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 * Netronome network device driver: Common functions between PF and VF
37 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
38 * Jason McMullan <jason.mcmullan@netronome.com>
39 * Rolf Neugebauer <rolf.neugebauer@netronome.com>
40 * Brad Petrus <brad.petrus@netronome.com>
41 * Chris Telfer <chris.telfer@netronome.com>
44 #include <linux/bitfield.h>
45 #include <linux/bpf.h>
46 #include <linux/bpf_trace.h>
47 #include <linux/module.h>
48 #include <linux/kernel.h>
49 #include <linux/init.h>
51 #include <linux/netdevice.h>
52 #include <linux/etherdevice.h>
53 #include <linux/interrupt.h>
55 #include <linux/ipv6.h>
56 #include <linux/page_ref.h>
57 #include <linux/pci.h>
58 #include <linux/pci_regs.h>
59 #include <linux/msi.h>
60 #include <linux/ethtool.h>
61 #include <linux/log2.h>
62 #include <linux/if_vlan.h>
63 #include <linux/random.h>
64 #include <linux/vmalloc.h>
65 #include <linux/ktime.h>
67 #include <net/vxlan.h>
69 #include "nfpcore/nfp_nsp.h"
71 #include "nfp_net_ctrl.h"
76 * nfp_net_get_fw_version() - Read and parse the FW version
77 * @fw_ver: Output fw_version structure to read to
78 * @ctrl_bar: Mapped address of the control BAR
80 void nfp_net_get_fw_version(struct nfp_net_fw_version
*fw_ver
,
81 void __iomem
*ctrl_bar
)
85 reg
= readl(ctrl_bar
+ NFP_NET_CFG_VERSION
);
86 put_unaligned_le32(reg
, fw_ver
);
89 static dma_addr_t
nfp_net_dma_map_rx(struct nfp_net_dp
*dp
, void *frag
)
91 return dma_map_single_attrs(dp
->dev
, frag
+ NFP_NET_RX_BUF_HEADROOM
,
92 dp
->fl_bufsz
- NFP_NET_RX_BUF_NON_DATA
,
93 dp
->rx_dma_dir
, DMA_ATTR_SKIP_CPU_SYNC
);
97 nfp_net_dma_sync_dev_rx(const struct nfp_net_dp
*dp
, dma_addr_t dma_addr
)
99 dma_sync_single_for_device(dp
->dev
, dma_addr
,
100 dp
->fl_bufsz
- NFP_NET_RX_BUF_NON_DATA
,
104 static void nfp_net_dma_unmap_rx(struct nfp_net_dp
*dp
, dma_addr_t dma_addr
)
106 dma_unmap_single_attrs(dp
->dev
, dma_addr
,
107 dp
->fl_bufsz
- NFP_NET_RX_BUF_NON_DATA
,
108 dp
->rx_dma_dir
, DMA_ATTR_SKIP_CPU_SYNC
);
111 static void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp
*dp
, dma_addr_t dma_addr
,
114 dma_sync_single_for_cpu(dp
->dev
, dma_addr
- NFP_NET_RX_BUF_HEADROOM
,
115 len
, dp
->rx_dma_dir
);
120 * Firmware reconfig may take a while so we have two versions of it -
121 * synchronous and asynchronous (posted). All synchronous callers are holding
122 * RTNL so we don't have to worry about serializing them.
124 static void nfp_net_reconfig_start(struct nfp_net
*nn
, u32 update
)
126 nn_writel(nn
, NFP_NET_CFG_UPDATE
, update
);
127 /* ensure update is written before pinging HW */
129 nfp_qcp_wr_ptr_add(nn
->qcp_cfg
, 1);
132 /* Pass 0 as update to run posted reconfigs. */
133 static void nfp_net_reconfig_start_async(struct nfp_net
*nn
, u32 update
)
135 update
|= nn
->reconfig_posted
;
136 nn
->reconfig_posted
= 0;
138 nfp_net_reconfig_start(nn
, update
);
140 nn
->reconfig_timer_active
= true;
141 mod_timer(&nn
->reconfig_timer
, jiffies
+ NFP_NET_POLL_TIMEOUT
* HZ
);
144 static bool nfp_net_reconfig_check_done(struct nfp_net
*nn
, bool last_check
)
148 reg
= nn_readl(nn
, NFP_NET_CFG_UPDATE
);
151 if (reg
& NFP_NET_CFG_UPDATE_ERR
) {
152 nn_err(nn
, "Reconfig error: 0x%08x\n", reg
);
154 } else if (last_check
) {
155 nn_err(nn
, "Reconfig timeout: 0x%08x\n", reg
);
162 static int nfp_net_reconfig_wait(struct nfp_net
*nn
, unsigned long deadline
)
164 bool timed_out
= false;
166 /* Poll update field, waiting for NFP to ack the config */
167 while (!nfp_net_reconfig_check_done(nn
, timed_out
)) {
169 timed_out
= time_is_before_eq_jiffies(deadline
);
172 if (nn_readl(nn
, NFP_NET_CFG_UPDATE
) & NFP_NET_CFG_UPDATE_ERR
)
175 return timed_out
? -EIO
: 0;
178 static void nfp_net_reconfig_timer(unsigned long data
)
180 struct nfp_net
*nn
= (void *)data
;
182 spin_lock_bh(&nn
->reconfig_lock
);
184 nn
->reconfig_timer_active
= false;
186 /* If sync caller is present it will take over from us */
187 if (nn
->reconfig_sync_present
)
190 /* Read reconfig status and report errors */
191 nfp_net_reconfig_check_done(nn
, true);
193 if (nn
->reconfig_posted
)
194 nfp_net_reconfig_start_async(nn
, 0);
196 spin_unlock_bh(&nn
->reconfig_lock
);
200 * nfp_net_reconfig_post() - Post async reconfig request
201 * @nn: NFP Net device to reconfigure
202 * @update: The value for the update field in the BAR config
204 * Record FW reconfiguration request. Reconfiguration will be kicked off
205 * whenever reconfiguration machinery is idle. Multiple requests can be
208 static void nfp_net_reconfig_post(struct nfp_net
*nn
, u32 update
)
210 spin_lock_bh(&nn
->reconfig_lock
);
212 /* Sync caller will kick off async reconf when it's done, just post */
213 if (nn
->reconfig_sync_present
) {
214 nn
->reconfig_posted
|= update
;
218 /* Opportunistically check if the previous command is done */
219 if (!nn
->reconfig_timer_active
||
220 nfp_net_reconfig_check_done(nn
, false))
221 nfp_net_reconfig_start_async(nn
, update
);
223 nn
->reconfig_posted
|= update
;
225 spin_unlock_bh(&nn
->reconfig_lock
);
229 * nfp_net_reconfig() - Reconfigure the firmware
230 * @nn: NFP Net device to reconfigure
231 * @update: The value for the update field in the BAR config
233 * Write the update word to the BAR and ping the reconfig queue. The
234 * poll until the firmware has acknowledged the update by zeroing the
237 * Return: Negative errno on error, 0 on success
239 int nfp_net_reconfig(struct nfp_net
*nn
, u32 update
)
241 bool cancelled_timer
= false;
242 u32 pre_posted_requests
;
245 spin_lock_bh(&nn
->reconfig_lock
);
247 nn
->reconfig_sync_present
= true;
249 if (nn
->reconfig_timer_active
) {
250 del_timer(&nn
->reconfig_timer
);
251 nn
->reconfig_timer_active
= false;
252 cancelled_timer
= true;
254 pre_posted_requests
= nn
->reconfig_posted
;
255 nn
->reconfig_posted
= 0;
257 spin_unlock_bh(&nn
->reconfig_lock
);
260 nfp_net_reconfig_wait(nn
, nn
->reconfig_timer
.expires
);
262 /* Run the posted reconfigs which were issued before we started */
263 if (pre_posted_requests
) {
264 nfp_net_reconfig_start(nn
, pre_posted_requests
);
265 nfp_net_reconfig_wait(nn
, jiffies
+ HZ
* NFP_NET_POLL_TIMEOUT
);
268 nfp_net_reconfig_start(nn
, update
);
269 ret
= nfp_net_reconfig_wait(nn
, jiffies
+ HZ
* NFP_NET_POLL_TIMEOUT
);
271 spin_lock_bh(&nn
->reconfig_lock
);
273 if (nn
->reconfig_posted
)
274 nfp_net_reconfig_start_async(nn
, 0);
276 nn
->reconfig_sync_present
= false;
278 spin_unlock_bh(&nn
->reconfig_lock
);
284 * nfp_net_reconfig_mbox() - Reconfigure the firmware via the mailbox
285 * @nn: NFP Net device to reconfigure
286 * @mbox_cmd: The value for the mailbox command
288 * Helper function for mailbox updates
290 * Return: Negative errno on error, 0 on success
292 static int nfp_net_reconfig_mbox(struct nfp_net
*nn
, u32 mbox_cmd
)
296 nn_writeq(nn
, NFP_NET_CFG_MBOX_CMD
, mbox_cmd
);
298 ret
= nfp_net_reconfig(nn
, NFP_NET_CFG_UPDATE_MBOX
);
300 nn_err(nn
, "Mailbox update error\n");
304 return -nn_readl(nn
, NFP_NET_CFG_MBOX_RET
);
307 /* Interrupt configuration and handling
311 * nfp_net_irq_unmask() - Unmask automasked interrupt
312 * @nn: NFP Network structure
313 * @entry_nr: MSI-X table entry
315 * Clear the ICR for the IRQ entry.
317 static void nfp_net_irq_unmask(struct nfp_net
*nn
, unsigned int entry_nr
)
319 nn_writeb(nn
, NFP_NET_CFG_ICR(entry_nr
), NFP_NET_CFG_ICR_UNMASKED
);
324 * nfp_net_irqs_alloc() - allocates MSI-X irqs
325 * @pdev: PCI device structure
326 * @irq_entries: Array to be initialized and used to hold the irq entries
327 * @min_irqs: Minimal acceptable number of interrupts
328 * @wanted_irqs: Target number of interrupts to allocate
330 * Return: Number of irqs obtained or 0 on error.
333 nfp_net_irqs_alloc(struct pci_dev
*pdev
, struct msix_entry
*irq_entries
,
334 unsigned int min_irqs
, unsigned int wanted_irqs
)
339 for (i
= 0; i
< wanted_irqs
; i
++)
340 irq_entries
[i
].entry
= i
;
342 got_irqs
= pci_enable_msix_range(pdev
, irq_entries
,
343 min_irqs
, wanted_irqs
);
345 dev_err(&pdev
->dev
, "Failed to enable %d-%d MSI-X (err=%d)\n",
346 min_irqs
, wanted_irqs
, got_irqs
);
350 if (got_irqs
< wanted_irqs
)
351 dev_warn(&pdev
->dev
, "Unable to allocate %d IRQs got only %d\n",
352 wanted_irqs
, got_irqs
);
358 * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev
359 * @nn: NFP Network structure
360 * @irq_entries: Table of allocated interrupts
361 * @n: Size of @irq_entries (number of entries to grab)
363 * After interrupts are allocated with nfp_net_irqs_alloc() this function
364 * should be called to assign them to a specific netdev (port).
367 nfp_net_irqs_assign(struct nfp_net
*nn
, struct msix_entry
*irq_entries
,
370 struct nfp_net_dp
*dp
= &nn
->dp
;
372 nn
->max_r_vecs
= n
- NFP_NET_NON_Q_VECTORS
;
373 dp
->num_r_vecs
= nn
->max_r_vecs
;
375 memcpy(nn
->irq_entries
, irq_entries
, sizeof(*irq_entries
) * n
);
377 if (dp
->num_rx_rings
> dp
->num_r_vecs
||
378 dp
->num_tx_rings
> dp
->num_r_vecs
)
379 dev_warn(nn
->dp
.dev
, "More rings (%d,%d) than vectors (%d).\n",
380 dp
->num_rx_rings
, dp
->num_tx_rings
,
383 dp
->num_rx_rings
= min(dp
->num_r_vecs
, dp
->num_rx_rings
);
384 dp
->num_tx_rings
= min(dp
->num_r_vecs
, dp
->num_tx_rings
);
385 dp
->num_stack_tx_rings
= dp
->num_tx_rings
;
389 * nfp_net_irqs_disable() - Disable interrupts
390 * @pdev: PCI device structure
392 * Undoes what @nfp_net_irqs_alloc() does.
394 void nfp_net_irqs_disable(struct pci_dev
*pdev
)
396 pci_disable_msix(pdev
);
400 * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings.
402 * @data: Opaque data structure
404 * Return: Indicate if the interrupt has been handled.
406 static irqreturn_t
nfp_net_irq_rxtx(int irq
, void *data
)
408 struct nfp_net_r_vector
*r_vec
= data
;
410 napi_schedule_irqoff(&r_vec
->napi
);
412 /* The FW auto-masks any interrupt, either via the MASK bit in
413 * the MSI-X table or via the per entry ICR field. So there
414 * is no need to disable interrupts here.
419 static irqreturn_t
nfp_ctrl_irq_rxtx(int irq
, void *data
)
421 struct nfp_net_r_vector
*r_vec
= data
;
423 tasklet_schedule(&r_vec
->tasklet
);
429 * nfp_net_read_link_status() - Reread link status from control BAR
430 * @nn: NFP Network structure
432 static void nfp_net_read_link_status(struct nfp_net
*nn
)
438 spin_lock_irqsave(&nn
->link_status_lock
, flags
);
440 sts
= nn_readl(nn
, NFP_NET_CFG_STS
);
441 link_up
= !!(sts
& NFP_NET_CFG_STS_LINK
);
443 if (nn
->link_up
== link_up
)
446 nn
->link_up
= link_up
;
448 set_bit(NFP_PORT_CHANGED
, &nn
->port
->flags
);
451 netif_carrier_on(nn
->dp
.netdev
);
452 netdev_info(nn
->dp
.netdev
, "NIC Link is Up\n");
454 netif_carrier_off(nn
->dp
.netdev
);
455 netdev_info(nn
->dp
.netdev
, "NIC Link is Down\n");
458 spin_unlock_irqrestore(&nn
->link_status_lock
, flags
);
462 * nfp_net_irq_lsc() - Interrupt service routine for link state changes
464 * @data: Opaque data structure
466 * Return: Indicate if the interrupt has been handled.
468 static irqreturn_t
nfp_net_irq_lsc(int irq
, void *data
)
470 struct nfp_net
*nn
= data
;
471 struct msix_entry
*entry
;
473 entry
= &nn
->irq_entries
[NFP_NET_IRQ_LSC_IDX
];
475 nfp_net_read_link_status(nn
);
477 nfp_net_irq_unmask(nn
, entry
->entry
);
483 * nfp_net_irq_exn() - Interrupt service routine for exceptions
485 * @data: Opaque data structure
487 * Return: Indicate if the interrupt has been handled.
489 static irqreturn_t
nfp_net_irq_exn(int irq
, void *data
)
491 struct nfp_net
*nn
= data
;
493 nn_err(nn
, "%s: UNIMPLEMENTED.\n", __func__
);
494 /* XXX TO BE IMPLEMENTED */
499 * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring
500 * @tx_ring: TX ring structure
501 * @r_vec: IRQ vector servicing this ring
503 * @is_xdp: Is this an XDP TX ring?
506 nfp_net_tx_ring_init(struct nfp_net_tx_ring
*tx_ring
,
507 struct nfp_net_r_vector
*r_vec
, unsigned int idx
,
510 struct nfp_net
*nn
= r_vec
->nfp_net
;
513 tx_ring
->r_vec
= r_vec
;
514 tx_ring
->is_xdp
= is_xdp
;
516 tx_ring
->qcidx
= tx_ring
->idx
* nn
->stride_tx
;
517 tx_ring
->qcp_q
= nn
->tx_bar
+ NFP_QCP_QUEUE_OFF(tx_ring
->qcidx
);
521 * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring
522 * @rx_ring: RX ring structure
523 * @r_vec: IRQ vector servicing this ring
527 nfp_net_rx_ring_init(struct nfp_net_rx_ring
*rx_ring
,
528 struct nfp_net_r_vector
*r_vec
, unsigned int idx
)
530 struct nfp_net
*nn
= r_vec
->nfp_net
;
533 rx_ring
->r_vec
= r_vec
;
535 rx_ring
->fl_qcidx
= rx_ring
->idx
* nn
->stride_rx
;
536 rx_ring
->qcp_fl
= nn
->rx_bar
+ NFP_QCP_QUEUE_OFF(rx_ring
->fl_qcidx
);
540 * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN)
541 * @nn: NFP Network structure
542 * @ctrl_offset: Control BAR offset where IRQ configuration should be written
543 * @format: printf-style format to construct the interrupt name
544 * @name: Pointer to allocated space for interrupt name
545 * @name_sz: Size of space for interrupt name
546 * @vector_idx: Index of MSI-X vector used for this interrupt
547 * @handler: IRQ handler to register for this interrupt
550 nfp_net_aux_irq_request(struct nfp_net
*nn
, u32 ctrl_offset
,
551 const char *format
, char *name
, size_t name_sz
,
552 unsigned int vector_idx
, irq_handler_t handler
)
554 struct msix_entry
*entry
;
557 entry
= &nn
->irq_entries
[vector_idx
];
559 snprintf(name
, name_sz
, format
, nfp_net_name(nn
));
560 err
= request_irq(entry
->vector
, handler
, 0, name
, nn
);
562 nn_err(nn
, "Failed to request IRQ %d (err=%d).\n",
566 nn_writeb(nn
, ctrl_offset
, entry
->entry
);
572 * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN)
573 * @nn: NFP Network structure
574 * @ctrl_offset: Control BAR offset where IRQ configuration should be written
575 * @vector_idx: Index of MSI-X vector used for this interrupt
577 static void nfp_net_aux_irq_free(struct nfp_net
*nn
, u32 ctrl_offset
,
578 unsigned int vector_idx
)
580 nn_writeb(nn
, ctrl_offset
, 0xff);
581 free_irq(nn
->irq_entries
[vector_idx
].vector
, nn
);
586 * One queue controller peripheral queue is used for transmit. The
587 * driver en-queues packets for transmit by advancing the write
588 * pointer. The device indicates that packets have transmitted by
589 * advancing the read pointer. The driver maintains a local copy of
590 * the read and write pointer in @struct nfp_net_tx_ring. The driver
591 * keeps @wr_p in sync with the queue controller write pointer and can
592 * determine how many packets have been transmitted by comparing its
593 * copy of the read pointer @rd_p with the read pointer maintained by
594 * the queue controller peripheral.
