2 * This file is part of the Chelsio T4 PCI-E SR-IOV Virtual Function Ethernet
5 * Copyright (c) 2009-2010 Chelsio Communications, Inc. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
38 #include <linux/module.h>
39 #include <linux/moduleparam.h>
40 #include <linux/init.h>
41 #include <linux/pci.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/netdevice.h>
44 #include <linux/etherdevice.h>
45 #include <linux/debugfs.h>
46 #include <linux/ethtool.h>
48 #include "t4vf_common.h"
49 #include "t4vf_defs.h"
51 #include "../cxgb4/t4_regs.h"
52 #include "../cxgb4/t4_msg.h"
55 * Generic information about the driver.
57 #define DRV_VERSION "2.0.0-ko"
58 #define DRV_DESC "Chelsio T4/T5 Virtual Function (VF) Network Driver"
66 * Default ethtool "message level" for adapters.
68 #define DFLT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
69 NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP |\
70 NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
72 static int dflt_msg_enable
= DFLT_MSG_ENABLE
;
74 module_param(dflt_msg_enable
, int, 0644);
75 MODULE_PARM_DESC(dflt_msg_enable
,
76 "default adapter ethtool message level bitmap");
79 * The driver uses the best interrupt scheme available on a platform in the
80 * order MSI-X then MSI. This parameter determines which of these schemes the
81 * driver may consider as follows:
83 * msi = 2: choose from among MSI-X and MSI
84 * msi = 1: only consider MSI interrupts
86 * Note that unlike the Physical Function driver, this Virtual Function driver
87 * does _not_ support legacy INTx interrupts (this limitation is mandated by
88 * the PCI-E SR-IOV standard).
92 #define MSI_DEFAULT MSI_MSIX
94 static int msi
= MSI_DEFAULT
;
96 module_param(msi
, int, 0644);
97 MODULE_PARM_DESC(msi
, "whether to use MSI-X or MSI");
100 * Fundamental constants.
101 * ======================
105 MAX_TXQ_ENTRIES
= 16384,
106 MAX_RSPQ_ENTRIES
= 16384,
107 MAX_RX_BUFFERS
= 16384,
109 MIN_TXQ_ENTRIES
= 32,
110 MIN_RSPQ_ENTRIES
= 128,
114 * For purposes of manipulating the Free List size we need to
115 * recognize that Free Lists are actually Egress Queues (the host
116 * produces free buffers which the hardware consumes), Egress Queues
117 * indices are all in units of Egress Context Units bytes, and free
118 * list entries are 64-bit PCI DMA addresses. And since the state of
119 * the Producer Index == the Consumer Index implies an EMPTY list, we
120 * always have at least one Egress Unit's worth of Free List entries
121 * unused. See sge.c for more details ...
123 EQ_UNIT
= SGE_EQ_IDXSIZE
,
124 FL_PER_EQ_UNIT
= EQ_UNIT
/ sizeof(__be64
),
125 MIN_FL_RESID
= FL_PER_EQ_UNIT
,
129 * Global driver state.
130 * ====================
133 static struct dentry
*cxgb4vf_debugfs_root
;
136 * OS "Callback" functions.
137 * ========================
141 * The link status has changed on the indicated "port" (Virtual Interface).
143 void t4vf_os_link_changed(struct adapter
*adapter
, int pidx
, int link_ok
)
145 struct net_device
*dev
= adapter
->port
[pidx
];
148 * If the port is disabled or the current recorded "link up"
149 * status matches the new status, just return.
151 if (!netif_running(dev
) || link_ok
== netif_carrier_ok(dev
))
155 * Tell the OS that the link status has changed and print a short
156 * informative message on the console about the event.
161 const struct port_info
*pi
= netdev_priv(dev
);
163 netif_carrier_on(dev
);
165 switch (pi
->link_cfg
.speed
) {
187 switch (pi
->link_cfg
.fc
) {
196 case PAUSE_RX
|PAUSE_TX
:
205 netdev_info(dev
, "link up, %s, full-duplex, %s PAUSE\n", s
, fc
);
207 netif_carrier_off(dev
);
208 netdev_info(dev
, "link down\n");
213 * Net device operations.
214 * ======================
221 * Perform the MAC and PHY actions needed to enable a "port" (Virtual
224 static int link_start(struct net_device
*dev
)
227 struct port_info
*pi
= netdev_priv(dev
);
230 * We do not set address filters and promiscuity here, the stack does
231 * that step explicitly. Enable vlan accel.
233 ret
= t4vf_set_rxmode(pi
->adapter
, pi
->viid
, dev
->mtu
, -1, -1, -1, 1,
236 ret
= t4vf_change_mac(pi
->adapter
, pi
->viid
,
237 pi
->xact_addr_filt
, dev
->dev_addr
, true);
239 pi
->xact_addr_filt
= ret
;
245 * We don't need to actually "start the link" itself since the
246 * firmware will do that for us when the first Virtual Interface
247 * is enabled on a port.
250 ret
= t4vf_enable_vi(pi
->adapter
, pi
->viid
, true, true);
255 * Name the MSI-X interrupts.
257 static void name_msix_vecs(struct adapter
*adapter
)
259 int namelen
= sizeof(adapter
->msix_info
[0].desc
) - 1;
265 snprintf(adapter
->msix_info
[MSIX_FW
].desc
, namelen
,
266 "%s-FWeventq", adapter
->name
);
267 adapter
->msix_info
[MSIX_FW
].desc
[namelen
] = 0;
272 for_each_port(adapter
, pidx
) {
273 struct net_device
*dev
= adapter
->port
[pidx
];
274 const struct port_info
*pi
= netdev_priv(dev
);
277 for (qs
= 0, msi
= MSIX_IQFLINT
; qs
< pi
->nqsets
; qs
++, msi
++) {
278 snprintf(adapter
->msix_info
[msi
].desc
, namelen
,
279 "%s-%d", dev
->name
, qs
);
280 adapter
->msix_info
[msi
].desc
[namelen
] = 0;
286 * Request all of our MSI-X resources.
288 static int request_msix_queue_irqs(struct adapter
*adapter
)
290 struct sge
*s
= &adapter
->sge
;
296 err
= request_irq(adapter
->msix_info
[MSIX_FW
].vec
, t4vf_sge_intr_msix
,
297 0, adapter
->msix_info
[MSIX_FW
].desc
, &s
->fw_evtq
);
305 for_each_ethrxq(s
, rxq
) {
306 err
= request_irq(adapter
->msix_info
[msi
].vec
,
307 t4vf_sge_intr_msix
, 0,
308 adapter
->msix_info
[msi
].desc
,
309 &s
->ethrxq
[rxq
].rspq
);
318 free_irq(adapter
->msix_info
[--msi
].vec
, &s
->ethrxq
[rxq
].rspq
);
319 free_irq(adapter
->msix_info
[MSIX_FW
].vec
, &s
->fw_evtq
);
324 * Free our MSI-X resources.
326 static void free_msix_queue_irqs(struct adapter
*adapter
)
328 struct sge
*s
= &adapter
->sge
;
331 free_irq(adapter
->msix_info
[MSIX_FW
].vec
, &s
->fw_evtq
);
333 for_each_ethrxq(s
, rxq
)
334 free_irq(adapter
->msix_info
[msi
++].vec
,
335 &s
->ethrxq
[rxq
].rspq
);
339 * Turn on NAPI and start up interrupts on a response queue.
341 static void qenable(struct sge_rspq
*rspq
)
343 napi_enable(&rspq
->napi
);
346 * 0-increment the Going To Sleep register to start the timer and
349 t4_write_reg(rspq
->adapter
, T4VF_SGE_BASE_ADDR
+ SGE_VF_GTS
,
351 SEINTARM(rspq
->intr_params
) |
352 INGRESSQID(rspq
->cntxt_id
));
356 * Enable NAPI scheduling and interrupt generation for all Receive Queues.
358 static void enable_rx(struct adapter
*adapter
)
361 struct sge
*s
= &adapter
->sge
;
363 for_each_ethrxq(s
, rxq
)
364 qenable(&s
->ethrxq
[rxq
].rspq
);
365 qenable(&s
->fw_evtq
);
368 * The interrupt queue doesn't use NAPI so we do the 0-increment of
369 * its Going To Sleep register here to get it started.
371 if (adapter
->flags
& USING_MSI
)
372 t4_write_reg(adapter
, T4VF_SGE_BASE_ADDR
+ SGE_VF_GTS
,
374 SEINTARM(s
->intrq
.intr_params
) |
375 INGRESSQID(s
->intrq
.cntxt_id
));
380 * Wait until all NAPI handlers are descheduled.
382 static void quiesce_rx(struct adapter
*adapter
)
384 struct sge
*s
= &adapter
->sge
;
387 for_each_ethrxq(s
, rxq
)
388 napi_disable(&s
->ethrxq
[rxq
].rspq
.napi
);
389 napi_disable(&s
->fw_evtq
.napi
);
393 * Response queue handler for the firmware event queue.
395 static int fwevtq_handler(struct sge_rspq
*rspq
, const __be64
*rsp
,
396 const struct pkt_gl
*gl
)
399 * Extract response opcode and get pointer to CPL message body.
401 struct adapter
*adapter
= rspq
->adapter
;
402 u8 opcode
= ((const struct rss_header
*)rsp
)->opcode
;
403 void *cpl
= (void *)(rsp
+ 1);
408 * We've received an asynchronous message from the firmware.
410 const struct cpl_fw6_msg
*fw_msg
= cpl
;
411 if (fw_msg
->type
== FW6_TYPE_CMD_RPL
)
412 t4vf_handle_fw_rpl(adapter
, fw_msg
->data
);
417 /* FW can send EGR_UPDATEs encapsulated in a CPL_FW4_MSG.
419 const struct cpl_sge_egr_update
*p
= (void *)(rsp
+ 3);
420 opcode
= G_CPL_OPCODE(ntohl(p
->opcode_qid
));
421 if (opcode
!= CPL_SGE_EGR_UPDATE
) {
422 dev_err(adapter
->pdev_dev
, "unexpected FW4/CPL %#x on FW event queue\n"
430 case CPL_SGE_EGR_UPDATE
: {
432 * We've received an Egress Queue Status Update message. We
433 * get these, if the SGE is configured to send these when the
434 * firmware passes certain points in processing our TX
435 * Ethernet Queue or if we make an explicit request for one.
436 * We use these updates to determine when we may need to
437 * restart a TX Ethernet Queue which was stopped for lack of
438 * free TX Queue Descriptors ...
440 const struct cpl_sge_egr_update
*p
= cpl
;
441 unsigned int qid
= EGR_QID(be32_to_cpu(p
->opcode_qid
));
442 struct sge
*s
= &adapter
->sge
;
444 struct sge_eth_txq
*txq
;
448 * Perform sanity checking on the Queue ID to make sure it
449 * really refers to one of our TX Ethernet Egress Queues which
450 * is active and matches the queue's ID. None of these error
451 * conditions should ever happen so we may want to either make
452 * them fatal and/or conditionalized under DEBUG.
454 eq_idx
= EQ_IDX(s
, qid
);
455 if (unlikely(eq_idx
>= MAX_EGRQ
)) {
456 dev_err(adapter
->pdev_dev
,
457 "Egress Update QID %d out of range\n", qid
);
460 tq
= s
->egr_map
[eq_idx
];
461 if (unlikely(tq
== NULL
)) {
462 dev_err(adapter
->pdev_dev
,
463 "Egress Update QID %d TXQ=NULL\n", qid
);
466 txq
= container_of(tq
, struct sge_eth_txq
, q
);
467 if (unlikely(tq
->abs_id
!= qid
)) {
468 dev_err(adapter
->pdev_dev
,
469 "Egress Update QID %d refers to TXQ %d\n",
475 * Restart a stopped TX Queue which has less than half of its
479 netif_tx_wake_queue(txq
->txq
);
484 dev_err(adapter
->pdev_dev
,
485 "unexpected CPL %#x on FW event queue\n", opcode
);
492 * Allocate SGE TX/RX response queues. Determine how many sets of SGE queues
493 * to use and initializes them. We support multiple "Queue Sets" per port if
494 * we have MSI-X, otherwise just one queue set per port.
