1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
2 /* Copyright (C) 2015-2018 Netronome Systems, Inc. */
21 #include <linux/io-64-nonatomic-hi-lo.h>
32 		if (__nn->dp.netdev)					\
33 			netdev_printk(lvl, __nn->dp.netdev, fmt, ## args); \
35 			dev_printk(lvl, __nn->dp.dev, "ctrl: " fmt, ## args); \
48 			if (__dp->netdev)				\
49 				netdev_warn(__dp->netdev, fmt, ## args); \
51 				dev_warn(__dp->dev, fmt, ## args);	\
81 /* Queue/Ring definitions */
83 #define NFP_NET_MAX_RX_RINGS	64	/* Max. # of Rx rings per device */
89 #define NFP_NET_MIN_RX_DESCS	256	/* Min. # of Rx descs per ring */
91 #define NFP_NET_MAX_RX_DESCS	(256 * 1024) /* Max. # of Rx descs per ring */
94 #define NFP_NET_RX_DESCS_DEFAULT 4096	/* Default # of Rx descs per ring */
114 #define D_IDX(ring, idx)	((idx) & ((ring)->cnt - 1))
116 /* Convenience macro for writing dma address into RX/TX descriptors */
122 		__d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr));	\
123 		__d->dma_addr_hi = upper_32_bits(__addr) & 0xff;	\
170  * struct nfp_net_tx_buf - software TX buffer descriptor
174  * @fidx:	Fragment index (-1 for the head and [0..nr_frags-1] for frags)
177  *		Will be 1 for all non-TSO packets.
179  *		on the head's buffer). Equal to skb->len for non-TSO packets.
193  * struct nfp_net_tx_ring - TX ring structure
196  * @qcidx:      Queue Controller Peripheral (QCP) queue index for the TX queue
197  * @qcp_q:      Pointer to base of the QCP TX queue
198  * @cnt:        Size of the queue in number of descriptors
201  * @qcp_rd_p:   Local copy of QCP TX queue read pointer
232 /* RX and freelist descriptor format */
237 /* Flags in the RX descriptor */
283 			__le16 flags;	/* RX flags. See @PCIE_DESC_RX_* */
291 #define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0)
308  * struct nfp_net_rx_buf - software RX buffer descriptor
318  * struct nfp_net_rx_ring - RX ring structure
320  * @cnt:        Size of the queue in number of descriptors
321  * @wr_p:       FL/RX ring write pointer (free running)
322  * @rd_p:       FL/RX ring read pointer (free running)
324  * @fl_qcidx:   Queue Controller Peripheral (QCP) queue index for the freelist
325  * @qcp_fl:     Pointer to base of the QCP freelist queue
326  * @rxbufs:     Array of transmitted FL/RX buffers
327  * @rxds:       Virtual address of FL/RX ring in host memory
328  * @xdp_rxq:    RX-ring info avail for XDP
329  * @dma:        DMA address of the FL/RX ring
330  * @size:       Size, in bytes, of the FL/RX ring (needed to free)
354  * struct nfp_net_r_vector - Per ring interrupt vector configuration
358  * @queue:          ctrl vNIC, send queue
359  * @lock:           ctrl vNIC, r_vec lock protects @queue
361  * @rx_ring:        Pointer to RX ring
363  * @irq_entry:      MSI-X table entry (use for talking to the device)
365  * @rx_dim:	    Dynamic interrupt moderation structure for RX
367  * @rx_sync:	    Seqlock for atomic updates of RX stats
370  * @rx_drops:	    Number of packets dropped on RX due to lack of resources
390  * @rx_replace_buf_alloc_fail:	Counter of RX buffer allocation failures
396  * This structure ties RX and TX rings to interrupt vectors and a NAPI
397  * context. This currently only supports one RX and TX ring per
407 			struct sk_buff_head queue;  member
469 	return fw_ver->resv == resv &&  in nfp_net_fw_ver_eq()
470 	       fw_ver->class == class &&  in nfp_net_fw_ver_eq()
471 	       fw_ver->major == major &&  in nfp_net_fw_ver_eq()
472 	       fw_ver->minor == minor;  in nfp_net_fw_ver_eq()
481  * struct nfp_net_dp - NFP network device datapath data structure
487  * @rx_dma_dir:		Mapping direction for RX buffers
489  * @rx_offset:		Offset in the RX buffers where packet data starts
493  * @tx_rings:		Array of pre-allocated TX ring structures
494  * @rx_rings:		Array of pre-allocated RX ring structures
498  * @rxd_cnt:		Size of the RX ring in number of descriptors
502  * @num_rx_rings:	Currently configured number of RX rings
543  * struct nfp_net - NFP network device structure
555  * @max_r_vecs:		Number of allocated interrupt vectors for RX/TX
557  * @max_rx_rings:       Maximum number of RX rings supported by the Firmware
558  * @stride_rx:		Queue controller RX queue spacing
559  * @stride_tx:		Queue controller TX queue spacing
560  * @r_vecs:             Pre-allocated array of ring vectors
561  * @irq_entries:        Pre-allocated array of MSI-X entries
582  * @rx_coalesce_adapt_on:   Is RX interrupt moderation adaptive?