598 * nfp_net_tx_full() - Check if the TX ring is full
599 * @tx_ring: TX ring to check
600 * @dcnt: Number of descriptors that need to be enqueued (must be >= 1)
602 * This function checks, based on the *host copy* of read/write
603 * pointer if a given TX ring is full. The real TX queue may have
604 * some newly made available slots.
606 * Return: True if the ring is full.
608 static int nfp_net_tx_full(struct nfp_net_tx_ring
*tx_ring
, int dcnt
)
610 return (tx_ring
->wr_p
- tx_ring
->rd_p
) >= (tx_ring
->cnt
- dcnt
);
613 /* Wrappers for deciding when to stop and restart TX queues */
614 static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring
*tx_ring
)
616 return !nfp_net_tx_full(tx_ring
, MAX_SKB_FRAGS
* 4);
619 static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring
*tx_ring
)
621 return nfp_net_tx_full(tx_ring
, MAX_SKB_FRAGS
+ 1);
625 * nfp_net_tx_ring_stop() - stop tx ring
626 * @nd_q: netdev queue
627 * @tx_ring: driver tx queue structure
629 * Safely stop TX ring. Remember that while we are running .start_xmit()
630 * someone else may be cleaning the TX ring completions so we need to be
631 * extra careful here.
633 static void nfp_net_tx_ring_stop(struct netdev_queue
*nd_q
,
634 struct nfp_net_tx_ring
*tx_ring
)
636 netif_tx_stop_queue(nd_q
);
638 /* We can race with the TX completion out of NAPI so recheck */
640 if (unlikely(nfp_net_tx_ring_should_wake(tx_ring
)))
641 netif_tx_start_queue(nd_q
);
645 * nfp_net_tx_tso() - Set up Tx descriptor for LSO
646 * @r_vec: per-ring structure
647 * @txbuf: Pointer to driver soft TX descriptor
648 * @txd: Pointer to HW TX descriptor
649 * @skb: Pointer to SKB
651 * Set up Tx descriptor for LSO, do nothing for non-LSO skbs.
652 * Return error on packet header greater than maximum supported LSO header size.
654 static void nfp_net_tx_tso(struct nfp_net_r_vector
*r_vec
,
655 struct nfp_net_tx_buf
*txbuf
,
656 struct nfp_net_tx_desc
*txd
, struct sk_buff
*skb
)
661 if (!skb_is_gso(skb
))
664 if (!skb
->encapsulation
) {
665 txd
->l3_offset
= skb_network_offset(skb
);
666 txd
->l4_offset
= skb_transport_offset(skb
);
667 hdrlen
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
669 txd
->l3_offset
= skb_inner_network_offset(skb
);
670 txd
->l4_offset
= skb_inner_transport_offset(skb
);
671 hdrlen
= skb_inner_transport_header(skb
) - skb
->data
+
672 inner_tcp_hdrlen(skb
);
675 txbuf
->pkt_cnt
= skb_shinfo(skb
)->gso_segs
;
676 txbuf
->real_len
+= hdrlen
* (txbuf
->pkt_cnt
- 1);
678 mss
= skb_shinfo(skb
)->gso_size
& PCIE_DESC_TX_MSS_MASK
;
679 txd
->lso_hdrlen
= hdrlen
;
680 txd
->mss
= cpu_to_le16(mss
);
681 txd
->flags
|= PCIE_DESC_TX_LSO
;
683 u64_stats_update_begin(&r_vec
->tx_sync
);
685 u64_stats_update_end(&r_vec
->tx_sync
);
689 * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor
690 * @dp: NFP Net data path struct
691 * @r_vec: per-ring structure
692 * @txbuf: Pointer to driver soft TX descriptor
693 * @txd: Pointer to TX descriptor
694 * @skb: Pointer to SKB
696 * This function sets the TX checksum flags in the TX descriptor based
697 * on the configuration and the protocol of the packet to be transmitted.
699 static void nfp_net_tx_csum(struct nfp_net_dp
*dp
,
700 struct nfp_net_r_vector
*r_vec
,
701 struct nfp_net_tx_buf
*txbuf
,
702 struct nfp_net_tx_desc
*txd
, struct sk_buff
*skb
)
704 struct ipv6hdr
*ipv6h
;
708 if (!(dp
->ctrl
& NFP_NET_CFG_CTRL_TXCSUM
))
711 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
714 txd
->flags
|= PCIE_DESC_TX_CSUM
;
715 if (skb
->encapsulation
)
716 txd
->flags
|= PCIE_DESC_TX_ENCAP
;
718 iph
= skb
->encapsulation
? inner_ip_hdr(skb
) : ip_hdr(skb
);
719 ipv6h
= skb
->encapsulation
? inner_ipv6_hdr(skb
) : ipv6_hdr(skb
);
721 if (iph
->version
== 4) {
722 txd
->flags
|= PCIE_DESC_TX_IP4_CSUM
;
723 l4_hdr
= iph
->protocol
;
724 } else if (ipv6h
->version
== 6) {
725 l4_hdr
= ipv6h
->nexthdr
;
727 nn_dp_warn(dp
, "partial checksum but ipv=%x!\n", iph
->version
);
733 txd
->flags
|= PCIE_DESC_TX_TCP_CSUM
;
736 txd
->flags
|= PCIE_DESC_TX_UDP_CSUM
;
739 nn_dp_warn(dp
, "partial checksum but l4 proto=%x!\n", l4_hdr
);
743 u64_stats_update_begin(&r_vec
->tx_sync
);
744 if (skb
->encapsulation
)
745 r_vec
->hw_csum_tx_inner
+= txbuf
->pkt_cnt
;
747 r_vec
->hw_csum_tx
+= txbuf
->pkt_cnt
;
748 u64_stats_update_end(&r_vec
->tx_sync
);
751 static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring
*tx_ring
)
754 nfp_qcp_wr_ptr_add(tx_ring
->qcp_q
, tx_ring
->wr_ptr_add
);
755 tx_ring
->wr_ptr_add
= 0;
759 * nfp_net_tx() - Main transmit entry point
760 * @skb: SKB to transmit
761 * @netdev: netdev structure
763 * Return: NETDEV_TX_OK on success.
765 static int nfp_net_tx(struct sk_buff
*skb
, struct net_device
*netdev
)
767 struct nfp_net
*nn
= netdev_priv(netdev
);
768 const struct skb_frag_struct
*frag
;
769 struct nfp_net_tx_desc
*txd
, txdg
;
770 struct nfp_net_tx_ring
*tx_ring
;
771 struct nfp_net_r_vector
*r_vec
;
772 struct nfp_net_tx_buf
*txbuf
;
773 struct netdev_queue
*nd_q
;
774 struct nfp_net_dp
*dp
;
782 qidx
= skb_get_queue_mapping(skb
);
783 tx_ring
= &dp
->tx_rings
[qidx
];
784 r_vec
= tx_ring
->r_vec
;
785 nd_q
= netdev_get_tx_queue(dp
->netdev
, qidx
);
787 nr_frags
= skb_shinfo(skb
)->nr_frags
;
789 if (unlikely(nfp_net_tx_full(tx_ring
, nr_frags
+ 1))) {
790 nn_dp_warn(dp
, "TX ring %d busy. wrp=%u rdp=%u\n",
791 qidx
, tx_ring
->wr_p
, tx_ring
->rd_p
);
792 netif_tx_stop_queue(nd_q
);
793 nfp_net_tx_xmit_more_flush(tx_ring
);
794 u64_stats_update_begin(&r_vec
->tx_sync
);
796 u64_stats_update_end(&r_vec
->tx_sync
);
797 return NETDEV_TX_BUSY
;
800 /* Start with the head skbuf */
801 dma_addr
= dma_map_single(dp
->dev
, skb
->data
, skb_headlen(skb
),
803 if (dma_mapping_error(dp
->dev
, dma_addr
))
806 wr_idx
= D_IDX(tx_ring
, tx_ring
->wr_p
);
808 /* Stash the soft descriptor of the head then initialize it */
809 txbuf
= &tx_ring
->txbufs
[wr_idx
];
811 txbuf
->dma_addr
= dma_addr
;
814 txbuf
->real_len
= skb
->len
;
816 /* Build TX descriptor */
817 txd
= &tx_ring
->txds
[wr_idx
];
818 txd
->offset_eop
= (nr_frags
== 0) ? PCIE_DESC_TX_EOP
: 0;
819 txd
->dma_len
= cpu_to_le16(skb_headlen(skb
));
820 nfp_desc_set_dma_addr(txd
, dma_addr
);
821 txd
->data_len
= cpu_to_le16(skb
->len
);
827 /* Do not reorder - tso may adjust pkt cnt, vlan may override fields */
828 nfp_net_tx_tso(r_vec
, txbuf
, txd
, skb
);
829 nfp_net_tx_csum(dp
, r_vec
, txbuf
, txd
, skb
);
830 if (skb_vlan_tag_present(skb
) && dp
->ctrl
& NFP_NET_CFG_CTRL_TXVLAN
) {
831 txd
->flags
|= PCIE_DESC_TX_VLAN
;
832 txd
->vlan
= cpu_to_le16(skb_vlan_tag_get(skb
));
837 /* all descs must match except for in addr, length and eop */
840 for (f
= 0; f
< nr_frags
; f
++) {
841 frag
= &skb_shinfo(skb
)->frags
[f
];
842 fsize
= skb_frag_size(frag
);
844 dma_addr
= skb_frag_dma_map(dp
->dev
, frag
, 0,
845 fsize
, DMA_TO_DEVICE
);
846 if (dma_mapping_error(dp
->dev
, dma_addr
))
849 wr_idx
= D_IDX(tx_ring
, wr_idx
+ 1);
850 tx_ring
->txbufs
[wr_idx
].skb
= skb
;
851 tx_ring
->txbufs
[wr_idx
].dma_addr
= dma_addr
;
852 tx_ring
->txbufs
[wr_idx
].fidx
= f
;
854 txd
= &tx_ring
->txds
[wr_idx
];
856 txd
->dma_len
= cpu_to_le16(fsize
);
857 nfp_desc_set_dma_addr(txd
, dma_addr
);
859 (f
== nr_frags
- 1) ? PCIE_DESC_TX_EOP
: 0;
862 u64_stats_update_begin(&r_vec
->tx_sync
);
864 u64_stats_update_end(&r_vec
->tx_sync
);
867 netdev_tx_sent_queue(nd_q
, txbuf
->real_len
);
869 tx_ring
->wr_p
+= nr_frags
+ 1;
870 if (nfp_net_tx_ring_should_stop(tx_ring
))
871 nfp_net_tx_ring_stop(nd_q
, tx_ring
);
873 tx_ring
->wr_ptr_add
+= nr_frags
+ 1;
874 if (!skb
->xmit_more
|| netif_xmit_stopped(nd_q
))
875 nfp_net_tx_xmit_more_flush(tx_ring
);
877 skb_tx_timestamp(skb
);
884 frag
= &skb_shinfo(skb
)->frags
[f
];
885 dma_unmap_page(dp
->dev
, tx_ring
->txbufs
[wr_idx
].dma_addr
,
886 skb_frag_size(frag
), DMA_TO_DEVICE
);
887 tx_ring
->txbufs
[wr_idx
].skb
= NULL
;
888 tx_ring
->txbufs
[wr_idx
].dma_addr
= 0;
889 tx_ring
->txbufs
[wr_idx
].fidx
= -2;
892 wr_idx
+= tx_ring
->cnt
;
894 dma_unmap_single(dp
->dev
, tx_ring
->txbufs
[wr_idx
].dma_addr
,
895 skb_headlen(skb
), DMA_TO_DEVICE
);
896 tx_ring
->txbufs
[wr_idx
].skb
= NULL
;
897 tx_ring
->txbufs
[wr_idx
].dma_addr
= 0;
898 tx_ring
->txbufs
[wr_idx
].fidx
= -2;
900 nn_dp_warn(dp
, "Failed to map DMA TX buffer\n");
901 nfp_net_tx_xmit_more_flush(tx_ring
);
902 u64_stats_update_begin(&r_vec
->tx_sync
);
904 u64_stats_update_end(&r_vec
->tx_sync
);
905 dev_kfree_skb_any(skb
);
910 * nfp_net_tx_complete() - Handled completed TX packets
911 * @tx_ring: TX ring structure
913 * Return: Number of completed TX descriptors
915 static void nfp_net_tx_complete(struct nfp_net_tx_ring
*tx_ring
)
917 struct nfp_net_r_vector
*r_vec
= tx_ring
->r_vec
;
918 struct nfp_net_dp
*dp
= &r_vec
->nfp_net
->dp
;
919 const struct skb_frag_struct
*frag
;
920 struct netdev_queue
*nd_q
;
921 u32 done_pkts
= 0, done_bytes
= 0;
928 if (tx_ring
->wr_p
== tx_ring
->rd_p
)
931 /* Work out how many descriptors have been transmitted */
932 qcp_rd_p
= nfp_qcp_rd_ptr_read(tx_ring
->qcp_q
);
934 if (qcp_rd_p
== tx_ring
->qcp_rd_p
)
937 todo
= D_IDX(tx_ring
, qcp_rd_p
- tx_ring
->qcp_rd_p
);
940 idx
= D_IDX(tx_ring
, tx_ring
->rd_p
++);
942 skb
= tx_ring
->txbufs
[idx
].skb
;
946 nr_frags
= skb_shinfo(skb
)->nr_frags
;
947 fidx
= tx_ring
->txbufs
[idx
].fidx
;
951 dma_unmap_single(dp
->dev
, tx_ring
->txbufs
[idx
].dma_addr
,
952 skb_headlen(skb
), DMA_TO_DEVICE
);
954 done_pkts
+= tx_ring
->txbufs
[idx
].pkt_cnt
;
955 done_bytes
+= tx_ring
->txbufs
[idx
].real_len
;
958 frag
= &skb_shinfo(skb
)->frags
[fidx
];
959 dma_unmap_page(dp
->dev
, tx_ring
->txbufs
[idx
].dma_addr
,
960 skb_frag_size(frag
), DMA_TO_DEVICE
);
963 /* check for last gather fragment */
964 if (fidx
== nr_frags
- 1)
965 dev_kfree_skb_any(skb
);
967 tx_ring
->txbufs
[idx
].dma_addr
= 0;
968 tx_ring
->txbufs
[idx
].skb
= NULL
;
969 tx_ring
->txbufs
[idx
].fidx
= -2;
972 tx_ring
->qcp_rd_p
= qcp_rd_p
;
974 u64_stats_update_begin(&r_vec
->tx_sync
);
975 r_vec
->tx_bytes
+= done_bytes
;
976 r_vec
->tx_pkts
+= done_pkts
;
977 u64_stats_update_end(&r_vec
->tx_sync
);
982 nd_q
= netdev_get_tx_queue(dp
->netdev
, tx_ring
->idx
);
983 netdev_tx_completed_queue(nd_q
, done_pkts
, done_bytes
);
984 if (nfp_net_tx_ring_should_wake(tx_ring
)) {
985 /* Make sure TX thread will see updated tx_ring->rd_p */
988 if (unlikely(netif_tx_queue_stopped(nd_q
)))
989 netif_tx_wake_queue(nd_q
);
992 WARN_ONCE(tx_ring
->wr_p
- tx_ring
->rd_p
> tx_ring
->cnt
,
993 "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n",
994 tx_ring
->rd_p
, tx_ring
->wr_p
, tx_ring
->cnt
);
997 static bool nfp_net_xdp_complete(struct nfp_net_tx_ring
*tx_ring
)
999 struct nfp_net_r_vector
*r_vec
= tx_ring
->r_vec
;
1000 u32 done_pkts
= 0, done_bytes
= 0;
1005 /* Work out how many descriptors have been transmitted */
1006 qcp_rd_p
= nfp_qcp_rd_ptr_read(tx_ring
->qcp_q
);
1008 if (qcp_rd_p
== tx_ring
->qcp_rd_p
)
1011 todo
= D_IDX(tx_ring
, qcp_rd_p
- tx_ring
->qcp_rd_p
);
1013 done_all
= todo
<= NFP_NET_XDP_MAX_COMPLETE
;
1014 todo
= min(todo
, NFP_NET_XDP_MAX_COMPLETE
);
1016 tx_ring
->qcp_rd_p
= D_IDX(tx_ring
, tx_ring
->qcp_rd_p
+ todo
);
1020 idx
= D_IDX(tx_ring
, tx_ring
->rd_p
);
1023 done_bytes
+= tx_ring
->txbufs
[idx
].real_len
;
1026 u64_stats_update_begin(&r_vec
->tx_sync
);
1027 r_vec
->tx_bytes
+= done_bytes
;
1028 r_vec
->tx_pkts
+= done_pkts
;
1029 u64_stats_update_end(&r_vec
->tx_sync
);
1031 WARN_ONCE(tx_ring
->wr_p
- tx_ring
->rd_p
> tx_ring
->cnt
,
1032 "XDP TX ring corruption rd_p=%u wr_p=%u cnt=%u\n",
1033 tx_ring
->rd_p
, tx_ring
->wr_p
, tx_ring
->cnt
);
1039 * nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers
1040 * @dp: NFP Net data path struct
1041 * @tx_ring: TX ring structure
1043 * Assumes that the device is stopped
1046 nfp_net_tx_ring_reset(struct nfp_net_dp
*dp
, struct nfp_net_tx_ring
*tx_ring
)
1048 const struct skb_frag_struct
*frag
;
1049 struct netdev_queue
*nd_q
;
1051 while (!tx_ring
->is_xdp
&& tx_ring
->rd_p
!= tx_ring
->wr_p
) {
1052 struct nfp_net_tx_buf
*tx_buf
;
1053 struct sk_buff
*skb
;
1056 idx
= D_IDX(tx_ring
, tx_ring
->rd_p
);
1057 tx_buf
= &tx_ring
->txbufs
[idx
];
1059 skb
= tx_ring
->txbufs
[idx
].skb
;
1060 nr_frags
= skb_shinfo(skb
)->nr_frags
;
1062 if (tx_buf
->fidx
== -1) {
1064 dma_unmap_single(dp
->dev
, tx_buf
->dma_addr
,
1065 skb_headlen(skb
), DMA_TO_DEVICE
);
1067 /* unmap fragment */
1068 frag
= &skb_shinfo(skb
)->frags
[tx_buf
->fidx
];
1069 dma_unmap_page(dp
->dev
, tx_buf
->dma_addr
,
1070 skb_frag_size(frag
), DMA_TO_DEVICE
);
1073 /* check for last gather fragment */
1074 if (tx_buf
->fidx
== nr_frags
- 1)
1075 dev_kfree_skb_any(skb
);
1077 tx_buf
->dma_addr
= 0;
1081 tx_ring
->qcp_rd_p
++;
1085 memset(tx_ring
->txds
, 0, sizeof(*tx_ring
->txds
) * tx_ring
->cnt
);
1088 tx_ring
->qcp_rd_p
= 0;
1089 tx_ring
->wr_ptr_add
= 0;
1091 if (tx_ring
->is_xdp
|| !dp
->netdev
)
1094 nd_q
= netdev_get_tx_queue(dp
->netdev
, tx_ring
->idx
);
1095 netdev_tx_reset_queue(nd_q
);
1098 static void nfp_net_tx_timeout(struct net_device
*netdev
)
1100 struct nfp_net
*nn
= netdev_priv(netdev
);
1103 for (i
= 0; i
< nn
->dp
.netdev
->real_num_tx_queues
; i
++) {
1104 if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev
, i
)))
1106 nn_warn(nn
, "TX timeout on ring: %d\n", i
);
1108 nn_warn(nn
, "TX watchdog timeout\n");
1111 /* Receive processing
1114 nfp_net_calc_fl_bufsz(struct nfp_net_dp
*dp
)
1116 unsigned int fl_bufsz
;
1118 fl_bufsz
= NFP_NET_RX_BUF_HEADROOM
;
1119 fl_bufsz
+= dp
->rx_dma_off
;
1120 if (dp
->rx_offset
== NFP_NET_CFG_RX_OFFSET_DYNAMIC
)
1121 fl_bufsz
+= NFP_NET_MAX_PREPEND
;
1123 fl_bufsz
+= dp
->rx_offset
;
1124 fl_bufsz
+= ETH_HLEN
+ VLAN_HLEN
* 2 + dp
->mtu
;
1126 fl_bufsz
= SKB_DATA_ALIGN(fl_bufsz
);
1127 fl_bufsz
+= SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
1133 nfp_net_free_frag(void *frag
, bool xdp
)
1136 skb_free_frag(frag
);
1138 __free_page(virt_to_page(frag
));
1142 * nfp_net_rx_alloc_one() - Allocate and map page frag for RX
1143 * @dp: NFP Net data path struct
1144 * @dma_addr: Pointer to storage for DMA address (output param)
1146 * This function will allcate a new page frag, map it for DMA.