496 static int setup_sge_queues(struct adapter
*adapter
)
498 struct sge
*s
= &adapter
->sge
;
502 * Clear "Queue Set" Free List Starving and TX Queue Mapping Error
505 bitmap_zero(s
->starving_fl
, MAX_EGRQ
);
508 * If we're using MSI interrupt mode we need to set up a "forwarded
509 * interrupt" queue which we'll set up with our MSI vector. The rest
510 * of the ingress queues will be set up to forward their interrupts to
511 * this queue ... This must be first since t4vf_sge_alloc_rxq() uses
512 * the intrq's queue ID as the interrupt forwarding queue for the
513 * subsequent calls ...
515 if (adapter
->flags
& USING_MSI
) {
516 err
= t4vf_sge_alloc_rxq(adapter
, &s
->intrq
, false,
517 adapter
->port
[0], 0, NULL
, NULL
);
519 goto err_free_queues
;
523 * Allocate our ingress queue for asynchronous firmware messages.
525 err
= t4vf_sge_alloc_rxq(adapter
, &s
->fw_evtq
, true, adapter
->port
[0],
526 MSIX_FW
, NULL
, fwevtq_handler
);
528 goto err_free_queues
;
531 * Allocate each "port"'s initial Queue Sets. These can be changed
532 * later on ... up to the point where any interface on the adapter is
533 * brought up at which point lots of things get nailed down
537 for_each_port(adapter
, pidx
) {
538 struct net_device
*dev
= adapter
->port
[pidx
];
539 struct port_info
*pi
= netdev_priv(dev
);
540 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[pi
->first_qset
];
541 struct sge_eth_txq
*txq
= &s
->ethtxq
[pi
->first_qset
];
544 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
545 err
= t4vf_sge_alloc_rxq(adapter
, &rxq
->rspq
, false,
547 &rxq
->fl
, t4vf_ethrx_handler
);
549 goto err_free_queues
;
551 err
= t4vf_sge_alloc_eth_txq(adapter
, txq
, dev
,
552 netdev_get_tx_queue(dev
, qs
),
553 s
->fw_evtq
.cntxt_id
);
555 goto err_free_queues
;
558 memset(&rxq
->stats
, 0, sizeof(rxq
->stats
));
563 * Create the reverse mappings for the queues.
565 s
->egr_base
= s
->ethtxq
[0].q
.abs_id
- s
->ethtxq
[0].q
.cntxt_id
;
566 s
->ingr_base
= s
->ethrxq
[0].rspq
.abs_id
- s
->ethrxq
[0].rspq
.cntxt_id
;
567 IQ_MAP(s
, s
->fw_evtq
.abs_id
) = &s
->fw_evtq
;
568 for_each_port(adapter
, pidx
) {
569 struct net_device
*dev
= adapter
->port
[pidx
];
570 struct port_info
*pi
= netdev_priv(dev
);
571 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[pi
->first_qset
];
572 struct sge_eth_txq
*txq
= &s
->ethtxq
[pi
->first_qset
];
575 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
576 IQ_MAP(s
, rxq
->rspq
.abs_id
) = &rxq
->rspq
;
577 EQ_MAP(s
, txq
->q
.abs_id
) = &txq
->q
;
580 * The FW_IQ_CMD doesn't return the Absolute Queue IDs
581 * for Free Lists but since all of the Egress Queues
582 * (including Free Lists) have Relative Queue IDs
583 * which are computed as Absolute - Base Queue ID, we
584 * can synthesize the Absolute Queue IDs for the Free
585 * Lists. This is useful for debugging purposes when
586 * we want to dump Queue Contexts via the PF Driver.
588 rxq
->fl
.abs_id
= rxq
->fl
.cntxt_id
+ s
->egr_base
;
589 EQ_MAP(s
, rxq
->fl
.abs_id
) = &rxq
->fl
;
595 t4vf_free_sge_resources(adapter
);
600 * Set up Receive Side Scaling (RSS) to distribute packets to multiple receive
601 * queues. We configure the RSS CPU lookup table to distribute to the number
602 * of HW receive queues, and the response queue lookup table to narrow that
603 * down to the response queues actually configured for each "port" (Virtual
604 * Interface). We always configure the RSS mapping for all ports since the
605 * mapping table has plenty of entries.
607 static int setup_rss(struct adapter
*adapter
)
611 for_each_port(adapter
, pidx
) {
612 struct port_info
*pi
= adap2pinfo(adapter
, pidx
);
613 struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
614 u16 rss
[MAX_PORT_QSETS
];
617 for (qs
= 0; qs
< pi
->nqsets
; qs
++)
618 rss
[qs
] = rxq
[qs
].rspq
.abs_id
;
620 err
= t4vf_config_rss_range(adapter
, pi
->viid
,
621 0, pi
->rss_size
, rss
, pi
->nqsets
);
626 * Perform Global RSS Mode-specific initialization.
628 switch (adapter
->params
.rss
.mode
) {
629 case FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL
:
631 * If Tunnel All Lookup isn't specified in the global
632 * RSS Configuration, then we need to specify a
633 * default Ingress Queue for any ingress packets which
634 * aren't hashed. We'll use our first ingress queue
637 if (!adapter
->params
.rss
.u
.basicvirtual
.tnlalllookup
) {
638 union rss_vi_config config
;
639 err
= t4vf_read_rss_vi_config(adapter
,
644 config
.basicvirtual
.defaultq
=
646 err
= t4vf_write_rss_vi_config(adapter
,
660 * Bring the adapter up. Called whenever we go from no "ports" open to having
661 * one open. This function performs the actions necessary to make an adapter
662 * operational, such as completing the initialization of HW modules, and
663 * enabling interrupts. Must be called with the rtnl lock held. (Note that
664 * this is called "cxgb_up" in the PF Driver.)
666 static int adapter_up(struct adapter
*adapter
)
671 * If this is the first time we've been called, perform basic
672 * adapter setup. Once we've done this, many of our adapter
673 * parameters can no longer be changed ...
675 if ((adapter
->flags
& FULL_INIT_DONE
) == 0) {
676 err
= setup_sge_queues(adapter
);
679 err
= setup_rss(adapter
);
681 t4vf_free_sge_resources(adapter
);
685 if (adapter
->flags
& USING_MSIX
)
686 name_msix_vecs(adapter
);
687 adapter
->flags
|= FULL_INIT_DONE
;
691 * Acquire our interrupt resources. We only support MSI-X and MSI.
693 BUG_ON((adapter
->flags
& (USING_MSIX
|USING_MSI
)) == 0);
694 if (adapter
->flags
& USING_MSIX
)
695 err
= request_msix_queue_irqs(adapter
);
697 err
= request_irq(adapter
->pdev
->irq
,
698 t4vf_intr_handler(adapter
), 0,
699 adapter
->name
, adapter
);
701 dev_err(adapter
->pdev_dev
, "request_irq failed, err %d\n",
707 * Enable NAPI ingress processing and return success.
710 t4vf_sge_start(adapter
);
715 * Bring the adapter down. Called whenever the last "port" (Virtual
716 * Interface) closed. (Note that this routine is called "cxgb_down" in the PF
719 static void adapter_down(struct adapter
*adapter
)
722 * Free interrupt resources.
724 if (adapter
->flags
& USING_MSIX
)
725 free_msix_queue_irqs(adapter
);
727 free_irq(adapter
->pdev
->irq
, adapter
);
730 * Wait for NAPI handlers to finish.
736 * Start up a net device.
738 static int cxgb4vf_open(struct net_device
*dev
)
741 struct port_info
*pi
= netdev_priv(dev
);
742 struct adapter
*adapter
= pi
->adapter
;
745 * If this is the first interface that we're opening on the "adapter",
746 * bring the "adapter" up now.
748 if (adapter
->open_device_map
== 0) {
749 err
= adapter_up(adapter
);
755 * Note that this interface is up and start everything up ...
757 netif_set_real_num_tx_queues(dev
, pi
->nqsets
);
758 err
= netif_set_real_num_rx_queues(dev
, pi
->nqsets
);
761 err
= link_start(dev
);
765 netif_tx_start_all_queues(dev
);
766 set_bit(pi
->port_id
, &adapter
->open_device_map
);
770 if (adapter
->open_device_map
== 0)
771 adapter_down(adapter
);
776 * Shut down a net device. This routine is called "cxgb_close" in the PF
779 static int cxgb4vf_stop(struct net_device
*dev
)
781 struct port_info
*pi
= netdev_priv(dev
);
782 struct adapter
*adapter
= pi
->adapter
;
784 netif_tx_stop_all_queues(dev
);
785 netif_carrier_off(dev
);
786 t4vf_enable_vi(adapter
, pi
->viid
, false, false);
787 pi
->link_cfg
.link_ok
= 0;
789 clear_bit(pi
->port_id
, &adapter
->open_device_map
);
790 if (adapter
->open_device_map
== 0)
791 adapter_down(adapter
);
796 * Translate our basic statistics into the standard "ifconfig" statistics.
798 static struct net_device_stats
*cxgb4vf_get_stats(struct net_device
*dev
)
800 struct t4vf_port_stats stats
;
801 struct port_info
*pi
= netdev2pinfo(dev
);
802 struct adapter
*adapter
= pi
->adapter
;
803 struct net_device_stats
*ns
= &dev
->stats
;
806 spin_lock(&adapter
->stats_lock
);
807 err
= t4vf_get_port_stats(adapter
, pi
->pidx
, &stats
);
808 spin_unlock(&adapter
->stats_lock
);
810 memset(ns
, 0, sizeof(*ns
));
814 ns
->tx_bytes
= (stats
.tx_bcast_bytes
+ stats
.tx_mcast_bytes
+
815 stats
.tx_ucast_bytes
+ stats
.tx_offload_bytes
);
816 ns
->tx_packets
= (stats
.tx_bcast_frames
+ stats
.tx_mcast_frames
+
817 stats
.tx_ucast_frames
+ stats
.tx_offload_frames
);
818 ns
->rx_bytes
= (stats
.rx_bcast_bytes
+ stats
.rx_mcast_bytes
+
819 stats
.rx_ucast_bytes
);
820 ns
->rx_packets
= (stats
.rx_bcast_frames
+ stats
.rx_mcast_frames
+
821 stats
.rx_ucast_frames
);
822 ns
->multicast
= stats
.rx_mcast_frames
;
823 ns
->tx_errors
= stats
.tx_drop_frames
;
824 ns
->rx_errors
= stats
.rx_err_frames
;
830 * Collect up to maxaddrs worth of a netdevice's unicast addresses, starting
831 * at a specified offset within the list, into an array of addrss pointers and
832 * return the number collected.
834 static inline unsigned int collect_netdev_uc_list_addrs(const struct net_device
*dev
,
837 unsigned int maxaddrs
)
839 unsigned int index
= 0;
840 unsigned int naddr
= 0;
841 const struct netdev_hw_addr
*ha
;
843 for_each_dev_addr(dev
, ha
)
844 if (index
++ >= offset
) {
845 addr
[naddr
++] = ha
->addr
;
846 if (naddr
>= maxaddrs
)
853 * Collect up to maxaddrs worth of a netdevice's multicast addresses, starting
854 * at a specified offset within the list, into an array of addrss pointers and
855 * return the number collected.
857 static inline unsigned int collect_netdev_mc_list_addrs(const struct net_device
*dev
,
860 unsigned int maxaddrs
)
862 unsigned int index
= 0;
863 unsigned int naddr
= 0;
864 const struct netdev_hw_addr
*ha
;
866 netdev_for_each_mc_addr(ha
, dev
)
867 if (index
++ >= offset
) {
868 addr
[naddr
++] = ha
->addr
;
869 if (naddr
>= maxaddrs
)
876 * Configure the exact and hash address filters to handle a port's multicast
877 * and secondary unicast MAC addresses.
