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Message-ID: <20240807033723.485207-4-justinlai0215@realtek.com>
Date: Wed, 7 Aug 2024 11:37:13 +0800
From: Justin Lai <justinlai0215@...ltek.com>
To: <kuba@...nel.org>
CC: <davem@...emloft.net>, <edumazet@...gle.com>, <pabeni@...hat.com>,
<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
<andrew@...n.ch>, <jiri@...nulli.us>, <horms@...nel.org>,
<rkannoth@...vell.com>, <jdamato@...tly.com>, <pkshih@...ltek.com>,
<larry.chiu@...ltek.com>, "Justin
Lai" <justinlai0215@...ltek.com>
Subject: [PATCH net-next v26 03/13] rtase: Implement the rtase_down function
Implement the rtase_down function to disable hardware setting
and interrupt and clear descriptor ring.
Signed-off-by: Justin Lai <justinlai0215@...ltek.com>
---
.../net/ethernet/realtek/rtase/rtase_main.c | 150 ++++++++++++++++++
1 file changed, 150 insertions(+)
diff --git a/drivers/net/ethernet/realtek/rtase/rtase_main.c b/drivers/net/ethernet/realtek/rtase/rtase_main.c
index 091e445b5deb..da795570e9ac 100644
--- a/drivers/net/ethernet/realtek/rtase/rtase_main.c
+++ b/drivers/net/ethernet/realtek/rtase/rtase_main.c
@@ -192,6 +192,56 @@ static int rtase_alloc_desc(struct rtase_private *tp)
return -ENOMEM;
}
+static void rtase_unmap_tx_skb(struct pci_dev *pdev, u32 len,
+ struct rtase_tx_desc *desc)
+{
+ dma_unmap_single(&pdev->dev, le64_to_cpu(desc->addr), len,
+ DMA_TO_DEVICE);
+ desc->opts1 = cpu_to_le32(RTK_OPTS1_DEBUG_VALUE);
+ desc->opts2 = 0x00;
+ desc->addr = cpu_to_le64(RTK_MAGIC_NUMBER);
+}
+
+static void rtase_tx_clear_range(struct rtase_ring *ring, u32 start, u32 n)
+{
+ struct rtase_tx_desc *desc_base = ring->desc;
+ struct rtase_private *tp = ring->ivec->tp;
+ u32 i;
+
+ for (i = 0; i < n; i++) {
+ u32 entry = (start + i) % RTASE_NUM_DESC;
+ struct rtase_tx_desc *desc = desc_base + entry;
+ u32 len = ring->mis.len[entry];
+ struct sk_buff *skb;
+
+ if (len == 0)
+ continue;
+
+ rtase_unmap_tx_skb(tp->pdev, len, desc);
+ ring->mis.len[entry] = 0;
+ skb = ring->skbuff[entry];
+ if (!skb)
+ continue;
+
+ tp->stats.tx_dropped++;
+ dev_kfree_skb_any(skb);
+ ring->skbuff[entry] = NULL;
+ }
+}
+
+static void rtase_tx_clear(struct rtase_private *tp)
+{
+ struct rtase_ring *ring;
+ u16 i;
+
+ for (i = 0; i < tp->func_tx_queue_num; i++) {
+ ring = &tp->tx_ring[i];
+ rtase_tx_clear_range(ring, ring->dirty_idx, RTASE_NUM_DESC);
+ ring->cur_idx = 0;
+ ring->dirty_idx = 0;
+ }
+}
+
static void rtase_mark_to_asic(union rtase_rx_desc *desc, u32 rx_buf_sz)
{
u32 eor = le32_to_cpu(desc->desc_cmd.opts1) & RTASE_RING_END;
@@ -408,6 +458,80 @@ static void rtase_tally_counter_clear(const struct rtase_private *tp)
rtase_w32(tp, RTASE_DTCCR0, cmd | RTASE_COUNTER_RESET);
}