1148 * Return: allocated page frag or NULL on failure.
1150 static void *nfp_net_rx_alloc_one(struct nfp_net_dp
*dp
, dma_addr_t
*dma_addr
)
1155 frag
= netdev_alloc_frag(dp
->fl_bufsz
);
1157 frag
= page_address(alloc_page(GFP_KERNEL
| __GFP_COLD
));
1159 nn_dp_warn(dp
, "Failed to alloc receive page frag\n");
1163 *dma_addr
= nfp_net_dma_map_rx(dp
, frag
);
1164 if (dma_mapping_error(dp
->dev
, *dma_addr
)) {
1165 nfp_net_free_frag(frag
, dp
->xdp_prog
);
1166 nn_dp_warn(dp
, "Failed to map DMA RX buffer\n");
1173 static void *nfp_net_napi_alloc_one(struct nfp_net_dp
*dp
, dma_addr_t
*dma_addr
)
1178 frag
= napi_alloc_frag(dp
->fl_bufsz
);
1180 frag
= page_address(alloc_page(GFP_ATOMIC
| __GFP_COLD
));
1182 nn_dp_warn(dp
, "Failed to alloc receive page frag\n");
1186 *dma_addr
= nfp_net_dma_map_rx(dp
, frag
);
1187 if (dma_mapping_error(dp
->dev
, *dma_addr
)) {
1188 nfp_net_free_frag(frag
, dp
->xdp_prog
);
1189 nn_dp_warn(dp
, "Failed to map DMA RX buffer\n");
1197 * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings
1198 * @dp: NFP Net data path struct
1199 * @rx_ring: RX ring structure
1200 * @frag: page fragment buffer
1201 * @dma_addr: DMA address of skb mapping
1203 static void nfp_net_rx_give_one(const struct nfp_net_dp
*dp
,
1204 struct nfp_net_rx_ring
*rx_ring
,
1205 void *frag
, dma_addr_t dma_addr
)
1207 unsigned int wr_idx
;
1209 wr_idx
= D_IDX(rx_ring
, rx_ring
->wr_p
);
1211 nfp_net_dma_sync_dev_rx(dp
, dma_addr
);
1213 /* Stash SKB and DMA address away */
1214 rx_ring
->rxbufs
[wr_idx
].frag
= frag
;
1215 rx_ring
->rxbufs
[wr_idx
].dma_addr
= dma_addr
;
1217 /* Fill freelist descriptor */
1218 rx_ring
->rxds
[wr_idx
].fld
.reserved
= 0;
1219 rx_ring
->rxds
[wr_idx
].fld
.meta_len_dd
= 0;
1220 nfp_desc_set_dma_addr(&rx_ring
->rxds
[wr_idx
].fld
,
1221 dma_addr
+ dp
->rx_dma_off
);
1224 if (!(rx_ring
->wr_p
% NFP_NET_FL_BATCH
)) {
1225 /* Update write pointer of the freelist queue. Make
1226 * sure all writes are flushed before telling the hardware.
1229 nfp_qcp_wr_ptr_add(rx_ring
->qcp_fl
, NFP_NET_FL_BATCH
);
1234 * nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable
1235 * @rx_ring: RX ring structure
1237 * Warning: Do *not* call if ring buffers were never put on the FW freelist
1238 * (i.e. device was not enabled)!
1240 static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring
*rx_ring
)
1242 unsigned int wr_idx
, last_idx
;
1244 /* Move the empty entry to the end of the list */
1245 wr_idx
= D_IDX(rx_ring
, rx_ring
->wr_p
);
1246 last_idx
= rx_ring
->cnt
- 1;
1247 rx_ring
->rxbufs
[wr_idx
].dma_addr
= rx_ring
->rxbufs
[last_idx
].dma_addr
;
1248 rx_ring
->rxbufs
[wr_idx
].frag
= rx_ring
->rxbufs
[last_idx
].frag
;
1249 rx_ring
->rxbufs
[last_idx
].dma_addr
= 0;
1250 rx_ring
->rxbufs
[last_idx
].frag
= NULL
;
1252 memset(rx_ring
->rxds
, 0, sizeof(*rx_ring
->rxds
) * rx_ring
->cnt
);
1258 * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring
1259 * @dp: NFP Net data path struct
1260 * @rx_ring: RX ring to remove buffers from
1262 * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1)
1263 * entries. After device is disabled nfp_net_rx_ring_reset() must be called
1264 * to restore required ring geometry.
1267 nfp_net_rx_ring_bufs_free(struct nfp_net_dp
*dp
,
1268 struct nfp_net_rx_ring
*rx_ring
)
1272 for (i
= 0; i
< rx_ring
->cnt
- 1; i
++) {
1273 /* NULL skb can only happen when initial filling of the ring
1274 * fails to allocate enough buffers and calls here to free
1275 * already allocated ones.
1277 if (!rx_ring
->rxbufs
[i
].frag
)
1280 nfp_net_dma_unmap_rx(dp
, rx_ring
->rxbufs
[i
].dma_addr
);
1281 nfp_net_free_frag(rx_ring
->rxbufs
[i
].frag
, dp
->xdp_prog
);
1282 rx_ring
->rxbufs
[i
].dma_addr
= 0;
1283 rx_ring
->rxbufs
[i
].frag
= NULL
;
1288 * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW)
1289 * @dp: NFP Net data path struct
1290 * @rx_ring: RX ring to remove buffers from
1293 nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp
*dp
,
1294 struct nfp_net_rx_ring
*rx_ring
)
1296 struct nfp_net_rx_buf
*rxbufs
;
1299 rxbufs
= rx_ring
->rxbufs
;
1301 for (i
= 0; i
< rx_ring
->cnt
- 1; i
++) {
1302 rxbufs
[i
].frag
= nfp_net_rx_alloc_one(dp
, &rxbufs
[i
].dma_addr
);
1303 if (!rxbufs
[i
].frag
) {
1304 nfp_net_rx_ring_bufs_free(dp
, rx_ring
);
1313 * nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW
1314 * @dp: NFP Net data path struct
1315 * @rx_ring: RX ring to fill
1318 nfp_net_rx_ring_fill_freelist(struct nfp_net_dp
*dp
,
1319 struct nfp_net_rx_ring
*rx_ring
)
1323 for (i
= 0; i
< rx_ring
->cnt
- 1; i
++)
1324 nfp_net_rx_give_one(dp
, rx_ring
, rx_ring
->rxbufs
[i
].frag
,
1325 rx_ring
->rxbufs
[i
].dma_addr
);
1329 * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors
1330 * @flags: RX descriptor flags field in CPU byte order
1332 static int nfp_net_rx_csum_has_errors(u16 flags
)
1334 u16 csum_all_checked
, csum_all_ok
;
1336 csum_all_checked
= flags
& __PCIE_DESC_RX_CSUM_ALL
;
1337 csum_all_ok
= flags
& __PCIE_DESC_RX_CSUM_ALL_OK
;
1339 return csum_all_checked
!= (csum_all_ok
<< PCIE_DESC_RX_CSUM_OK_SHIFT
);
1343 * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags
1344 * @dp: NFP Net data path struct
1345 * @r_vec: per-ring structure
1346 * @rxd: Pointer to RX descriptor
1347 * @meta: Parsed metadata prepend
1348 * @skb: Pointer to SKB
1350 static void nfp_net_rx_csum(struct nfp_net_dp
*dp
,
1351 struct nfp_net_r_vector
*r_vec
,
1352 struct nfp_net_rx_desc
*rxd
,
1353 struct nfp_meta_parsed
*meta
, struct sk_buff
*skb
)
1355 skb_checksum_none_assert(skb
);
1357 if (!(dp
->netdev
->features
& NETIF_F_RXCSUM
))
1360 if (meta
->csum_type
) {
1361 skb
->ip_summed
= meta
->csum_type
;
1362 skb
->csum
= meta
->csum
;
1363 u64_stats_update_begin(&r_vec
->rx_sync
);
1364 r_vec
->hw_csum_rx_ok
++;
1365 u64_stats_update_end(&r_vec
->rx_sync
);
1369 if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd
->rxd
.flags
))) {
1370 u64_stats_update_begin(&r_vec
->rx_sync
);
1371 r_vec
->hw_csum_rx_error
++;
1372 u64_stats_update_end(&r_vec
->rx_sync
);
1376 /* Assume that the firmware will never report inner CSUM_OK unless outer
1377 * L4 headers were successfully parsed. FW will always report zero UDP
1378 * checksum as CSUM_OK.
1380 if (rxd
->rxd
.flags
& PCIE_DESC_RX_TCP_CSUM_OK
||
1381 rxd
->rxd
.flags
& PCIE_DESC_RX_UDP_CSUM_OK
) {
1382 __skb_incr_checksum_unnecessary(skb
);
1383 u64_stats_update_begin(&r_vec
->rx_sync
);
1384 r_vec
->hw_csum_rx_ok
++;
1385 u64_stats_update_end(&r_vec
->rx_sync
);
1388 if (rxd
->rxd
.flags
& PCIE_DESC_RX_I_TCP_CSUM_OK
||
1389 rxd
->rxd
.flags
& PCIE_DESC_RX_I_UDP_CSUM_OK
) {
1390 __skb_incr_checksum_unnecessary(skb
);
1391 u64_stats_update_begin(&r_vec
->rx_sync
);
1392 r_vec
->hw_csum_rx_inner_ok
++;
1393 u64_stats_update_end(&r_vec
->rx_sync
);
1398 nfp_net_set_hash(struct net_device
*netdev
, struct nfp_meta_parsed
*meta
,
1399 unsigned int type
, __be32
*hash
)
1401 if (!(netdev
->features
& NETIF_F_RXHASH
))
1405 case NFP_NET_RSS_IPV4
:
1406 case NFP_NET_RSS_IPV6
:
1407 case NFP_NET_RSS_IPV6_EX
:
1408 meta
->hash_type
= PKT_HASH_TYPE_L3
;
1411 meta
->hash_type
= PKT_HASH_TYPE_L4
;
1415 meta
->hash
= get_unaligned_be32(hash
);
1419 nfp_net_set_hash_desc(struct net_device
*netdev
, struct nfp_meta_parsed
*meta
,
1420 void *data
, struct nfp_net_rx_desc
*rxd
)
1422 struct nfp_net_rx_hash
*rx_hash
= data
;
1424 if (!(rxd
->rxd
.flags
& PCIE_DESC_RX_RSS
))
1427 nfp_net_set_hash(netdev
, meta
, get_unaligned_be32(&rx_hash
->hash_type
),
1432 nfp_net_parse_meta(struct net_device
*netdev
, struct nfp_meta_parsed
*meta
,
1433 void *data
, int meta_len
)
1437 meta_info
= get_unaligned_be32(data
);
1441 switch (meta_info
& NFP_NET_META_FIELD_MASK
) {
1442 case NFP_NET_META_HASH
:
1443 meta_info
>>= NFP_NET_META_FIELD_SIZE
;
1444 nfp_net_set_hash(netdev
, meta
,
1445 meta_info
& NFP_NET_META_FIELD_MASK
,
1449 case NFP_NET_META_MARK
:
1450 meta
->mark
= get_unaligned_be32(data
);
1453 case NFP_NET_META_CSUM
:
1454 meta
->csum_type
= CHECKSUM_COMPLETE
;
1456 (__force __wsum
)__get_unaligned_cpu32(data
);
1463 meta_info
>>= NFP_NET_META_FIELD_SIZE
;
1470 nfp_net_rx_drop(const struct nfp_net_dp
*dp
, struct nfp_net_r_vector
*r_vec
,
1471 struct nfp_net_rx_ring
*rx_ring
, struct nfp_net_rx_buf
*rxbuf
,
1472 struct sk_buff
*skb
)
1474 u64_stats_update_begin(&r_vec
->rx_sync
);
1476 u64_stats_update_end(&r_vec
->rx_sync
);
1478 /* skb is build based on the frag, free_skb() would free the frag
1479 * so to be able to reuse it we need an extra ref.