879 static int set_addr_filters(const struct net_device
*dev
, bool sleep
)
884 unsigned int offset
, naddr
;
887 const struct port_info
*pi
= netdev_priv(dev
);
889 /* first do the secondary unicast addresses */
890 for (offset
= 0; ; offset
+= naddr
) {
891 naddr
= collect_netdev_uc_list_addrs(dev
, addr
, offset
,
896 ret
= t4vf_alloc_mac_filt(pi
->adapter
, pi
->viid
, free
,
897 naddr
, addr
, NULL
, &uhash
, sleep
);
904 /* next set up the multicast addresses */
905 for (offset
= 0; ; offset
+= naddr
) {
906 naddr
= collect_netdev_mc_list_addrs(dev
, addr
, offset
,
911 ret
= t4vf_alloc_mac_filt(pi
->adapter
, pi
->viid
, free
,
912 naddr
, addr
, NULL
, &mhash
, sleep
);
918 return t4vf_set_addr_hash(pi
->adapter
, pi
->viid
, uhash
!= 0,
919 uhash
| mhash
, sleep
);
923 * Set RX properties of a port, such as promiscruity, address filters, and MTU.
924 * If @mtu is -1 it is left unchanged.
926 static int set_rxmode(struct net_device
*dev
, int mtu
, bool sleep_ok
)
929 struct port_info
*pi
= netdev_priv(dev
);
931 ret
= set_addr_filters(dev
, sleep_ok
);
933 ret
= t4vf_set_rxmode(pi
->adapter
, pi
->viid
, -1,
934 (dev
->flags
& IFF_PROMISC
) != 0,
935 (dev
->flags
& IFF_ALLMULTI
) != 0,
941 * Set the current receive modes on the device.
943 static void cxgb4vf_set_rxmode(struct net_device
*dev
)
945 /* unfortunately we can't return errors to the stack */
946 set_rxmode(dev
, -1, false);
950 * Find the entry in the interrupt holdoff timer value array which comes
951 * closest to the specified interrupt holdoff value.
953 static int closest_timer(const struct sge
*s
, int us
)
955 int i
, timer_idx
= 0, min_delta
= INT_MAX
;
957 for (i
= 0; i
< ARRAY_SIZE(s
->timer_val
); i
++) {
958 int delta
= us
- s
->timer_val
[i
];
961 if (delta
< min_delta
) {
969 static int closest_thres(const struct sge
*s
, int thres
)
971 int i
, delta
, pktcnt_idx
= 0, min_delta
= INT_MAX
;
973 for (i
= 0; i
< ARRAY_SIZE(s
->counter_val
); i
++) {
974 delta
= thres
- s
->counter_val
[i
];
977 if (delta
< min_delta
) {
986 * Return a queue's interrupt hold-off time in us. 0 means no timer.
988 static unsigned int qtimer_val(const struct adapter
*adapter
,
989 const struct sge_rspq
*rspq
)
991 unsigned int timer_idx
= QINTR_TIMER_IDX_GET(rspq
->intr_params
);
993 return timer_idx
< SGE_NTIMERS
994 ? adapter
->sge
.timer_val
[timer_idx
]
999 * set_rxq_intr_params - set a queue's interrupt holdoff parameters
1000 * @adapter: the adapter
1001 * @rspq: the RX response queue
1002 * @us: the hold-off time in us, or 0 to disable timer
1003 * @cnt: the hold-off packet count, or 0 to disable counter
1005 * Sets an RX response queue's interrupt hold-off time and packet count.
1006 * At least one of the two needs to be enabled for the queue to generate
1009 static int set_rxq_intr_params(struct adapter
*adapter
, struct sge_rspq
*rspq
,
1010 unsigned int us
, unsigned int cnt
)
1012 unsigned int timer_idx
;
1015 * If both the interrupt holdoff timer and count are specified as
1016 * zero, default to a holdoff count of 1 ...
1018 if ((us
| cnt
) == 0)
1022 * If an interrupt holdoff count has been specified, then find the
1023 * closest configured holdoff count and use that. If the response
1024 * queue has already been created, then update its queue context
1031 pktcnt_idx
= closest_thres(&adapter
->sge
, cnt
);
1032 if (rspq
->desc
&& rspq
->pktcnt_idx
!= pktcnt_idx
) {
1033 v
= FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DMAQ
) |
1034 FW_PARAMS_PARAM_X_V(
1035 FW_PARAMS_PARAM_DMAQ_IQ_INTCNTTHRESH
) |
1036 FW_PARAMS_PARAM_YZ_V(rspq
->cntxt_id
);
1037 err
= t4vf_set_params(adapter
, 1, &v
, &pktcnt_idx
);
1041 rspq
->pktcnt_idx
= pktcnt_idx
;
1045 * Compute the closest holdoff timer index from the supplied holdoff
1048 timer_idx
= (us
== 0
1049 ? SGE_TIMER_RSTRT_CNTR
1050 : closest_timer(&adapter
->sge
, us
));
1053 * Update the response queue's interrupt coalescing parameters and
1056 rspq
->intr_params
= (QINTR_TIMER_IDX(timer_idx
) |
1057 (cnt
> 0 ? QINTR_CNT_EN
: 0));
1062 * Return a version number to identify the type of adapter. The scheme is:
1063 * - bits 0..9: chip version
1064 * - bits 10..15: chip revision
1066 static inline unsigned int mk_adap_vers(const struct adapter
*adapter
)
1069 * Chip version 4, revision 0x3f (cxgb4vf).
1071 return CHELSIO_CHIP_VERSION(adapter
->params
.chip
) | (0x3f << 10);
1075 * Execute the specified ioctl command.
1077 static int cxgb4vf_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
1083 * The VF Driver doesn't have access to any of the other
1084 * common Ethernet device ioctl()'s (like reading/writing
1085 * PHY registers, etc.
1096 * Change the device's MTU.
1098 static int cxgb4vf_change_mtu(struct net_device
*dev
, int new_mtu
)
1101 struct port_info
*pi
= netdev_priv(dev
);
1103 /* accommodate SACK */
1107 ret
= t4vf_set_rxmode(pi
->adapter
, pi
->viid
, new_mtu
,
1108 -1, -1, -1, -1, true);
1114 static netdev_features_t
cxgb4vf_fix_features(struct net_device
*dev
,
1115 netdev_features_t features
)
1118 * Since there is no support for separate rx/tx vlan accel
1119 * enable/disable make sure tx flag is always in same state as rx.
1121 if (features
& NETIF_F_HW_VLAN_CTAG_RX
)
1122 features
|= NETIF_F_HW_VLAN_CTAG_TX
;
1124 features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
1129 static int cxgb4vf_set_features(struct net_device
*dev
,
1130 netdev_features_t features
)
1132 struct port_info
*pi
= netdev_priv(dev
);
1133 netdev_features_t changed
= dev
->features
^ features
;
1135 if (changed
& NETIF_F_HW_VLAN_CTAG_RX
)
1136 t4vf_set_rxmode(pi
->adapter
, pi
->viid
, -1, -1, -1, -1,
1137 features
& NETIF_F_HW_VLAN_CTAG_TX
, 0);
1143 * Change the devices MAC address.
1145 static int cxgb4vf_set_mac_addr(struct net_device
*dev
, void *_addr
)
1148 struct sockaddr
*addr
= _addr
;
1149 struct port_info
*pi
= netdev_priv(dev
);
1151 if (!is_valid_ether_addr(addr
->sa_data
))
1152 return -EADDRNOTAVAIL
;
1154 ret
= t4vf_change_mac(pi
->adapter
, pi
->viid
, pi
->xact_addr_filt
,
1155 addr
->sa_data
, true);
1159 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
1160 pi
->xact_addr_filt
= ret
;
1164 #ifdef CONFIG_NET_POLL_CONTROLLER
1166 * Poll all of our receive queues. This is called outside of normal interrupt
1169 static void cxgb4vf_poll_controller(struct net_device
*dev
)
1171 struct port_info
*pi
= netdev_priv(dev
);
1172 struct adapter
*adapter
= pi
->adapter
;
1174 if (adapter
->flags
& USING_MSIX
) {
1175 struct sge_eth_rxq
*rxq
;
1178 rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
1179 for (nqsets
= pi
->nqsets
; nqsets
; nqsets
--) {
1180 t4vf_sge_intr_msix(0, &rxq
->rspq
);
1184 t4vf_intr_handler(adapter
)(0, adapter
);
1189 * Ethtool operations.
1190 * ===================
1192 * Note that we don't support any ethtool operations which change the physical
1193 * state of the port to which we're linked.
1197 * Return current port link settings.
1199 static int cxgb4vf_get_settings(struct net_device
*dev
,
1200 struct ethtool_cmd
*cmd
)
1202 const struct port_info
*pi
= netdev_priv(dev
);
1204 cmd
->supported
= pi
->link_cfg
.supported
;
1205 cmd
->advertising
= pi
->link_cfg
.advertising
;
1206 ethtool_cmd_speed_set(cmd
,
1207 netif_carrier_ok(dev
) ? pi
->link_cfg
.speed
: -1);
1208 cmd
->duplex
= DUPLEX_FULL
;
1210 cmd
->port
= (cmd
->supported
& SUPPORTED_TP
) ? PORT_TP
: PORT_FIBRE
;
1211 cmd
->phy_address
= pi
->port_id
;
1212 cmd
->transceiver
= XCVR_EXTERNAL
;
1213 cmd
->autoneg
= pi
->link_cfg
.autoneg
;
1220 * Return our driver information.
1222 static void cxgb4vf_get_drvinfo(struct net_device
*dev
,
1223 struct ethtool_drvinfo
*drvinfo
)
1225 struct adapter
*adapter
= netdev2adap(dev
);
1227 strlcpy(drvinfo
->driver
, KBUILD_MODNAME
, sizeof(drvinfo
->driver
));
1228 strlcpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
1229 strlcpy(drvinfo
->bus_info
, pci_name(to_pci_dev(dev
->dev
.parent
)),
1230 sizeof(drvinfo
->bus_info
));
1231 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
),
1232 "%u.%u.%u.%u, TP %u.%u.%u.%u",
1233 FW_HDR_FW_VER_MAJOR_G(adapter
->params
.dev
.fwrev
),
1234 FW_HDR_FW_VER_MINOR_G(adapter
->params
.dev
.fwrev
),
1235 FW_HDR_FW_VER_MICRO_G(adapter
->params
.dev
.fwrev
),
1236 FW_HDR_FW_VER_BUILD_G(adapter
->params
.dev
.fwrev
),
1237 FW_HDR_FW_VER_MAJOR_G(adapter
->params
.dev
.tprev
),
1238 FW_HDR_FW_VER_MINOR_G(adapter
->params
.dev
.tprev
),
1239 FW_HDR_FW_VER_MICRO_G(adapter
->params
.dev
.tprev
),
1240 FW_HDR_FW_VER_BUILD_G(adapter
->params
.dev
.tprev
));
1244 * Return current adapter message level.
1246 static u32
cxgb4vf_get_msglevel(struct net_device
*dev
)
1248 return netdev2adap(dev
)->msg_enable
;
1252 * Set current adapter message level.
