drivers/net/ethernet/intel/ice/devlink/port.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/intel/ice/devlink/port.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/intel/ice/devlink/port.c
Extension
.c
Size
27189 bytes
Lines
1002
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 (status) {
			dev_dbg(dev, "Couldn't read port option for port %d, err %d\n",
				i, status);
			goto err;
		}
	}

	dev_dbg(dev, "Available port split options and max port speeds (Gbps):\n");
	dev_dbg(dev, "Status  Split      Quad 0          Quad 1\n");
	dev_dbg(dev, "        count  L0  L1  L2  L3  L4  L5  L6  L7\n");

	for (i = 0; i < options_count; i++) {
		cnt = 0;

		if (i == ice_active_port_option)
			str = "Active";
		else if ((i == pending_idx) && pending_valid)
			str = "Pending";
		else
			str = "";

		cnt += snprintf(&desc[cnt], ICE_PORT_OPT_DESC_LEN - cnt,
				"%-8s", str);

		cnt += snprintf(&desc[cnt], ICE_PORT_OPT_DESC_LEN - cnt,
				"%-6u", options[i].pmd);

		for (j = 0; j < ICE_MAX_PORT_PER_PCI_DEV; ++j) {
			speed = options[i + j * ICE_AQC_PORT_OPT_MAX].max_lane_speed;
			str = ice_devlink_port_opt_speed_str(speed);
			cnt += snprintf(&desc[cnt], ICE_PORT_OPT_DESC_LEN - cnt,
					"%3s ", str);
		}

		dev_dbg(dev, "%s\n", desc);
	}

err:
	kfree(options);
}

/**
 * ice_devlink_aq_set_port_option - Send set port option admin queue command
 * @pf: the PF to print split port options
 * @option_idx: selected port option
 * @extack: extended netdev ack structure
 *
 * Sends set port option admin queue command with selected port option and
 * calls NVM write activate.
 */
static int
ice_devlink_aq_set_port_option(struct ice_pf *pf, u8 option_idx,
			       struct netlink_ext_ack *extack)
{
	struct device *dev = ice_pf_to_dev(pf);
	int status;

	status = ice_aq_set_port_option(&pf->hw, 0, true, option_idx);
	if (status) {
		dev_dbg(dev, "ice_aq_set_port_option, err %d aq_err %d\n",
			status, pf->hw.adminq.sq_last_status);
		NL_SET_ERR_MSG_MOD(extack, "Port split request failed");
		return -EIO;
	}

	status = ice_acquire_nvm(&pf->hw, ICE_RES_WRITE);
	if (status) {
		dev_dbg(dev, "ice_acquire_nvm failed, err %d aq_err %d\n",
			status, pf->hw.adminq.sq_last_status);
		NL_SET_ERR_MSG_MOD(extack, "Failed to acquire NVM semaphore");
		return -EIO;
	}

	status = ice_nvm_write_activate(&pf->hw, ICE_AQC_NVM_ACTIV_REQ_EMPR, NULL);
	if (status) {
		dev_dbg(dev, "ice_nvm_write_activate failed, err %d aq_err %d\n",
			status, pf->hw.adminq.sq_last_status);
		NL_SET_ERR_MSG_MOD(extack, "Port split request failed to save data");
		ice_release_nvm(&pf->hw);
		return -EIO;
	}

	ice_release_nvm(&pf->hw);

	NL_SET_ERR_MSG_MOD(extack, "Reboot required to finish port split");
	return 0;
}

/**
 * ice_devlink_port_split - .port_split devlink handler

Annotation

Implementation Notes