[PATCH net-next 06/10] net: stmmac: xgmac: support per-channel irq

Jisheng Zhang
2023-07-23T16:23:02Z

The IP supports per channel interrupt, add support for this usage case.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
.../net/ethernet/stmicro/stmmac/dwxgmac2.h | 2 ++
.../ethernet/stmicro/stmmac/dwxgmac2_dma.c | 33 +++++++++++--------
2 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
index 81cbb13a101d..12e1228ccf2a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
@@ -327,6 +327,8 @@

/* DMA Registers */
#define XGMAC_DMA_MODE 0x00003000
+#define XGMAC_INTM GENMASK(13, 12)
+#define XGMAC_INTM_MODE1 0x1
#define XGMAC_SWR BIT(0)
#define XGMAC_DMA_SYSBUS_MODE 0x00003004
#define XGMAC_WR_OSR_LMT GENMASK(29, 24)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
index b5ba4e0cca55..ef25af92d6cc 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
@@ -31,6 +31,13 @@ static void dwxgmac2_dma_init(void __iomem *ioaddr,
value |= XGMAC_EAME;

writel(value, ioaddr + XGMAC_DMA_SYSBUS_MODE);
+
+ if (dma_cfg->perch_irq_en) {
+ value = readl(ioaddr + XGMAC_DMA_MODE);
+ value &= ~XGMAC_INTM;
+ value |= FIELD_PREP(XGMAC_INTM, XGMAC_INTM_MODE1);
+ writel(value, ioaddr + XGMAC_DMA_MODE);
+ }
}

static void dwxgmac2_dma_init_chan(struct stmmac_priv *priv,
@@ -365,20 +372,20 @@ static int dwxgmac2_dma_interrupt(struct stmmac_priv *priv,
}

/* TX/RX NORMAL interrupts */
- if (likely(intr_status & XGMAC_NIS)) {
- if (likely(intr_status & XGMAC_RI)) {
- u64_stats_update_begin(&rx_q->rxq_stats.syncp);
- rx_q->rxq_stats.rx_normal_irq_n++;
- u64_stats_update_end(&rx_q->rxq_stats.syncp);
- ret |= handle_rx;
- }
- if (likely(intr_status & (XGMAC_TI | XGMAC_TBU))) {
- u64_stats_update_begin(&tx_q->txq_stats.syncp);
- tx_q->txq_stats.tx_normal_irq_n++;
- u64_stats_update_end(&tx_q->txq_stats.syncp);
- ret |= handle_tx;
- }
+ if (likely(intr_status & XGMAC_RI)) {
+ u64_stats_update_begin(&rx_q->rxq_stats.syncp);
+ rx_q->rxq_stats.rx_normal_irq_n++;
+ u64_stats_update_end(&rx_q->rxq_stats.syncp);
+ ret |= handle_rx;
+ }
+ if (likely(intr_status & XGMAC_TI)) {
+ u64_stats_update_begin(&tx_q->txq_stats.syncp);
+ tx_q->txq_stats.tx_normal_irq_n++;
+ u64_stats_update_end(&tx_q->txq_stats.syncp);
+ ret |= handle_tx;
}
+ if (unlikely(intr_status & XGMAC_TBU))
+ ret |= handle_tx;

/* Clear interrupts */
writel(intr_en & intr_status, ioaddr + XGMAC_DMA_CH_STATUS(chan));
--
2.40.1