1254 static void cxgb4vf_set_msglevel(struct net_device
*dev
, u32 msglevel
)
1256 netdev2adap(dev
)->msg_enable
= msglevel
;
1260 * Return the device's current Queue Set ring size parameters along with the
1261 * allowed maximum values. Since ethtool doesn't understand the concept of
1262 * multi-queue devices, we just return the current values associated with the
1265 static void cxgb4vf_get_ringparam(struct net_device
*dev
,
1266 struct ethtool_ringparam
*rp
)
1268 const struct port_info
*pi
= netdev_priv(dev
);
1269 const struct sge
*s
= &pi
->adapter
->sge
;
1271 rp
->rx_max_pending
= MAX_RX_BUFFERS
;
1272 rp
->rx_mini_max_pending
= MAX_RSPQ_ENTRIES
;
1273 rp
->rx_jumbo_max_pending
= 0;
1274 rp
->tx_max_pending
= MAX_TXQ_ENTRIES
;
1276 rp
->rx_pending
= s
->ethrxq
[pi
->first_qset
].fl
.size
- MIN_FL_RESID
;
1277 rp
->rx_mini_pending
= s
->ethrxq
[pi
->first_qset
].rspq
.size
;
1278 rp
->rx_jumbo_pending
= 0;
1279 rp
->tx_pending
= s
->ethtxq
[pi
->first_qset
].q
.size
;
1283 * Set the Queue Set ring size parameters for the device. Again, since
1284 * ethtool doesn't allow for the concept of multiple queues per device, we'll
1285 * apply these new values across all of the Queue Sets associated with the
1286 * device -- after vetting them of course!
1288 static int cxgb4vf_set_ringparam(struct net_device
*dev
,
1289 struct ethtool_ringparam
*rp
)
1291 const struct port_info
*pi
= netdev_priv(dev
);
1292 struct adapter
*adapter
= pi
->adapter
;
1293 struct sge
*s
= &adapter
->sge
;
1296 if (rp
->rx_pending
> MAX_RX_BUFFERS
||
1297 rp
->rx_jumbo_pending
||
1298 rp
->tx_pending
> MAX_TXQ_ENTRIES
||
1299 rp
->rx_mini_pending
> MAX_RSPQ_ENTRIES
||
1300 rp
->rx_mini_pending
< MIN_RSPQ_ENTRIES
||
1301 rp
->rx_pending
< MIN_FL_ENTRIES
||
1302 rp
->tx_pending
< MIN_TXQ_ENTRIES
)
1305 if (adapter
->flags
& FULL_INIT_DONE
)
1308 for (qs
= pi
->first_qset
; qs
< pi
->first_qset
+ pi
->nqsets
; qs
++) {
1309 s
->ethrxq
[qs
].fl
.size
= rp
->rx_pending
+ MIN_FL_RESID
;
1310 s
->ethrxq
[qs
].rspq
.size
= rp
->rx_mini_pending
;
1311 s
->ethtxq
[qs
].q
.size
= rp
->tx_pending
;
1317 * Return the interrupt holdoff timer and count for the first Queue Set on the
1318 * device. Our extension ioctl() (the cxgbtool interface) allows the
1319 * interrupt holdoff timer to be read on all of the device's Queue Sets.
1321 static int cxgb4vf_get_coalesce(struct net_device
*dev
,
1322 struct ethtool_coalesce
*coalesce
)
1324 const struct port_info
*pi
= netdev_priv(dev
);
1325 const struct adapter
*adapter
= pi
->adapter
;
1326 const struct sge_rspq
*rspq
= &adapter
->sge
.ethrxq
[pi
->first_qset
].rspq
;
1328 coalesce
->rx_coalesce_usecs
= qtimer_val(adapter
, rspq
);
1329 coalesce
->rx_max_coalesced_frames
=
1330 ((rspq
->intr_params
& QINTR_CNT_EN
)
1331 ? adapter
->sge
.counter_val
[rspq
->pktcnt_idx
]
1337 * Set the RX interrupt holdoff timer and count for the first Queue Set on the
1338 * interface. Our extension ioctl() (the cxgbtool interface) allows us to set
1339 * the interrupt holdoff timer on any of the device's Queue Sets.
1341 static int cxgb4vf_set_coalesce(struct net_device
*dev
,
1342 struct ethtool_coalesce
*coalesce
)
1344 const struct port_info
*pi
= netdev_priv(dev
);
1345 struct adapter
*adapter
= pi
->adapter
;
1347 return set_rxq_intr_params(adapter
,
1348 &adapter
->sge
.ethrxq
[pi
->first_qset
].rspq
,
1349 coalesce
->rx_coalesce_usecs
,
1350 coalesce
->rx_max_coalesced_frames
);
1354 * Report current port link pause parameter settings.
1356 static void cxgb4vf_get_pauseparam(struct net_device
*dev
,
1357 struct ethtool_pauseparam
*pauseparam
)
1359 struct port_info
*pi
= netdev_priv(dev
);
1361 pauseparam
->autoneg
= (pi
->link_cfg
.requested_fc
& PAUSE_AUTONEG
) != 0;
1362 pauseparam
->rx_pause
= (pi
->link_cfg
.fc
& PAUSE_RX
) != 0;
1363 pauseparam
->tx_pause
= (pi
->link_cfg
.fc
& PAUSE_TX
) != 0;
1367 * Identify the port by blinking the port's LED.
1369 static int cxgb4vf_phys_id(struct net_device
*dev
,
1370 enum ethtool_phys_id_state state
)
1373 struct port_info
*pi
= netdev_priv(dev
);
1375 if (state
== ETHTOOL_ID_ACTIVE
)
1377 else if (state
== ETHTOOL_ID_INACTIVE
)
1382 return t4vf_identify_port(pi
->adapter
, pi
->viid
, val
);
1386 * Port stats maintained per queue of the port.
1388 struct queue_port_stats
{
1399 * Strings for the ETH_SS_STATS statistics set ("ethtool -S"). Note that
1400 * these need to match the order of statistics returned by
1401 * t4vf_get_port_stats().
1403 static const char stats_strings
[][ETH_GSTRING_LEN
] = {
1405 * These must match the layout of the t4vf_port_stats structure.
1407 "TxBroadcastBytes ",
1408 "TxBroadcastFrames ",
1409 "TxMulticastBytes ",
1410 "TxMulticastFrames ",
1416 "RxBroadcastBytes ",
1417 "RxBroadcastFrames ",
1418 "RxMulticastBytes ",
1419 "RxMulticastFrames ",
1425 * These are accumulated per-queue statistics and must match the
1426 * order of the fields in the queue_port_stats structure.
1438 * Return the number of statistics in the specified statistics set.
1440 static int cxgb4vf_get_sset_count(struct net_device
*dev
, int sset
)
1444 return ARRAY_SIZE(stats_strings
);
1452 * Return the strings for the specified statistics set.
1454 static void cxgb4vf_get_strings(struct net_device
*dev
,
1460 memcpy(data
, stats_strings
, sizeof(stats_strings
));
1466 * Small utility routine to accumulate queue statistics across the queues of
1469 static void collect_sge_port_stats(const struct adapter
*adapter
,
1470 const struct port_info
*pi
,
1471 struct queue_port_stats
*stats
)
1473 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[pi
->first_qset
];
1474 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
1477 memset(stats
, 0, sizeof(*stats
));
1478 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
1479 stats
->tso
+= txq
->tso
;
1480 stats
->tx_csum
+= txq
->tx_cso
;
1481 stats
->rx_csum
+= rxq
->stats
.rx_cso
;
1482 stats
->vlan_ex
+= rxq
->stats
.vlan_ex
;
1483 stats
->vlan_ins
+= txq
->vlan_ins
;
1484 stats
->lro_pkts
+= rxq
->stats
.lro_pkts
;
1485 stats
->lro_merged
+= rxq
->stats
.lro_merged
;
1490 * Return the ETH_SS_STATS statistics set.
1492 static void cxgb4vf_get_ethtool_stats(struct net_device
*dev
,
1493 struct ethtool_stats
*stats
,
1496 struct port_info
*pi
= netdev2pinfo(dev
);
1497 struct adapter
*adapter
= pi
->adapter
;
1498 int err
= t4vf_get_port_stats(adapter
, pi
->pidx
,
1499 (struct t4vf_port_stats
*)data
);
1501 memset(data
, 0, sizeof(struct t4vf_port_stats
));
1503 data
+= sizeof(struct t4vf_port_stats
) / sizeof(u64
);
1504 collect_sge_port_stats(adapter
, pi
, (struct queue_port_stats
*)data
);
1508 * Return the size of our register map.
1510 static int cxgb4vf_get_regs_len(struct net_device
*dev
)
1512 return T4VF_REGMAP_SIZE
;
1516 * Dump a block of registers, start to end inclusive, into a buffer.
1518 static void reg_block_dump(struct adapter
*adapter
, void *regbuf
,
1519 unsigned int start
, unsigned int end
)
1521 u32
*bp
= regbuf
+ start
- T4VF_REGMAP_START
;
1523 for ( ; start
<= end
; start
+= sizeof(u32
)) {
1525 * Avoid reading the Mailbox Control register since that
1526 * can trigger a Mailbox Ownership Arbitration cycle and
1527 * interfere with communication with the firmware.
1529 if (start
== T4VF_CIM_BASE_ADDR
+ CIM_VF_EXT_MAILBOX_CTRL
)
1532 *bp
++ = t4_read_reg(adapter
, start
);
1537 * Copy our entire register map into the provided buffer.
1539 static void cxgb4vf_get_regs(struct net_device
*dev
,
1540 struct ethtool_regs
*regs
,
1543 struct adapter
*adapter
= netdev2adap(dev
);
1545 regs
->version
= mk_adap_vers(adapter
);
1548 * Fill in register buffer with our register map.
1550 memset(regbuf
, 0, T4VF_REGMAP_SIZE
);
1552 reg_block_dump(adapter
, regbuf
,
1553 T4VF_SGE_BASE_ADDR
+ T4VF_MOD_MAP_SGE_FIRST
,
1554 T4VF_SGE_BASE_ADDR
+ T4VF_MOD_MAP_SGE_LAST
);
1555 reg_block_dump(adapter
, regbuf
,
1556 T4VF_MPS_BASE_ADDR
+ T4VF_MOD_MAP_MPS_FIRST
,
1557 T4VF_MPS_BASE_ADDR
+ T4VF_MOD_MAP_MPS_LAST
);
1559 /* T5 adds new registers in the PL Register map.
1561 reg_block_dump(adapter
, regbuf
,
1562 T4VF_PL_BASE_ADDR
+ T4VF_MOD_MAP_PL_FIRST
,
1563 T4VF_PL_BASE_ADDR
+ (is_t4(adapter
->params
.chip
)
1564 ? A_PL_VF_WHOAMI
: A_PL_VF_REVISION
));
1565 reg_block_dump(adapter
, regbuf
,
1566 T4VF_CIM_BASE_ADDR
+ T4VF_MOD_MAP_CIM_FIRST
,
1567 T4VF_CIM_BASE_ADDR
+ T4VF_MOD_MAP_CIM_LAST
);
1569 reg_block_dump(adapter
, regbuf
,
1570 T4VF_MBDATA_BASE_ADDR
+ T4VF_MBDATA_FIRST
,
1571 T4VF_MBDATA_BASE_ADDR
+ T4VF_MBDATA_LAST
);
1575 * Report current Wake On LAN settings.
1577 static void cxgb4vf_get_wol(struct net_device
*dev
,
1578 struct ethtool_wolinfo
*wol
)
1582 memset(&wol
->sopass
, 0, sizeof(wol
->sopass
));
1586 * TCP Segmentation Offload flags which we support.