1481 if (skb
&& rxbuf
&& skb
->head
== rxbuf
->frag
)
1482 page_ref_inc(virt_to_head_page(rxbuf
->frag
));
1484 nfp_net_rx_give_one(dp
, rx_ring
, rxbuf
->frag
, rxbuf
->dma_addr
);
1486 dev_kfree_skb_any(skb
);
1490 nfp_net_tx_xdp_buf(struct nfp_net_dp
*dp
, struct nfp_net_rx_ring
*rx_ring
,
1491 struct nfp_net_tx_ring
*tx_ring
,
1492 struct nfp_net_rx_buf
*rxbuf
, unsigned int dma_off
,
1493 unsigned int pkt_len
, bool *completed
)
1495 struct nfp_net_tx_buf
*txbuf
;
1496 struct nfp_net_tx_desc
*txd
;
1499 if (unlikely(nfp_net_tx_full(tx_ring
, 1))) {
1501 nfp_net_xdp_complete(tx_ring
);
1505 if (unlikely(nfp_net_tx_full(tx_ring
, 1))) {
1506 nfp_net_rx_drop(dp
, rx_ring
->r_vec
, rx_ring
, rxbuf
,
1512 wr_idx
= D_IDX(tx_ring
, tx_ring
->wr_p
);
1514 /* Stash the soft descriptor of the head then initialize it */
1515 txbuf
= &tx_ring
->txbufs
[wr_idx
];
1517 nfp_net_rx_give_one(dp
, rx_ring
, txbuf
->frag
, txbuf
->dma_addr
);
1519 txbuf
->frag
= rxbuf
->frag
;
1520 txbuf
->dma_addr
= rxbuf
->dma_addr
;
1523 txbuf
->real_len
= pkt_len
;
1525 dma_sync_single_for_device(dp
->dev
, rxbuf
->dma_addr
+ dma_off
,
1526 pkt_len
, DMA_BIDIRECTIONAL
);
1528 /* Build TX descriptor */
1529 txd
= &tx_ring
->txds
[wr_idx
];
1530 txd
->offset_eop
= PCIE_DESC_TX_EOP
;
1531 txd
->dma_len
= cpu_to_le16(pkt_len
);
1532 nfp_desc_set_dma_addr(txd
, rxbuf
->dma_addr
+ dma_off
);
1533 txd
->data_len
= cpu_to_le16(pkt_len
);
1537 txd
->lso_hdrlen
= 0;
1540 tx_ring
->wr_ptr_add
++;
1544 static int nfp_net_run_xdp(struct bpf_prog
*prog
, void *data
, void *hard_start
,
1545 unsigned int *off
, unsigned int *len
)
1547 struct xdp_buff xdp
;
1551 xdp
.data_hard_start
= hard_start
;
1552 xdp
.data
= data
+ *off
;
1553 xdp
.data_end
= data
+ *off
+ *len
;
1555 orig_data
= xdp
.data
;
1556 ret
= bpf_prog_run_xdp(prog
, &xdp
);
1558 *len
-= xdp
.data
- orig_data
;
1559 *off
+= xdp
.data
- orig_data
;
1565 * nfp_net_rx() - receive up to @budget packets on @rx_ring
1566 * @rx_ring: RX ring to receive from
1567 * @budget: NAPI budget
1569 * Note, this function is separated out from the napi poll function to
1570 * more cleanly separate packet receive code from other bookkeeping
1571 * functions performed in the napi poll function.
1573 * Return: Number of packets received.
1575 static int nfp_net_rx(struct nfp_net_rx_ring
*rx_ring
, int budget
)
1577 struct nfp_net_r_vector
*r_vec
= rx_ring
->r_vec
;
1578 struct nfp_net_dp
*dp
= &r_vec
->nfp_net
->dp
;
1579 struct nfp_net_tx_ring
*tx_ring
;
1580 struct bpf_prog
*xdp_prog
;
1581 bool xdp_tx_cmpl
= false;
1582 unsigned int true_bufsz
;
1583 struct sk_buff
*skb
;
1584 int pkts_polled
= 0;
1588 xdp_prog
= READ_ONCE(dp
->xdp_prog
);
1589 true_bufsz
= xdp_prog
? PAGE_SIZE
: dp
->fl_bufsz
;
1590 tx_ring
= r_vec
->xdp_ring
;
1592 while (pkts_polled
< budget
) {
1593 unsigned int meta_len
, data_len
, meta_off
, pkt_len
, pkt_off
;
1594 struct nfp_net_rx_buf
*rxbuf
;
1595 struct nfp_net_rx_desc
*rxd
;
1596 struct nfp_meta_parsed meta
;
1597 dma_addr_t new_dma_addr
;
1600 idx
= D_IDX(rx_ring
, rx_ring
->rd_p
);
1602 rxd
= &rx_ring
->rxds
[idx
];
1603 if (!(rxd
->rxd
.meta_len_dd
& PCIE_DESC_RX_DD
))
1606 /* Memory barrier to ensure that we won't do other reads
1607 * before the DD bit.
1611 memset(&meta
, 0, sizeof(meta
));
1616 rxbuf
= &rx_ring
->rxbufs
[idx
];
1618 * <-- [rx_offset] -->
1619 * ---------------------------------------------------------
1620 * | [XX] | metadata | packet | XXXX |
1621 * ---------------------------------------------------------
1622 * <---------------- data_len --------------->
1624 * The rx_offset is fixed for all packets, the meta_len can vary
1625 * on a packet by packet basis. If rx_offset is set to zero
1626 * (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the
1627 * buffer and is immediately followed by the packet (no [XX]).
1629 meta_len
= rxd
->rxd
.meta_len_dd
& PCIE_DESC_RX_META_LEN_MASK
;
1630 data_len
= le16_to_cpu(rxd
->rxd
.data_len
);
1631 pkt_len
= data_len
- meta_len
;
1633 pkt_off
= NFP_NET_RX_BUF_HEADROOM
+ dp
->rx_dma_off
;
1634 if (dp
->rx_offset
== NFP_NET_CFG_RX_OFFSET_DYNAMIC
)
1635 pkt_off
+= meta_len
;
1637 pkt_off
+= dp
->rx_offset
;
1638 meta_off
= pkt_off
- meta_len
;
1641 u64_stats_update_begin(&r_vec
->rx_sync
);
1643 r_vec
->rx_bytes
+= pkt_len
;
1644 u64_stats_update_end(&r_vec
->rx_sync
);
1646 if (unlikely(meta_len
> NFP_NET_MAX_PREPEND
||
1647 (dp
->rx_offset
&& meta_len
> dp
->rx_offset
))) {
1648 nn_dp_warn(dp
, "oversized RX packet metadata %u\n",
1650 nfp_net_rx_drop(dp
, r_vec
, rx_ring
, rxbuf
, NULL
);
1654 nfp_net_dma_sync_cpu_rx(dp
, rxbuf
->dma_addr
+ meta_off
,
1657 if (!dp
->chained_metadata_format
) {
1658 nfp_net_set_hash_desc(dp
->netdev
, &meta
,
1659 rxbuf
->frag
+ meta_off
, rxd
);
1660 } else if (meta_len
) {
1663 end
= nfp_net_parse_meta(dp
->netdev
, &meta
,
1664 rxbuf
->frag
+ meta_off
,
1666 if (unlikely(end
!= rxbuf
->frag
+ pkt_off
)) {
1667 nn_dp_warn(dp
, "invalid RX packet metadata\n");
1668 nfp_net_rx_drop(dp
, r_vec
, rx_ring
, rxbuf
,
1674 if (xdp_prog
&& !(rxd
->rxd
.flags
& PCIE_DESC_RX_BPF
&&
1675 dp
->bpf_offload_xdp
)) {
1676 unsigned int dma_off
;
1680 hard_start
= rxbuf
->frag
+ NFP_NET_RX_BUF_HEADROOM
;
1682 act
= nfp_net_run_xdp(xdp_prog
, rxbuf
->frag
, hard_start
,
1683 &pkt_off
, &pkt_len
);
1688 dma_off
= pkt_off
- NFP_NET_RX_BUF_HEADROOM
;
1689 if (unlikely(!nfp_net_tx_xdp_buf(dp
, rx_ring
,
1694 trace_xdp_exception(dp
->netdev
,
1698 bpf_warn_invalid_xdp_action(act
);
1701 trace_xdp_exception(dp
->netdev
, xdp_prog
, act
);
1704 nfp_net_rx_give_one(dp
, rx_ring
, rxbuf
->frag
,
1710 skb
= build_skb(rxbuf
->frag
, true_bufsz
);
1711 if (unlikely(!skb
)) {
1712 nfp_net_rx_drop(dp
, r_vec
, rx_ring
, rxbuf
, NULL
);
1715 new_frag
= nfp_net_napi_alloc_one(dp
, &new_dma_addr
);
1716 if (unlikely(!new_frag
)) {
1717 nfp_net_rx_drop(dp
, r_vec
, rx_ring
, rxbuf
, skb
);
1721 nfp_net_dma_unmap_rx(dp
, rxbuf
->dma_addr
);
1723 nfp_net_rx_give_one(dp
, rx_ring
, new_frag
, new_dma_addr
);
1725 skb_reserve(skb
, pkt_off
);
1726 skb_put(skb
, pkt_len
);
1728 skb
->mark
= meta
.mark
;
1729 skb_set_hash(skb
, meta
.hash
, meta
.hash_type
);
1731 skb_record_rx_queue(skb
, rx_ring
->idx
);
1732 skb
->protocol
= eth_type_trans(skb
, dp
->netdev
);
1734 nfp_net_rx_csum(dp
, r_vec
, rxd
, &meta
, skb
);
1736 if (rxd
->rxd
.flags
& PCIE_DESC_RX_VLAN
)
1737 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
),
1738 le16_to_cpu(rxd
->rxd
.vlan
));
1740 napi_gro_receive(&rx_ring
->r_vec
->napi
, skb
);
1744 if (tx_ring
->wr_ptr_add
)
1745 nfp_net_tx_xmit_more_flush(tx_ring
);
1746 else if (unlikely(tx_ring
->wr_p
!= tx_ring
->rd_p
) &&
1748 if (!nfp_net_xdp_complete(tx_ring
))
1749 pkts_polled
= budget
;
1757 * nfp_net_poll() - napi poll function
1758 * @napi: NAPI structure
1759 * @budget: NAPI budget
1761 * Return: number of packets polled.
1763 static int nfp_net_poll(struct napi_struct
*napi
, int budget
)
1765 struct nfp_net_r_vector
*r_vec
=
1766 container_of(napi
, struct nfp_net_r_vector
, napi
);
1767 unsigned int pkts_polled
= 0;
1770 nfp_net_tx_complete(r_vec
->tx_ring
);
1772 pkts_polled
= nfp_net_rx(r_vec
->rx_ring
, budget
);
1774 if (pkts_polled
< budget
)
1775 if (napi_complete_done(napi
, pkts_polled
))
1776 nfp_net_irq_unmask(r_vec
->nfp_net
, r_vec
->irq_entry
);
1781 /* Control device data path
1785 nfp_ctrl_tx_one(struct nfp_net
*nn
, struct nfp_net_r_vector
*r_vec
,
1786 struct sk_buff
*skb
, bool old
)
1788 unsigned int real_len
= skb
->len
, meta_len
= 0;
1789 struct nfp_net_tx_ring
*tx_ring
;
1790 struct nfp_net_tx_buf
*txbuf
;
1791 struct nfp_net_tx_desc
*txd
;
1792 struct nfp_net_dp
*dp
;
1793 dma_addr_t dma_addr
;
1796 dp
= &r_vec
->nfp_net
->dp
;
1797 tx_ring
= r_vec
->tx_ring
;
1799 if (WARN_ON_ONCE(skb_shinfo(skb
)->nr_frags
)) {
1800 nn_dp_warn(dp
, "Driver's CTRL TX does not implement gather\n");
1804 if (unlikely(nfp_net_tx_full(tx_ring
, 1))) {
1805 u64_stats_update_begin(&r_vec
->tx_sync
);
1807 u64_stats_update_end(&r_vec
->tx_sync
);
1809 __skb_queue_tail(&r_vec
->queue
, skb
);
1811 __skb_queue_head(&r_vec
->queue
, skb
);
1815 if (nfp_app_ctrl_has_meta(nn
->app
)) {
1816 if (unlikely(skb_headroom(skb
) < 8)) {
1817 nn_dp_warn(dp
, "CTRL TX on skb without headroom\n");
1821 put_unaligned_be32(NFP_META_PORT_ID_CTRL
, skb_push(skb
, 4));
1822 put_unaligned_be32(NFP_NET_META_PORTID
, skb_push(skb
, 4));
1825 /* Start with the head skbuf */
1826 dma_addr
= dma_map_single(dp
->dev
, skb
->data
, skb_headlen(skb
),
1828 if (dma_mapping_error(dp
->dev
, dma_addr
))
1831 wr_idx
= D_IDX(tx_ring
, tx_ring
->wr_p
);
1833 /* Stash the soft descriptor of the head then initialize it */
1834 txbuf
= &tx_ring
->txbufs
[wr_idx
];
1836 txbuf
->dma_addr
= dma_addr
;
1839 txbuf
->real_len
= real_len
;
1841 /* Build TX descriptor */
1842 txd
= &tx_ring
->txds
[wr_idx
];
1843 txd
->offset_eop
= meta_len
| PCIE_DESC_TX_EOP
;
1844 txd
->dma_len
= cpu_to_le16(skb_headlen(skb
));
1845 nfp_desc_set_dma_addr(txd
, dma_addr
);
1846 txd
->data_len
= cpu_to_le16(skb
->len
);
1850 txd
->lso_hdrlen
= 0;
1853 tx_ring
->wr_ptr_add
++;
1854 nfp_net_tx_xmit_more_flush(tx_ring
);
1859 nn_dp_warn(dp
, "Failed to DMA map TX CTRL buffer\n");
1861 u64_stats_update_begin(&r_vec
->tx_sync
);
1863 u64_stats_update_end(&r_vec
->tx_sync
);
1864 dev_kfree_skb_any(skb
);
1868 bool nfp_ctrl_tx(struct nfp_net
*nn
, struct sk_buff
*skb
)
1870 struct nfp_net_r_vector
*r_vec
= &nn
->r_vecs
[0];
1873 spin_lock_bh(&r_vec
->lock
);
1874 ret
= nfp_ctrl_tx_one(nn
, r_vec
, skb
, false);
1875 spin_unlock_bh(&r_vec
->lock
);
1880 static void __nfp_ctrl_tx_queued(struct nfp_net_r_vector
*r_vec
)
1882 struct sk_buff
*skb
;
1884 while ((skb
= __skb_dequeue(&r_vec
->queue
)))
1885 if (nfp_ctrl_tx_one(r_vec
->nfp_net
, r_vec
, skb
, true))
1890 nfp_ctrl_meta_ok(struct nfp_net
*nn
, void *data
, unsigned int meta_len
)
1892 u32 meta_type
, meta_tag
;
1894 if (!nfp_app_ctrl_has_meta(nn
->app
))
1900 meta_type
= get_unaligned_be32(data
);
1901 meta_tag
= get_unaligned_be32(data
+ 4);
1903 return (meta_type
== NFP_NET_META_PORTID
&&
1904 meta_tag
== NFP_META_PORT_ID_CTRL
);
1908 nfp_ctrl_rx_one(struct nfp_net
*nn
, struct nfp_net_dp
*dp
,
1909 struct nfp_net_r_vector
*r_vec
, struct nfp_net_rx_ring
*rx_ring
)
1911 unsigned int meta_len
, data_len
, meta_off
, pkt_len
, pkt_off
;
1912 struct nfp_net_rx_buf
*rxbuf
;
1913 struct nfp_net_rx_desc
*rxd
;
1914 dma_addr_t new_dma_addr
;
1915 struct sk_buff
*skb
;
1919 idx
= D_IDX(rx_ring
, rx_ring
->rd_p
);
1921 rxd
= &rx_ring
->rxds
[idx
];
1922 if (!(rxd
->rxd
.meta_len_dd
& PCIE_DESC_RX_DD
))
1925 /* Memory barrier to ensure that we won't do other reads
1926 * before the DD bit.