+static void rtase_irq_dis_and_clear(const struct rtase_private *tp)
+{
+ const struct rtase_int_vector *ivec = &tp->int_vector[0];
+ u32 val1;
+ u16 val2;
+ u8 i;
+
+ rtase_w32(tp, ivec->imr_addr, 0);
+ val1 = rtase_r32(tp, ivec->isr_addr);
+ rtase_w32(tp, ivec->isr_addr, val1);
+
+ for (i = 1; i < tp->int_nums; i++) {
+ ivec = &tp->int_vector[i];
+ rtase_w16(tp, ivec->imr_addr, 0);
+ val2 = rtase_r16(tp, ivec->isr_addr);
+ rtase_w16(tp, ivec->isr_addr, val2);
+ }
+}
+
+static void rtase_poll_timeout(const struct rtase_private *tp, u32 cond,
+ u32 sleep_us, u64 timeout_us, u16 reg)
+{
+ int err;
+ u8 val;
+
+ err = read_poll_timeout(rtase_r8, val, val & cond, sleep_us,
+ timeout_us, false, tp, reg);
+
+ if (err == -ETIMEDOUT)
+ netdev_err(tp->dev, "poll reg 0x00%x timeout\n", reg);
+}
+
+static void rtase_nic_reset(const struct net_device *dev)
+{
+ const struct rtase_private *tp = netdev_priv(dev);
+ u16 rx_config;
+ u8 val;
+
+ rx_config = rtase_r16(tp, RTASE_RX_CONFIG_0);
+ rtase_w16(tp, RTASE_RX_CONFIG_0, rx_config & ~RTASE_ACCEPT_MASK);
+
+ val = rtase_r8(tp, RTASE_MISC);
+ rtase_w8(tp, RTASE_MISC, val | RTASE_RX_DV_GATE_EN);
+
+ val = rtase_r8(tp, RTASE_CHIP_CMD);
+ rtase_w8(tp, RTASE_CHIP_CMD, val | RTASE_STOP_REQ);
+ mdelay(2);
+
+ rtase_poll_timeout(tp, RTASE_STOP_REQ_DONE, 100, 150000,
+ RTASE_CHIP_CMD);
+
+ rtase_poll_timeout(tp, RTASE_TX_FIFO_EMPTY, 100, 100000,
+ RTASE_FIFOR);
+
+ rtase_poll_timeout(tp, RTASE_RX_FIFO_EMPTY, 100, 100000,
+ RTASE_FIFOR);
+
+ val = rtase_r8(tp, RTASE_CHIP_CMD);
+ rtase_w8(tp, RTASE_CHIP_CMD, val & ~(RTASE_TE | RTASE_RE));
+ val = rtase_r8(tp, RTASE_CHIP_CMD);
+ rtase_w8(tp, RTASE_CHIP_CMD, val & ~RTASE_STOP_REQ);
+
+ rtase_w16(tp, RTASE_RX_CONFIG_0, rx_config);
+}
+
+static void rtase_hw_reset(const struct net_device *dev)
+{
+ const struct rtase_private *tp = netdev_priv(dev);
+
+ rtase_irq_dis_and_clear(tp);
+
+ rtase_nic_reset(dev);
+}
+
static void rtase_nic_enable(const struct net_device *dev)
{
const struct rtase_private *tp = netdev_priv(dev);
@@ -511,6 +635,32 @@ static int rtase_open(struct net_device *dev)
return ret;
}
+static void rtase_down(struct net_device *dev)
+{
+ struct rtase_private *tp = netdev_priv(dev);
+ struct rtase_int_vector *ivec;
+ struct rtase_ring *ring, *tmp;
+ u32 i;
+
+ for (i = 0; i < tp->int_nums; i++) {
+ ivec = &tp->int_vector[i];
+ napi_disable(&ivec->napi);
+ list_for_each_entry_safe(ring, tmp, &ivec->ring_list,
+ ring_entry)
+ list_del(&ring->ring_entry);
+ }
+
+ netif_tx_disable(dev);
+
+ netif_carrier_off(dev);
+
+ rtase_hw_reset(dev);
+
+ rtase_tx_clear(tp);
+
+ rtase_rx_clear(tp);
+}
+
static int rtase_close(struct net_device *dev)
{
struct rtase_private *tp = netdev_priv(dev);
--
2.34.1
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