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// SPDX-License-Identifier: GPL-2.0+
// Copyright (c) 2024 Hisilicon Limited.
#include <linux/interrupt.h>
#include "hbg_irq.h"
#include "hbg_hw.h"
static void hbg_irq_handle_err(struct hbg_priv *priv,
const struct hbg_irq_info *irq_info)
{
if (irq_info->need_print)
dev_err(&priv->pdev->dev,
"receive error interrupt: %s\n", irq_info->name);
if (irq_info->need_reset)
hbg_err_reset_task_schedule(priv);
}
static void hbg_irq_handle_tx(struct hbg_priv *priv,
const struct hbg_irq_info *irq_info)
{
napi_schedule(&priv->tx_ring.napi);
}
static void hbg_irq_handle_rx(struct hbg_priv *priv,
const struct hbg_irq_info *irq_info)
{
napi_schedule(&priv->rx_ring.napi);
}
static void hbg_irq_handle_rx_buf_val(struct hbg_priv *priv,
const struct hbg_irq_info *irq_info)
{
priv->stats.rx_fifo_less_empty_thrsld_cnt++;
}
#define HBG_IRQ_I(name, handle) \
{#name, HBG_INT_MSK_##name##_B, false, false, false, handle}
#define HBG_ERR_IRQ_I(name, need_print, ndde_reset) \
{#name, HBG_INT_MSK_##name##_B, true, need_print, \
ndde_reset, hbg_irq_handle_err}
static const struct hbg_irq_info hbg_irqs[] = {
HBG_IRQ_I(RX, hbg_irq_handle_rx),
HBG_IRQ_I(TX, hbg_irq_handle_tx),
HBG_ERR_IRQ_I(TX_PKT_CPL, true, true),
HBG_ERR_IRQ_I(MAC_MII_FIFO_ERR, true, true),
HBG_ERR_IRQ_I(MAC_PCS_RX_FIFO_ERR, true, true),
HBG_ERR_IRQ_I(MAC_PCS_TX_FIFO_ERR, true, true),
HBG_ERR_IRQ_I(MAC_APP_RX_FIFO_ERR, true, true),
HBG_ERR_IRQ_I(MAC_APP_TX_FIFO_ERR, true, true),
HBG_ERR_IRQ_I(SRAM_PARITY_ERR, true, false),
HBG_ERR_IRQ_I(TX_AHB_ERR, true, true),
HBG_IRQ_I(RX_BUF_AVL, hbg_irq_handle_rx_buf_val),
HBG_ERR_IRQ_I(REL_BUF_ERR, true, false),
HBG_ERR_IRQ_I(TXCFG_AVL, false, false),
HBG_ERR_IRQ_I(TX_DROP, false, false),
HBG_ERR_IRQ_I(RX_DROP, false, false),
HBG_ERR_IRQ_I(RX_AHB_ERR, true, false),
HBG_ERR_IRQ_I(MAC_FIFO_ERR, true, true),
HBG_ERR_IRQ_I(RBREQ_ERR, true, true),
HBG_ERR_IRQ_I(WE_ERR, true, true),
};
static irqreturn_t hbg_irq_handle(int irq_num, void *p)
{
const struct hbg_irq_info *info;
struct hbg_priv *priv = p;
u32 status;
u32 i;
status = hbg_hw_get_irq_status(priv);
for (i = 0; i < priv->vectors.info_array_len; i++) {
info = &priv->vectors.info_array[i];
if (status & info->mask) {
if (!hbg_hw_irq_is_enabled(priv, info->mask))
continue;
hbg_hw_irq_enable(priv, info->mask, false);
hbg_hw_irq_clear(priv, info->mask);
priv->vectors.stats_array[i]++;
if (info->irq_handle)
info->irq_handle(priv, info);
if (info->re_enable)
hbg_hw_irq_enable(priv, info->mask, true);
}
}
return IRQ_HANDLED;
}
static const char *irq_names_map[HBG_VECTOR_NUM] = { "tx", "rx",
"err", "mdio" };
int hbg_irq_init(struct hbg_priv *priv)
{
struct hbg_vector *vectors = &priv->vectors;
struct device *dev = &priv->pdev->dev;
int ret, id;
u32 i;
/* used pcim_enable_device(), so the vectors become device managed */
ret = pci_alloc_irq_vectors(priv->pdev, HBG_VECTOR_NUM, HBG_VECTOR_NUM,
PCI_IRQ_MSI | PCI_IRQ_MSIX);
if (ret < 0)
return dev_err_probe(dev, ret, "failed to allocate vectors\n");
if (ret != HBG_VECTOR_NUM)
return dev_err_probe(dev, -EINVAL,
"requested %u MSI, but allocated %d MSI\n",
HBG_VECTOR_NUM, ret);
/* mdio irq not requested, so the number of requested interrupts
* is HBG_VECTOR_NUM - 1.
*/
for (i = 0; i < HBG_VECTOR_NUM - 1; i++) {
id = pci_irq_vector(priv->pdev, i);
if (id < 0)
return dev_err_probe(dev, id, "failed to get irq id\n");
snprintf(vectors->name[i], sizeof(vectors->name[i]), "%s-%s-%s",
dev_driver_string(dev), pci_name(priv->pdev),
irq_names_map[i]);
ret = devm_request_irq(dev, id, hbg_irq_handle, 0,
vectors->name[i], priv);
if (ret)
return dev_err_probe(dev, ret,
"failed to request irq: %s\n",
irq_names_map[i]);
}
vectors->stats_array = devm_kcalloc(&priv->pdev->dev,
ARRAY_SIZE(hbg_irqs),
sizeof(u64), GFP_KERNEL);
if (!vectors->stats_array)
return -ENOMEM;
vectors->info_array = hbg_irqs;
vectors->info_array_len = ARRAY_SIZE(hbg_irqs);
return 0;
}
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