1932 rxbuf
= &rx_ring
->rxbufs
[idx
];
1933 meta_len
= rxd
->rxd
.meta_len_dd
& PCIE_DESC_RX_META_LEN_MASK
;
1934 data_len
= le16_to_cpu(rxd
->rxd
.data_len
);
1935 pkt_len
= data_len
- meta_len
;
1937 pkt_off
= NFP_NET_RX_BUF_HEADROOM
+ dp
->rx_dma_off
;
1938 if (dp
->rx_offset
== NFP_NET_CFG_RX_OFFSET_DYNAMIC
)
1939 pkt_off
+= meta_len
;
1941 pkt_off
+= dp
->rx_offset
;
1942 meta_off
= pkt_off
- meta_len
;
1945 u64_stats_update_begin(&r_vec
->rx_sync
);
1947 r_vec
->rx_bytes
+= pkt_len
;
1948 u64_stats_update_end(&r_vec
->rx_sync
);
1950 nfp_net_dma_sync_cpu_rx(dp
, rxbuf
->dma_addr
+ meta_off
, data_len
);
1952 if (unlikely(!nfp_ctrl_meta_ok(nn
, rxbuf
->frag
+ meta_off
, meta_len
))) {
1953 nn_dp_warn(dp
, "incorrect metadata for ctrl packet (%d)\n",
1955 nfp_net_rx_drop(dp
, r_vec
, rx_ring
, rxbuf
, NULL
);
1959 skb
= build_skb(rxbuf
->frag
, dp
->fl_bufsz
);
1960 if (unlikely(!skb
)) {
1961 nfp_net_rx_drop(dp
, r_vec
, rx_ring
, rxbuf
, NULL
);
1964 new_frag
= nfp_net_napi_alloc_one(dp
, &new_dma_addr
);
1965 if (unlikely(!new_frag
)) {
1966 nfp_net_rx_drop(dp
, r_vec
, rx_ring
, rxbuf
, skb
);
1970 nfp_net_dma_unmap_rx(dp
, rxbuf
->dma_addr
);
1972 nfp_net_rx_give_one(dp
, rx_ring
, new_frag
, new_dma_addr
);
1974 skb_reserve(skb
, pkt_off
);
1975 skb_put(skb
, pkt_len
);
1977 nfp_app_ctrl_rx(nn
->app
, skb
);
1982 static void nfp_ctrl_rx(struct nfp_net_r_vector
*r_vec
)
1984 struct nfp_net_rx_ring
*rx_ring
= r_vec
->rx_ring
;
1985 struct nfp_net
*nn
= r_vec
->nfp_net
;
1986 struct nfp_net_dp
*dp
= &nn
->dp
;
1988 while (nfp_ctrl_rx_one(nn
, dp
, r_vec
, rx_ring
))
1992 static void nfp_ctrl_poll(unsigned long arg
)
1994 struct nfp_net_r_vector
*r_vec
= (void *)arg
;
1996 spin_lock_bh(&r_vec
->lock
);
1997 nfp_net_tx_complete(r_vec
->tx_ring
);
1998 __nfp_ctrl_tx_queued(r_vec
);
1999 spin_unlock_bh(&r_vec
->lock
);
2003 nfp_net_irq_unmask(r_vec
->nfp_net
, r_vec
->irq_entry
);
2006 /* Setup and Configuration
2010 * nfp_net_vecs_init() - Assign IRQs and setup rvecs.
2011 * @nn: NFP Network structure
2013 static void nfp_net_vecs_init(struct nfp_net
*nn
)
2015 struct nfp_net_r_vector
*r_vec
;
2018 nn
->lsc_handler
= nfp_net_irq_lsc
;
2019 nn
->exn_handler
= nfp_net_irq_exn
;
2021 for (r
= 0; r
< nn
->max_r_vecs
; r
++) {
2022 struct msix_entry
*entry
;
2024 entry
= &nn
->irq_entries
[NFP_NET_NON_Q_VECTORS
+ r
];
2026 r_vec
= &nn
->r_vecs
[r
];
2027 r_vec
->nfp_net
= nn
;
2028 r_vec
->irq_entry
= entry
->entry
;
2029 r_vec
->irq_vector
= entry
->vector
;
2031 if (nn
->dp
.netdev
) {
2032 r_vec
->handler
= nfp_net_irq_rxtx
;
2034 r_vec
->handler
= nfp_ctrl_irq_rxtx
;
2036 __skb_queue_head_init(&r_vec
->queue
);
2037 spin_lock_init(&r_vec
->lock
);
2038 tasklet_init(&r_vec
->tasklet
, nfp_ctrl_poll
,
2039 (unsigned long)r_vec
);
2040 tasklet_disable(&r_vec
->tasklet
);
2043 cpumask_set_cpu(r
, &r_vec
->affinity_mask
);
2048 * nfp_net_tx_ring_free() - Free resources allocated to a TX ring
2049 * @tx_ring: TX ring to free
2051 static void nfp_net_tx_ring_free(struct nfp_net_tx_ring
*tx_ring
)
2053 struct nfp_net_r_vector
*r_vec
= tx_ring
->r_vec
;
2054 struct nfp_net_dp
*dp
= &r_vec
->nfp_net
->dp
;
2056 kfree(tx_ring
->txbufs
);
2059 dma_free_coherent(dp
->dev
, tx_ring
->size
,
2060 tx_ring
->txds
, tx_ring
->dma
);
2063 tx_ring
->txbufs
= NULL
;
2064 tx_ring
->txds
= NULL
;
2070 * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring
2071 * @dp: NFP Net data path struct
2072 * @tx_ring: TX Ring structure to allocate
2074 * Return: 0 on success, negative errno otherwise.
2077 nfp_net_tx_ring_alloc(struct nfp_net_dp
*dp
, struct nfp_net_tx_ring
*tx_ring
)
2079 struct nfp_net_r_vector
*r_vec
= tx_ring
->r_vec
;
2082 tx_ring
->cnt
= dp
->txd_cnt
;
2084 tx_ring
->size
= sizeof(*tx_ring
->txds
) * tx_ring
->cnt
;
2085 tx_ring
->txds
= dma_zalloc_coherent(dp
->dev
, tx_ring
->size
,
2086 &tx_ring
->dma
, GFP_KERNEL
);
2090 sz
= sizeof(*tx_ring
->txbufs
) * tx_ring
->cnt
;
2091 tx_ring
->txbufs
= kzalloc(sz
, GFP_KERNEL
);
2092 if (!tx_ring
->txbufs
)
2095 if (!tx_ring
->is_xdp
&& dp
->netdev
)
2096 netif_set_xps_queue(dp
->netdev
, &r_vec
->affinity_mask
,
2102 nfp_net_tx_ring_free(tx_ring
);
2107 nfp_net_tx_ring_bufs_free(struct nfp_net_dp
*dp
,
2108 struct nfp_net_tx_ring
*tx_ring
)
2112 if (!tx_ring
->is_xdp
)
2115 for (i
= 0; i
< tx_ring
->cnt
; i
++) {
2116 if (!tx_ring
->txbufs
[i
].frag
)
2119 nfp_net_dma_unmap_rx(dp
, tx_ring
->txbufs
[i
].dma_addr
);
2120 __free_page(virt_to_page(tx_ring
->txbufs
[i
].frag
));
2125 nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp
*dp
,
2126 struct nfp_net_tx_ring
*tx_ring
)
2128 struct nfp_net_tx_buf
*txbufs
= tx_ring
->txbufs
;
2131 if (!tx_ring
->is_xdp
)
2134 for (i
= 0; i
< tx_ring
->cnt
; i
++) {
2135 txbufs
[i
].frag
= nfp_net_rx_alloc_one(dp
, &txbufs
[i
].dma_addr
);
2136 if (!txbufs
[i
].frag
) {
2137 nfp_net_tx_ring_bufs_free(dp
, tx_ring
);
2145 static int nfp_net_tx_rings_prepare(struct nfp_net
*nn
, struct nfp_net_dp
*dp
)
2149 dp
->tx_rings
= kcalloc(dp
->num_tx_rings
, sizeof(*dp
->tx_rings
),
2154 for (r
= 0; r
< dp
->num_tx_rings
; r
++) {
2157 if (r
>= dp
->num_stack_tx_rings
)
2158 bias
= dp
->num_stack_tx_rings
;
2160 nfp_net_tx_ring_init(&dp
->tx_rings
[r
], &nn
->r_vecs
[r
- bias
],
2163 if (nfp_net_tx_ring_alloc(dp
, &dp
->tx_rings
[r
]))
2166 if (nfp_net_tx_ring_bufs_alloc(dp
, &dp
->tx_rings
[r
]))
2174 nfp_net_tx_ring_bufs_free(dp
, &dp
->tx_rings
[r
]);
2176 nfp_net_tx_ring_free(&dp
->tx_rings
[r
]);
2178 kfree(dp
->tx_rings
);
2182 static void nfp_net_tx_rings_free(struct nfp_net_dp
*dp
)
2186 for (r
= 0; r
< dp
->num_tx_rings
; r
++) {
2187 nfp_net_tx_ring_bufs_free(dp
, &dp
->tx_rings
[r
]);
2188 nfp_net_tx_ring_free(&dp
->tx_rings
[r
]);
2191 kfree(dp
->tx_rings
);
2195 * nfp_net_rx_ring_free() - Free resources allocated to a RX ring
2196 * @rx_ring: RX ring to free
2198 static void nfp_net_rx_ring_free(struct nfp_net_rx_ring
*rx_ring
)
2200 struct nfp_net_r_vector
*r_vec
= rx_ring
->r_vec
;
2201 struct nfp_net_dp
*dp
= &r_vec
->nfp_net
->dp
;
2203 kfree(rx_ring
->rxbufs
);
2206 dma_free_coherent(dp
->dev
, rx_ring
->size
,
2207 rx_ring
->rxds
, rx_ring
->dma
);
2210 rx_ring
->rxbufs
= NULL
;
2211 rx_ring
->rxds
= NULL
;
2217 * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring
2218 * @dp: NFP Net data path struct
2219 * @rx_ring: RX ring to allocate
2221 * Return: 0 on success, negative errno otherwise.
2224 nfp_net_rx_ring_alloc(struct nfp_net_dp
*dp
, struct nfp_net_rx_ring
*rx_ring
)
2228 rx_ring
->cnt
= dp
->rxd_cnt
;
2229 rx_ring
->size
= sizeof(*rx_ring
->rxds
) * rx_ring
->cnt
;
2230 rx_ring
->rxds
= dma_zalloc_coherent(dp
->dev
, rx_ring
->size
,
2231 &rx_ring
->dma
, GFP_KERNEL
);
2235 sz
= sizeof(*rx_ring
->rxbufs
) * rx_ring
->cnt
;
2236 rx_ring
->rxbufs
= kzalloc(sz
, GFP_KERNEL
);
2237 if (!rx_ring
->rxbufs
)
2243 nfp_net_rx_ring_free(rx_ring
);
2247 static int nfp_net_rx_rings_prepare(struct nfp_net
*nn
, struct nfp_net_dp
*dp
)
2251 dp
->rx_rings
= kcalloc(dp
->num_rx_rings
, sizeof(*dp
->rx_rings
),
2256 for (r
= 0; r
< dp
->num_rx_rings
; r
++) {
2257 nfp_net_rx_ring_init(&dp
->rx_rings
[r
], &nn
->r_vecs
[r
], r
);
2259 if (nfp_net_rx_ring_alloc(dp
, &dp
->rx_rings
[r
]))
2262 if (nfp_net_rx_ring_bufs_alloc(dp
, &dp
->rx_rings
[r
]))
2270 nfp_net_rx_ring_bufs_free(dp
, &dp
->rx_rings
[r
]);
2272 nfp_net_rx_ring_free(&dp
->rx_rings
[r
]);
2274 kfree(dp
->rx_rings
);
2278 static void nfp_net_rx_rings_free(struct nfp_net_dp
*dp
)
2282 for (r
= 0; r
< dp
->num_rx_rings
; r
++) {
2283 nfp_net_rx_ring_bufs_free(dp
, &dp
->rx_rings
[r
]);
2284 nfp_net_rx_ring_free(&dp
->rx_rings
[r
]);
2287 kfree(dp
->rx_rings
);
2291 nfp_net_vector_assign_rings(struct nfp_net_dp
*dp
,
2292 struct nfp_net_r_vector
*r_vec
, int idx
)
2294 r_vec
->rx_ring
= idx
< dp
->num_rx_rings
? &dp
->rx_rings
[idx
] : NULL
;
2296 idx
< dp
->num_stack_tx_rings
? &dp
->tx_rings
[idx
] : NULL
;
2298 r_vec
->xdp_ring
= idx
< dp
->num_tx_rings
- dp
->num_stack_tx_rings
?
2299 &dp
->tx_rings
[dp
->num_stack_tx_rings
+ idx
] : NULL
;
2303 nfp_net_prepare_vector(struct nfp_net
*nn
, struct nfp_net_r_vector
*r_vec
,
2310 netif_napi_add(nn
->dp
.netdev
, &r_vec
->napi
,
2311 nfp_net_poll
, NAPI_POLL_WEIGHT
);
2313 tasklet_enable(&r_vec
->tasklet
);
2315 snprintf(r_vec
->name
, sizeof(r_vec
->name
),
2316 "%s-rxtx-%d", nfp_net_name(nn
), idx
);
2317 err
= request_irq(r_vec
->irq_vector
, r_vec
->handler
, 0, r_vec
->name
,
2321 netif_napi_del(&r_vec
->napi
);
2323 tasklet_disable(&r_vec
->tasklet
);
2325 nn_err(nn
, "Error requesting IRQ %d\n", r_vec
->irq_vector
);
2328 disable_irq(r_vec
->irq_vector
);
2330 irq_set_affinity_hint(r_vec
->irq_vector
, &r_vec
->affinity_mask
);
2332 nn_dbg(nn
, "RV%02d: irq=%03d/%03d\n", idx
, r_vec
->irq_vector
,
2339 nfp_net_cleanup_vector(struct nfp_net
*nn
, struct nfp_net_r_vector
*r_vec
)
2341 irq_set_affinity_hint(r_vec
->irq_vector
, NULL
);
2343 netif_napi_del(&r_vec
->napi
);
2345 tasklet_disable(&r_vec
->tasklet
);
2347 free_irq(r_vec
->irq_vector
, r_vec
);
2351 * nfp_net_rss_write_itbl() - Write RSS indirection table to device
2352 * @nn: NFP Net device to reconfigure
2354 void nfp_net_rss_write_itbl(struct nfp_net
*nn
)
2358 for (i
= 0; i
< NFP_NET_CFG_RSS_ITBL_SZ
; i
+= 4)
2359 nn_writel(nn
, NFP_NET_CFG_RSS_ITBL
+ i
,
2360 get_unaligned_le32(nn
->rss_itbl
+ i
));
2364 * nfp_net_rss_write_key() - Write RSS hash key to device
2365 * @nn: NFP Net device to reconfigure
2367 void nfp_net_rss_write_key(struct nfp_net
*nn
)
2371 for (i
= 0; i
< nfp_net_rss_key_sz(nn
); i
+= 4)
2372 nn_writel(nn
, NFP_NET_CFG_RSS_KEY
+ i
,
2373 get_unaligned_le32(nn
->rss_key
+ i
));
2377 * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW
2378 * @nn: NFP Net device to reconfigure
2380 void nfp_net_coalesce_write_cfg(struct nfp_net
*nn
)
2386 /* Compute factor used to convert coalesce '_usecs' parameters to
2387 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
2390 factor
= nn
->me_freq_mhz
/ 16;
2392 /* copy RX interrupt coalesce parameters */
2393 value
= (nn
->rx_coalesce_max_frames
<< 16) |
2394 (factor
* nn
->rx_coalesce_usecs
);
2395 for (i
= 0; i
< nn
->dp
.num_rx_rings
; i
++)
2396 nn_writel(nn
, NFP_NET_CFG_RXR_IRQ_MOD(i
), value
);
2398 /* copy TX interrupt coalesce parameters */
2399 value
= (nn
->tx_coalesce_max_frames
<< 16) |
2400 (factor
* nn
->tx_coalesce_usecs
);
2401 for (i
= 0; i
< nn
->dp
.num_tx_rings
; i
++)
2402 nn_writel(nn
, NFP_NET_CFG_TXR_IRQ_MOD(i
), value
);
2406 * nfp_net_write_mac_addr() - Write mac address to the device control BAR
2407 * @nn: NFP Net device to reconfigure
2408 * @addr: MAC address to write
2410 * Writes the MAC address from the netdev to the device control BAR. Does not
2411 * perform the required reconfig. We do a bit of byte swapping dance because
2414 static void nfp_net_write_mac_addr(struct nfp_net
*nn
, const u8
*addr
)
2416 nn_writel(nn
, NFP_NET_CFG_MACADDR
+ 0, get_unaligned_be32(addr
));
2417 nn_writew(nn
, NFP_NET_CFG_MACADDR
+ 6, get_unaligned_be16(addr
+ 4));
2420 static void nfp_net_vec_clear_ring_data(struct nfp_net
*nn
, unsigned int idx
)
2422 nn_writeq(nn
, NFP_NET_CFG_RXR_ADDR(idx
), 0);
2423 nn_writeb(nn
, NFP_NET_CFG_RXR_SZ(idx
), 0);
2424 nn_writeb(nn
, NFP_NET_CFG_RXR_VEC(idx
), 0);
2426 nn_writeq(nn
, NFP_NET_CFG_TXR_ADDR(idx
), 0);
2427 nn_writeb(nn
, NFP_NET_CFG_TXR_SZ(idx
), 0);
2428 nn_writeb(nn
, NFP_NET_CFG_TXR_VEC(idx
), 0);
2432 * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP
2433 * @nn: NFP Net device to reconfigure
2435 static void nfp_net_clear_config_and_disable(struct nfp_net
*nn
)
2437 u32 new_ctrl
, update
;
2441 new_ctrl
= nn
->dp
.ctrl
;
2442 new_ctrl
&= ~NFP_NET_CFG_CTRL_ENABLE
;
2443 update
= NFP_NET_CFG_UPDATE_GEN
;
2444 update
|= NFP_NET_CFG_UPDATE_MSIX
;
2445 update
|= NFP_NET_CFG_UPDATE_RING
;
2447 if (nn
->cap
& NFP_NET_CFG_CTRL_RINGCFG
)
2448 new_ctrl
&= ~NFP_NET_CFG_CTRL_RINGCFG
;
2450 nn_writeq(nn
, NFP_NET_CFG_TXRS_ENABLE
, 0);
2451 nn_writeq(nn
, NFP_NET_CFG_RXRS_ENABLE
, 0);
2453 nn_writel(nn
, NFP_NET_CFG_CTRL
, new_ctrl
);
2454 err
= nfp_net_reconfig(nn
, update
);
2456 nn_err(nn
, "Could not disable device: %d\n", err
);
2458 for (r
= 0; r
< nn
->dp
.num_rx_rings
; r
++)
2459 nfp_net_rx_ring_reset(&nn
->dp
.rx_rings
[r
]);
2460 for (r
= 0; r
< nn
->dp
.num_tx_rings
; r
++)
2461 nfp_net_tx_ring_reset(&nn
->dp
, &nn
->dp
.tx_rings
[r
]);
2462 for (r
= 0; r
< nn
->dp
.num_r_vecs
; r
++)
2463 nfp_net_vec_clear_ring_data(nn
, r
);
2465 nn
->dp
.ctrl
= new_ctrl
;
2469 nfp_net_rx_ring_hw_cfg_write(struct nfp_net
*nn
,
2470 struct nfp_net_rx_ring
*rx_ring
, unsigned int idx
)
2472 /* Write the DMA address, size and MSI-X info to the device */
2473 nn_writeq(nn
, NFP_NET_CFG_RXR_ADDR(idx
), rx_ring
->dma
);
2474 nn_writeb(nn
, NFP_NET_CFG_RXR_SZ(idx
), ilog2(rx_ring
->cnt
));
2475 nn_writeb(nn
, NFP_NET_CFG_RXR_VEC(idx
), rx_ring
->r_vec
->irq_entry
);
2479 nfp_net_tx_ring_hw_cfg_write(struct nfp_net
*nn
,
2480 struct nfp_net_tx_ring
*tx_ring
, unsigned int idx
)
2482 nn_writeq(nn
, NFP_NET_CFG_TXR_ADDR(idx
), tx_ring
->dma
);
2483 nn_writeb(nn
, NFP_NET_CFG_TXR_SZ(idx
), ilog2(tx_ring
->cnt
));
2484 nn_writeb(nn
, NFP_NET_CFG_TXR_VEC(idx
), tx_ring
->r_vec
->irq_entry
);
2488 * nfp_net_set_config_and_enable() - Write control BAR and enable NFP
2489 * @nn: NFP Net device to reconfigure
2491 static int nfp_net_set_config_and_enable(struct nfp_net
*nn
)
2493 u32 bufsz
, new_ctrl
, update
= 0;
2497 new_ctrl
= nn
->dp
.ctrl
;
2499 if (nn
->dp
.ctrl
& NFP_NET_CFG_CTRL_RSS_ANY
) {
2500 nfp_net_rss_write_key(nn
);
2501 nfp_net_rss_write_itbl(nn
);
2502 nn_writel(nn
, NFP_NET_CFG_RSS_CTRL
, nn
->rss_cfg
);
2503 update
|= NFP_NET_CFG_UPDATE_RSS
;
2506 if (nn
->dp
.ctrl
& NFP_NET_CFG_CTRL_IRQMOD
) {
2507 nfp_net_coalesce_write_cfg(nn
);
2508 update
|= NFP_NET_CFG_UPDATE_IRQMOD
;
2511 for (r
= 0; r
< nn
->dp
.num_tx_rings
; r
++)
2512 nfp_net_tx_ring_hw_cfg_write(nn
, &nn
->dp
.tx_rings
[r
], r
);
2513 for (r
= 0; r
< nn
->dp
.num_rx_rings
; r
++)
2514 nfp_net_rx_ring_hw_cfg_write(nn
, &nn
->dp
.rx_rings
[r
], r
);
2516 nn_writeq(nn
, NFP_NET_CFG_TXRS_ENABLE
, nn
->dp
.num_tx_rings
== 64 ?
