drivers/net/ethernet/intel/e1000e/82571.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/intel/e1000e/82571.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/intel/e1000e/82571.c
Extension
.c
Size
54807 bytes
Lines
2049
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 (((eecd >> 15) & 0x3) == 0x3) {
			nvm->type = e1000_nvm_flash_hw;
			nvm->word_size = 2048;
			/* Autonomous Flash update bit must be cleared due
			 * to Flash update issue.
			 */
			eecd &= ~E1000_EECD_AUPDEN;
			ew32(EECD, eecd);
			break;
		}
		fallthrough;
	default:
		nvm->type = e1000_nvm_eeprom_spi;
		size = (u16)FIELD_GET(E1000_EECD_SIZE_EX_MASK, eecd);
		/* Added to a constant, "size" becomes the left-shift value
		 * for setting word_size.
		 */
		size += NVM_WORD_SIZE_BASE_SHIFT;

		/* EEPROM access above 16k is unsupported */
		if (size > 14)
			size = 14;
		nvm->word_size = BIT(size);
		break;
	}

	/* Function Pointers */
	switch (hw->mac.type) {
	case e1000_82574:
	case e1000_82583:
		nvm->ops.acquire = e1000_get_hw_semaphore_82574;
		nvm->ops.release = e1000_put_hw_semaphore_82574;
		break;
	default:
		break;
	}

	return 0;
}

/**
 *  e1000_init_mac_params_82571 - Init MAC func ptrs.
 *  @hw: pointer to the HW structure
 **/
static s32 e1000_init_mac_params_82571(struct e1000_hw *hw)
{
	struct e1000_mac_info *mac = &hw->mac;
	u32 swsm = 0;
	u32 swsm2 = 0;
	bool force_clear_smbi = false;

	/* Set media type and media-dependent function pointers */
	switch (hw->adapter->pdev->device) {
	case E1000_DEV_ID_82571EB_FIBER:
	case E1000_DEV_ID_82572EI_FIBER:
	case E1000_DEV_ID_82571EB_QUAD_FIBER:
		hw->phy.media_type = e1000_media_type_fiber;
		mac->ops.setup_physical_interface =
		    e1000_setup_fiber_serdes_link_82571;
		mac->ops.check_for_link = e1000e_check_for_fiber_link;
		mac->ops.get_link_up_info =
		    e1000e_get_speed_and_duplex_fiber_serdes;
		break;
	case E1000_DEV_ID_82571EB_SERDES:
	case E1000_DEV_ID_82571EB_SERDES_DUAL:
	case E1000_DEV_ID_82571EB_SERDES_QUAD:
	case E1000_DEV_ID_82572EI_SERDES:
		hw->phy.media_type = e1000_media_type_internal_serdes;
		mac->ops.setup_physical_interface =
		    e1000_setup_fiber_serdes_link_82571;
		mac->ops.check_for_link = e1000_check_for_serdes_link_82571;
		mac->ops.get_link_up_info =
		    e1000e_get_speed_and_duplex_fiber_serdes;
		break;
	default:
		hw->phy.media_type = e1000_media_type_copper;
		mac->ops.setup_physical_interface =
		    e1000_setup_copper_link_82571;
		mac->ops.check_for_link = e1000e_check_for_copper_link;
		mac->ops.get_link_up_info = e1000e_get_speed_and_duplex_copper;
		break;
	}

	/* Set mta register count */
	mac->mta_reg_count = 128;
	/* Set rar entry count */
	mac->rar_entry_count = E1000_RAR_ENTRIES;
	/* Adaptive IFS supported */
	mac->adaptive_ifs = true;

Annotation

Implementation Notes