2 * Copyright (C) 2015-2017 Netronome Systems, Inc.
4 * This software is dual licensed under the GNU General License Version 2,
5 * June 1991 as shown in the file COPYING in the top-level directory of this
6 * source tree or the BSD 2-Clause License provided below. You have the
7 * option to license this software under the complete terms of either license.
9 * The BSD 2-Clause License:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * 1. Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * 2. Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * Declarations for Netronome network device driver.
37 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
38 * Jason McMullan <jason.mcmullan@netronome.com>
39 * Rolf Neugebauer <rolf.neugebauer@netronome.com>
45 #include <linux/interrupt.h>
46 #include <linux/list.h>
47 #include <linux/netdevice.h>
48 #include <linux/pci.h>
49 #include <linux/io-64-nonatomic-hi-lo.h>
51 #include "nfp_net_ctrl.h"
53 #define nn_pr(nn, lvl, fmt, args...) \
55 struct nfp_net *__nn = (nn); \
57 if (__nn->dp.netdev) \
58 netdev_printk(lvl, __nn->dp.netdev, fmt, ## args); \
60 dev_printk(lvl, __nn->dp.dev, "ctrl: " fmt, ## args); \
63 #define nn_err(nn, fmt, args...) nn_pr(nn, KERN_ERR, fmt, ## args)
64 #define nn_warn(nn, fmt, args...) nn_pr(nn, KERN_WARNING, fmt, ## args)
65 #define nn_info(nn, fmt, args...) nn_pr(nn, KERN_INFO, fmt, ## args)
66 #define nn_dbg(nn, fmt, args...) nn_pr(nn, KERN_DEBUG, fmt, ## args)
68 #define nn_dp_warn(dp, fmt, args...) \
70 struct nfp_net_dp *__dp = (dp); \
72 if (unlikely(net_ratelimit())) { \
74 netdev_warn(__dp->netdev, fmt, ## args); \
76 dev_warn(__dp->dev, fmt, ## args); \
80 /* Max time to wait for NFP to respond on updates (in seconds) */
81 #define NFP_NET_POLL_TIMEOUT 5
83 /* Interval for reading offloaded filter stats */
84 #define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100)
87 #define NFP_NET_CTRL_BAR 0
88 #define NFP_NET_Q0_BAR 2
89 #define NFP_NET_Q1_BAR 4 /* OBSOLETE */
91 /* Max bits in DMA address */
92 #define NFP_NET_MAX_DMA_BITS 40
94 /* Default size for MTU and freelist buffer sizes */
95 #define NFP_NET_DEFAULT_MTU 1500
97 /* Maximum number of bytes prepended to a packet */
98 #define NFP_NET_MAX_PREPEND 64
100 /* Interrupt definitions */
101 #define NFP_NET_NON_Q_VECTORS 2
102 #define NFP_NET_IRQ_LSC_IDX 0
103 #define NFP_NET_IRQ_EXN_IDX 1
104 #define NFP_NET_MIN_VNIC_IRQS (NFP_NET_NON_Q_VECTORS + 1)
106 /* Queue/Ring definitions */
107 #define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */
108 #define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */
109 #define NFP_NET_MAX_R_VECS (NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \
110 NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS)
111 #define NFP_NET_MAX_IRQS (NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS)
113 #define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */
114 #define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */
115 #define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */
116 #define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */
118 #define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */
119 #define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */
121 #define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */
122 #define NFP_NET_XDP_MAX_COMPLETE 2048 /* XDP bufs to reclaim in NAPI poll */
124 /* Offload definitions */
125 #define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16))
127 #define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
128 #define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \
129 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
131 /* Forward declarations */
133 struct nfp_eth_table_port;
135 struct nfp_net_r_vector;
138 /* Convenience macro for wrapping descriptor index on ring size */
139 #define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1))
141 /* Convenience macro for writing dma address into RX/TX descriptors */
142 #define nfp_desc_set_dma_addr(desc, dma_addr) \
144 __typeof(desc) __d = (desc); \
145 dma_addr_t __addr = (dma_addr); \
147 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \
148 __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \
151 /* TX descriptor format */
153 #define PCIE_DESC_TX_EOP BIT(7)
154 #define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0)
155 #define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0)
157 /* Flags in the host TX descriptor */
158 #define PCIE_DESC_TX_CSUM BIT(7)
159 #define PCIE_DESC_TX_IP4_CSUM BIT(6)
160 #define PCIE_DESC_TX_TCP_CSUM BIT(5)
161 #define PCIE_DESC_TX_UDP_CSUM BIT(4)
162 #define PCIE_DESC_TX_VLAN BIT(3)
163 #define PCIE_DESC_TX_LSO BIT(2)
164 #define PCIE_DESC_TX_ENCAP BIT(1)
165 #define PCIE_DESC_TX_O_IP4_CSUM BIT(0)
167 struct nfp_net_tx_desc {
170 u8 dma_addr_hi; /* High bits of host buf address */
171 __le16 dma_len; /* Length to DMA for this desc */
172 u8 offset_eop; /* Offset in buf where pkt starts +
173 * highest bit is eop flag.