1588 #define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
1590 static const struct ethtool_ops cxgb4vf_ethtool_ops
= {
1591 .get_settings
= cxgb4vf_get_settings
,
1592 .get_drvinfo
= cxgb4vf_get_drvinfo
,
1593 .get_msglevel
= cxgb4vf_get_msglevel
,
1594 .set_msglevel
= cxgb4vf_set_msglevel
,
1595 .get_ringparam
= cxgb4vf_get_ringparam
,
1596 .set_ringparam
= cxgb4vf_set_ringparam
,
1597 .get_coalesce
= cxgb4vf_get_coalesce
,
1598 .set_coalesce
= cxgb4vf_set_coalesce
,
1599 .get_pauseparam
= cxgb4vf_get_pauseparam
,
1600 .get_link
= ethtool_op_get_link
,
1601 .get_strings
= cxgb4vf_get_strings
,
1602 .set_phys_id
= cxgb4vf_phys_id
,
1603 .get_sset_count
= cxgb4vf_get_sset_count
,
1604 .get_ethtool_stats
= cxgb4vf_get_ethtool_stats
,
1605 .get_regs_len
= cxgb4vf_get_regs_len
,
1606 .get_regs
= cxgb4vf_get_regs
,
1607 .get_wol
= cxgb4vf_get_wol
,
1611 * /sys/kernel/debug/cxgb4vf support code and data.
1612 * ================================================
1616 * Show SGE Queue Set information. We display QPL Queues Sets per line.
1620 static int sge_qinfo_show(struct seq_file
*seq
, void *v
)
1622 struct adapter
*adapter
= seq
->private;
1623 int eth_entries
= DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
);
1624 int qs
, r
= (uintptr_t)v
- 1;
1627 seq_putc(seq
, '\n');
1629 #define S3(fmt_spec, s, v) \
1631 seq_printf(seq, "%-12s", s); \
1632 for (qs = 0; qs < n; ++qs) \
1633 seq_printf(seq, " %16" fmt_spec, v); \
1634 seq_putc(seq, '\n'); \
1636 #define S(s, v) S3("s", s, v)
1637 #define T(s, v) S3("u", s, txq[qs].v)
1638 #define R(s, v) S3("u", s, rxq[qs].v)
1640 if (r
< eth_entries
) {
1641 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[r
* QPL
];
1642 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[r
* QPL
];
1643 int n
= min(QPL
, adapter
->sge
.ethqsets
- QPL
* r
);
1645 S("QType:", "Ethernet");
1647 (rxq
[qs
].rspq
.netdev
1648 ? rxq
[qs
].rspq
.netdev
->name
1651 (rxq
[qs
].rspq
.netdev
1652 ? ((struct port_info
*)
1653 netdev_priv(rxq
[qs
].rspq
.netdev
))->port_id
1655 T("TxQ ID:", q
.abs_id
);
1656 T("TxQ size:", q
.size
);
1657 T("TxQ inuse:", q
.in_use
);
1658 T("TxQ PIdx:", q
.pidx
);
1659 T("TxQ CIdx:", q
.cidx
);
1660 R("RspQ ID:", rspq
.abs_id
);
1661 R("RspQ size:", rspq
.size
);
1662 R("RspQE size:", rspq
.iqe_len
);
1663 S3("u", "Intr delay:", qtimer_val(adapter
, &rxq
[qs
].rspq
));
1664 S3("u", "Intr pktcnt:",
1665 adapter
->sge
.counter_val
[rxq
[qs
].rspq
.pktcnt_idx
]);
1666 R("RspQ CIdx:", rspq
.cidx
);
1667 R("RspQ Gen:", rspq
.gen
);
1668 R("FL ID:", fl
.abs_id
);
1669 R("FL size:", fl
.size
- MIN_FL_RESID
);
1670 R("FL avail:", fl
.avail
);
1671 R("FL PIdx:", fl
.pidx
);
1672 R("FL CIdx:", fl
.cidx
);
1678 const struct sge_rspq
*evtq
= &adapter
->sge
.fw_evtq
;
1680 seq_printf(seq
, "%-12s %16s\n", "QType:", "FW event queue");
1681 seq_printf(seq
, "%-12s %16u\n", "RspQ ID:", evtq
->abs_id
);
1682 seq_printf(seq
, "%-12s %16u\n", "Intr delay:",
1683 qtimer_val(adapter
, evtq
));
1684 seq_printf(seq
, "%-12s %16u\n", "Intr pktcnt:",
1685 adapter
->sge
.counter_val
[evtq
->pktcnt_idx
]);
1686 seq_printf(seq
, "%-12s %16u\n", "RspQ Cidx:", evtq
->cidx
);
1687 seq_printf(seq
, "%-12s %16u\n", "RspQ Gen:", evtq
->gen
);
1688 } else if (r
== 1) {
1689 const struct sge_rspq
*intrq
= &adapter
->sge
.intrq
;
1691 seq_printf(seq
, "%-12s %16s\n", "QType:", "Interrupt Queue");
1692 seq_printf(seq
, "%-12s %16u\n", "RspQ ID:", intrq
->abs_id
);
1693 seq_printf(seq
, "%-12s %16u\n", "Intr delay:",
1694 qtimer_val(adapter
, intrq
));
1695 seq_printf(seq
, "%-12s %16u\n", "Intr pktcnt:",
1696 adapter
->sge
.counter_val
[intrq
->pktcnt_idx
]);
1697 seq_printf(seq
, "%-12s %16u\n", "RspQ Cidx:", intrq
->cidx
);
1698 seq_printf(seq
, "%-12s %16u\n", "RspQ Gen:", intrq
->gen
);
1710 * Return the number of "entries" in our "file". We group the multi-Queue
1711 * sections with QPL Queue Sets per "entry". The sections of the output are:
1713 * Ethernet RX/TX Queue Sets
1714 * Firmware Event Queue
1715 * Forwarded Interrupt Queue (if in MSI mode)
1717 static int sge_queue_entries(const struct adapter
*adapter
)
1719 return DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
) + 1 +
1720 ((adapter
->flags
& USING_MSI
) != 0);
1723 static void *sge_queue_start(struct seq_file
*seq
, loff_t
*pos
)
1725 int entries
= sge_queue_entries(seq
->private);
1727 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1730 static void sge_queue_stop(struct seq_file
*seq
, void *v
)
1734 static void *sge_queue_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1736 int entries
= sge_queue_entries(seq
->private);
1739 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1742 static const struct seq_operations sge_qinfo_seq_ops
= {
1743 .start
= sge_queue_start
,
1744 .next
= sge_queue_next
,
1745 .stop
= sge_queue_stop
,
1746 .show
= sge_qinfo_show
1749 static int sge_qinfo_open(struct inode
*inode
, struct file
*file
)
1751 int res
= seq_open(file
, &sge_qinfo_seq_ops
);
1754 struct seq_file
*seq
= file
->private_data
;
1755 seq
->private = inode
->i_private
;
1760 static const struct file_operations sge_qinfo_debugfs_fops
= {
1761 .owner
= THIS_MODULE
,
1762 .open
= sge_qinfo_open
,
1764 .llseek
= seq_lseek
,
1765 .release
= seq_release
,
1769 * Show SGE Queue Set statistics. We display QPL Queues Sets per line.
1773 static int sge_qstats_show(struct seq_file
*seq
, void *v
)
1775 struct adapter
*adapter
= seq
->private;
1776 int eth_entries
= DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
);
1777 int qs
, r
= (uintptr_t)v
- 1;
1780 seq_putc(seq
, '\n');
1782 #define S3(fmt, s, v) \
1784 seq_printf(seq, "%-16s", s); \
1785 for (qs = 0; qs < n; ++qs) \
1786 seq_printf(seq, " %8" fmt, v); \
1787 seq_putc(seq, '\n'); \
1789 #define S(s, v) S3("s", s, v)
1791 #define T3(fmt, s, v) S3(fmt, s, txq[qs].v)
1792 #define T(s, v) T3("lu", s, v)
1794 #define R3(fmt, s, v) S3(fmt, s, rxq[qs].v)
1795 #define R(s, v) R3("lu", s, v)
1797 if (r
< eth_entries
) {
1798 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[r
* QPL
];
1799 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[r
* QPL
];
1800 int n
= min(QPL
, adapter
->sge
.ethqsets
- QPL
* r
);
1802 S("QType:", "Ethernet");
1804 (rxq
[qs
].rspq
.netdev
1805 ? rxq
[qs
].rspq
.netdev
->name
1807 R3("u", "RspQNullInts:", rspq
.unhandled_irqs
);
1808 R("RxPackets:", stats
.pkts
);
1809 R("RxCSO:", stats
.rx_cso
);
1810 R("VLANxtract:", stats
.vlan_ex
);
1811 R("LROmerged:", stats
.lro_merged
);
1812 R("LROpackets:", stats
.lro_pkts
);
1813 R("RxDrops:", stats
.rx_drops
);
1815 T("TxCSO:", tx_cso
);
1816 T("VLANins:", vlan_ins
);
1817 T("TxQFull:", q
.stops
);
1818 T("TxQRestarts:", q
.restarts
);
1819 T("TxMapErr:", mapping_err
);
1820 R("FLAllocErr:", fl
.alloc_failed
);
1821 R("FLLrgAlcErr:", fl
.large_alloc_failed
);
1822 R("FLStarving:", fl
.starving
);
1828 const struct sge_rspq
*evtq
= &adapter
->sge
.fw_evtq
;
1830 seq_printf(seq
, "%-8s %16s\n", "QType:", "FW event queue");
1831 seq_printf(seq
, "%-16s %8u\n", "RspQNullInts:",
1832 evtq
->unhandled_irqs
);
1833 seq_printf(seq
, "%-16s %8u\n", "RspQ CIdx:", evtq
->cidx
);
1834 seq_printf(seq
, "%-16s %8u\n", "RspQ Gen:", evtq
->gen
);
1835 } else if (r
== 1) {
1836 const struct sge_rspq
*intrq
= &adapter
->sge
.intrq
;
1838 seq_printf(seq
, "%-8s %16s\n", "QType:", "Interrupt Queue");
1839 seq_printf(seq
, "%-16s %8u\n", "RspQNullInts:",
1840 intrq
->unhandled_irqs
);
1841 seq_printf(seq
, "%-16s %8u\n", "RspQ CIdx:", intrq
->cidx
);
1842 seq_printf(seq
, "%-16s %8u\n", "RspQ Gen:", intrq
->gen
);
1856 * Return the number of "entries" in our "file". We group the multi-Queue
1857 * sections with QPL Queue Sets per "entry". The sections of the output are:
1859 * Ethernet RX/TX Queue Sets
1860 * Firmware Event Queue
1861 * Forwarded Interrupt Queue (if in MSI mode)
1863 static int sge_qstats_entries(const struct adapter
*adapter
)
1865 return DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
) + 1 +
1866 ((adapter
->flags
& USING_MSI
) != 0);
1869 static void *sge_qstats_start(struct seq_file
*seq
, loff_t
*pos
)
1871 int entries
= sge_qstats_entries(seq
->private);
1873 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1876 static void sge_qstats_stop(struct seq_file
*seq
, void *v
)
1880 static void *sge_qstats_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1882 int entries
= sge_qstats_entries(seq
->private);
1885 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1888 static const struct seq_operations sge_qstats_seq_ops
= {
1889 .start
= sge_qstats_start
,
1890 .next
= sge_qstats_next
,
1891 .stop
= sge_qstats_stop
,
1892 .show
= sge_qstats_show
1895 static int sge_qstats_open(struct inode
*inode
, struct file
*file
)
1897 int res
= seq_open(file
, &sge_qstats_seq_ops
);
1900 struct seq_file
*seq
= file
->private_data
;
1901 seq
->private = inode
->i_private
;
1906 static const struct file_operations sge_qstats_proc_fops
= {
1907 .owner
= THIS_MODULE
,
1908 .open
= sge_qstats_open
,
1910 .llseek
= seq_lseek
,
1911 .release
= seq_release
,
1915 * Show PCI-E SR-IOV Virtual Function Resource Limits.