584  * @rx_coalesce_usecs:      RX interrupt moderation usecs delay parameter
585  * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter
588  * @qcp_cfg:            Pointer to QCP queue used for configuration notification
590  * @rx_bar:             Pointer to mapped FL/RX queues
593  * @ktls_rx_conn_cnt:	Number of offloaded kTLS RX connections
597  * @ktls_rx_resync_req:	Counter of TLS RX resync requested
598  * @ktls_rx_resync_ign:	Counter of TLS RX resync requests ignored
599  * @ktls_rx_resync_sent:    Counter of TLS RX resync completed
601  * @mbox_cmsg.queue:	CCM mbox queue of pending messages
602  * @mbox_cmsg.wq:	CCM mbox wait queue of waiting processes
603  * @mbox_cmsg.workq:	CCM mbox work queue for @wait_work and @runq_work
605  * @mbox_cmsg.runq_work:    CCM mbox posted msg queue runner work
611  * @vnic_no_name:	For non-port PF vNIC make ndo_get_phys_port_name return
612  *			-EOPNOTSUPP to keep backwards compatibility (set by app)
692 		struct sk_buff_head queue;  member
719 	return readb(nn->dp.ctrl_bar + off);  in nn_readb()
724 	writeb(val, nn->dp.ctrl_bar + off);  in nn_writeb()
729 	return readw(nn->dp.ctrl_bar + off);  in nn_readw()
734 	writew(val, nn->dp.ctrl_bar + off);  in nn_writew()
739 	return readl(nn->dp.ctrl_bar + off);  in nn_readl()
744 	writel(val, nn->dp.ctrl_bar + off);  in nn_writel()
749 	return readq(nn->dp.ctrl_bar + off);  in nn_readq()
754 	writeq(val, nn->dp.ctrl_bar + off);  in nn_writeq()
763 /* Queue Controller Peripheral access functions and definitions.
765  * Some of the BARs of the NFP are mapped to portions of the Queue
766  * Controller Peripheral (QCP) address space on the NFP.  A QCP queue
769  * operation on queue pointers, but here we only offer function to
785 /* nfp_qcp_ptr - Read or Write Pointer of a queue */
792  * one can add to a queue and that value is either 0x3f or 0x7f.  We
809 		val -= NFP_QCP_MAX_ADD;  in _nfp_qcp_ptr_add()
816  * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue
818  * @q:   Base address for queue structure
819  * @val: Value to add to the queue pointer
829  * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue
831  * @q:   Base address for queue structure
832  * @val: Value to add to the queue pointer
860  * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue
861  * @q:  Base address for queue structure
871  * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue
872  * @q:  Base address for queue structure
883 	WARN_ON_ONCE(!nn->dp.netdev && nn->port);  in nfp_net_is_data_vnic()
884 	return !!nn->dp.netdev;  in nfp_net_is_data_vnic()
889 	return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE;  in nfp_net_running()
894 	return nn->dp.netdev ? nn->dp.netdev->name : "ctrl";  in nfp_net_name()
898 	__acquires(&nn->r_vecs[0].lock)  in nfp_ctrl_lock()
900 	spin_lock_bh(&nn->r_vecs[0].lock);  in nfp_ctrl_lock()
904 	__releases(&nn->r_vecs[0].lock)  in nfp_ctrl_unlock()
906 	spin_unlock_bh(&nn->r_vecs[0].lock);  in nfp_ctrl_unlock()
911 	down(&nn->bar_lock);  in nn_ctrl_bar_lock()
916 	return !down_trylock(&nn->bar_lock);  in nn_ctrl_bar_trylock()
921 	up(&nn->bar_lock);  in nn_ctrl_bar_unlock()
931 	return netdev->netdev_ops == &nfp_net_netdev_ops;  in nfp_netdev_is_nfp_net()
936 	if ((usecs >= ((1 << 16) - 1)) || (pkts >= ((1 << 16) - 1)))  in nfp_net_coalesce_para_check()
937 		return -EINVAL;  in nfp_net_coalesce_para_check()