175 __le32 dma_addr_lo; /* Low 32bit of host buf addr */
177 __le16 mss; /* MSS to be used for LSO */
178 u8 lso_hdrlen; /* LSO, TCP payload offset */
179 u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */
182 u8 l3_offset; /* L3 header offset */
183 u8 l4_offset; /* L4 header offset */
185 __le16 vlan; /* VLAN tag to add if indicated */
187 __le16 data_len; /* Length of frame + meta data */
194 * struct nfp_net_tx_buf - software TX buffer descriptor
195 * @skb: sk_buff associated with this buffer
196 * @dma_addr: DMA mapping address of the buffer
197 * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags)
198 * @pkt_cnt: Number of packets to be produced out of the skb associated
199 * with this buffer (valid only on the head's buffer).
200 * Will be 1 for all non-TSO packets.
201 * @real_len: Number of bytes which to be produced out of the skb (valid only
202 * on the head's buffer). Equal to skb->len for non-TSO packets.
204 struct nfp_net_tx_buf {
216 * struct nfp_net_tx_ring - TX ring structure
217 * @r_vec: Back pointer to ring vector structure
218 * @idx: Ring index from Linux's perspective
219 * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue
220 * @qcp_q: Pointer to base of the QCP TX queue
221 * @cnt: Size of the queue in number of descriptors
222 * @wr_p: TX ring write pointer (free running)
223 * @rd_p: TX ring read pointer (free running)
224 * @qcp_rd_p: Local copy of QCP TX queue read pointer
225 * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer
226 * (used for .xmit_more delayed kick)
227 * @txbufs: Array of transmitted TX buffers, to free on transmit
228 * @txds: Virtual address of TX ring in host memory
229 * @dma: DMA address of the TX ring
230 * @size: Size, in bytes, of the TX ring (needed to free)
231 * @is_xdp: Is this a XDP TX ring?
233 struct nfp_net_tx_ring {
234 struct nfp_net_r_vector *r_vec;
247 struct nfp_net_tx_buf *txbufs;
248 struct nfp_net_tx_desc *txds;
253 } ____cacheline_aligned;
255 /* RX and freelist descriptor format */
257 #define PCIE_DESC_RX_DD BIT(7)
258 #define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0)
260 /* Flags in the RX descriptor */
261 #define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15))
262 #define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14))
263 #define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13))
264 #define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12))
265 #define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11))
266 #define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10))
267 #define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9))
268 #define PCIE_DESC_RX_BPF cpu_to_le16(BIT(8))
269 #define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7))
270 #define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6))
271 #define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5))
272 #define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4))
273 #define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3))
274 #define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2))
275 #define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1))
276 #define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0))
278 #define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \
279 PCIE_DESC_RX_TCP_CSUM | \
280 PCIE_DESC_RX_UDP_CSUM | \
281 PCIE_DESC_RX_I_IP4_CSUM | \
282 PCIE_DESC_RX_I_TCP_CSUM | \
283 PCIE_DESC_RX_I_UDP_CSUM)
284 #define PCIE_DESC_RX_CSUM_OK_SHIFT 1
285 #define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL)
286 #define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \
287 PCIE_DESC_RX_CSUM_OK_SHIFT)
289 struct nfp_net_rx_desc {
292 u8 dma_addr_hi; /* High bits of the buf address */
293 __le16 reserved; /* Must be zero */
294 u8 meta_len_dd; /* Must be zero */
296 __le32 dma_addr_lo; /* Low bits of the buffer address */
300 __le16 data_len; /* Length of the frame + meta data */
302 u8 meta_len_dd; /* Length of meta data prepended +
303 * descriptor done flag.
