
 4 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index 0d101d5..2ec7148 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -472,7 +472,7 @@ mtk_wed_tx_buffer_alloc(struct mtk_wed_device *dev)
 		void *buf;
 		int s;
 
-		page = __dev_alloc_pages(GFP_KERNEL, 0);
+		page = __dev_alloc_pages(GFP_KERNEL | GFP_DMA32, 0);
 		if (!page)
 			return -ENOMEM;
 
@@ -636,7 +636,7 @@ mtk_wed_rx_page_buffer_alloc(struct mtk_wed_device *dev)
 		void *buf;
 		int s;
 
-		page = __dev_alloc_pages(GFP_KERNEL, 0);
+		page = __dev_alloc_pages(GFP_KERNEL | GFP_DMA32, 0);
 		if (!page)
 			return -ENOMEM;
 
@@ -2249,6 +2249,10 @@ mtk_wed_attach(struct mtk_wed_device *dev)
 	dev->wdma_idx = hw->index;
 	dev->ver = hw->version;
 
+	ret = dma_set_mask_and_coherent(hw->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
 	if (dev->hw->version == 3)
 		dev->hw->pci_base = mtk_wed_get_pci_base(dev);
 
diff --git a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
index 055594d..4ed1548 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
@@ -131,7 +131,7 @@ int mtk_wed_exception_init(struct mtk_wed_wo *wo)
 	}req;
 
 	exp->log_size = EXCEPTION_LOG_SIZE;
-	exp->log = kmalloc(exp->log_size, GFP_ATOMIC);
+	exp->log = page_frag_alloc(&wo->page, exp->log_size, GFP_ATOMIC | GFP_DMA32);
 	if (!exp->log)
 		return -ENOMEM;
 
@@ -151,7 +151,7 @@ int mtk_wed_exception_init(struct mtk_wed_wo *wo)
 				    &req, sizeof(req), false);
 
 free:
-	kfree(exp->log);
+	skb_free_frag(exp->log);
 	return -ENOMEM;
 }
 
diff --git a/drivers/net/ethernet/mediatek/mtk_wed_wo.c b/drivers/net/ethernet/mediatek/mtk_wed_wo.c
index 54b7787..e991d20 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed_wo.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.c
@@ -88,7 +88,7 @@ woif_q_rx_fill(struct mtk_wed_wo *wo, struct wed_wo_queue *q, bool rx)
 		page = &q->rx_page;
 
 	while (q->queued < q->ndesc) {
-		buf = page_frag_alloc(page, len, GFP_ATOMIC);
+		buf = page_frag_alloc(page, len, GFP_ATOMIC | GFP_DMA32);
 		if (!buf)
 			break;
 
@@ -555,7 +555,7 @@ void mtk_wed_wo_exit(struct mtk_wed_hw *hw)
 
 	if (wo->exp.log) {
 		dma_unmap_single(wo->hw->dev, wo->exp.phys, wo->exp.log_size, DMA_FROM_DEVICE);
-		kfree(wo->exp.log);
+		skb_free_frag(wo->exp.log);
 	}
 
 	wo->hw = NULL;
diff --git a/drivers/net/ethernet/mediatek/mtk_wed_wo.h b/drivers/net/ethernet/mediatek/mtk_wed_wo.h
index 548b38e..3fd1f3f 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed_wo.h
+++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.h
@@ -193,6 +193,7 @@ struct mtk_wed_wo {
 	const struct wed_wo_drv_ops *drv_ops;
 	const struct wed_wo_mcu_ops *mcu_ops;
 	const struct wed_wo_queue_ops *queue_ops;
+	struct page_frag_cache page;
 
 	struct net_device napi_dev;
 	spinlock_t rx_lock;
-- 
2.18.0