drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
Extension
.c
Size
14078 bytes
Lines
539
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 (ACPI_FAILURE(status)) {
			acpi_evaluate_object(ACPI_HANDLE(&pdata->pdev->dev),
					     "_INI", NULL, NULL);
		}
#endif
	}

	xgene_enet_ecc_init(pdata);
	xgene_enet_config_ring_if_assoc(pdata);

	return 0;
}

static void xgene_enet_xgcle_bypass(struct xgene_enet_pdata *pdata,
				    u32 dst_ring_num, u16 bufpool_id,
				    u16 nxtbufpool_id)
{
	u32 cb, fpsel, nxtfpsel;

	xgene_enet_rd_csr(pdata, XCLE_BYPASS_REG0_ADDR, &cb);
	cb |= CFG_CLE_BYPASS_EN0;
	CFG_CLE_IP_PROTOCOL0_SET(&cb, 3);
	xgene_enet_wr_csr(pdata, XCLE_BYPASS_REG0_ADDR, cb);

	fpsel = xgene_enet_get_fpsel(bufpool_id);
	nxtfpsel = xgene_enet_get_fpsel(nxtbufpool_id);
	xgene_enet_rd_csr(pdata, XCLE_BYPASS_REG1_ADDR, &cb);
	CFG_CLE_DSTQID0_SET(&cb, dst_ring_num);
	CFG_CLE_FPSEL0_SET(&cb, fpsel);
	CFG_CLE_NXTFPSEL0_SET(&cb, nxtfpsel);
	xgene_enet_wr_csr(pdata, XCLE_BYPASS_REG1_ADDR, cb);
	pr_info("+ cle_bypass: fpsel: %d nxtfpsel: %d\n", fpsel, nxtfpsel);
}

static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
{
	struct device *dev = &pdata->pdev->dev;

	if (dev->of_node) {
		if (!IS_ERR(pdata->clk))
			clk_disable_unprepare(pdata->clk);
	}
}

static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
			     struct xgene_enet_desc_ring *ring)
{
	u32 addr, data;

	if (xgene_enet_is_bufpool(ring->id)) {
		addr = ENET_CFGSSQMIFPRESET_ADDR;
		data = BIT(xgene_enet_get_fpsel(ring->id));
	} else {
		addr = ENET_CFGSSQMIWQRESET_ADDR;
		data = BIT(xgene_enet_ring_bufnum(ring->id));
	}

	xgene_enet_wr_ring_if(pdata, addr, data);
}

static int xgene_enet_gpio_lookup(struct xgene_enet_pdata *pdata)
{
	struct device *dev = &pdata->pdev->dev;

	pdata->sfp_rdy = gpiod_get(dev, "rxlos", GPIOD_IN);
	if (IS_ERR(pdata->sfp_rdy))
		pdata->sfp_rdy = gpiod_get(dev, "sfp", GPIOD_IN);

	if (IS_ERR(pdata->sfp_rdy))
		return -ENODEV;

	return 0;
}

static void xgene_enet_link_state(struct work_struct *work)
{
	struct xgene_enet_pdata *pdata = container_of(to_delayed_work(work),
					 struct xgene_enet_pdata, link_work);
	struct net_device *ndev = pdata->ndev;
	u32 link_status, poll_interval;

	link_status = xgene_enet_link_status(pdata);
	if (pdata->sfp_gpio_en && link_status &&
	    (!IS_ERR(pdata->sfp_rdy) || !xgene_enet_gpio_lookup(pdata)) &&
	    !gpiod_get_value(pdata->sfp_rdy))
		link_status = 0;

	if (link_status) {
		if (!netif_carrier_ok(ndev)) {
			netif_carrier_on(ndev);

Annotation

Implementation Notes