2517 0xffffffffffffffffULL
: ((u64
)1 << nn
->dp
.num_tx_rings
) - 1);
2519 nn_writeq(nn
, NFP_NET_CFG_RXRS_ENABLE
, nn
->dp
.num_rx_rings
== 64 ?
2520 0xffffffffffffffffULL
: ((u64
)1 << nn
->dp
.num_rx_rings
) - 1);
2523 nfp_net_write_mac_addr(nn
, nn
->dp
.netdev
->dev_addr
);
2525 nn_writel(nn
, NFP_NET_CFG_MTU
, nn
->dp
.mtu
);
2527 bufsz
= nn
->dp
.fl_bufsz
- nn
->dp
.rx_dma_off
- NFP_NET_RX_BUF_NON_DATA
;
2528 nn_writel(nn
, NFP_NET_CFG_FLBUFSZ
, bufsz
);
2531 new_ctrl
|= NFP_NET_CFG_CTRL_ENABLE
;
2532 update
|= NFP_NET_CFG_UPDATE_GEN
;
2533 update
|= NFP_NET_CFG_UPDATE_MSIX
;
2534 update
|= NFP_NET_CFG_UPDATE_RING
;
2535 if (nn
->cap
& NFP_NET_CFG_CTRL_RINGCFG
)
2536 new_ctrl
|= NFP_NET_CFG_CTRL_RINGCFG
;
2538 nn_writel(nn
, NFP_NET_CFG_CTRL
, new_ctrl
);
2539 err
= nfp_net_reconfig(nn
, update
);
2541 nfp_net_clear_config_and_disable(nn
);
2545 nn
->dp
.ctrl
= new_ctrl
;
2547 for (r
= 0; r
< nn
->dp
.num_rx_rings
; r
++)
2548 nfp_net_rx_ring_fill_freelist(&nn
->dp
, &nn
->dp
.rx_rings
[r
]);
2550 /* Since reconfiguration requests while NFP is down are ignored we
2551 * have to wipe the entire VXLAN configuration and reinitialize it.
2553 if (nn
->dp
.ctrl
& NFP_NET_CFG_CTRL_VXLAN
) {
2554 memset(&nn
->vxlan_ports
, 0, sizeof(nn
->vxlan_ports
));
2555 memset(&nn
->vxlan_usecnt
, 0, sizeof(nn
->vxlan_usecnt
));
2556 udp_tunnel_get_rx_info(nn
->dp
.netdev
);
2563 * nfp_net_close_stack() - Quiesce the stack (part of close)
2564 * @nn: NFP Net device to reconfigure
2566 static void nfp_net_close_stack(struct nfp_net
*nn
)
2570 disable_irq(nn
->irq_entries
[NFP_NET_IRQ_LSC_IDX
].vector
);
2571 netif_carrier_off(nn
->dp
.netdev
);
2572 nn
->link_up
= false;
2574 for (r
= 0; r
< nn
->dp
.num_r_vecs
; r
++) {
2575 disable_irq(nn
->r_vecs
[r
].irq_vector
);
2576 napi_disable(&nn
->r_vecs
[r
].napi
);
2579 netif_tx_disable(nn
->dp
.netdev
);
2583 * nfp_net_close_free_all() - Free all runtime resources
2584 * @nn: NFP Net device to reconfigure
2586 static void nfp_net_close_free_all(struct nfp_net
*nn
)
2590 nfp_net_tx_rings_free(&nn
->dp
);
2591 nfp_net_rx_rings_free(&nn
->dp
);
2593 for (r
= 0; r
< nn
->dp
.num_r_vecs
; r
++)
2594 nfp_net_cleanup_vector(nn
, &nn
->r_vecs
[r
]);
2596 nfp_net_aux_irq_free(nn
, NFP_NET_CFG_LSC
, NFP_NET_IRQ_LSC_IDX
);
2597 nfp_net_aux_irq_free(nn
, NFP_NET_CFG_EXN
, NFP_NET_IRQ_EXN_IDX
);
2601 * nfp_net_netdev_close() - Called when the device is downed
2602 * @netdev: netdev structure
2604 static int nfp_net_netdev_close(struct net_device
*netdev
)
2606 struct nfp_net
*nn
= netdev_priv(netdev
);
2608 /* Step 1: Disable RX and TX rings from the Linux kernel perspective
2610 nfp_net_close_stack(nn
);
2614 nfp_net_clear_config_and_disable(nn
);
2616 /* Step 3: Free resources
2618 nfp_net_close_free_all(nn
);
2620 nn_dbg(nn
, "%s down", netdev
->name
);
2624 void nfp_ctrl_close(struct nfp_net
*nn
)
2630 for (r
= 0; r
< nn
->dp
.num_r_vecs
; r
++) {
2631 disable_irq(nn
->r_vecs
[r
].irq_vector
);
2632 tasklet_disable(&nn
->r_vecs
[r
].tasklet
);
2635 nfp_net_clear_config_and_disable(nn
);
2637 nfp_net_close_free_all(nn
);
2643 * nfp_net_open_stack() - Start the device from stack's perspective
2644 * @nn: NFP Net device to reconfigure
2646 static void nfp_net_open_stack(struct nfp_net
*nn
)
2650 for (r
= 0; r
< nn
->dp
.num_r_vecs
; r
++) {
2651 napi_enable(&nn
->r_vecs
[r
].napi
);
2652 enable_irq(nn
->r_vecs
[r
].irq_vector
);
2655 netif_tx_wake_all_queues(nn
->dp
.netdev
);
2657 enable_irq(nn
->irq_entries
[NFP_NET_IRQ_LSC_IDX
].vector
);
2658 nfp_net_read_link_status(nn
);
2661 static int nfp_net_open_alloc_all(struct nfp_net
*nn
)
2665 err
= nfp_net_aux_irq_request(nn
, NFP_NET_CFG_EXN
, "%s-exn",
2666 nn
->exn_name
, sizeof(nn
->exn_name
),
2667 NFP_NET_IRQ_EXN_IDX
, nn
->exn_handler
);
2670 err
= nfp_net_aux_irq_request(nn
, NFP_NET_CFG_LSC
, "%s-lsc",
2671 nn
->lsc_name
, sizeof(nn
->lsc_name
),
2672 NFP_NET_IRQ_LSC_IDX
, nn
->lsc_handler
);
2675 disable_irq(nn
->irq_entries
[NFP_NET_IRQ_LSC_IDX
].vector
);
2677 for (r
= 0; r
< nn
->dp
.num_r_vecs
; r
++) {
2678 err
= nfp_net_prepare_vector(nn
, &nn
->r_vecs
[r
], r
);
2680 goto err_cleanup_vec_p
;
2683 err
= nfp_net_rx_rings_prepare(nn
, &nn
->dp
);
2685 goto err_cleanup_vec
;
2687 err
= nfp_net_tx_rings_prepare(nn
, &nn
->dp
);
2689 goto err_free_rx_rings
;
2691 for (r
= 0; r
< nn
->max_r_vecs
; r
++)
2692 nfp_net_vector_assign_rings(&nn
->dp
, &nn
->r_vecs
[r
], r
);
2697 nfp_net_rx_rings_free(&nn
->dp
);
2699 r
= nn
->dp
.num_r_vecs
;
2702 nfp_net_cleanup_vector(nn
, &nn
->r_vecs
[r
]);
2703 nfp_net_aux_irq_free(nn
, NFP_NET_CFG_LSC
, NFP_NET_IRQ_LSC_IDX
);
2705 nfp_net_aux_irq_free(nn
, NFP_NET_CFG_EXN
, NFP_NET_IRQ_EXN_IDX
);
2709 static int nfp_net_netdev_open(struct net_device
*netdev
)
2711 struct nfp_net
*nn
= netdev_priv(netdev
);
2714 /* Step 1: Allocate resources for rings and the like
2715 * - Request interrupts
2716 * - Allocate RX and TX ring resources
2717 * - Setup initial RSS table
2719 err
= nfp_net_open_alloc_all(nn
);
2723 err
= netif_set_real_num_tx_queues(netdev
, nn
->dp
.num_stack_tx_rings
);
2727 err
= netif_set_real_num_rx_queues(netdev
, nn
->dp
.num_rx_rings
);
2731 /* Step 2: Configure the NFP
2732 * - Enable rings from 0 to tx_rings/rx_rings - 1.
