1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright(c) 2007 - 2018 Intel Corporation. */
18 #include <linux/i2c-algo-bit.h>
119  * PTHRESH - MAC will consider prefetch if it has fewer than this number of
122  * HTHRESH - MAC will only prefetch if there are at least this many descriptors
125  * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
129 #define IGB_RX_PTHRESH	((hw->mac.type == e1000_i354) ? 12 : 8)
131 #define IGB_TX_PTHRESH	((hw->mac.type == e1000_i354) ? 20 : 8)
133 #define IGB_RX_WTHRESH	((hw->mac.type == e1000_82576 && \
134 			  (adapter->flags & IGB_FLAG_HAS_MSIX)) ? 1 : 4)
135 #define IGB_TX_WTHRESH	((hw->mac.type == e1000_82576 && \
136 			  (adapter->flags & IGB_FLAG_HAS_MSIX)) ? 1 : 16)
152  * use a 2K buffer for receives and need 1536/1534 to store the data for
162 #define IGB_MAX_FRAME_BUILD_SKB (IGB_RXBUFFER_1536 - NET_IP_ALIGN)
171 	pad_size = SKB_WITH_OVERHEAD(page_size) - rx_buf_len;  in igb_compute_pad()
185 	 * cache-line alignment.  in igb_skb_pad()
193 	rx_buf_len -= NET_IP_ALIGN;  in igb_skb_pad()
217 #define IGB_MNG_VLAN_NONE	-1
307 	struct igb_ring *ring;		/* pointer to linked list of rings */  member
312 	u8 itr;				/* current ITR setting for ring */
324 	void *desc;			/* descriptor ring memory */
325 	unsigned long flags;		/* ring specific flags */
326 	void __iomem *tail;		/* pointer to ring tail register */
327 	dma_addr_t dma;			/* phys address of the ring */
328 	unsigned int  size;		/* length of desc. ring in bytes */
330 	u16 count;			/* number of desc. in the ring */
331 	u8 queue_index;			/* logical index of the ring*/
332 	u8 reg_idx;			/* physical index of the ring */
378 	struct igb_ring ring[] ____cacheline_internodealigned_in_smp;  member
390 #define ring_uses_large_buffer(ring) \  argument
391 	test_bit(IGB_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
392 #define set_ring_uses_large_buffer(ring) \  argument
393 	set_bit(IGB_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
394 #define clear_ring_uses_large_buffer(ring) \  argument
395 	clear_bit(IGB_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
397 #define ring_uses_build_skb(ring) \  argument
398 	test_bit(IGB_RING_FLAG_RX_BUILD_SKB_ENABLED, &(ring)->flags)
399 #define set_ring_build_skb_enabled(ring) \  argument
400 	set_bit(IGB_RING_FLAG_RX_BUILD_SKB_ENABLED, &(ring)->flags)
401 #define clear_ring_build_skb_enabled(ring) \  argument
402 	clear_bit(IGB_RING_FLAG_RX_BUILD_SKB_ENABLED, &(ring)->flags)
404 static inline unsigned int igb_rx_bufsz(struct igb_ring *ring)  in igb_rx_bufsz()  argument
407 	if (ring_uses_large_buffer(ring))  in igb_rx_bufsz()
410 	if (ring_uses_build_skb(ring))  in igb_rx_bufsz()
416 static inline unsigned int igb_rx_pg_order(struct igb_ring *ring)  in igb_rx_pg_order()  argument
419 	if (ring_uses_large_buffer(ring))  in igb_rx_pg_order()
430 	(&(((union e1000_adv_rx_desc *)((R)->desc))[i]))
432 	(&(((union e1000_adv_tx_desc *)((R)->desc))[i]))
434 	(&(((struct e1000_adv_tx_context_desc *)((R)->desc))[i]))
436 /* igb_test_staterr - tests bits within Rx descriptor status and error fields */
440 	return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);  in igb_test_staterr()
443 /* igb_desc_unused - calculate if we have unused descriptors */
444 static inline int igb_desc_unused(struct igb_ring *ring)  in igb_desc_unused()  argument
446 	if (ring->next_to_clean > ring->next_to_use)  in igb_desc_unused()
447 		return ring->next_to_clean - ring->next_to_use - 1;  in igb_desc_unused()
449 	return ring->count + ring->next_to_clean - ring->next_to_use - 1;  in igb_desc_unused()
475 /* The number of L2 ether-type filter registers, Index 3 is reserved
478 #define MAX_ETYPE_FILTER	(4 - 1)
503 	 * match_flags - 1 byte
504 	 * etype - 2 bytes
505 	 * vlan_tci - 2 bytes
576 	u8 __iomem *io_addr; /* Mainly for iounmap use */
693 /* Media Auto Sense */
719 		      struct igb_ring *ring,
765 	if (hw->phy.ops.reset)  in igb_reset_phy()
766 		return hw->phy.ops.reset(hw);  in igb_reset_phy()
773 	if (hw->phy.ops.read_reg)  in igb_read_phy_reg()
774 		return hw->phy.ops.read_reg(hw, offset, data);  in igb_read_phy_reg()
781 	if (hw->phy.ops.write_reg)  in igb_write_phy_reg()
782 		return hw->phy.ops.write_reg(hw, offset, data);  in igb_write_phy_reg()
789 	if (hw->phy.ops.get_phy_info)  in igb_get_phy_info()
790 		return hw->phy.ops.get_phy_info(hw);  in igb_get_phy_info()
797 	return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);  in txring_txq()