1 /* SPDX-License-Identifier: GPL-2.0 */
25 #define IGC_MAX_RX_QUEUES		4
26 #define IGC_MAX_TX_QUEUES		4
37 #define IGC_N_SDP	4
41 #define IGC_MAX_TX_TSTAMP_REGS		4
139 	struct igc_ring *ring;          /* pointer to linked list of rings */  member
144 	u8 itr;                         /* current ITR setting for ring */
155 	void *desc;                     /* descriptor ring memory */
156 	unsigned long flags;            /* ring specific flags */
157 	void __iomem *tail;             /* pointer to ring tail register */
158 	dma_addr_t dma;                 /* phys address of the ring */
159 	unsigned int size;              /* length of desc. ring in bytes */
161 	u16 count;                      /* number of desc. in the ring */
162 	u8 queue_index;                 /* logical index of the ring*/
163 	u8 reg_idx;                     /* physical index of the ring */
322 	/* Free-running timer lock */
326 	struct timespec64 prev_ptp_time; /* Pre-reset PTP clock */
355 int igc_setup_tx_resources(struct igc_ring *ring);
356 int igc_setup_rx_resources(struct igc_ring *ring);
357 void igc_free_tx_resources(struct igc_ring *ring);
358 void igc_free_rx_resources(struct igc_ring *ring);
367 void igc_disable_rx_ring(struct igc_ring *ring);
368 void igc_enable_rx_ring(struct igc_ring *ring);
369 void igc_disable_tx_ring(struct igc_ring *ring);
370 void igc_enable_tx_ring(struct igc_ring *ring);
390 #define IGC_FLAG_DMAC			BIT(4)
410 /* RX-desc Write-Back format RSS Type's */
416 	IGC_RSS_TYPE_HASH_IPV6_EX	= 4,
425 #define IGC_RSS_TYPE_MASK		GENMASK(3,0) /* 4-bits (3:0) = mask 0x0F */
427 /* igc_rss_type - Rx descriptor RSS type field */
430 	/* RSS Type 4-bits (3:0) number: 0-9 (above 9 is reserved)  in igc_rss_type()
434 	return le32_get_bits(rx_desc->wb.lower.lo_dword.data, IGC_RSS_TYPE_MASK);  in igc_rss_type()
478  * PTHRESH - MAC will consider prefetch if it has fewer than this number of
481  * HTHRESH - MAC will only prefetch if there are at least this many descriptors
484  * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
490 #define IGC_RXDCTL_WTHRESH		4
496 #define IGC_TXDCTL_PTHRESH_MASK		GENMASK(4, 0)
522 	(SKB_WITH_OVERHEAD(IGC_RXBUFFER_2048) - IGC_SKB_PAD - IGC_TS_HDR_LEN)
524 #define IGC_MAX_FRAME_BUILD_SKB (IGC_RXBUFFER_2048 - IGC_TS_HDR_LEN)
534 /* igc_test_staterr - tests bits within Rx descriptor status and error fields */
538 	return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);  in igc_test_staterr()
576 #define DESC_NEEDED	(MAX_SKB_FRAGS + 4)
625 	struct igc_ring ring[] ____cacheline_internodealigned_in_smp;  member
633 	IGC_FILTER_FLAG_USER_DATA =	BIT(4),
664  *  - 16 MAC address based filtering rules (highest priority)
665  *  - 8 ethertype based filtering rules
666  *  - 32 Flex filter based filtering rules
667  *  - 8 VLAN priority based filtering rules
668  *  - 1 default queue rule (lowest priority)
683 /* igc_desc_unused - calculate if we have unused descriptors */
684 static inline u16 igc_desc_unused(const struct igc_ring *ring)  in igc_desc_unused()  argument
686 	u16 ntc = ring->next_to_clean;  in igc_desc_unused()
687 	u16 ntu = ring->next_to_use;  in igc_desc_unused()
689 	return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;  in igc_desc_unused()
694 	if (hw->phy.ops.get_phy_info)  in igc_get_phy_info()
695 		return hw->phy.ops.get_phy_info(hw);  in igc_get_phy_info()
702 	if (hw->phy.ops.reset)  in igc_reset_phy()
703 		return hw->phy.ops.reset(hw);  in igc_reset_phy()
710 	return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);  in txring_txq()
725 #define ring_uses_large_buffer(ring) \  argument
726 	test_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
727 #define set_ring_uses_large_buffer(ring) \  argument
728 	set_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
729 #define clear_ring_uses_large_buffer(ring) \  argument
730 	clear_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
732 #define ring_uses_build_skb(ring) \  argument
733 	test_bit(IGC_RING_FLAG_RX_BUILD_SKB_ENABLED, &(ring)->flags)
735 static inline unsigned int igc_rx_bufsz(struct igc_ring *ring)  in igc_rx_bufsz()  argument
738 	if (ring_uses_large_buffer(ring))  in igc_rx_bufsz()
741 	if (ring_uses_build_skb(ring))  in igc_rx_bufsz()
747 static inline unsigned int igc_rx_pg_order(struct igc_ring *ring)  in igc_rx_pg_order()  argument
750 	if (ring_uses_large_buffer(ring))  in igc_rx_pg_order()
758 	if (hw->phy.ops.read_reg)  in igc_read_phy_reg()
759 		return hw->phy.ops.read_reg(hw, offset, data);  in igc_read_phy_reg()
761 	return -EOPNOTSUPP;  in igc_read_phy_reg()
772 void igc_flush_tx_descriptors(struct igc_ring *ring);
795 	(&(((union igc_adv_rx_desc *)((R)->desc))[i]))
797 	(&(((union igc_adv_tx_desc *)((R)->desc))[i]))
799 	(&(((struct igc_adv_tx_context_desc *)((R)->desc))[i]))