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rtase: Implement the rtase_down function

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Implement the rtase_down function to disable hardware setting
and interrupt and clear descriptor ring.

Signed-off-by: Justin Lai <justinlai0215@realtek.com>
Link: https://patch.msgid.link/20240904032114.247117-4-justinlai0215@realtek.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Justin Lai 2024-09-04 11:21:04 +08:00 committed by Jakub Kicinski
parent ea244d7d8d
commit 5a2a2f1524
1 changed files with 150 additions and 0 deletions
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150
drivers/net/ethernet/realtek/rtase/rtase_main.c
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@ -192,6 +192,56 @@ err_out:
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;
@ -410,6 +460,80 @@ 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);
@ -513,6 +637,32 @@ err_free_all_allocated_mem:
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);