306 __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */
307 __le16 vlan; /* VLAN if stripped */
314 #define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0)
316 struct nfp_meta_parsed {
325 struct nfp_net_rx_hash {
331 * struct nfp_net_rx_buf - software RX buffer descriptor
332 * @frag: page fragment buffer
333 * @dma_addr: DMA mapping address of the buffer
335 struct nfp_net_rx_buf {
341 * struct nfp_net_rx_ring - RX ring structure
342 * @r_vec: Back pointer to ring vector structure
343 * @cnt: Size of the queue in number of descriptors
344 * @wr_p: FL/RX ring write pointer (free running)
345 * @rd_p: FL/RX ring read pointer (free running)
346 * @idx: Ring index from Linux's perspective
347 * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist
348 * @qcp_fl: Pointer to base of the QCP freelist queue
349 * @rxbufs: Array of transmitted FL/RX buffers
350 * @rxds: Virtual address of FL/RX ring in host memory
351 * @dma: DMA address of the FL/RX ring
352 * @size: Size, in bytes, of the FL/RX ring (needed to free)
354 struct nfp_net_rx_ring {
355 struct nfp_net_r_vector *r_vec;
366 struct nfp_net_rx_buf *rxbufs;
367 struct nfp_net_rx_desc *rxds;
371 } ____cacheline_aligned;
374 * struct nfp_net_r_vector - Per ring interrupt vector configuration
375 * @nfp_net: Backpointer to nfp_net structure
376 * @napi: NAPI structure for this ring vec
377 * @tx_ring: Pointer to TX ring
378 * @rx_ring: Pointer to RX ring
379 * @xdp_ring: Pointer to an extra TX ring for XDP
380 * @irq_entry: MSI-X table entry (use for talking to the device)
381 * @rx_sync: Seqlock for atomic updates of RX stats
382 * @rx_pkts: Number of received packets
383 * @rx_bytes: Number of received bytes
384 * @rx_drops: Number of packets dropped on RX due to lack of resources
385 * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK
386 * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK
387 * @hw_csum_rx_error: Counter of packets with bad checksums
388 * @tx_sync: Seqlock for atomic updates of TX stats
389 * @tx_pkts: Number of Transmitted packets
390 * @tx_bytes: Number of Transmitted bytes
391 * @hw_csum_tx: Counter of packets with TX checksum offload requested
392 * @hw_csum_tx_inner: Counter of inner TX checksum offload requests
393 * @tx_gather: Counter of packets with Gather DMA
394 * @tx_lso: Counter of LSO packets sent
395 * @tx_errors: How many TX errors were encountered
396 * @tx_busy: How often was TX busy (no space)?
397 * @irq_vector: Interrupt vector number (use for talking to the OS)
398 * @handler: Interrupt handler for this ring vector
399 * @name: Name of the interrupt vector
400 * @affinity_mask: SMP affinity mask for this vector
402 * This structure ties RX and TX rings to interrupt vectors and a NAPI
403 * context. This currently only supports one RX and TX ring per
404 * interrupt vector but might be extended in the future to allow
405 * association of multiple rings per vector.
407 struct nfp_net_r_vector {
408 struct nfp_net *nfp_net;
410 struct napi_struct napi;
412 struct tasklet_struct tasklet;
413 struct sk_buff_head queue;
414 struct spinlock lock;
418 struct nfp_net_tx_ring *tx_ring;
419 struct nfp_net_rx_ring *rx_ring;
423 struct u64_stats_sync rx_sync;
428 u64 hw_csum_rx_inner_ok;
429 u64 hw_csum_rx_error;
431 struct nfp_net_tx_ring *xdp_ring;
433 struct u64_stats_sync tx_sync;
437 u64 hw_csum_tx_inner;
444 irq_handler_t handler;
445 char name[IFNAMSIZ + 8];
446 cpumask_t affinity_mask;
447 } ____cacheline_aligned;
449 /* Firmware version as it is written in the 32bit value in the BAR */
450 struct nfp_net_fw_version {
457 static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver,
458 u8 resv, u8 class, u8 major, u8 minor)
460 return fw_ver->resv == resv &&
461 fw_ver->class == class &&
462 fw_ver->major == major &&
463 fw_ver->minor == minor;
466 struct nfp_stat_pair {
472 * struct nfp_net_dp - NFP network device datapath data structure
473 * @dev: Backpointer to struct device
474 * @netdev: Backpointer to net_device structure
475 * @is_vf: Is the driver attached to a VF?
