drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
Extension
.c
Size
3822 bytes
Lines
126
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (csr8 & DMA_MISSED_FRAME_OVE) {
			x->rx_overflow_cntr += 0x800;
		} else {
			unsigned int ove_cntr;
			ove_cntr = ((csr8 & DMA_MISSED_FRAME_OVE_CNTR) >> 17);
			x->rx_overflow_cntr += ove_cntr;
		}

		if (csr8 & DMA_MISSED_FRAME_OVE_M) {
			x->rx_missed_cntr += 0xffff;
		} else {
			unsigned int miss_f = (csr8 & DMA_MISSED_FRAME_M_CNTR);
			x->rx_missed_cntr += miss_f;
		}
	}
}

const struct stmmac_dma_ops dwmac100_dma_ops = {
	.reset = dwmac_dma_reset,
	.init = dwmac100_dma_init,
	.init_rx_chan = dwmac100_dma_init_rx,
	.init_tx_chan = dwmac100_dma_init_tx,
	.dump_regs = dwmac100_dump_dma_regs,
	.dma_tx_mode = dwmac100_dma_operation_mode_tx,
	.dma_diagnostic_fr = dwmac100_dma_diagnostic_fr,
	.enable_dma_transmission = dwmac_enable_dma_transmission,
	.enable_dma_irq = dwmac_enable_dma_irq,
	.disable_dma_irq = dwmac_disable_dma_irq,
	.start_tx = dwmac_dma_start_tx,
	.stop_tx = dwmac_dma_stop_tx,
	.start_rx = dwmac_dma_start_rx,
	.stop_rx = dwmac_dma_stop_rx,
	.dma_interrupt = dwmac_dma_interrupt,
};

Annotation

Implementation Notes