1917 static int resources_show(struct seq_file
*seq
, void *v
)
1919 struct adapter
*adapter
= seq
->private;
1920 struct vf_resources
*vfres
= &adapter
->params
.vfres
;
1922 #define S(desc, fmt, var) \
1923 seq_printf(seq, "%-60s " fmt "\n", \
1924 desc " (" #var "):", vfres->var)
1926 S("Virtual Interfaces", "%d", nvi
);
1927 S("Egress Queues", "%d", neq
);
1928 S("Ethernet Control", "%d", nethctrl
);
1929 S("Ingress Queues/w Free Lists/Interrupts", "%d", niqflint
);
1930 S("Ingress Queues", "%d", niq
);
1931 S("Traffic Class", "%d", tc
);
1932 S("Port Access Rights Mask", "%#x", pmask
);
1933 S("MAC Address Filters", "%d", nexactf
);
1934 S("Firmware Command Read Capabilities", "%#x", r_caps
);
1935 S("Firmware Command Write/Execute Capabilities", "%#x", wx_caps
);
1942 static int resources_open(struct inode
*inode
, struct file
*file
)
1944 return single_open(file
, resources_show
, inode
->i_private
);
1947 static const struct file_operations resources_proc_fops
= {
1948 .owner
= THIS_MODULE
,
1949 .open
= resources_open
,
1951 .llseek
= seq_lseek
,
1952 .release
= single_release
,
1956 * Show Virtual Interfaces.
1958 static int interfaces_show(struct seq_file
*seq
, void *v
)
1960 if (v
== SEQ_START_TOKEN
) {
1961 seq_puts(seq
, "Interface Port VIID\n");
1963 struct adapter
*adapter
= seq
->private;
1964 int pidx
= (uintptr_t)v
- 2;
1965 struct net_device
*dev
= adapter
->port
[pidx
];
1966 struct port_info
*pi
= netdev_priv(dev
);
1968 seq_printf(seq
, "%9s %4d %#5x\n",
1969 dev
->name
, pi
->port_id
, pi
->viid
);
1974 static inline void *interfaces_get_idx(struct adapter
*adapter
, loff_t pos
)
1976 return pos
<= adapter
->params
.nports
1977 ? (void *)(uintptr_t)(pos
+ 1)
1981 static void *interfaces_start(struct seq_file
*seq
, loff_t
*pos
)
1984 ? interfaces_get_idx(seq
->private, *pos
)
1988 static void *interfaces_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1991 return interfaces_get_idx(seq
->private, *pos
);
1994 static void interfaces_stop(struct seq_file
*seq
, void *v
)
1998 static const struct seq_operations interfaces_seq_ops
= {
1999 .start
= interfaces_start
,
2000 .next
= interfaces_next
,
2001 .stop
= interfaces_stop
,
2002 .show
= interfaces_show
2005 static int interfaces_open(struct inode
*inode
, struct file
*file
)
2007 int res
= seq_open(file
, &interfaces_seq_ops
);
2010 struct seq_file
*seq
= file
->private_data
;
2011 seq
->private = inode
->i_private
;
2016 static const struct file_operations interfaces_proc_fops
= {
2017 .owner
= THIS_MODULE
,
2018 .open
= interfaces_open
,
2020 .llseek
= seq_lseek
,
2021 .release
= seq_release
,
2025 * /sys/kernel/debugfs/cxgb4vf/ files list.
2027 struct cxgb4vf_debugfs_entry
{
2028 const char *name
; /* name of debugfs node */
2029 umode_t mode
; /* file system mode */
2030 const struct file_operations
*fops
;
2033 static struct cxgb4vf_debugfs_entry debugfs_files
[] = {
2034 { "sge_qinfo", S_IRUGO
, &sge_qinfo_debugfs_fops
},
2035 { "sge_qstats", S_IRUGO
, &sge_qstats_proc_fops
},
2036 { "resources", S_IRUGO
, &resources_proc_fops
},
2037 { "interfaces", S_IRUGO
, &interfaces_proc_fops
},
2041 * Module and device initialization and cleanup code.
2042 * ==================================================
2046 * Set up out /sys/kernel/debug/cxgb4vf sub-nodes. We assume that the
2047 * directory (debugfs_root) has already been set up.
2049 static int setup_debugfs(struct adapter
*adapter
)
2053 BUG_ON(IS_ERR_OR_NULL(adapter
->debugfs_root
));
2056 * Debugfs support is best effort.
2058 for (i
= 0; i
< ARRAY_SIZE(debugfs_files
); i
++)
2059 (void)debugfs_create_file(debugfs_files
[i
].name
,
2060 debugfs_files
[i
].mode
,
2061 adapter
->debugfs_root
,
2063 debugfs_files
[i
].fops
);
2069 * Tear down the /sys/kernel/debug/cxgb4vf sub-nodes created above. We leave
2070 * it to our caller to tear down the directory (debugfs_root).
2072 static void cleanup_debugfs(struct adapter
*adapter
)
2074 BUG_ON(IS_ERR_OR_NULL(adapter
->debugfs_root
));
2077 * Unlike our sister routine cleanup_proc(), we don't need to remove
2078 * individual entries because a call will be made to
2079 * debugfs_remove_recursive(). We just need to clean up any ancillary
2086 * Perform early "adapter" initialization. This is where we discover what
2087 * adapter parameters we're going to be using and initialize basic adapter
2090 static int adap_init0(struct adapter
*adapter
)
2092 struct vf_resources
*vfres
= &adapter
->params
.vfres
;
2093 struct sge_params
*sge_params
= &adapter
->params
.sge
;
2094 struct sge
*s
= &adapter
->sge
;
2095 unsigned int ethqsets
;
2098 unsigned int chipid
;
2101 * Wait for the device to become ready before proceeding ...
2103 err
= t4vf_wait_dev_ready(adapter
);
2105 dev_err(adapter
->pdev_dev
, "device didn't become ready:"
2111 * Some environments do not properly handle PCIE FLRs -- e.g. in Linux
2112 * 2.6.31 and later we can't call pci_reset_function() in order to
2113 * issue an FLR because of a self- deadlock on the device semaphore.
2114 * Meanwhile, the OS infrastructure doesn't issue FLRs in all the
2115 * cases where they're needed -- for instance, some versions of KVM
2116 * fail to reset "Assigned Devices" when the VM reboots. Therefore we
2117 * use the firmware based reset in order to reset any per function
2120 err
= t4vf_fw_reset(adapter
);
2122 dev_err(adapter
->pdev_dev
, "FW reset failed: err=%d\n", err
);
2126 adapter
->params
.chip
= 0;
2127 switch (adapter
->pdev
->device
>> 12) {
2129 adapter
->params
.chip
= CHELSIO_CHIP_CODE(CHELSIO_T4
, 0);
2132 chipid
= G_REV(t4_read_reg(adapter
, A_PL_VF_REV
));
2133 adapter
->params
.chip
|= CHELSIO_CHIP_CODE(CHELSIO_T5
, chipid
);
2138 * Grab basic operational parameters. These will predominantly have
2139 * been set up by the Physical Function Driver or will be hard coded
2140 * into the adapter. We just have to live with them ... Note that
2141 * we _must_ get our VPD parameters before our SGE parameters because
2142 * we need to know the adapter's core clock from the VPD in order to
2143 * properly decode the SGE Timer Values.
2145 err
= t4vf_get_dev_params(adapter
);
2147 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2148 " device parameters: err=%d\n", err
);
2151 err
= t4vf_get_vpd_params(adapter
);
2153 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2154 " VPD parameters: err=%d\n", err
);
2157 err
= t4vf_get_sge_params(adapter
);
2159 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2160 " SGE parameters: err=%d\n", err
);
2163 err
= t4vf_get_rss_glb_config(adapter
);
2165 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2166 " RSS parameters: err=%d\n", err
);
2169 if (adapter
->params
.rss
.mode
!=
2170 FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL
) {
2171 dev_err(adapter
->pdev_dev
, "unable to operate with global RSS"
2172 " mode %d\n", adapter
->params
.rss
.mode
);
2175 err
= t4vf_sge_init(adapter
);
2177 dev_err(adapter
->pdev_dev
, "unable to use adapter parameters:"
2182 /* If we're running on newer firmware, let it know that we're
2183 * prepared to deal with encapsulated CPL messages. Older
2184 * firmware won't understand this and we'll just get
2185 * unencapsulated messages ...
2187 param
= FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_PFVF
) |
2188 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_PFVF_CPLFW4MSG_ENCAP
);
2190 (void) t4vf_set_params(adapter
, 1, ¶m
, &val
);
2193 * Retrieve our RX interrupt holdoff timer values and counter
2194 * threshold values from the SGE parameters.
2196 s
->timer_val
[0] = core_ticks_to_us(adapter
,
2197 TIMERVALUE0_GET(sge_params
->sge_timer_value_0_and_1
));
2198 s
->timer_val
[1] = core_ticks_to_us(adapter
,
2199 TIMERVALUE1_GET(sge_params
->sge_timer_value_0_and_1
));
2200 s
->timer_val
[2] = core_ticks_to_us(adapter
,
2201 TIMERVALUE0_GET(sge_params
->sge_timer_value_2_and_3
));
2202 s
->timer_val
[3] = core_ticks_to_us(adapter
,
2203 TIMERVALUE1_GET(sge_params
->sge_timer_value_2_and_3
));
2204 s
->timer_val
[4] = core_ticks_to_us(adapter
,
2205 TIMERVALUE0_GET(sge_params
->sge_timer_value_4_and_5
));
2206 s
->timer_val
[5] = core_ticks_to_us(adapter
,
2207 TIMERVALUE1_GET(sge_params
->sge_timer_value_4_and_5
));
2210 THRESHOLD_0_GET(sge_params
->sge_ingress_rx_threshold
);
2212 THRESHOLD_1_GET(sge_params
->sge_ingress_rx_threshold
);
2214 THRESHOLD_2_GET(sge_params
->sge_ingress_rx_threshold
);
2216 THRESHOLD_3_GET(sge_params
->sge_ingress_rx_threshold
);
2219 * Grab our Virtual Interface resource allocation, extract the
2220 * features that we're interested in and do a bit of sanity testing on
2223 err
= t4vf_get_vfres(adapter
);
2225 dev_err(adapter
->pdev_dev
, "unable to get virtual interface"
2226 " resources: err=%d\n", err
);
2231 * The number of "ports" which we support is equal to the number of
2232 * Virtual Interfaces with which we've been provisioned.
2234 adapter
->params
.nports
= vfres
->nvi
;
2235 if (adapter
->params
.nports
> MAX_NPORTS
) {
2236 dev_warn(adapter
->pdev_dev
, "only using %d of %d allowed"
2237 " virtual interfaces\n", MAX_NPORTS
,
2238 adapter
->params
.nports
);
2239 adapter
->params
.nports
= MAX_NPORTS
;
2243 * We need to reserve a number of the ingress queues with Free List
2244 * and Interrupt capabilities for special interrupt purposes (like
2245 * asynchronous firmware messages, or forwarded interrupts if we're
2246 * using MSI). The rest of the FL/Intr-capable ingress queues will be
2247 * matched up one-for-one with Ethernet/Control egress queues in order
2248 * to form "Queue Sets" which will be aportioned between the "ports".
2249 * For each Queue Set, we'll need the ability to allocate two Egress
2250 * Contexts -- one for the Ingress Queue Free List and one for the TX
2253 ethqsets
= vfres
->niqflint
- INGQ_EXTRAS
;
2254 if (vfres
->nethctrl
!= ethqsets
) {
2255 dev_warn(adapter
->pdev_dev
, "unequal number of [available]"
2256 " ingress/egress queues (%d/%d); using minimum for"
2257 " number of Queue Sets\n", ethqsets
, vfres
->nethctrl
);
2258 ethqsets
= min(vfres
->nethctrl
, ethqsets
);
2260 if (vfres
->neq
< ethqsets
*2) {
2261 dev_warn(adapter
->pdev_dev
, "Not enough Egress Contexts (%d)"
2262 " to support Queue Sets (%d); reducing allowed Queue"
2263 " Sets\n", vfres
->neq
, ethqsets
);
2264 ethqsets
= vfres
->neq
/2;
2266 if (ethqsets
> MAX_ETH_QSETS
) {
2267 dev_warn(adapter
->pdev_dev
, "only using %d of %d allowed Queue"
2268 " Sets\n", MAX_ETH_QSETS
, adapter
->sge
.max_ethqsets
);
2269 ethqsets
= MAX_ETH_QSETS
;
2271 if (vfres
->niq
!= 0 || vfres
->neq
> ethqsets
*2) {
2272 dev_warn(adapter
->pdev_dev
, "unused resources niq/neq (%d/%d)"
2273 " ignored\n", vfres
->niq
, vfres
->neq
- ethqsets
*2);
2275 adapter
->sge
.max_ethqsets
= ethqsets
;
2278 * Check for various parameter sanity issues. Most checks simply
2279 * result in us using fewer resources than our provissioning but we
2280 * do need at least one "port" with which to work ...