476 * @bpf_offload_skip_sw: Offloaded BPF program will not be rerun by cls_bpf
477 * @bpf_offload_xdp: Offloaded BPF program is XDP
478 * @chained_metadata_format: Firemware will use new metadata format
479 * @rx_dma_dir: Mapping direction for RX buffers
480 * @rx_dma_off: Offset at which DMA packets (for XDP headroom)
481 * @rx_offset: Offset in the RX buffers where packet data starts
482 * @ctrl: Local copy of the control register/word.
483 * @fl_bufsz: Currently configured size of the freelist buffers
484 * @xdp_prog: Installed XDP program
485 * @tx_rings: Array of pre-allocated TX ring structures
486 * @rx_rings: Array of pre-allocated RX ring structures
487 * @ctrl_bar: Pointer to mapped control BAR
489 * @txd_cnt: Size of the TX ring in number of descriptors
490 * @rxd_cnt: Size of the RX ring in number of descriptors
491 * @num_r_vecs: Number of used ring vectors
492 * @num_tx_rings: Currently configured number of TX rings
493 * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP)
494 * @num_rx_rings: Currently configured number of RX rings
499 struct net_device *netdev;
502 u8 bpf_offload_skip_sw:1;
503 u8 bpf_offload_xdp:1;
504 u8 chained_metadata_format:1;
514 struct bpf_prog *xdp_prog;
516 struct nfp_net_tx_ring *tx_rings;
517 struct nfp_net_rx_ring *rx_rings;
519 u8 __iomem *ctrl_bar;
521 /* Cold data follows */
523 unsigned int txd_cnt;
524 unsigned int rxd_cnt;
526 unsigned int num_r_vecs;
528 unsigned int num_tx_rings;
529 unsigned int num_stack_tx_rings;
530 unsigned int num_rx_rings;
536 * struct nfp_net - NFP network device structure
537 * @dp: Datapath structure
538 * @fw_ver: Firmware version
539 * @cap: Capabilities advertised by the Firmware
540 * @max_mtu: Maximum support MTU advertised by the Firmware
541 * @rss_hfunc: RSS selected hash function
542 * @rss_cfg: RSS configuration
543 * @rss_key: RSS secret key
544 * @rss_itbl: RSS indirection table
545 * @xdp_flags: Flags with which XDP prog was loaded
546 * @xdp_prog: XDP prog (for ctrl path, both DRV and HW modes)
547 * @max_r_vecs: Number of allocated interrupt vectors for RX/TX
548 * @max_tx_rings: Maximum number of TX rings supported by the Firmware
549 * @max_rx_rings: Maximum number of RX rings supported by the Firmware
550 * @r_vecs: Pre-allocated array of ring vectors
551 * @irq_entries: Pre-allocated array of MSI-X entries
552 * @lsc_handler: Handler for Link State Change interrupt
553 * @lsc_name: Name for Link State Change interrupt
554 * @exn_handler: Handler for Exception interrupt
555 * @exn_name: Name for Exception interrupt
556 * @shared_handler: Handler for shared interrupts
557 * @shared_name: Name for shared interrupt
558 * @me_freq_mhz: ME clock_freq (MHz)
559 * @reconfig_lock: Protects HW reconfiguration request regs/machinery
560 * @reconfig_posted: Pending reconfig bits coming from async sources
561 * @reconfig_timer_active: Timer for reading reconfiguration results is pending
562 * @reconfig_sync_present: Some thread is performing synchronous reconfig
563 * @reconfig_timer: Timer for async reading of reconfig results
564 * @link_up: Is the link up?