2733 * - Write MAC address (in case it changed)
2735 * - Set the Freelist buffer size
2738 err
= nfp_net_set_config_and_enable(nn
);
2742 /* Step 3: Enable for kernel
2743 * - put some freelist descriptors on each RX ring
2744 * - enable NAPI on each ring
2745 * - enable all TX queues
2748 nfp_net_open_stack(nn
);
2753 nfp_net_close_free_all(nn
);
2757 int nfp_ctrl_open(struct nfp_net
*nn
)
2761 /* ring dumping depends on vNICs being opened/closed under rtnl */
2764 err
= nfp_net_open_alloc_all(nn
);
2768 err
= nfp_net_set_config_and_enable(nn
);
2772 for (r
= 0; r
< nn
->dp
.num_r_vecs
; r
++)
2773 enable_irq(nn
->r_vecs
[r
].irq_vector
);
2780 nfp_net_close_free_all(nn
);
2786 static void nfp_net_set_rx_mode(struct net_device
*netdev
)
2788 struct nfp_net
*nn
= netdev_priv(netdev
);
2791 new_ctrl
= nn
->dp
.ctrl
;
2793 if (netdev
->flags
& IFF_PROMISC
) {
2794 if (nn
->cap
& NFP_NET_CFG_CTRL_PROMISC
)
2795 new_ctrl
|= NFP_NET_CFG_CTRL_PROMISC
;
2797 nn_warn(nn
, "FW does not support promiscuous mode\n");
2799 new_ctrl
&= ~NFP_NET_CFG_CTRL_PROMISC
;
2802 if (new_ctrl
== nn
->dp
.ctrl
)
2805 nn_writel(nn
, NFP_NET_CFG_CTRL
, new_ctrl
);
2806 nfp_net_reconfig_post(nn
, NFP_NET_CFG_UPDATE_GEN
);
2808 nn
->dp
.ctrl
= new_ctrl
;
2811 static void nfp_net_rss_init_itbl(struct nfp_net
*nn
)
2815 for (i
= 0; i
< sizeof(nn
->rss_itbl
); i
++)
2817 ethtool_rxfh_indir_default(i
, nn
->dp
.num_rx_rings
);
2820 static void nfp_net_dp_swap(struct nfp_net
*nn
, struct nfp_net_dp
*dp
)
2822 struct nfp_net_dp new_dp
= *dp
;
2827 nn
->dp
.netdev
->mtu
= new_dp
.mtu
;
2829 if (!netif_is_rxfh_configured(nn
->dp
.netdev
))
2830 nfp_net_rss_init_itbl(nn
);
2833 static int nfp_net_dp_swap_enable(struct nfp_net
*nn
, struct nfp_net_dp
*dp
)
2838 nfp_net_dp_swap(nn
, dp
);
2840 for (r
= 0; r
< nn
->max_r_vecs
; r
++)
2841 nfp_net_vector_assign_rings(&nn
->dp
, &nn
->r_vecs
[r
], r
);
2843 err
= netif_set_real_num_rx_queues(nn
->dp
.netdev
, nn
->dp
.num_rx_rings
);
2847 if (nn
->dp
.netdev
->real_num_tx_queues
!= nn
->dp
.num_stack_tx_rings
) {
2848 err
= netif_set_real_num_tx_queues(nn
->dp
.netdev
,
2849 nn
->dp
.num_stack_tx_rings
);
2854 return nfp_net_set_config_and_enable(nn
);
2857 struct nfp_net_dp
*nfp_net_clone_dp(struct nfp_net
*nn
)
2859 struct nfp_net_dp
*new;
2861 new = kmalloc(sizeof(*new), GFP_KERNEL
);
2867 /* Clear things which need to be recomputed */
2869 new->tx_rings
= NULL
;
2870 new->rx_rings
= NULL
;
2871 new->num_r_vecs
= 0;
2872 new->num_stack_tx_rings
= 0;
2878 nfp_net_check_config(struct nfp_net
*nn
, struct nfp_net_dp
*dp
,
2879 struct netlink_ext_ack
*extack
)
2881 /* XDP-enabled tests */
2884 if (dp
->fl_bufsz
> PAGE_SIZE
) {
2885 NL_SET_ERR_MSG_MOD(extack
, "MTU too large w/ XDP enabled");
2888 if (dp
->num_tx_rings
> nn
->max_tx_rings
) {
2889 NL_SET_ERR_MSG_MOD(extack
, "Insufficient number of TX rings w/ XDP enabled");
2896 int nfp_net_ring_reconfig(struct nfp_net
*nn
, struct nfp_net_dp
*dp
,
2897 struct netlink_ext_ack
*extack
)
2901 dp
->fl_bufsz
= nfp_net_calc_fl_bufsz(dp
);
2903 dp
->num_stack_tx_rings
= dp
->num_tx_rings
;
2905 dp
->num_stack_tx_rings
-= dp
->num_rx_rings
;
2907 dp
->num_r_vecs
= max(dp
->num_rx_rings
, dp
->num_stack_tx_rings
);
2909 err
= nfp_net_check_config(nn
, dp
, extack
);
2913 if (!netif_running(dp
->netdev
)) {
2914 nfp_net_dp_swap(nn
, dp
);
2919 /* Prepare new rings */
2920 for (r
= nn
->dp
.num_r_vecs
; r
< dp
->num_r_vecs
; r
++) {
2921 err
= nfp_net_prepare_vector(nn
, &nn
->r_vecs
[r
], r
);
2924 goto err_cleanup_vecs
;
2928 err
= nfp_net_rx_rings_prepare(nn
, dp
);
2930 goto err_cleanup_vecs
;
2932 err
= nfp_net_tx_rings_prepare(nn
, dp
);
2936 /* Stop device, swap in new rings, try to start the firmware */
2937 nfp_net_close_stack(nn
);
2938 nfp_net_clear_config_and_disable(nn
);
2940 err
= nfp_net_dp_swap_enable(nn
, dp
);
2944 nfp_net_clear_config_and_disable(nn
);
2946 /* Try with old configuration and old rings */
2947 err2
= nfp_net_dp_swap_enable(nn
, dp
);
2949 nn_err(nn
, "Can't restore ring config - FW communication failed (%d,%d)\n",
2952 for (r
= dp
->num_r_vecs
- 1; r
>= nn
->dp
.num_r_vecs
; r
--)
2953 nfp_net_cleanup_vector(nn
, &nn
->r_vecs
[r
]);
2955 nfp_net_rx_rings_free(dp
);
2956 nfp_net_tx_rings_free(dp
);
2958 nfp_net_open_stack(nn
);
2965 nfp_net_rx_rings_free(dp
);
2967 for (r
= dp
->num_r_vecs
- 1; r
>= nn
->dp
.num_r_vecs
; r
--)
2968 nfp_net_cleanup_vector(nn
, &nn
->r_vecs
[r
]);
2973 static int nfp_net_change_mtu(struct net_device
*netdev
, int new_mtu
)
2975 struct nfp_net
*nn
= netdev_priv(netdev
);
2976 struct nfp_net_dp
*dp
;
2978 dp
= nfp_net_clone_dp(nn
);
2984 return nfp_net_ring_reconfig(nn
, dp
, NULL
);
2988 nfp_net_vlan_rx_add_vid(struct net_device
*netdev
, __be16 proto
, u16 vid
)
2990 struct nfp_net
*nn
= netdev_priv(netdev
);
2992 /* Priority tagged packets with vlan id 0 are processed by the
2993 * NFP as untagged packets
2998 nn_writew(nn
, NFP_NET_CFG_VLAN_FILTER_VID
, vid
);
2999 nn_writew(nn
, NFP_NET_CFG_VLAN_FILTER_PROTO
, ETH_P_8021Q
);
3001 return nfp_net_reconfig_mbox(nn
, NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD
);
3005 nfp_net_vlan_rx_kill_vid(struct net_device
*netdev
, __be16 proto
, u16 vid
)
3007 struct nfp_net
*nn
= netdev_priv(netdev
);
3009 /* Priority tagged packets with vlan id 0 are processed by the
3010 * NFP as untagged packets
3015 nn_writew(nn
, NFP_NET_CFG_VLAN_FILTER_VID
, vid
);
3016 nn_writew(nn
, NFP_NET_CFG_VLAN_FILTER_PROTO
, ETH_P_8021Q
);
3018 return nfp_net_reconfig_mbox(nn
, NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL
);
3021 static void nfp_net_stat64(struct net_device
*netdev
,
3022 struct rtnl_link_stats64
*stats
)
3024 struct nfp_net
*nn
= netdev_priv(netdev
);
3027 for (r
= 0; r
< nn
->dp
.num_r_vecs
; r
++) {
3028 struct nfp_net_r_vector
*r_vec
= &nn
->r_vecs
[r
];
3033 start
= u64_stats_fetch_begin(&r_vec
->rx_sync
);
3034 data
[0] = r_vec
->rx_pkts
;
3035 data
[1] = r_vec
->rx_bytes
;
3036 data
[2] = r_vec
->rx_drops
;
3037 } while (u64_stats_fetch_retry(&r_vec
->rx_sync
, start
));
3038 stats
->rx_packets
+= data
[0];
3039 stats
->rx_bytes
+= data
[1];
3040 stats
->rx_dropped
+= data
[2];
3043 start
= u64_stats_fetch_begin(&r_vec
->tx_sync
);
3044 data
[0] = r_vec
->tx_pkts
;
3045 data
[1] = r_vec
->tx_bytes
;
3046 data
[2] = r_vec
->tx_errors
;
3047 } while (u64_stats_fetch_retry(&r_vec
->tx_sync
, start
));
3048 stats
->tx_packets
+= data
[0];
3049 stats
->tx_bytes
+= data
[1];
3050 stats
->tx_errors
+= data
[2];
3055 nfp_net_setup_tc(struct net_device
*netdev
, u32 handle
, u32 chain_index
,
3056 __be16 proto
, struct tc_to_netdev
*tc
)
3058 struct nfp_net
*nn
= netdev_priv(netdev
);
3063 return nfp_app_setup_tc(nn
->app
, netdev
, handle
, proto
, tc
);
3066 static int nfp_net_set_features(struct net_device
*netdev
,
3067 netdev_features_t features
)
3069 netdev_features_t changed
= netdev
->features
^ features
;
3070 struct nfp_net
*nn
= netdev_priv(netdev
);
3074 /* Assume this is not called with features we have not advertised */
3076 new_ctrl
= nn
->dp
.ctrl
;
3078 if (changed
& NETIF_F_RXCSUM
) {
3079 if (features
& NETIF_F_RXCSUM
)
3080 new_ctrl
|= nn
->cap
& NFP_NET_CFG_CTRL_RXCSUM_ANY
;
3082 new_ctrl
&= ~NFP_NET_CFG_CTRL_RXCSUM_ANY
;
3085 if (changed
& (NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
)) {
3086 if (features
& (NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
))
3087 new_ctrl
|= NFP_NET_CFG_CTRL_TXCSUM
;
3089 new_ctrl
&= ~NFP_NET_CFG_CTRL_TXCSUM
;
3092 if (changed
& (NETIF_F_TSO
| NETIF_F_TSO6
)) {
3093 if (features
& (NETIF_F_TSO
| NETIF_F_TSO6
))
3094 new_ctrl
|= nn
->cap
& NFP_NET_CFG_CTRL_LSO2
?:
3095 NFP_NET_CFG_CTRL_LSO
;
3097 new_ctrl
&= ~NFP_NET_CFG_CTRL_LSO_ANY
;
3100 if (changed
& NETIF_F_HW_VLAN_CTAG_RX
) {
3101 if (features
& NETIF_F_HW_VLAN_CTAG_RX
)
3102 new_ctrl
|= NFP_NET_CFG_CTRL_RXVLAN
;
3104 new_ctrl
&= ~NFP_NET_CFG_CTRL_RXVLAN
;
3107 if (changed
& NETIF_F_HW_VLAN_CTAG_TX
) {
3108 if (features
& NETIF_F_HW_VLAN_CTAG_TX
)
3109 new_ctrl
|= NFP_NET_CFG_CTRL_TXVLAN
;
3111 new_ctrl
&= ~NFP_NET_CFG_CTRL_TXVLAN
;
3114 if (changed
& NETIF_F_HW_VLAN_CTAG_FILTER
) {
3115 if (features
& NETIF_F_HW_VLAN_CTAG_FILTER
)
3116 new_ctrl
|= NFP_NET_CFG_CTRL_CTAG_FILTER
;
3118 new_ctrl
&= ~NFP_NET_CFG_CTRL_CTAG_FILTER
;
3121 if (changed
& NETIF_F_SG
) {
3122 if (features
& NETIF_F_SG
)
3123 new_ctrl
|= NFP_NET_CFG_CTRL_GATHER
;
3125 new_ctrl
&= ~NFP_NET_CFG_CTRL_GATHER
;
3128 if (changed
& NETIF_F_HW_TC
&& nfp_app_tc_busy(nn
->app
, nn
)) {
3129 nn_err(nn
, "Cannot disable HW TC offload while in use\n");
3133 nn_dbg(nn
, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
3134 netdev
->features
, features
, changed
);
3136 if (new_ctrl
== nn
->dp
.ctrl
)
3139 nn_dbg(nn
, "NIC ctrl: 0x%x -> 0x%x\n", nn
->dp
.ctrl
, new_ctrl
);
3140 nn_writel(nn
, NFP_NET_CFG_CTRL
, new_ctrl
);
3141 err
= nfp_net_reconfig(nn
, NFP_NET_CFG_UPDATE_GEN
);
3145 nn
->dp
.ctrl
= new_ctrl
;
3150 static netdev_features_t
3151 nfp_net_features_check(struct sk_buff
*skb
, struct net_device
*dev
,
3152 netdev_features_t features
)
3156 /* We can't do TSO over double tagged packets (802.1AD) */
3157 features
&= vlan_features_check(skb
, features
);
3159 if (!skb
->encapsulation
)
3162 /* Ensure that inner L4 header offset fits into TX descriptor field */
3163 if (skb_is_gso(skb
)) {
3166 hdrlen
= skb_inner_transport_header(skb
) - skb
->data
+
3167 inner_tcp_hdrlen(skb
);
3169 if (unlikely(hdrlen
> NFP_NET_LSO_MAX_HDR_SZ
))
3170 features
&= ~NETIF_F_GSO_MASK
;
3173 /* VXLAN/GRE check */
3174 switch (vlan_get_protocol(skb
)) {
3175 case htons(ETH_P_IP
):
3176 l4_hdr
= ip_hdr(skb
)->protocol
;
3178 case htons(ETH_P_IPV6
):
3179 l4_hdr
= ipv6_hdr(skb
)->nexthdr
;
3182 return features
& ~(NETIF_F_CSUM_MASK
| NETIF_F_GSO_MASK
);
3185 if (skb
->inner_protocol_type
!= ENCAP_TYPE_ETHER
||
3186 skb
->inner_protocol
!= htons(ETH_P_TEB
) ||
3187 (l4_hdr
!= IPPROTO_UDP
&& l4_hdr
!= IPPROTO_GRE
) ||
3188 (l4_hdr
== IPPROTO_UDP
&&
3189 (skb_inner_mac_header(skb
) - skb_transport_header(skb
) !=
3190 sizeof(struct udphdr
) + sizeof(struct vxlanhdr
))))
3191 return features
& ~(NETIF_F_CSUM_MASK
| NETIF_F_GSO_MASK
);
3197 * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW
3198 * @nn: NFP Net device to reconfigure
3199 * @idx: Index into the port table where new port should be written
3200 * @port: UDP port to configure (pass zero to remove VXLAN port)
3202 static void nfp_net_set_vxlan_port(struct nfp_net
*nn
, int idx
, __be16 port
)
3206 nn
->vxlan_ports
[idx
] = port
;
3208 if (!(nn
->dp
.ctrl
& NFP_NET_CFG_CTRL_VXLAN
))
3211 BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS
& 1);
3212 for (i
= 0; i
< NFP_NET_N_VXLAN_PORTS
; i
+= 2)
3213 nn_writel(nn
, NFP_NET_CFG_VXLAN_PORT
+ i
* sizeof(port
),
3214 be16_to_cpu(nn
->vxlan_ports
[i
+ 1]) << 16 |
3215 be16_to_cpu(nn
->vxlan_ports
[i
]));
3217 nfp_net_reconfig_post(nn
, NFP_NET_CFG_UPDATE_VXLAN
);
3221 * nfp_net_find_vxlan_idx() - find table entry of the port or a free one
3222 * @nn: NFP Network structure
3223 * @port: UDP port to look for
3225 * Return: if the port is already in the table -- it's position;
3226 * if the port is not in the table -- free position to use;
3227 * if the table is full -- -ENOSPC.
3229 static int nfp_net_find_vxlan_idx(struct nfp_net
*nn
, __be16 port
)
3231 int i
, free_idx
= -ENOSPC
;
3233 for (i
= 0; i
< NFP_NET_N_VXLAN_PORTS
; i
++) {
3234 if (nn
->vxlan_ports
[i
] == port
)
3236 if (!nn
->vxlan_usecnt
[i
])
3243 static void nfp_net_add_vxlan_port(struct net_device
*netdev
,
3244 struct udp_tunnel_info
*ti
)
3246 struct nfp_net
*nn
= netdev_priv(netdev
);
3249 if (ti
->type
!= UDP_TUNNEL_TYPE_VXLAN
)
3252 idx
= nfp_net_find_vxlan_idx(nn
, ti
->port
);
3256 if (!nn
->vxlan_usecnt
[idx
]++)
3257 nfp_net_set_vxlan_port(nn
, idx
, ti
->port
);
3260 static void nfp_net_del_vxlan_port(struct net_device
*netdev
,
3261 struct udp_tunnel_info
*ti
)
3263 struct nfp_net
*nn
= netdev_priv(netdev
);
3266 if (ti
->type
!= UDP_TUNNEL_TYPE_VXLAN
)
3269 idx
= nfp_net_find_vxlan_idx(nn
, ti
->port
);
3270 if (idx
== -ENOSPC
|| !nn
->vxlan_usecnt
[idx
])
3273 if (!--nn
->vxlan_usecnt
[idx
])
3274 nfp_net_set_vxlan_port(nn
, idx
, 0);
3277 static int nfp_net_xdp_setup(struct nfp_net
*nn
, struct netdev_xdp
*xdp
)
3279 struct bpf_prog
*old_prog
= nn
->dp
.xdp_prog
;
3280 struct bpf_prog
*prog
= xdp
->prog
;
3281 struct nfp_net_dp
*dp
;
3284 if (!prog
&& !nn
->dp
.xdp_prog
)
3286 if (prog
&& nn
->dp
.xdp_prog
) {
3287 prog
= xchg(&nn
->dp
.xdp_prog
, prog
);
3289 nfp_app_xdp_offload(nn
->app
, nn
, nn
->dp
.xdp_prog
);
3293 dp
= nfp_net_clone_dp(nn
);
3297 dp
->xdp_prog
= prog
;
3298 dp
->num_tx_rings
+= prog
? nn
->dp
.num_rx_rings
: -nn
->dp
.num_rx_rings
;
3299 dp
->rx_dma_dir
= prog
? DMA_BIDIRECTIONAL
: DMA_FROM_DEVICE
;
3300 dp
->rx_dma_off
= prog
? XDP_PACKET_HEADROOM
- nn
->dp
.rx_offset
: 0;
3302 /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */
3303 err
= nfp_net_ring_reconfig(nn
, dp
, xdp
->extack
);
3308 bpf_prog_put(old_prog
);
3310 nfp_app_xdp_offload(nn
->app
, nn
, nn
->dp
.xdp_prog
);
3315 static int nfp_net_xdp(struct net_device
*netdev
, struct netdev_xdp
*xdp
)
3317 struct nfp_net
*nn
= netdev_priv(netdev
);
3319 switch (xdp
->command
) {
3320 case XDP_SETUP_PROG
:
3321 return nfp_net_xdp_setup(nn
, xdp
);
3322 case XDP_QUERY_PROG
:
3323 xdp
->prog_attached
= !!nn
->dp
.xdp_prog
;
3324 xdp
->prog_id
= nn
->dp
.xdp_prog
? nn
->dp
.xdp_prog
->aux
->id
: 0;
3331 static int nfp_net_set_mac_address(struct net_device
*netdev
, void *addr
)
3333 struct nfp_net
*nn
= netdev_priv(netdev
);
3334 struct sockaddr
*saddr
= addr
;
3337 err
= eth_prepare_mac_addr_change(netdev
, addr
);
3341 nfp_net_write_mac_addr(nn
, saddr
->sa_data
);
3343 err
= nfp_net_reconfig(nn
, NFP_NET_CFG_UPDATE_MACADDR
);
3347 eth_commit_mac_addr_change(netdev
, addr
);
3352 const struct net_device_ops nfp_net_netdev_ops
= {
3353 .ndo_open
= nfp_net_netdev_open
,
3354 .ndo_stop
= nfp_net_netdev_close
,
3355 .ndo_start_xmit
= nfp_net_tx
,
3356 .ndo_get_stats64
= nfp_net_stat64
,
3357 .ndo_vlan_rx_add_vid
= nfp_net_vlan_rx_add_vid
,
3358 .ndo_vlan_rx_kill_vid
= nfp_net_vlan_rx_kill_vid
,
3359 .ndo_setup_tc
= nfp_net_setup_tc
,
3360 .ndo_tx_timeout
= nfp_net_tx_timeout
,
3361 .ndo_set_rx_mode
= nfp_net_set_rx_mode
,
3362 .ndo_change_mtu
= nfp_net_change_mtu
,
3363 .ndo_set_mac_address
= nfp_net_set_mac_address
,
3364 .ndo_set_features
= nfp_net_set_features
,
3365 .ndo_features_check
= nfp_net_features_check
,
3366 .ndo_get_phys_port_name
= nfp_port_get_phys_port_name
,
3367 .ndo_udp_tunnel_add
= nfp_net_add_vxlan_port
,
3368 .ndo_udp_tunnel_del
= nfp_net_del_vxlan_port
,
3369 .ndo_xdp
= nfp_net_xdp
,
3373 * nfp_net_info() - Print general info about the NIC
3374 * @nn: NFP Net device to reconfigure
3376 void nfp_net_info(struct nfp_net
*nn
)
3378 nn_info(nn
, "Netronome NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
3379 nn
->dp
.is_vf
? "VF " : "",
3380 nn
->dp
.num_tx_rings
, nn
->max_tx_rings
,
3381 nn
->dp
.num_rx_rings
, nn
->max_rx_rings
);
3382 nn_info(nn
, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n",
3383 nn
->fw_ver
.resv
, nn
->fw_ver
.class,
3384 nn
->fw_ver
.major
, nn
->fw_ver
.minor
,
3386 nn_info(nn
, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
3388 nn
->cap
& NFP_NET_CFG_CTRL_PROMISC
? "PROMISC " : "",
3389 nn
->cap
& NFP_NET_CFG_CTRL_L2BC
? "L2BCFILT " : "",
3390 nn
->cap
& NFP_NET_CFG_CTRL_L2MC
? "L2MCFILT " : "",
3391 nn
->cap
& NFP_NET_CFG_CTRL_RXCSUM
? "RXCSUM " : "",
3392 nn
->cap
& NFP_NET_CFG_CTRL_TXCSUM
? "TXCSUM " : "",
3393 nn
->cap
& NFP_NET_CFG_CTRL_RXVLAN
? "RXVLAN " : "",
3394 nn
->cap
& NFP_NET_CFG_CTRL_TXVLAN
? "TXVLAN " : "",
3395 nn
->cap
& NFP_NET_CFG_CTRL_SCATTER
? "SCATTER " : "",
3396 nn
->cap
& NFP_NET_CFG_CTRL_GATHER
? "GATHER " : "",
3397 nn
->cap
& NFP_NET_CFG_CTRL_LSO
? "TSO1 " : "",
3398 nn
->cap
& NFP_NET_CFG_CTRL_LSO2
? "TSO2 " : "",
3399 nn
->cap
& NFP_NET_CFG_CTRL_RSS
? "RSS1 " : "",
3400 nn
->cap
& NFP_NET_CFG_CTRL_RSS2
? "RSS2 " : "",
3401 nn
->cap
& NFP_NET_CFG_CTRL_CTAG_FILTER
? "CTAG_FILTER " : "",
3402 nn
->cap
& NFP_NET_CFG_CTRL_L2SWITCH
? "L2SWITCH " : "",
3403 nn
->cap
& NFP_NET_CFG_CTRL_MSIXAUTO
? "AUTOMASK " : "",
3404 nn
->cap
& NFP_NET_CFG_CTRL_IRQMOD
? "IRQMOD " : "",
3405 nn
->cap
& NFP_NET_CFG_CTRL_VXLAN
? "VXLAN " : "",
3406 nn
->cap
& NFP_NET_CFG_CTRL_NVGRE
? "NVGRE " : "",
3407 nn
->cap
& NFP_NET_CFG_CTRL_CSUM_COMPLETE
?