2282 if (adapter
->sge
.max_ethqsets
< adapter
->params
.nports
) {
2283 dev_warn(adapter
->pdev_dev
, "only using %d of %d available"
2284 " virtual interfaces (too few Queue Sets)\n",
2285 adapter
->sge
.max_ethqsets
, adapter
->params
.nports
);
2286 adapter
->params
.nports
= adapter
->sge
.max_ethqsets
;
2288 if (adapter
->params
.nports
== 0) {
2289 dev_err(adapter
->pdev_dev
, "no virtual interfaces configured/"
2296 static inline void init_rspq(struct sge_rspq
*rspq
, u8 timer_idx
,
2297 u8 pkt_cnt_idx
, unsigned int size
,
2298 unsigned int iqe_size
)
2300 rspq
->intr_params
= (QINTR_TIMER_IDX(timer_idx
) |
2301 (pkt_cnt_idx
< SGE_NCOUNTERS
? QINTR_CNT_EN
: 0));
2302 rspq
->pktcnt_idx
= (pkt_cnt_idx
< SGE_NCOUNTERS
2305 rspq
->iqe_len
= iqe_size
;
2310 * Perform default configuration of DMA queues depending on the number and
2311 * type of ports we found and the number of available CPUs. Most settings can
2312 * be modified by the admin via ethtool and cxgbtool prior to the adapter
2313 * being brought up for the first time.
2315 static void cfg_queues(struct adapter
*adapter
)
2317 struct sge
*s
= &adapter
->sge
;
2318 int q10g
, n10g
, qidx
, pidx
, qs
;
2322 * We should not be called till we know how many Queue Sets we can
2323 * support. In particular, this means that we need to know what kind
2324 * of interrupts we'll be using ...
2326 BUG_ON((adapter
->flags
& (USING_MSIX
|USING_MSI
)) == 0);
2329 * Count the number of 10GbE Virtual Interfaces that we have.
2332 for_each_port(adapter
, pidx
)
2333 n10g
+= is_10g_port(&adap2pinfo(adapter
, pidx
)->link_cfg
);
2336 * We default to 1 queue per non-10G port and up to # of cores queues
2342 int n1g
= (adapter
->params
.nports
- n10g
);
2343 q10g
= (adapter
->sge
.max_ethqsets
- n1g
) / n10g
;
2344 if (q10g
> num_online_cpus())
2345 q10g
= num_online_cpus();
2349 * Allocate the "Queue Sets" to the various Virtual Interfaces.
2350 * The layout will be established in setup_sge_queues() when the
2351 * adapter is brough up for the first time.
2354 for_each_port(adapter
, pidx
) {
2355 struct port_info
*pi
= adap2pinfo(adapter
, pidx
);
2357 pi
->first_qset
= qidx
;
2358 pi
->nqsets
= is_x_10g_port(&pi
->link_cfg
) ? q10g
: 1;
2364 * The Ingress Queue Entry Size for our various Response Queues needs
2365 * to be big enough to accommodate the largest message we can receive
2366 * from the chip/firmware; which is 64 bytes ...
2371 * Set up default Queue Set parameters ... Start off with the
2372 * shortest interrupt holdoff timer.
2374 for (qs
= 0; qs
< s
->max_ethqsets
; qs
++) {
2375 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[qs
];
2376 struct sge_eth_txq
*txq
= &s
->ethtxq
[qs
];
2378 init_rspq(&rxq
->rspq
, 0, 0, 1024, iqe_size
);
2384 * The firmware event queue is used for link state changes and
2385 * notifications of TX DMA completions.
2387 init_rspq(&s
->fw_evtq
, SGE_TIMER_RSTRT_CNTR
, 0, 512, iqe_size
);
2390 * The forwarded interrupt queue is used when we're in MSI interrupt
2391 * mode. In this mode all interrupts associated with RX queues will
2392 * be forwarded to a single queue which we'll associate with our MSI
2393 * interrupt vector. The messages dropped in the forwarded interrupt
2394 * queue will indicate which ingress queue needs servicing ... This
2395 * queue needs to be large enough to accommodate all of the ingress
2396 * queues which are forwarding their interrupt (+1 to prevent the PIDX
2397 * from equalling the CIDX if every ingress queue has an outstanding
2398 * interrupt). The queue doesn't need to be any larger because no
2399 * ingress queue will ever have more than one outstanding interrupt at
2402 init_rspq(&s
->intrq
, SGE_TIMER_RSTRT_CNTR
, 0, MSIX_ENTRIES
+ 1,
2407 * Reduce the number of Ethernet queues across all ports to at most n.
2408 * n provides at least one queue per port.
2410 static void reduce_ethqs(struct adapter
*adapter
, int n
)
2413 struct port_info
*pi
;
2416 * While we have too many active Ether Queue Sets, interate across the
2417 * "ports" and reduce their individual Queue Set allocations.
2419 BUG_ON(n
< adapter
->params
.nports
);
2420 while (n
< adapter
->sge
.ethqsets
)
2421 for_each_port(adapter
, i
) {
2422 pi
= adap2pinfo(adapter
, i
);
2423 if (pi
->nqsets
> 1) {
2425 adapter
->sge
.ethqsets
--;
2426 if (adapter
->sge
.ethqsets
<= n
)
2432 * Reassign the starting Queue Sets for each of the "ports" ...
2435 for_each_port(adapter
, i
) {
2436 pi
= adap2pinfo(adapter
, i
);
2443 * We need to grab enough MSI-X vectors to cover our interrupt needs. Ideally
2444 * we get a separate MSI-X vector for every "Queue Set" plus any extras we
2445 * need. Minimally we need one for every Virtual Interface plus those needed
2446 * for our "extras". Note that this process may lower the maximum number of
2447 * allowed Queue Sets ...
2449 static int enable_msix(struct adapter
*adapter
)
2451 int i
, want
, need
, nqsets
;
2452 struct msix_entry entries
[MSIX_ENTRIES
];
2453 struct sge
*s
= &adapter
->sge
;
2455 for (i
= 0; i
< MSIX_ENTRIES
; ++i
)
2456 entries
[i
].entry
= i
;
2459 * We _want_ enough MSI-X interrupts to cover all of our "Queue Sets"
2460 * plus those needed for our "extras" (for example, the firmware
2461 * message queue). We _need_ at least one "Queue Set" per Virtual
2462 * Interface plus those needed for our "extras". So now we get to see
2463 * if the song is right ...
2465 want
= s
->max_ethqsets
+ MSIX_EXTRAS
;
2466 need
= adapter
->params
.nports
+ MSIX_EXTRAS
;
2468 want
= pci_enable_msix_range(adapter
->pdev
, entries
, need
, want
);
2472 nqsets
= want
- MSIX_EXTRAS
;
2473 if (nqsets
< s
->max_ethqsets
) {
2474 dev_warn(adapter
->pdev_dev
, "only enough MSI-X vectors"
2475 " for %d Queue Sets\n", nqsets
);
2476 s
->max_ethqsets
= nqsets
;
2477 if (nqsets
< s
->ethqsets
)
2478 reduce_ethqs(adapter
, nqsets
);
2480 for (i
= 0; i
< want
; ++i
)
2481 adapter
->msix_info
[i
].vec
= entries
[i
].vector
;
2486 static const struct net_device_ops cxgb4vf_netdev_ops
= {
2487 .ndo_open
= cxgb4vf_open
,
2488 .ndo_stop
= cxgb4vf_stop
,
2489 .ndo_start_xmit
= t4vf_eth_xmit
,
2490 .ndo_get_stats
= cxgb4vf_get_stats
,
2491 .ndo_set_rx_mode
= cxgb4vf_set_rxmode
,
2492 .ndo_set_mac_address
= cxgb4vf_set_mac_addr
,
2493 .ndo_validate_addr
= eth_validate_addr
,
2494 .ndo_do_ioctl
= cxgb4vf_do_ioctl
,
2495 .ndo_change_mtu
= cxgb4vf_change_mtu
,
2496 .ndo_fix_features
= cxgb4vf_fix_features
,
2497 .ndo_set_features
= cxgb4vf_set_features
,
2498 #ifdef CONFIG_NET_POLL_CONTROLLER
2499 .ndo_poll_controller
= cxgb4vf_poll_controller
,
2504 * "Probe" a device: initialize a device and construct all kernel and driver
2505 * state needed to manage the device. This routine is called "init_one" in
2508 static int cxgb4vf_pci_probe(struct pci_dev
*pdev
,
2509 const struct pci_device_id
*ent
)
2514 struct adapter
*adapter
;
2515 struct port_info
*pi
;
2516 struct net_device
*netdev
;
2519 * Print our driver banner the first time we're called to initialize a
2522 pr_info_once("%s - version %s\n", DRV_DESC
, DRV_VERSION
);
2525 * Initialize generic PCI device state.
2527 err
= pci_enable_device(pdev
);
2529 dev_err(&pdev
->dev
, "cannot enable PCI device\n");
2534 * Reserve PCI resources for the device. If we can't get them some
2535 * other driver may have already claimed the device ...
2537 err
= pci_request_regions(pdev
, KBUILD_MODNAME
);
2539 dev_err(&pdev
->dev
, "cannot obtain PCI resources\n");
2540 goto err_disable_device
;
2544 * Set up our DMA mask: try for 64-bit address masking first and
2545 * fall back to 32-bit if we can't get 64 bits ...
2547 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
2549 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
2551 dev_err(&pdev
->dev
, "unable to obtain 64-bit DMA for"
2552 " coherent allocations\n");
2553 goto err_release_regions
;
2557 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
2559 dev_err(&pdev
->dev
, "no usable DMA configuration\n");
2560 goto err_release_regions
;
2566 * Enable bus mastering for the device ...
2568 pci_set_master(pdev
);
2571 * Allocate our adapter data structure and attach it to the device.
2573 adapter
= kzalloc(sizeof(*adapter
), GFP_KERNEL
);
2576 goto err_release_regions
;
2578 pci_set_drvdata(pdev
, adapter
);
2579 adapter
->pdev
= pdev
;
2580 adapter
->pdev_dev
= &pdev
->dev
;
2583 * Initialize SMP data synchronization resources.
2585 spin_lock_init(&adapter
->stats_lock
);
2588 * Map our I/O registers in BAR0.
2590 adapter
->regs
= pci_ioremap_bar(pdev
, 0);
2591 if (!adapter
->regs
) {
2592 dev_err(&pdev
->dev
, "cannot map device registers\n");
2594 goto err_free_adapter
;
2597 /* Wait for the device to become ready before proceeding ...
2599 err
= t4vf_prep_adapter(adapter
);
2601 dev_err(adapter
->pdev_dev
, "device didn't become ready:"
2603 goto err_unmap_bar0
;
2606 /* For T5 and later we want to use the new BAR-based User Doorbells,
2607 * so we need to map BAR2 here ...
2609 if (!is_t4(adapter
->params
.chip
)) {
2610 adapter
->bar2
= ioremap_wc(pci_resource_start(pdev
, 2),
2611 pci_resource_len(pdev
, 2));
2612 if (!adapter
->bar2
) {
2613 dev_err(adapter
->pdev_dev
, "cannot map BAR2 doorbells\n");
2615 goto err_unmap_bar0
;
2619 * Initialize adapter level features.