565 * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading
566 * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter
567 * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter
568 * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter
569 * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter
570 * @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW
571 * @vxlan_usecnt: IPv4/IPv6 VXLAN port use counts
572 * @qcp_cfg: Pointer to QCP queue used for configuration notification
573 * @tx_bar: Pointer to mapped TX queues
574 * @rx_bar: Pointer to mapped FL/RX queues
575 * @debugfs_dir: Device directory in debugfs
576 * @vnic_list: Entry on device vNIC list
577 * @pdev: Backpointer to PCI device
578 * @app: APP handle if available
579 * @port: Pointer to nfp_port structure if vNIC is a port
580 * @app_priv: APP private data for this vNIC
583 struct nfp_net_dp dp;
585 struct nfp_net_fw_version fw_ver;
592 u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ];
593 u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ];
596 struct bpf_prog *xdp_prog;
598 unsigned int max_tx_rings;
599 unsigned int max_rx_rings;
604 unsigned int max_r_vecs;
605 struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS];
606 struct msix_entry irq_entries[NFP_NET_MAX_IRQS];
608 irq_handler_t lsc_handler;
609 char lsc_name[IFNAMSIZ + 8];
611 irq_handler_t exn_handler;
612 char exn_name[IFNAMSIZ + 8];
614 irq_handler_t shared_handler;
615 char shared_name[IFNAMSIZ + 8];
620 spinlock_t link_status_lock;
622 spinlock_t reconfig_lock;
624 bool reconfig_timer_active;
625 bool reconfig_sync_present;
626 struct timer_list reconfig_timer;
628 u32 rx_coalesce_usecs;
629 u32 rx_coalesce_max_frames;
630 u32 tx_coalesce_usecs;
631 u32 tx_coalesce_max_frames;
633 __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS];
634 u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS];
641 struct dentry *debugfs_dir;
643 struct list_head vnic_list;
645 struct pci_dev *pdev;
648 struct nfp_port *port;
653 /* Functions to read/write from/to a BAR
654 * Performs any endian conversion necessary.
656 static inline u16 nn_readb(struct nfp_net *nn, int off)
658 return readb(nn->dp.ctrl_bar + off);
661 static inline void nn_writeb(struct nfp_net *nn, int off, u8 val)
663 writeb(val, nn->dp.ctrl_bar + off);
666 static inline u16 nn_readw(struct nfp_net *nn, int off)
668 return readw(nn->dp.ctrl_bar + off);
671 static inline void nn_writew(struct nfp_net *nn, int off, u16 val)
673 writew(val, nn->dp.ctrl_bar + off);
676 static inline u32 nn_readl(struct nfp_net *nn, int off)
678 return readl(nn->dp.ctrl_bar + off);
681 static inline void nn_writel(struct nfp_net *nn, int off, u32 val)
683 writel(val, nn->dp.ctrl_bar + off);
686 static inline u64 nn_readq(struct nfp_net *nn, int off)
688 return readq(nn->dp.ctrl_bar + off);
691 static inline void nn_writeq(struct nfp_net *nn, int off, u64 val)
693 writeq(val, nn->dp.ctrl_bar + off);
696 /* Flush posted PCI writes by reading something without side effects */
697 static inline void nn_pci_flush(struct nfp_net *nn)
699 nn_readl(nn, NFP_NET_CFG_VERSION);
702 /* Queue Controller Peripheral access functions and definitions.
704 * Some of the BARs of the NFP are mapped to portions of the Queue
705 * Controller Peripheral (QCP) address space on the NFP. A QCP queue
706 * has a read and a write pointer (as well as a size and flags,
707 * indicating overflow etc). The QCP offers a number of different
708 * operation on queue pointers, but here we only offer function to
709 * either add to a pointer or to read the pointer value.
711 #define NFP_QCP_QUEUE_ADDR_SZ 0x800
712 #define NFP_QCP_QUEUE_AREA_SZ 0x80000
713 #define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ)
714 #define NFP_QCP_QUEUE_ADD_RPTR 0x0000
715 #define NFP_QCP_QUEUE_ADD_WPTR 0x0004
716 #define NFP_QCP_QUEUE_STS_LO 0x0008
717 #define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff
718 #define NFP_QCP_QUEUE_STS_HI 0x000c
719 #define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff
721 /* The offset of a QCP queues in the PCIe Target */
722 #define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff)))
724 /* nfp_qcp_ptr - Read or Write Pointer of a queue */
726 NFP_QCP_READ_PTR = 0,
730 /* There appear to be an *undocumented* upper limit on the value which
731 * one can add to a queue and that value is either 0x3f or 0x7f. We
732 * go with 0x3f as a conservative measure.
