drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
Extension
.c
Size
118715 bytes
Lines
4226
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) {
			hw_err(hw, "semaphore failed with %d\n", status);
			msleep(IXGBE_CS4227_CHECK_DELAY);
			continue;
		}

		/* Get status of reset flow. */
		status = ixgbe_read_cs4227(hw, IXGBE_CS4227_SCRATCH, &value);
		if (!status && value == IXGBE_CS4227_RESET_COMPLETE)
			goto out;

		if (status || value != IXGBE_CS4227_RESET_PENDING)
			break;

		/* Reset is pending. Wait and check again. */
		hw->mac.ops.release_swfw_sync(hw, swfw_mask);
		msleep(IXGBE_CS4227_CHECK_DELAY);
	}
	/* If still pending, assume other instance failed. */
	if (retry == IXGBE_CS4227_RETRIES) {
		status = hw->mac.ops.acquire_swfw_sync(hw, swfw_mask);
		if (status) {
			hw_err(hw, "semaphore failed with %d\n", status);
			return;
		}
	}

	/* Reset the CS4227. */
	status = ixgbe_reset_cs4227(hw);
	if (status) {
		hw_err(hw, "CS4227 reset failed: %d", status);
		goto out;
	}

	/* Reset takes so long, temporarily release semaphore in case the
	 * other driver instance is waiting for the reset indication.
	 */
	ixgbe_write_cs4227(hw, IXGBE_CS4227_SCRATCH,
			   IXGBE_CS4227_RESET_PENDING);
	hw->mac.ops.release_swfw_sync(hw, swfw_mask);
	usleep_range(10000, 12000);
	status = hw->mac.ops.acquire_swfw_sync(hw, swfw_mask);
	if (status) {
		hw_err(hw, "semaphore failed with %d", status);
		return;
	}

	/* Record completion for next time. */
	status = ixgbe_write_cs4227(hw, IXGBE_CS4227_SCRATCH,
				    IXGBE_CS4227_RESET_COMPLETE);

out:
	hw->mac.ops.release_swfw_sync(hw, swfw_mask);
	msleep(hw->eeprom.semaphore_delay);
}

/** ixgbe_identify_phy_x550em - Get PHY type based on device id
 *  @hw: pointer to hardware structure
 *
 *  Returns error code
 */
static int ixgbe_identify_phy_x550em(struct ixgbe_hw *hw)
{
	switch (hw->device_id) {
	case IXGBE_DEV_ID_X550EM_A_SFP:
		if (hw->bus.lan_id)
			hw->phy.phy_semaphore_mask = IXGBE_GSSR_PHY1_SM;
		else
			hw->phy.phy_semaphore_mask = IXGBE_GSSR_PHY0_SM;
		return ixgbe_identify_module_generic(hw);
	case IXGBE_DEV_ID_X550EM_X_SFP:
		/* set up for CS4227 usage */
		hw->phy.phy_semaphore_mask = IXGBE_GSSR_SHARED_I2C_SM;
		ixgbe_setup_mux_ctl(hw);
		ixgbe_check_cs4227(hw);
		fallthrough;
	case IXGBE_DEV_ID_X550EM_A_SFP_N:
		return ixgbe_identify_module_generic(hw);
	case IXGBE_DEV_ID_X550EM_X_KX4:
		hw->phy.type = ixgbe_phy_x550em_kx4;
		break;
	case IXGBE_DEV_ID_X550EM_X_XFI:
		hw->phy.type = ixgbe_phy_x550em_xfi;
		break;
	case IXGBE_DEV_ID_X550EM_X_KR:
	case IXGBE_DEV_ID_X550EM_A_KR:
	case IXGBE_DEV_ID_X550EM_A_KR_L:
		hw->phy.type = ixgbe_phy_x550em_kr;
		break;
	case IXGBE_DEV_ID_X550EM_A_10G_T:

Annotation

Implementation Notes