3408 "RXCSUM_COMPLETE " : "",
3409 nn
->cap
& NFP_NET_CFG_CTRL_LIVE_ADDR
? "LIVE_ADDR " : "",
3410 nfp_app_extra_cap(nn
->app
, nn
));
3414 * nfp_net_alloc() - Allocate netdev and related structure
3416 * @needs_netdev: Whether to allocate a netdev for this vNIC
3417 * @max_tx_rings: Maximum number of TX rings supported by device
3418 * @max_rx_rings: Maximum number of RX rings supported by device
3420 * This function allocates a netdev device and fills in the initial
3421 * part of the @struct nfp_net structure. In case of control device
3422 * nfp_net structure is allocated without the netdev.
3424 * Return: NFP Net device structure, or ERR_PTR on error.
3426 struct nfp_net
*nfp_net_alloc(struct pci_dev
*pdev
, bool needs_netdev
,
3427 unsigned int max_tx_rings
,
3428 unsigned int max_rx_rings
)
3433 struct net_device
*netdev
;
3435 netdev
= alloc_etherdev_mqs(sizeof(struct nfp_net
),
3436 max_tx_rings
, max_rx_rings
);
3438 return ERR_PTR(-ENOMEM
);
3440 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
3441 nn
= netdev_priv(netdev
);
3442 nn
->dp
.netdev
= netdev
;
3444 nn
= vzalloc(sizeof(*nn
));
3446 return ERR_PTR(-ENOMEM
);
3449 nn
->dp
.dev
= &pdev
->dev
;
3452 nn
->max_tx_rings
= max_tx_rings
;
3453 nn
->max_rx_rings
= max_rx_rings
;
3455 nn
->dp
.num_tx_rings
= min_t(unsigned int,
3456 max_tx_rings
, num_online_cpus());
3457 nn
->dp
.num_rx_rings
= min_t(unsigned int, max_rx_rings
,
3458 netif_get_num_default_rss_queues());
3460 nn
->dp
.num_r_vecs
= max(nn
->dp
.num_tx_rings
, nn
->dp
.num_rx_rings
);
3461 nn
->dp
.num_r_vecs
= min_t(unsigned int,
3462 nn
->dp
.num_r_vecs
, num_online_cpus());
3464 nn
->dp
.txd_cnt
= NFP_NET_TX_DESCS_DEFAULT
;
3465 nn
->dp
.rxd_cnt
= NFP_NET_RX_DESCS_DEFAULT
;
3467 spin_lock_init(&nn
->reconfig_lock
);
3468 spin_lock_init(&nn
->link_status_lock
);
3470 setup_timer(&nn
->reconfig_timer
,
3471 nfp_net_reconfig_timer
, (unsigned long)nn
);
3477 * nfp_net_free() - Undo what @nfp_net_alloc() did
3478 * @nn: NFP Net device to reconfigure
3480 void nfp_net_free(struct nfp_net
*nn
)
3483 free_netdev(nn
->dp
.netdev
);
3489 * nfp_net_rss_key_sz() - Get current size of the RSS key
3490 * @nn: NFP Net device instance
3492 * Return: size of the RSS key for currently selected hash function.
3494 unsigned int nfp_net_rss_key_sz(struct nfp_net
*nn
)
3496 switch (nn
->rss_hfunc
) {
3497 case ETH_RSS_HASH_TOP
:
3498 return NFP_NET_CFG_RSS_KEY_SZ
;
3499 case ETH_RSS_HASH_XOR
:
3501 case ETH_RSS_HASH_CRC32
:
3505 nn_warn(nn
, "Unknown hash function: %u\n", nn
->rss_hfunc
);
3510 * nfp_net_rss_init() - Set the initial RSS parameters
3511 * @nn: NFP Net device to reconfigure
3513 static void nfp_net_rss_init(struct nfp_net
*nn
)
3515 unsigned long func_bit
, rss_cap_hfunc
;
3518 /* Read the RSS function capability and select first supported func */
3519 reg
= nn_readl(nn
, NFP_NET_CFG_RSS_CAP
);
3520 rss_cap_hfunc
= FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC
, reg
);
3522 rss_cap_hfunc
= FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC
,
3523 NFP_NET_CFG_RSS_TOEPLITZ
);
3525 func_bit
= find_first_bit(&rss_cap_hfunc
, NFP_NET_CFG_RSS_HFUNCS
);
3526 if (func_bit
== NFP_NET_CFG_RSS_HFUNCS
) {
3527 dev_warn(nn
->dp
.dev
,
3528 "Bad RSS config, defaulting to Toeplitz hash\n");
3529 func_bit
= ETH_RSS_HASH_TOP_BIT
;
3531 nn
->rss_hfunc
= 1 << func_bit
;
3533 netdev_rss_key_fill(nn
->rss_key
, nfp_net_rss_key_sz(nn
));
3535 nfp_net_rss_init_itbl(nn
);
3537 /* Enable IPv4/IPv6 TCP by default */
3538 nn
->rss_cfg
= NFP_NET_CFG_RSS_IPV4_TCP
|
3539 NFP_NET_CFG_RSS_IPV6_TCP
|
3540 FIELD_PREP(NFP_NET_CFG_RSS_HFUNC
, nn
->rss_hfunc
) |
3541 NFP_NET_CFG_RSS_MASK
;
3545 * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters
3546 * @nn: NFP Net device to reconfigure
3548 static void nfp_net_irqmod_init(struct nfp_net
*nn
)
3550 nn
->rx_coalesce_usecs
= 50;
3551 nn
->rx_coalesce_max_frames
= 64;
3552 nn
->tx_coalesce_usecs
= 50;
3553 nn
->tx_coalesce_max_frames
= 64;
3556 static void nfp_net_netdev_init(struct nfp_net
*nn
)
3558 struct net_device
*netdev
= nn
->dp
.netdev
;
3560 nfp_net_write_mac_addr(nn
, nn
->dp
.netdev
->dev_addr
);
3562 netdev
->mtu
= nn
->dp
.mtu
;
3564 /* Advertise/enable offloads based on capabilities
3566 * Note: netdev->features show the currently enabled features
3567 * and netdev->hw_features advertises which features are
3568 * supported. By default we enable most features.
3570 if (nn
->cap
& NFP_NET_CFG_CTRL_LIVE_ADDR
)
3571 netdev
->priv_flags
|= IFF_LIVE_ADDR_CHANGE
;
3573 netdev
->hw_features
= NETIF_F_HIGHDMA
;
3574 if (nn
->cap
& NFP_NET_CFG_CTRL_RXCSUM_ANY
) {
3575 netdev
->hw_features
|= NETIF_F_RXCSUM
;
3576 nn
->dp
.ctrl
|= nn
->cap
& NFP_NET_CFG_CTRL_RXCSUM_ANY
;
3578 if (nn
->cap
& NFP_NET_CFG_CTRL_TXCSUM
) {
3579 netdev
->hw_features
|= NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
;
3580 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_TXCSUM
;
3582 if (nn
->cap
& NFP_NET_CFG_CTRL_GATHER
) {
3583 netdev
->hw_features
|= NETIF_F_SG
;
3584 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_GATHER
;
3586 if ((nn
->cap
& NFP_NET_CFG_CTRL_LSO
&& nn
->fw_ver
.major
> 2) ||
3587 nn
->cap
& NFP_NET_CFG_CTRL_LSO2
) {
3588 netdev
->hw_features
|= NETIF_F_TSO
| NETIF_F_TSO6
;
3589 nn
->dp
.ctrl
|= nn
->cap
& NFP_NET_CFG_CTRL_LSO2
?:
3590 NFP_NET_CFG_CTRL_LSO
;
3592 if (nn
->cap
& NFP_NET_CFG_CTRL_RSS_ANY
)
3593 netdev
->hw_features
|= NETIF_F_RXHASH
;
3594 if (nn
->cap
& NFP_NET_CFG_CTRL_VXLAN
&&
3595 nn
->cap
& NFP_NET_CFG_CTRL_NVGRE
) {
3596 if (nn
->cap
& NFP_NET_CFG_CTRL_LSO
)
3597 netdev
->hw_features
|= NETIF_F_GSO_GRE
|
3598 NETIF_F_GSO_UDP_TUNNEL
;
3599 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_VXLAN
| NFP_NET_CFG_CTRL_NVGRE
;
3601 netdev
->hw_enc_features
= netdev
->hw_features
;
3604 netdev
->vlan_features
= netdev
->hw_features
;
3606 if (nn
->cap
& NFP_NET_CFG_CTRL_RXVLAN
) {
3607 netdev
->hw_features
|= NETIF_F_HW_VLAN_CTAG_RX
;
3608 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_RXVLAN
;
3610 if (nn
->cap
& NFP_NET_CFG_CTRL_TXVLAN
) {
3611 if (nn
->cap
& NFP_NET_CFG_CTRL_LSO2
) {
3612 nn_warn(nn
, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
3614 netdev
->hw_features
|= NETIF_F_HW_VLAN_CTAG_TX
;
3615 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_TXVLAN
;
3618 if (nn
->cap
& NFP_NET_CFG_CTRL_CTAG_FILTER
) {
3619 netdev
->hw_features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
3620 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_CTAG_FILTER
;
3623 netdev
->features
= netdev
->hw_features
;
3625 if (nfp_app_has_tc(nn
->app
))
3626 netdev
->hw_features
|= NETIF_F_HW_TC
;
3628 /* Advertise but disable TSO by default. */
3629 netdev
->features
&= ~(NETIF_F_TSO
| NETIF_F_TSO6
);
3630 nn
->dp
.ctrl
&= ~NFP_NET_CFG_CTRL_LSO_ANY
;
3632 /* Finalise the netdev setup */
3633 netdev
->netdev_ops
= &nfp_net_netdev_ops
;
3634 netdev
->watchdog_timeo
= msecs_to_jiffies(5 * 1000);
3636 /* MTU range: 68 - hw-specific max */
3637 netdev
->min_mtu
= ETH_MIN_MTU
;
3638 netdev
->max_mtu
= nn
->max_mtu
;
3640 netif_carrier_off(netdev
);
3642 nfp_net_set_ethtool_ops(netdev
);
3646 * nfp_net_init() - Initialise/finalise the nfp_net structure
3647 * @nn: NFP Net device structure
3649 * Return: 0 on success or negative errno on error.
3651 int nfp_net_init(struct nfp_net
*nn
)
3655 nn
->dp
.rx_dma_dir
= DMA_FROM_DEVICE
;
3657 /* Get some of the read-only fields from the BAR */
3658 nn
->cap
= nn_readl(nn
, NFP_NET_CFG_CAP
);
3659 nn
->max_mtu
= nn_readl(nn
, NFP_NET_CFG_MAX_MTU
);
3661 /* Chained metadata is signalled by capabilities except in version 4 */
3662 nn
->dp
.chained_metadata_format
= nn
->fw_ver
.major
== 4 ||
3664 nn
->cap
& NFP_NET_CFG_CTRL_CHAIN_META
;
3665 if (nn
->dp
.chained_metadata_format
&& nn
->fw_ver
.major
!= 4)
3666 nn
->cap
&= ~NFP_NET_CFG_CTRL_RSS
;
3668 /* Determine RX packet/metadata boundary offset */
3669 if (nn
->fw_ver
.major
>= 2) {
3672 reg
= nn_readl(nn
, NFP_NET_CFG_RX_OFFSET
);
3673 if (reg
> NFP_NET_MAX_PREPEND
) {
3674 nn_err(nn
, "Invalid rx offset: %d\n", reg
);
3677 nn
->dp
.rx_offset
= reg
;
3679 nn
->dp
.rx_offset
= NFP_NET_RX_OFFSET
;
3682 /* Set default MTU and Freelist buffer size */
3683 if (nn
->max_mtu
< NFP_NET_DEFAULT_MTU
)
3684 nn
->dp
.mtu
= nn
->max_mtu
;
3686 nn
->dp
.mtu
= NFP_NET_DEFAULT_MTU
;
3687 nn
->dp
.fl_bufsz
= nfp_net_calc_fl_bufsz(&nn
->dp
);
3689 if (nn
->cap
& NFP_NET_CFG_CTRL_RSS_ANY
) {
3690 nfp_net_rss_init(nn
);
3691 nn
->dp
.ctrl
|= nn
->cap
& NFP_NET_CFG_CTRL_RSS2
?:
3692 NFP_NET_CFG_CTRL_RSS
;
3695 /* Allow L2 Broadcast and Multicast through by default, if supported */
3696 if (nn
->cap
& NFP_NET_CFG_CTRL_L2BC
)
3697 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_L2BC
;
3698 if (nn
->cap
& NFP_NET_CFG_CTRL_L2MC
)
3699 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_L2MC
;
3701 /* Allow IRQ moderation, if supported */
3702 if (nn
->cap
& NFP_NET_CFG_CTRL_IRQMOD
) {
3703 nfp_net_irqmod_init(nn
);
3704 nn
->dp
.ctrl
|= NFP_NET_CFG_CTRL_IRQMOD
;
3708 nfp_net_netdev_init(nn
);
3710 /* Stash the re-configuration queue away. First odd queue in TX Bar */
3711 nn
->qcp_cfg
= nn
->tx_bar
+ NFP_QCP_QUEUE_ADDR_SZ
;
3713 /* Make sure the FW knows the netdev is supposed to be disabled here */
3714 nn_writel(nn
, NFP_NET_CFG_CTRL
, 0);
3715 nn_writeq(nn
, NFP_NET_CFG_TXRS_ENABLE
, 0);
3716 nn_writeq(nn
, NFP_NET_CFG_RXRS_ENABLE
, 0);
3717 err
= nfp_net_reconfig(nn
, NFP_NET_CFG_UPDATE_RING
|
3718 NFP_NET_CFG_UPDATE_GEN
);
3722 nfp_net_vecs_init(nn
);
3726 return register_netdev(nn
->dp
.netdev
);
3730 * nfp_net_clean() - Undo what nfp_net_init() did.
3731 * @nn: NFP Net device structure
3733 void nfp_net_clean(struct nfp_net
*nn
)
3738 unregister_netdev(nn
->dp
.netdev
);
3740 if (nn
->dp
.xdp_prog
)
3741 bpf_prog_put(nn
->dp
.xdp_prog
);