734 #define NFP_QCP_MAX_ADD 0x3f
736 static inline void _nfp_qcp_ptr_add(u8 __iomem *q,
737 enum nfp_qcp_ptr ptr, u32 val)
741 if (ptr == NFP_QCP_READ_PTR)
742 off = NFP_QCP_QUEUE_ADD_RPTR;
744 off = NFP_QCP_QUEUE_ADD_WPTR;
746 while (val > NFP_QCP_MAX_ADD) {
747 writel(NFP_QCP_MAX_ADD, q + off);
748 val -= NFP_QCP_MAX_ADD;
751 writel(val, q + off);
755 * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue
757 * @q: Base address for queue structure
758 * @val: Value to add to the queue pointer
760 * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed.
762 static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val)
764 _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val);
768 * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue
770 * @q: Base address for queue structure
771 * @val: Value to add to the queue pointer
773 * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed.
775 static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val)
777 _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val);
780 static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr)
785 if (ptr == NFP_QCP_READ_PTR)
786 off = NFP_QCP_QUEUE_STS_LO;
788 off = NFP_QCP_QUEUE_STS_HI;
790 val = readl(q + off);
792 if (ptr == NFP_QCP_READ_PTR)
793 return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask;
795 return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask;
799 * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue
800 * @q: Base address for queue structure
802 * Return: Value read.
804 static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q)
806 return _nfp_qcp_read(q, NFP_QCP_READ_PTR);
810 * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue
811 * @q: Base address for queue structure
813 * Return: Value read.
815 static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q)
817 return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR);
820 static inline bool nfp_net_is_data_vnic(struct nfp_net *nn)
822 WARN_ON_ONCE(!nn->dp.netdev && nn->port);
823 return !!nn->dp.netdev;
826 static inline bool nfp_net_running(struct nfp_net *nn)
828 return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE;
831 static inline const char *nfp_net_name(struct nfp_net *nn)
833 return nn->dp.netdev ? nn->dp.netdev->name : "ctrl";
837 extern const char nfp_driver_version[];
839 extern const struct net_device_ops nfp_net_netdev_ops;
841 static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev)
843 return netdev->netdev_ops == &nfp_net_netdev_ops;
847 void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
848 void __iomem *ctrl_bar);
851 nfp_net_alloc(struct pci_dev *pdev, bool needs_netdev,
852 unsigned int max_tx_rings, unsigned int max_rx_rings);
853 void nfp_net_free(struct nfp_net *nn);
855 int nfp_net_init(struct nfp_net *nn);
856 void nfp_net_clean(struct nfp_net *nn);
858 int nfp_ctrl_open(struct nfp_net *nn);
859 void nfp_ctrl_close(struct nfp_net *nn);
861 void nfp_net_set_ethtool_ops(struct net_device *netdev);
862 void nfp_net_info(struct nfp_net *nn);
863 int nfp_net_reconfig(struct nfp_net *nn, u32 update);
864 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn);
865 void nfp_net_rss_write_itbl(struct nfp_net *nn);
866 void nfp_net_rss_write_key(struct nfp_net *nn);
867 void nfp_net_coalesce_write_cfg(struct nfp_net *nn);
870 nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
871 unsigned int min_irqs, unsigned int want_irqs);
872 void nfp_net_irqs_disable(struct pci_dev *pdev);
874 nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
877 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn);
878 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new,
879 struct netlink_ext_ack *extack);
881 #ifdef CONFIG_NFP_DEBUG
882 void nfp_net_debugfs_create(void);
883 void nfp_net_debugfs_destroy(void);
884 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev);
885 void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id);
886 void nfp_net_debugfs_dir_clean(struct dentry **dir);
888 static inline void nfp_net_debugfs_create(void)
892 static inline void nfp_net_debugfs_destroy(void)
896 static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
902 nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id)
906 static inline void nfp_net_debugfs_dir_clean(struct dentry **dir)
909 #endif /* CONFIG_NFP_DEBUG */
911 #endif /* _NFP_NET_H_ */