2621 adapter
->name
= pci_name(pdev
);
2622 adapter
->msg_enable
= dflt_msg_enable
;
2623 err
= adap_init0(adapter
);
2628 * Allocate our "adapter ports" and stitch everything together.
2630 pmask
= adapter
->params
.vfres
.pmask
;
2631 for_each_port(adapter
, pidx
) {
2635 * We simplistically allocate our virtual interfaces
2636 * sequentially across the port numbers to which we have
2637 * access rights. This should be configurable in some manner
2642 port_id
= ffs(pmask
) - 1;
2643 pmask
&= ~(1 << port_id
);
2644 viid
= t4vf_alloc_vi(adapter
, port_id
);
2646 dev_err(&pdev
->dev
, "cannot allocate VI for port %d:"
2647 " err=%d\n", port_id
, viid
);
2653 * Allocate our network device and stitch things together.
2655 netdev
= alloc_etherdev_mq(sizeof(struct port_info
),
2657 if (netdev
== NULL
) {
2658 t4vf_free_vi(adapter
, viid
);
2662 adapter
->port
[pidx
] = netdev
;
2663 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2664 pi
= netdev_priv(netdev
);
2665 pi
->adapter
= adapter
;
2667 pi
->port_id
= port_id
;
2671 * Initialize the starting state of our "port" and register
2674 pi
->xact_addr_filt
= -1;
2675 netif_carrier_off(netdev
);
2676 netdev
->irq
= pdev
->irq
;
2678 netdev
->hw_features
= NETIF_F_SG
| TSO_FLAGS
|
2679 NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
2680 NETIF_F_HW_VLAN_CTAG_RX
| NETIF_F_RXCSUM
;
2681 netdev
->vlan_features
= NETIF_F_SG
| TSO_FLAGS
|
2682 NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
2684 netdev
->features
= netdev
->hw_features
|
2685 NETIF_F_HW_VLAN_CTAG_TX
;
2687 netdev
->features
|= NETIF_F_HIGHDMA
;
2689 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
2691 netdev
->netdev_ops
= &cxgb4vf_netdev_ops
;
2692 netdev
->ethtool_ops
= &cxgb4vf_ethtool_ops
;
2695 * Initialize the hardware/software state for the port.
2697 err
= t4vf_port_init(adapter
, pidx
);
2699 dev_err(&pdev
->dev
, "cannot initialize port %d\n",
2706 * The "card" is now ready to go. If any errors occur during device
2707 * registration we do not fail the whole "card" but rather proceed
2708 * only with the ports we manage to register successfully. However we
2709 * must register at least one net device.
2711 for_each_port(adapter
, pidx
) {
2712 netdev
= adapter
->port
[pidx
];
2716 err
= register_netdev(netdev
);
2718 dev_warn(&pdev
->dev
, "cannot register net device %s,"
2719 " skipping\n", netdev
->name
);
2723 set_bit(pidx
, &adapter
->registered_device_map
);
2725 if (adapter
->registered_device_map
== 0) {
2726 dev_err(&pdev
->dev
, "could not register any net devices\n");
2731 * Set up our debugfs entries.
2733 if (!IS_ERR_OR_NULL(cxgb4vf_debugfs_root
)) {
2734 adapter
->debugfs_root
=
2735 debugfs_create_dir(pci_name(pdev
),
2736 cxgb4vf_debugfs_root
);
2737 if (IS_ERR_OR_NULL(adapter
->debugfs_root
))
2738 dev_warn(&pdev
->dev
, "could not create debugfs"
2741 setup_debugfs(adapter
);
2745 * See what interrupts we'll be using. If we've been configured to
2746 * use MSI-X interrupts, try to enable them but fall back to using
2747 * MSI interrupts if we can't enable MSI-X interrupts. If we can't
2748 * get MSI interrupts we bail with the error.
2750 if (msi
== MSI_MSIX
&& enable_msix(adapter
) == 0)
2751 adapter
->flags
|= USING_MSIX
;
2753 err
= pci_enable_msi(pdev
);
2755 dev_err(&pdev
->dev
, "Unable to allocate %s interrupts;"
2757 msi
== MSI_MSIX
? "MSI-X or MSI" : "MSI", err
);
2758 goto err_free_debugfs
;
2760 adapter
->flags
|= USING_MSI
;
2764 * Now that we know how many "ports" we have and what their types are,
2765 * and how many Queue Sets we can support, we can configure our queue
2768 cfg_queues(adapter
);
2771 * Print a short notice on the existence and configuration of the new
2772 * VF network device ...
2774 for_each_port(adapter
, pidx
) {
2775 dev_info(adapter
->pdev_dev
, "%s: Chelsio VF NIC PCIe %s\n",
2776 adapter
->port
[pidx
]->name
,
2777 (adapter
->flags
& USING_MSIX
) ? "MSI-X" :
2778 (adapter
->flags
& USING_MSI
) ? "MSI" : "");
2787 * Error recovery and exit code. Unwind state that's been created
2788 * so far and return the error.
2792 if (!IS_ERR_OR_NULL(adapter
->debugfs_root
)) {
2793 cleanup_debugfs(adapter
);
2794 debugfs_remove_recursive(adapter
->debugfs_root
);
2798 for_each_port(adapter
, pidx
) {
2799 netdev
= adapter
->port
[pidx
];
2802 pi
= netdev_priv(netdev
);
2803 t4vf_free_vi(adapter
, pi
->viid
);
2804 if (test_bit(pidx
, &adapter
->registered_device_map
))
2805 unregister_netdev(netdev
);
2806 free_netdev(netdev
);
2810 if (!is_t4(adapter
->params
.chip
))
2811 iounmap(adapter
->bar2
);
2814 iounmap(adapter
->regs
);
2819 err_release_regions
:
2820 pci_release_regions(pdev
);
2821 pci_clear_master(pdev
);
2824 pci_disable_device(pdev
);
2830 * "Remove" a device: tear down all kernel and driver state created in the
2831 * "probe" routine and quiesce the device (disable interrupts, etc.). (Note
2832 * that this is called "remove_one" in the PF Driver.)
2834 static void cxgb4vf_pci_remove(struct pci_dev
*pdev
)
2836 struct adapter
*adapter
= pci_get_drvdata(pdev
);
2839 * Tear down driver state associated with device.
2845 * Stop all of our activity. Unregister network port,
2846 * disable interrupts, etc.
2848 for_each_port(adapter
, pidx
)
2849 if (test_bit(pidx
, &adapter
->registered_device_map
))
2850 unregister_netdev(adapter
->port
[pidx
]);
2851 t4vf_sge_stop(adapter
);
2852 if (adapter
->flags
& USING_MSIX
) {
2853 pci_disable_msix(adapter
->pdev
);
2854 adapter
->flags
&= ~USING_MSIX
;
2855 } else if (adapter
->flags
& USING_MSI
) {
2856 pci_disable_msi(adapter
->pdev
);
2857 adapter
->flags
&= ~USING_MSI
;
2861 * Tear down our debugfs entries.
2863 if (!IS_ERR_OR_NULL(adapter
->debugfs_root
)) {
2864 cleanup_debugfs(adapter
);
2865 debugfs_remove_recursive(adapter
->debugfs_root
);
2869 * Free all of the various resources which we've acquired ...
2871 t4vf_free_sge_resources(adapter
);
2872 for_each_port(adapter
, pidx
) {
2873 struct net_device
*netdev
= adapter
->port
[pidx
];
2874 struct port_info
*pi
;
2879 pi
= netdev_priv(netdev
);
2880 t4vf_free_vi(adapter
, pi
->viid
);
2881 free_netdev(netdev
);
2883 iounmap(adapter
->regs
);
2884 if (!is_t4(adapter
->params
.chip
))
2885 iounmap(adapter
->bar2
);
2890 * Disable the device and release its PCI resources.
2892 pci_disable_device(pdev
);
2893 pci_clear_master(pdev
);
2894 pci_release_regions(pdev
);
2898 * "Shutdown" quiesce the device, stopping Ingress Packet and Interrupt
2901 static void cxgb4vf_pci_shutdown(struct pci_dev
*pdev
)
2903 struct adapter
*adapter
;
2906 adapter
= pci_get_drvdata(pdev
);
2910 /* Disable all Virtual Interfaces. This will shut down the
2911 * delivery of all ingress packets into the chip for these
2912 * Virtual Interfaces.
2914 for_each_port(adapter
, pidx
)
2915 if (test_bit(pidx
, &adapter
->registered_device_map
))
2916 unregister_netdev(adapter
->port
[pidx
]);
2918 /* Free up all Queues which will prevent further DMA and
2919 * Interrupts allowing various internal pathways to drain.
2921 t4vf_sge_stop(adapter
);
2922 if (adapter
->flags
& USING_MSIX
) {
2923 pci_disable_msix(adapter
->pdev
);
2924 adapter
->flags
&= ~USING_MSIX
;
2925 } else if (adapter
->flags
& USING_MSI
) {
2926 pci_disable_msi(adapter
->pdev
);
2927 adapter
->flags
&= ~USING_MSI
;
2931 * Free up all Queues which will prevent further DMA and
2932 * Interrupts allowing various internal pathways to drain.
2934 t4vf_free_sge_resources(adapter
);
2935 pci_set_drvdata(pdev
, NULL
);
2938 /* Macros needed to support the PCI Device ID Table ...
2940 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
2941 static struct pci_device_id cxgb4vf_pci_tbl[] = {
2942 #define CH_PCI_DEVICE_ID_FUNCTION 0x8
2944 #define CH_PCI_ID_TABLE_ENTRY(devid) \
2945 { PCI_VDEVICE(CHELSIO, (devid)), 0 }
2947 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
2949 #include "../cxgb4/t4_pci_id_tbl.h"
2951 MODULE_DESCRIPTION(DRV_DESC
);
2952 MODULE_AUTHOR("Chelsio Communications");
2953 MODULE_LICENSE("Dual BSD/GPL");
2954 MODULE_VERSION(DRV_VERSION
);
2955 MODULE_DEVICE_TABLE(pci
, cxgb4vf_pci_tbl
);
2957 static struct pci_driver cxgb4vf_driver
= {
2958 .name
= KBUILD_MODNAME
,
2959 .id_table
= cxgb4vf_pci_tbl
,
2960 .probe
= cxgb4vf_pci_probe
,
2961 .remove
= cxgb4vf_pci_remove
,
2962 .shutdown
= cxgb4vf_pci_shutdown
,
2966 * Initialize global driver state.
2968 static int __init
cxgb4vf_module_init(void)
2973 * Vet our module parameters.
2975 if (msi
!= MSI_MSIX
&& msi
!= MSI_MSI
) {
2976 pr_warn("bad module parameter msi=%d; must be %d (MSI-X or MSI) or %d (MSI)\n",
2977 msi
, MSI_MSIX
, MSI_MSI
);
2981 /* Debugfs support is optional, just warn if this fails */
2982 cxgb4vf_debugfs_root
= debugfs_create_dir(KBUILD_MODNAME
, NULL
);
2983 if (IS_ERR_OR_NULL(cxgb4vf_debugfs_root
))
2984 pr_warn("could not create debugfs entry, continuing\n");
2986 ret
= pci_register_driver(&cxgb4vf_driver
);
2987 if (ret
< 0 && !IS_ERR_OR_NULL(cxgb4vf_debugfs_root
))
2988 debugfs_remove(cxgb4vf_debugfs_root
);
2993 * Tear down global driver state.
2995 static void __exit
cxgb4vf_module_exit(void)
2997 pci_unregister_driver(&cxgb4vf_driver
);
2998 debugfs_remove(cxgb4vf_debugfs_root
);
3001 module_init(cxgb4vf_module_init
);
3002 module_exit(cxgb4vf_module_exit
);